
样式: 排序: IF: - GO 导出 标记为已读
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New insights into the retardation mechanism of phosphorus slag on the early cement hydration Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-07 Shiyu Zhuang, Qiang Wang, Yichen Shan, Ruiquan Jia, Zihan Zhou
Phosphorus slag (PS) is widely reported to retard the cement hydration due to the existence of phosphorus and fluorine in it. However, the key role and its corresponding mechanism have not been fully reported. In this study, the effects of PS on the early cement hydration were investigated from the insights of solid phases, aqueous species and microstructures evolution. Results show that PS remarkably
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Optimization and performance regulation of pipe piles based on nano-calcium silicate hydrated (n-C-S-H) Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-07 Xiaofeng Han, Penggang Wang, Zijun Ling, Rihong Zhang, Zhenxing Du, Mengzhuo Sun, Xiaomeng Sui, Dongxuan Wei
Prestressed high-strength concrete (PHC) pipe piles are widely used in various construction projects. However, higher steam curing temperatures and times in the preparation of pipe piles severely affect material performance, while increasing cost and environmental pollution. This study investigates the use of nanoscale calcium-silicate-hydrate (n-C-S-H) to reduce curing temperature and time, ensuring
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Hydration and physicochemical immobilization mechanisms of pozzolanic-hazardous waste in supersulfated cement Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-10 Jiaxing Ban, Jian-Xin Lu, Bin Ma, Ligang Peng, Hongjian Du, Dingqiang Fan, Jun Yao, Baoshan Xing, Chi Sun Poon
Ordinary Portland cement (OPC) is a versatile cement binder suitable for solidifying hazardous wastes, while its production induces significant carbon emissions. This study developed a novel low-carbon supersulphated phosphogypsum slag cement (SPSC) with the inclusion of pozzolanic-hazardous waste and investigated the synergetic mechanism of its pozzolanic reaction and immobilization behavior. The
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Digital-Volume-Correlation-Assisted Crack Extraction using X-ray Computed Tomography Images of Cementitious Materials Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-07 Shuxian Hong, Zhongbo Yuan, Disheng Pan, Chuan Kuang, Biqin Dong, Shengxin Fan
The image segmentation results for microcrack detection suffer from poor continuity and integrity due to noise, grayscale inhomogeneity, and the very small size of microcrack voxels. Strain information is introduced to aid crack recognition and reduce the impact of image accuracy on crack detection. A new crack detection method is proposed that combines image processing and digital volume correlation
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Tensile behavior simulation of ECC/SHCC at subzero temperatures based on a fiber/interface combination constitutive model Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-06 Yanlin Huo, Xiaoyu Han, Chunran Wu, Dong Lu, Huayang Sun, Zhitao Chen, Yingzi Yang, Victor C. Li
The performance degradation of Engineered Cementitious Composites/ Strain-hardening cementitious composites (ECC/SHCC) at subzero temperatures is becoming a widespread concern. However, experimental testing and data acquisition in cold environments are very difficult and demanding. It is an inevitable trend to use numerical simulation for research. In this paper, a finite element model based on a fiber/interface
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Development of 3D-printable alkali-activated GGBFS and fly ash binder-based mortars with concrete demolition waste as aggregates Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-06 M. Gurunandan, Aparna Sai Surya Sree Nedunuri, Jayant Tanwar, Prakash Nanthagopalan, Salman Muhammad
3D-printable alkali-activated mortar mixtures using concrete demolition waste (CDW) as aggregates, which are pumpable, extrudable, buildable up to 1000 mm with an open time of 180 minutes were developed in this study. The mixtures provided a minimum compressive strength of 50 MPa at 28 days age. The effect of various parameters such as binder composition, water-to-binder ratio, molar modulus and activator
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X-ray computed tomography-based characterisation of graphene nanoplatelets re-agglomeration in hardened cement composites Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-05 Zhaohua Wang, Meini Su, Yong Wang, Cise Unluer, Suning Li
Graphene Nanoplatelets (GNPs) have been found to be an effective additive for enhancing the mechanical strength of cementitious materials, attributed to the role they play as nucleation sites. However, there is not a direct correlation on the enhancing effect of graphene with increasing graphene dosage, resulting in different optimal dosages for different binders and mix designs. This study aims to
