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Study on the effect of gypsum content in cement on the adaptability between cement and alkali-free accelerator at different temperatures Adv. Cem. Res. (IF 2.0) Pub Date : 2023-12-26 Qin Wang, Zhixiang Guo, Fanchao Zeng, Hongwei Wang, Huaixia Qin
The setting time and early strength of shotcrete is greatly affected by the gypsum content of cement. In this paper, setting time and compressive strength, and microscopic methods such as XRD quantitative analysis, thermogravimetric analysis and scanning electron microscope observation were used to determine the effects of changes in gypsum content on the hydration and mechanical properties of cement
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Accelerated carbonation of regenerated binding material prepared with waste cement paste powder Adv. Cem. Res. (IF 2.0) Pub Date : 2023-12-25 Linnu Lu, Peng Wang, Yongjia He, Ma Jie, Fazhou Wang, Shuguang Hu
An approach for efficient re-utilization of waste cement paste powders is proposed, that is, the powders are heated to a certain temperature to prepare Regenerated Binding Materials (RBMs), and then rapid carbonated by high concentration CO2 to prepare high-strength products. The structural evolution during the heating process of waste cement paste powder and the carbonation process of RBMs were investigated
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Synthesis and characterization of supersulfated cements from kaolin, quartz and NaOH Adv. Cem. Res. (IF 2.0) Pub Date : 2023-12-25 Meixun Peng, Yuanpeng Zhang, Wenjuan Liu, Fei Song
Supersulfated cements (SSC), being possible green alternatives to Portland cements, have demand to develop new kinds of precursors instead of blast furnace slag. The mixture of kaolin, quartz and NaOH was calcined to prepare SSC by grinding the clinkers with lime and gypsum. The preparation factors were investigated and multiple characterization methods were adopted to explore the calcination and hydration
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Enhancing the performance of aerated concrete through accelerated curing and waste material integration Adv. Cem. Res. (IF 2.0) Pub Date : 2023-12-17 Pradyut Anand, Anand Kr Sinha, Puja Rajhans
This article discusses the mechanical and durability properties of aerated blocks. In present study, aerated blocks prepared by using different cementitious materials along with the alkaline solution (AS) in the absence of aluminium powder. The proportions of raw materials are chosen after performing two mix trials P1 and P2, keeping the density of blocks constant i.e., 800 kg/m3. Each mix is further
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Further study of the erosion mechanism of calcium salt on 517 phase Adv. Cem. Res. (IF 2.0) Pub Date : 2023-12-15 Yan Guan, Xiao Han, Zhiqi Hu
As the main hydration product of magnesium oxysulfate (MOS) cement, 517 phase (5Mg(OH)2·MgSO4·7H2O) is one of the main sources of MOS cement strength. At present, the experimental results show that calcium ions have a great influence on the stability of 517 phase, so this paper mainly explores the erosion process and mechanism of calcium ions on 517 phase. The 517 phase with 94.56 % purity was synthesized
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Effects of calcium impurities on properties of magnesium oxychloride cement Adv. Cem. Res. (IF 2.0) Pub Date : 2023-12-15 Xinkuang Ning, Yong Zhang, Chengyou Wu
China's salt lakes contain an abundance of magnesium resources, and salt-lake brine, a by-product of potash fertilizers, is often discharged back into the salt lakes, causing environmental damage. MgO from salt-lake brine can be used to produce magnesium oxychloride cement (MOC). However, the calcium impurities present in salt lakes affect the properties of MOC. To investigate the effects of these
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Effect of polycarboxylate superplasticizer and calcium nitrite on the fluidity and early strength of belite sulfoaluminate cement Adv. Cem. Res. (IF 2.0) Pub Date : 2023-12-13 Juan Fu, Baorui Hu, Wei Guo, Yueyang Hu, Cuifeng Jiang
Belite sulfoaluminate cement is attracting increasingly attention and considered as a prospective alternative to Ordinary Portland cement (OPC) owing to the lower preparation temperature and CO2 emission. However, it still has disadvantages of poor workability and low early strength. Accordingly, this study investigated the effect of compound polycarboxylate superplasticizer (PCE) and early strength
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Performance of the phase change material (PCM) to reduce freeze-thaw effect in cementitious composites Adv. Cem. Res. (IF 2.0) Pub Date : 2023-12-09 Fatih Acikök, Mehmet Kemal Ardoğa, Mustafa Şahmaran