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Innovative ZIF-8 modified ER@EC microcapsules: Enhancing slow-release and longevity for superior self-healing in cementitious materials Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-04 Shiyu Zhang, Zijian Song, Haoliang Zhang, Zilang Huang, Hui Rong, Linhua Jiang, Yunsheng Zhang
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A novel electromigration-based microbial self-healing strategy for existing concrete structures Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-04 Zhenxiao Bi, Jing Xu, Hao Sun, Qing Chen, Hehua Zhu
The prevailing self-healing of concrete cracks based on microbial-induced carbonate precipitation (MICP) has been limited to new structures since healing agents have to be pre-embedded during fresh mixing stage. In this study, a novel microbial self-healing strategy based on electromigration of bacterial spores is proposed for existing concrete. To this end, the feasibility of this new method is first
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Prediction of microbial-induced calcium carbonate precipitation for self-healing cementitious material Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-03 Hsiao Wei Lee, Seyed Ali Rahmaninezhad, Li Meng, Wil V. Srubar III, Christopher M. Sales, Yaghoob (Amir) Farnam, Mija H. Hubler, Ahmad R. Najafi
Microbial-induced calcium carbonate precipitation (MICCP) is a biomineralization process utilizing microbial metabolic activities to precipitate calcium carbonate (CaCO3). In recent years, there has been increasing interest in the application of MICCP in self-healing cementitious materials. In this research, the chemical and enzyme kinetics of MICCP were numerically modeled, focusing on the ureolytic
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Relation between pore structure uniformity and compressive strength of iron tailings mortar Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-31 Yi Li, Mengxuan Yu, Wei Li, Xin Bian
Pore structure uniformity is one of the key factors affecting the compressive strength of mortar. This study proposed two new methods to characterize the uniformity of pore distribution and established their relationship with compressive strength. Compressive and pore structure tests were carried out on ordinary mortar, iron tailings mortar, and iron tailings mortar containing basalt fibers and polyacrylate
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Effects and mechanisms of the hybrid-modified SAP with calcium sulfate dihydrate on the properties of UHPC Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-31 Deyu Kong, Zhentao Han, Zhiyang Chen, Chenxu Ni, Haotian Wu, Yaqian Liang, Kui He, Jintao Liu
In the synthesis process of superabsorbent polymer (SAP), calcium sulfate dihydrate (C$H2) dispersion in water or colloidal silica sol (CSS) was used for the modification of SAP. The effects of modification on water absorption of SAP in water or saturated calcium hydroxide (CH) solution and the impacts and mechanism of the modified SAP on the performance of UHPC were investigated. The results showed
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Integrated assessment of magnesium phosphate cement repaired concrete from the perspective of mechanical, geometric and electrochemical compatibility Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-30 Sijia Liu, Ken Yang, Long Yu, Linglin Xu, Qiang Yuan, Kai Wu, Zhenghong Yang
Magnesium phosphate cement (MPC) has gained more and more attention in the field of rapid repair and strengthening of normal concrete and reinforced concrete structures. Although the performance of MPC itself is of great concern, its compatibility with existing concrete is poorly understood. An effective testing method is necessary to assess the reliability of utilizing MPC mortar repairing construction
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Improving the performance of SiO2 nanoparticles in portland-limestone cementitious systems using silica-limestone composites Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-29 Qitong Liu, Payam Hosseini, Bu Wang
This study examines the effectiveness of doping SiO2 nanoparticles onto limestone substrates to mitigate nanoparticle agglomeration, thereby enhancing their performance through improved dispersion within the cement paste matrix. SiO2 nanoparticles were doped onto the limestone particles using the wet doping method, and the resulting SiO2-nanoparticle-limestone composite was incorporated into cement
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Improved microstructure and compressive strength of pastes and mortars containing MgO-SiO2 cement produced by combined calcination of MgCO3 and kaolin Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-28 J.P.B. Batista, G.C. Cordeiro, L.F. Ribeiro, J.C.B. Moraes
MgO-SiO2 cement was produced by combined calcination of MgCO3 and kaolin as raw materials, at a MgCO3/kaolin mass ratio of 3.0 and 800 °C for 45 min. Separate calcination of MgCO3 and kaolin was also conducted under the same conditions. Raw materials were characterized based on their chemical composition, bulk density, particle size distribution, XRD, FTIR, and BET specific surface area, and the MgO-SiO2
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An innovative structural energy storage solution using fly ash-cement composites for net-zero energy buildings Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-27 Ruidan Liu, Pan Feng, Zhaolong Liu, Long Yuan, Guanghui Tao, Zhenqi Yu, Xiangyu Meng, Jian Chen
The rapid advancement of renewable energy highlights the urgent need for safe, cost-effective, and scalable energy storage solutions, particularly for net-zero energy buildings. In this study, we introduce an innovative energy storage solution utilizing fly ash-cement composites (FCS) as multifunctional components. The FCS, incorporating fly ash as a mineral admixture, achieves a refined pore structure
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Influence of the water absorption-release processes of superabsorbent polymer with varying amounts of extra-entrained water on the surrounding cement paste Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-27 Fangyu Chen, Jingjing Lyu, Xinchun Guan, Jing Qiao, Heqing Gou
This paper investigates the influence of the water absorption-release process of superabsorbent polymer (SAP) with varying amounts of extra-entrained water on the properties of the surrounding cement paste and the macroscopic cement paste. 1H low-field nuclear magnetic resonance (NMR) was used to analyze the water absorption-release process of SAP. The macroscopic properties, including the void system
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Corrosion resistance of zinc in a low-carbon binder with belitic calcium sulfoaluminate cement Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-27 Wenxuan Li, Jinjie Shi
This study investigated the passivation ability and chloride-induced corrosion behavior of galvanized steel in the pore solutions of belitic calcium sulfoaluminate (BCSA) cement. Pure zinc was used to simulate the galvanized coating, and ordinary Portland cement (OPC) solution was also tested for the comparison purpose. A comparable passivation behavior was observed for pure zinc in the OPC solution
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Feasibility study of using carbonated and ultrasound treated electric arc furnace slag as a nano-enhanced supplementary cementitious material Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-27 Jiongqi Chen, Weiyu Li, Wenjie Huang, Qiujin Chen, Yuwei Ma, Mingzhong Zhang, Zongjin Li, Jiyang Fu, Xiaowei Ouyang
As a primary by-product of the electric arc furnace (EAF) steelmaking process, the relatively low carbonation capacity of EAF slag limits its use as a carbon-sequestering construction material. To address this limitation, this study proposed a two-step chemical-physical modification approach. First, a gas-solid carbonation process was applied, where humidity, temperature, CO₂ concentration, and carbonation
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Degradation behavior and self-healing mechanism of force-Cl- triggered microcapsule/ cementitious composites Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-25 Yanxuan Ma, Shuaifei Wang, Meiyu Li, Gongbin Wang, Jiatong Liu, Yuhua Gao, Peng Wang, Zhipeng Zhang
The performance of microcapsules in terms of “chloride response” and their electrochemical remediation mechanism is investigated. Electrochemical testing methods are used, i.e., kinetic potential polarization and electrochemical impedance testing. The variation rules of corrosion behavior of self-healing cementitious composites with different contents of microcapsules, both intact and pre-damaged,
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Experimental investigation on the bond performance of a hybrid lap-spliced connection of GFRP and stainless steel bars in concrete Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-25 Jiafeng Zhou, Jitong Zhao, Mengyan Peng, Marco Liebscher, Viktor Mechtcherine, Steffen Marx, Chongjie Kang
This paper investigates the bond performance of a hybrid lap-spliced connection of glass fiber reinforced polymer (GFRP) bars and stainless steel bars in concrete. To gain a comprehensive understanding, micro-level and macro-level mechanical studies are conducted. First, the microstructural characterization of GFRP bars is performed to comprehend the specific material features. Then, cantilever tests
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Estimating RC corrosion distribution from surface cracks using mesoscale analysis integrated with machine learning Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-25 Tianyu Shao, Jie Luo, Kohei Nagai
Understanding the degree of reinforcing bar corrosion in reinforced concrete (RC) structures is crucial for evaluating their residual performance. This study proposes a simulation system for estimating the distribution of corrosion along the rebar of a RC beam member based on surface crack widths. The system integrates the rigid body spring model (RBSM) with machine learning methods. The inputs are