One of the contemporary approach to reduce the damage on cementitious composite resulted from freeze-thaw effect is the incorporation of the phase-change materials (PCM). In this study, the composites were produced adding n-tetradecane, which is a microencapsulated organic PCM, at rates of 0, 2, 4, 6 and 8 % of the cement weight. In two different simulations representing the climate conditions of the
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Mechanical, durable, and microstructural properties of cement mortar mixes containing fine reclaimed asphalt pavement aggregates and zinc waste Adv. Cem. Res. (IF 2.0) Pub Date : 2023-12-09 Surendra Kumar Saini, Surya Kant Sahdeo, G.D.R.N. Ransinchung, Praveen Kumar
The cement mortar mixes were developed with the intent of testing the suitability of fine graded reclaimed asphalt pavement aggregates as a replacement for naturally fine materials. The natural fine aggregates were replaced in multiple percent levels of 25%, 50%, 75%, and 100% by weight. The results demonstrate that the mechanical qualities of the mortar mix are deteriorating. To address this, zinc
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Effects of gold tailings dosage and PVA fiber content on the frost resistance of ECC Adv. Cem. Res. (IF 2.0) Pub Date : 2023-12-09 Zhi Ge, Chuansong Chen, Yufeng Bi, Hongzhi Zhang, Yanhua Guan, Yongwei Yang, Yifeng Ling, Renjuan Sun
In this study, the effect of gold tailings on the frost resistance of engineered cementitious composites (ECC) was investigated. The ECC were made with three gold tailings dosages and four polyvinyl alcohol (PVA) fiber contents. A water-binder ratio (W/B) of 0.28 was used for all mixtures. Surface damage, mass loss, relative dynamic elastic modulus, compressive strength and damaged layer thickness
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Effects of thermal activation on the hydration performance of lithium slag–cement composite binder Adv. Cem. Res. (IF 2.0) Pub Date : 2023-12-06 Yan He, Chunyang You, Shuhua Liu, Mingjing Jiang, Pengcheng Shi
In order to enhance the utilisation efficiency of lithium slag (LS) in cement-based materials, calcification and thermal activation of LS were conducted, and the activation mechanism was analysed. Results showed that gypsum and spodumene in LS decomposed at high temperature by way of calcification and thermal activation, and spodumene as well as limestone calcination decomposed at high temperature
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Investigation of dynamic compression properties of basalt fiber reactive powder concrete Adv. Cem. Res. (IF 2.0) Pub Date : 2023-12-04 Haiyang Sha, Jinchun Liu, Xianwen Fu
Basalt fiber reactive powder concrete (BFRPC) was prepared by incorporating basalt fibers (BFs) instead of steel fiber into reactive powder concrete (RPC). In this study, we experimentally and numerically analyzed the impact resistance of BFRPC at different strain rates (101∼101 s1). The Φ75mm Split Hopkinson pressure bar (SHPB) was used for impact compression tests and the finite element software
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Effect of gypsum on the hydration of fused cement clinker from basic oxygen furnace slag Adv. Cem. Res. (IF 2.0) Pub Date : 2023-11-24 Katharina Schraut, Burkart Adamczyk, Christian Adam, Dietmar Stephan, Birgit Meng, Sebastian Simon, Julia von Werder, Tamino Hirsch, Tanja Manninger
Fused cement clinker can be produced from molten basic oxygen furnace slag (BOFS) via a reductive thermochemical treatment. During the thermochemical treatment, oxidic iron is reduced to metallic iron and separated. The resulting low-iron slag has a chemical and mineralogical composition similar to ordinary Portland cement (OPC) clinker. In this study, the hydraulic reactivity of the fused clinker
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Parametric analysis of the production of alternative sodium silicate applied in alkali-activated materials Adv. Cem. Res. (IF 2.0) Pub Date : 2023-11-21 Deise Trevizan Pelissaro, Suelen Cristina Vanzetto, Francisco Dalla Rosa, Pedro Domingos Marques Prietto, Adriana Augustin Silveira
Although alkali-activated materials are considered potential substitutes for Portland cement, they still present elevated costs and significant emissions of CO2. One way to partially overcome this disadvantage is the development of alternative activators, such as a sodium silicate based on the dissolution of rice husk ash (RHA). However, to maximize the mechanical performance of alkali-activated materials
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Hydration properties of the composite cementitious materials containing steel slag under steam curing condition Adv. Cem. Res. (IF 2.0) Pub Date : 2023-11-17 Maosen Li, Xiao Liang, Long Chen, Shuhua Liu