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Effect of silica fume on corrosion resistance of cement-based materials under carbonic acid water environment Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-25 Jianhui Liu, Lurun Wu, Junmin Zhu, Hengrui Jia, Leping Liu, Shichong Zhang, Cong Yang, Zheng Chen, Caijun Shi
The effect of silica fume (SF) on corrosion depth, mass loss and compressive strength of mortar specimens over time under carbonic acid water environment were studied in this study. In addition, the thermal gravimetric analysis (TG-DTG), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to analyze the product evolution and microstructure
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Unveiling the synergistic effects of stray current and high hydraulic pressure on chloride transport in ultra-high-performance concrete Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-25 Mingyue Chen, Xin Kang, Yongqing Chen, Renpeng Chen
Ultra-high-performance concrete (UHPC) is a promising material for constructing future deep underground spaces owing to its exceptional toughness and durability. Nevertheless, the potential impact of stray currents and high hydraulic pressure on the durability of UHPC in deep underground electric projects (such as subways and electric railways) remains elusive. Moreover, existing experimental setups
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Advanced spectroscopic and microscopic insights into cement biodeterioration in sulfur-rich sewer systems Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-24 Janette Ayoub, Tony Pons, Marielle Guéguen Minerbe, Guilhem Simon, Gwénaël Gouadec, Sabrina Guérin, Vincent Rocher, Marc Offroy, Mario Marchetti
The biodeterioration of cementitious materials within sewer networks remains a critical problem that compromises the structural integrity and lifespan of these infrastructures essential to water treatment. This study pioneers the use of micro-Raman spectroscopic mapping, coupled with chemometric tools, to investigate the impact of high H2S levels and bacterial activity on high-resistance cementitious
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Study on the performance of polyester fibers modification system for low carbon magnesium silicate-based cementitious materials Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-24 Yuan Jia, Junwei Zhu, Enci Zhao, Jingxi Zhang, Shibo Li, Yaoting Jiang, Tingting Zhang, Libo Liu
To mitigate the environmental hazards posed by discarded plastics, polyester fibers produced from such waste have been incorporated into building composites. However, the durability of polyester fibers in cementitious environments is compromised by high alkalinity, which may lead to resource wastage. In this study, polyester fibers were embedded in magnesium silicate hydrate to develop a novel, highly
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Bottom-up innovation for sustainable leakproof Engineered Cementitious Composites (ECC) pipe: Design method, ECC material, and pipe structure Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-22 He Zhu, Jinping Ou, Dongsheng Li, Aamer Bhutta, Georgios Zapsas, Waleed Nasser, Mohammed Mehthel, Oscar Salazar, Victor C. Li
Low-carbon, low-cost, and durable water pipelines are urgently needed for sustainable cities. In this study, low carbon, cost-effective, leakproof Engineered Cementitious Composites (ECC) pipes were developed benefiting from the proposed ECC pipe design model and material innovation. The proposed model has been experimentally validated on ECC beam and ECC pipe. The developed desert sand Engineered
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Characterizing and modelling the bond-slip behaviour of steel bars in 3D printed engineered cementitious composites Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-22 Meng Chen, Kanghao Yu, Tong Zhang, Yuting Wang
Embedding rebars in 3D printed engineered cementitious composites (3DP-ECC) promises to improve the structural toughness and loading capacity, while a robust bond between them is critical for digital construction with reinforcements. This paper presents a series of pull-out tests on the bond behaviour between rebars and 3DP-ECC to investigate the effects of variable rebar arrangement direction, diameter
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Unbiased rheological properties determined by adversarial training with Bingham equation Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-21 In Kuk Kang, Tae Yong Shin, Jae Hong Kim
The Bingham model is generally used to describe the flow of cement-based materials, and its parameters, such as yield stress and plastic viscosity, are measured using a rheometer. However, the rheological measurement does not provide the unique Bingham parameters for a single material when rheometers take different rheological geometries or measuring protocols. This study constructs a model that can
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Enhancing photocatalytic efficiency and interfacial bonding on cement-based surfaces by constructing CaO-TiO2 hybrid catalysts Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-21 Xunli Jiang, Jian-Xin Lu, Yuqing Zhang, Chi Sun Poon
The application of titanium dioxide (TiO2) coating in cement-based materials faces challenges regarding its durability. This study presented the concept of ‘induced bonding’ for enhancing coating adhesion. By modifying TiO2 with CaO, nucleation sites were constructed on its surface, inducing the growth of hydration products and connecting the catalytic materials to the substrate. As a result, a novel
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Nano-mechanism of graphene oxide reinforced fly ash-slag based geopolymer materials to form high polymerization degree C-(A)-S-H: A new view of physical-chemical synergistic effect Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-17 Ben Li, Kai-Hang Li, Ying-Wu Zhou, Hu Xu, Can-Hao Zhao, Ying Yu, Zhuo-Cheng Li
This study mainly investigated the effect and mechanism of graphene oxide (GO) on the nucleation of C-(A)-S-H in fly ash-slag based geopolymer. A variety of material characterization methods and electronic structure analysis methods were combined to analyze the nanostructure changes and electronic transitions generated during the reduction of GO in an alkaline environment. Based on this change, the
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Multi-scale analysis of degradation mechanisms in magnesium phosphate cement paste under wet-dry cycling Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-17 Zihan Zhou, Haisen Jin, Qinyuan Liang, Qiang Wang, Jianshuai Hao, Shiyu Zhuang
Magnesium phosphate cement paste (MPC) is a promising rapid-repair material for pavements but is prone to degradation under wet-dry (W-D) cycling, which limits its durability. Current research lacks a detailed understanding of the damage and degradation mechanisms of MPC under these conditions. This study investigates the macroscopic mechanical behavior and mesoscopic damage progression of MPC during
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Improved corrosion resistance of 316 stainless steel in calcium sulfoaluminate cement incorporated with red mud and citrate Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-16 Xiaocheng Zhou, Jinjie Shi
The incorporation of red mud (RM) in calcium sulfoaluminate (CSA) cement offers a cost-effective and environmentally friendly solution for rehabilitation engineering, resulting in reduced carbon emissions. However, it may further reduce the setting time of CSA cement, thus causing inconvenience during construction. Moreover, the corrosion resistance of steel in CSA cement blended with RM is unclear
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Unlocking the role of silica gel in enhancing mechanical properties and water resistance of magnesium oxysulfate cement Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-15 Tingting Zhang, Qun Guo, Xiaoyang Chen, Chris Cheeseman, Hao Wang, Jun Chang
The continuous hydration of residual periclase to form brucite with expansive stress remains an issue for the utilization of hardened magnesium oxysulfate (MOS) cement in humid environments. This study explored converting residual periclase and brucite into magnesium silicate hydrate (M–S–H) gel to enhance the mechanical properties of MOS cement after water immersion. Changes to the hydration process
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Mechanism analysis of microwave-carbonation solidification for carbide slag-based low-carbon materials Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-15 Run-Sheng Lin, Yongpang Liao, Chaoshu Fu, Ting-Hong Pan, Rongxin Guo, Xiao-Yong Wang
This study proposes an innovative strategy for compacting carbide slag-based low-carbon bricks (CS-LCB) through a combination of microwave and carbonation curing, aiming to improve the properties through microwave pretreatment combined with carbonation curing and to realize the preparation of low-carbon materials. The effects of microwave pretreatment on the main properties of CS-LCB-containing limestone
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Evaluation of the induced mechanical deterioration of ASR-affected concrete under varied moisture and temperature conditions Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-15 O.D. Olajide, M.R. Nokken, L.F.M. Sanchez
Moisture and temperature are critical for developing alkali-silica reaction (ASR) in concrete. However, the influence of these exposure conditions on ASR-induced deterioration, specifically mechanical property losses, has not been well studied. To further our understanding, concrete cylinders made with Spratt reactive coarse aggregates and boosted in alkalis to 5.25 kg/m³ Na2Oeq were manufactured and
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Leveraging incinerator bottom ash for mitigating early age shrinkage in 3D printed engineered cementitious composites Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-14 Jie Yu, Fengming Xu, Hanghua Zhang, Junhong Ye, Jiangtao Yu, Jian-Guo Dai, Yiwei Weng
This study investigates the use of incinerator bottom ash (IBA) as a supplementary cementitious material to mitigate early age shrinkage in 3D printed engineered cementitious composites (3DP-ECC). IBA was processed through milling and thermal treatment before incorporation into 3DP-ECC. The fresh and hardened properties, hydration kinetics and products, early age shrinkage, and microstructural characteristics
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Sustainable geopolymer synthesis catalyzed by hexafluorosilicic acid: A low-energy approach using phosphate industrial waste Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-11 H. Majdoubi, Y. Haddaji, M. Nadi, H. Hamdane, S. Mansouri, R. Boulif, Y. Samih, M. Oumam, B. Manoun, J. Alami, Y. Tamraoui, H. Hannache
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Enhancing the workability retention of one-part alkali activated binders by adjusting the chemistry of the activators Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-10 Han Gao, Iman Munadhil Abbas Al-Damad, Ayesha Siddika, Taehwan Kim, Stephen Foster, Ailar Hajimohammadi
Alkali activated materials (AAMs), are gaining traction as sustainable alternatives to traditional Portland cement. However, their practical application is often limited by rapid setting times and poor workability. Although sodium carbonate and silica fume have been applied in synthesising AAMs, their effects on the reaction kinetics and structural development of one-part AAMs remain unknown. This
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Developing high-strength dry-cast pastes by incorporating carbonatable chlorellestadite Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-10 Hanxiong Lyu, Shipeng Zhang, Chi Sun Poon
A water-insoluble mineral, chlorellestadite (CE, Ca10(SiO4)3(SO4)3Cl2), would be formed in the preheater coatings of cement kilns when using chlorine-containing plastics as alternative fuels. This work investigated the viability of employing CE as an SCM to enhance the utilization of chlorine-containing fuels in cement-making. Substituting 20 wt% CE in dry-cast pastes (CE20), which were prepared by
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Energy storage properties and mechanical strengths of 3D printed porous concrete structural supercapacitors reinforced by electrodes made of carbon-black-coated Ni foam Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-09 Qifeng Lyu, Yalun Wang, Dongjian Chen, Shiyuan Liu, Justin Mbabazi, Pinghua Zhu, Jiquan Lu, Shaowei Wang, Fengxiang Yin
To increase the manufacturing efficiency of rechargeable concrete which can alleviate the problem that intermittent new energy is difficult to integrate into the power grid, a new type of concrete structural supercapacitor (CSSC) was proposed here by using mortar-extrusion 3D printing with the carbon-black-coated Ni foam being the electrodes and reinforcement. The printability, energy storage properties
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Insights into the synergistic action of initial hydration and subsequent carbonation of Portland cement Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-09 Jionghuang He, Yingliang Zhao, Yong Tao, Peiliang Shen, Chi Sun Poon
Pretreatment-induced initial hydration would significantly influence subsequent carbonation. However, the evolution of microstructure and performance resulting from the synergistic action of hydration and carbonation remains systematically unexplored. This study investigates carbonation kinetics, microstructure and micro/macro mechanical properties of carbonated cement pastes (CCPs) under the synergistic
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Porous biochar for improving the CO2 uptake capacities and kinetics of concrete Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-09 Matthieu Mesnage, Rachelle Omnée, Johan Colin, Hamidreza Ramezani, Jena Jeong, Encarnacion Raymundo-Piñero
Carbonation is a natural process in concrete where atmospheric CO2 diffuses into the pores of the material and reacts with cement hydrates to form calcium carbonate. Although this process can help to sequester atmospheric CO2 and mitigate rising levels in urban areas, it slows down over time, resulting in low CO2 uptake over the service life of concrete. This study proposes a sustainable method to
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New insights into the interaction between seawater and CO2-activated calcium silicate composites Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-09 Farzana Mustari Nishat, Ishrat Baki Borno, Adhora Tahsin, Warda Ashraf
This article presents the investigation findings on the combined effect of seawater and carbonation curing on two types of binders – blended binder containing blast furnace slag (BFS) and laboratory synthesized pure β-C2S. Samples were prepared using freshwater and seawater as mixing water. After casting, the samples were exposed to accelerated CO2 curing for 7 days and then exposed to seawater for
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Microstructure transformation of MCM-41 modified cement paste subjected to thermal load and modelling of its pore size distribution Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-09 Maciej Szeląg, Patryk Rumiński, Rafał Panek
This study examines the effects of highly reactive, mesoporous MCM-41 silica on the thermal resistance and microstructural stability of Portland cement paste (CP). The motivation is to enhance cement composites (CC) properties using supplementary cementitious materials (SCMs), addressing environmental challenges from global cement production. The research involved modifying CP with 0–2 wt% MCM-41 and
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Mechanical performance enhancement of UHPC via ITZ improvement using graphene oxide-coated steel fibers Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-08 Yuan Gao, Zhangjianing Cheng, Jiajian Yu, Xiaonong Guo, Yanming Liu, Weiqiang Chen
By virtue of its superior strength, high toughness, and low porosity, ultra-high-performance concrete (UHPC) has a wide range of application prospects in construction engineering. However, the interfacial transition zone (ITZ) formed between the cementitious matrix and steel fiber seriously restricts the steel fiber's strength utilization rate in UHPC. Hence, in this work, graphene oxide (GO) is employed
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Carbon capture and storage CO2 foam concrete towards higher performance: Design, preparation and characteristics Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-07 Dingqiang Fan, Jian-Xin Lu, Xue-Sen Lv, Takafumi Noguchi, Rui Yu, Chi Sun Poon
This study introduces a novel strategy for carbon capture and utilization by incorporating CO2 into foams to develop CO2 foam concrete (CFC) with high performance. A conceptual design approach for CFC was first proposed by incorporating tailor-made CO2 foam into an optimized cement-based paste. The engineered CO2 foam exhibited fine size and good stability, but increasing CO2 concentration decreased
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Rheology and mechanical properties of limestone calcined clay based engineered cementitious composites with nano CaCO3 Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-07 Yuting Wang, Meng Chen, Tong Zhang, Mingzhong Zhang
The application of advanced binder consisting of limestone, calcined clay and cement (LC3) promotes the development of low-carbon engineering cementitious composites (ECC). In order to improve the comprehensive properties of LC3-ECC, this paper investigates the feasibility of using nano CaCO3 (NC) to replace the limestone powder up to 20 % for LC3-ECC preparation through rheology and mechanical tests
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Comparative analysis of carbonation strengthening mechanisms in full solid waste materials: Steel slag vs. carbide slag Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-06 Qi Zhang, Pan Feng, Xuyan Shen, Yuxi Cai, Houru Zhen, Zhichao Liu
Maximizing the use of solid wastes to replace energy-intensive cement while maintaining the comparable mechanical properties is a promising strategy for developing negative carbon building materials. In this paper, full steel slag/carbide slag blocks were prepared by pressing and subsequent carbonation to enhance mechanical properties and capture CO2. The evolution of carbonation degree and compressive
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Activation of BOF slag with dipotassium hydrogen phosphate: Enhancing hydration, carbonation resistance, and heavy metal leaching Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-06 Yanjie Tang, Katrin Schollbach, Sieger van der Laan, Wei Chen
This study investigates the hydration of basic oxygen furnace (BOF) slag activated by dipotassium hydrogen phosphate (DKP) up to 3 wt%. The findings reveal that DKP-activated BOF slag pastes exhibit improved strength, leaching behavior, and carbonation resistance. DKP-activated BOF slag pastes facilitate the completion of the main exothermic reaction within 3 days. Increasing DKP from 1 to 3 wt% extends
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In-depth analysis of Lime-hemp concrete and water vapor interactions: Effect of water default and prediction of the sorption behavior Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-06 Brahim Mazian, Giana Almeida, Nils Frantz, Patrick Perré
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Micromechanical model and performance-driven design strategy for textile reinforced engineered cementitious composite (TR-ECC) Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-03 Peiyun She, Shuhang Ye, Yiming Yao, Deju Zhu, Cong Lu
Textile reinforced engineered cementitious composite (TR-ECC) is a cementitious composite reinforced with continuous textiles and short random fibers, characterized by high tensile strength and strain capacity due to the successive formation of multiple fine cracks. Various tensile failure modes of TR-ECC have been extensively observed in experimental studies, while clear classification of these failure
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Enhancing dispersion and mechanical properties of carbon nanotube-reinforced cement-based material using polymer emulsions Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-03 Shi-Wei Zhang, Ru Wang, Jiao-Long Zhang, Yong Yuan
This study explores the effect of polymer concentration on the dispersion of carbon nanotubes (CNTs) and the mechanical properties of cement-based materials via tests and molecular dynamics (MD) simulations. The results showed that all three polymers (ethylene-vinyl acetate (EVA), styrene-acrylate (SAE), and styrene-butadiene (SB) copolymers) significantly enhanced CNTs’ dispersion. The key factors
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Effect of soluble phosphate on strength development of anhydrite calcined from phosphogypsum Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-03 Ying Hua, Zhichao Zhang, Lu Yuan, Jueshi Qian, Yanfei Yue, Zhen Li, Xingwen Jia
The soluble phosphates in phosphogypsum (PG) are generally considered to hinder its utilization without pretreatments. This paper investigated the positive effect of soluble phosphates on the strength development of anhydrite calcined from PG at 800 °C for 1 h. PG, washed PG with different soluble phosphate contents, washed PG added with washed water, and flue gas desulfurization gypsum (FGD) were
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Design and function of thermoresponsive-ultrafast stiffening suspension formulations for 3D printing Cement Concrete Comp. (IF 10.8) Pub Date : 2025-01-02 Sharu Bhagavathi Kandy, Sebastian Remke, Thiyagarajan Ranganathan, Shubham Kiran Wani, Xiaodi Dai, Narayanan Neithalath, Aditya Kumar, Mathieu Bauchy, Edward Garboczi, Torben Gädt, Samanvaya Srivastava, Gaurav Sant
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A novel strategy utilizing graphene oxide/functionalized carbon nanotube/nanosilica sheet for nanomaterial incorporation in cement paste Cement Concrete Comp. (IF 10.8) Pub Date : 2024-12-30 Heongwon Suh, Doheon Koo, Dong-Hee Son, Jin Park, Sooheon Kim, Baek-Il Bae, Chang-Sik Choi, Hongyun So, Sungchul Bae
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Performance and characterization of nano-engineered silica waste concrete composite for efficient marine radionuclides remediation Cement Concrete Comp. (IF 10.8) Pub Date : 2024-12-27 Jean-Baptiste Mawulé Dassekpo, Chonkei Iong, Dejing Chen, Feng-Liang Zhang, Xiaoxiong Zha, Jianqiao Ye
The disposal of solid and radioactive waste poses significant risks to terrestrial and marine ecosystems. This study presents a sustainable solution by recycling silica-rich glass waste (RG) and fly ash (FA) to develop a functional nanocomposite concrete for radionuclide treatment. A Radionuclide removal Zeolite (RrZ) was hydrothermally synthesized from RG powder at low temperature and NaOH molar ratio
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Preparation of adsorbed bismuth-based visible light photocatalytic materials and their effects on the performance of cement-based materials Cement Concrete Comp. (IF 10.8) Pub Date : 2024-12-27 Yidong Xu, Yuquan Wang, Weijie Fan, Shi-Tong Li, Xiaoniu Yu
In order to effectively solve the problem of pollutant degradation in cement-based materials, the BiVO4 was introduced into the reconstruction of the water-encountered MgAl-LDHs layer after calcination utilizing the memory effect of MgAl-LDHs which successfully prepared the highly adsorbable visible light photocatalytic material, BiVO4/MgAl-LDHs. Its layered structure results in a large specific surface
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Enhancement of recycled concrete aggregate through slag-coated carbonation Cement Concrete Comp. (IF 10.8) Pub Date : 2024-12-27 Hammad Ahmed Shah, Weina Meng
This study aims to enhance the utilization rate of recycled concrete aggregate (RCA) in structural concrete through the application of a novel carbonation treatment method to improve the microstructure of old adhered mortar in RCA and enhance its compatibility with the new concrete. Carbonation of RCA is a commonly used method to densify the microstructure of old adhered mortar, but it exhibits limitations
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Tensile performance of pre-cracked UHPC under the coupled actions of sustained loading and corrosive media Cement Concrete Comp. (IF 10.8) Pub Date : 2024-12-25 Yiming Yao, Gan Wu, Kaimeng Yang, Hongrui Zhang, Jianan Qi, Yuqing Hu, Jingquan Wang, Hongyu Zhou
This study investigated the tensile performance of pre-cracked ultra-high performance concrete (UHPC) subjected to sustained loading and various environmental conditions, including air, water, and 3 % NaCl solution. The findings indicated that prolonged tensile loading significantly reduced the tensile properties of UHPC, particularly at higher stress levels. Interestingly, the presence of water and