Steel slag (SS) is a by-product of steel industry, and its recycling is of great significance. In this study, the influence of SS fineness and curing regimes on the hydration properties of cement and the effects of SS content on the compressive strength of pastes were investigated. The hydration products and microstructure of pastes were further explored through X-ray diffraction (XRD) and Scanning
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Processing of calcium sulfoaluminate eco-cement coatings containing microencapsulated phase change materials Adv. Cem. Res. (IF 2.0) Pub Date : 2023-11-11 Andrea Romero-Espinosa, Susana G. Sanfélix, Alejandro Morales-Cantero, Ana Cuesta, Anna-Lena Kjøniksen, Miguel A. G. Aranda, Angeles G. De la Torre, Isabel Santacruz
On the one hand, calcium sulfoaluminate (CSA) eco-cements release about 40% less carbon dioxide (CO2) than Portland cement during fabrication; on the other hand, phase change materials dispersed in a cementitious matrix can help to optimise the indoor temperature of buildings, reducing carbon dioxide emissions related to heating/air conditioning. However, this is only economically viable if it is used
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Effect of the use of retardant chemical additive in concrete on rebar corrosion Adv. Cem. Res. (IF 2.0) Pub Date : 2023-11-11 Behçet Dündar, Emriye Cinar Resuloğullari, Turhan Can Karci
Reinforced concrete (RC) is one of the most widely used building materials. However, RC, especially in coastal seaside or humid environments, can suffer reinforcement corrosion with the result that the reinforcement fails to perform its function over time. The effect of a retarder additive used to eliminate loss of consistency in hot, windy and humid weather on the corrosion of RC elements was investigated
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Effects of waste magnesia powder as partial cement replacement on self-compacting concrete Adv. Cem. Res. (IF 2.0) Pub Date : 2023-11-08 Songül Can, Ali Sariisik, Tayfun Uygunoğlu
This experimental study investigated the performance of self-compacting concrete (SCC) mixes with magnesia (MgO) waste. In the series produced with a water/binder ratio of 0.40, cement was replaced by magnesia waste at 2%, 4% and 10% by weight in the SCC. Le Chatelier test, slump flow, compressive strength, flexural strength, depth of penetration of water under pressure, ultrasonic pulse velocity and
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Acoustic behaviour of Portland cement paste with sodium gluconate additive during hydration Adv. Cem. Res. (IF 2.0) Pub Date : 2023-10-25 Xu Dongyu, Chen Huaicheng, Hao Longlong, Zhao Hongyi, Guan Xuemao, Hu Yan, Sha Fei
The ultrasonic pitch–catch method was used to study the hydration behaviour of Portland cement paste with sodium gluconate (SG) additive using a tailor-made piezoelectric transducer. X-ray diffraction analysis showed that the intensity of the diffraction peak of calcium hydroxide decreased with increasing SG content (CSG), especially for CSG > 0.10 wt%. The compressive strength of the hardening cement
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Expansion properties of concrete containing circulating fluidised bed fly ash for use in concrete-filled steel tubes Adv. Cem. Res. (IF 2.0) Pub Date : 2023-10-17 Ruizhen Yan, Guoju Ke, Dongxiao Han
In the context of green and low-carbon materials development, the influence of replacing cement with circulating fluidised bed fly ash (CFBFA) on the expansion properties of paste under different curing conditions was first systematically investigated. Then, self-compacting concretes (SCCs) with recycled aggregate (RA) and CFBFA were prepared for filling steel tubes. The experimental results showed
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Characterization of cement loaded with magnetically aligned nano-magnetite Adv. Cem. Res. (IF 2.0) Pub Date : 2023-10-16 Taha M. Jassam, Bonnie Lau, Jason Ng Yang-Zhi, Kow Kien-Woh, Ramez A. Al-Mansob, Bariş Erdil, Wenjie Luo
In this study, the effect on the compressive strength of cement with the addition of 1-5 wt% nano-magnetite particles (nano-Fe3O4) has been identified at the age of 7 days and 28 days curing. In addition, an approach of aligning these nano-magnetite particles within cement using an external magnetic field was presented, where the orientation of nano-magnetite particles was aligned parallel to the compressive
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Effect of sisal fibre treatment on the hydration and thermophysical properties of a cement biocomposite Adv. Cem. Res. (IF 2.0) Pub Date : 2023-10-04 Bouchra Bahja, Lhaj el Hachemi Omari, Abdselem Tizliouine, Assaad Elouafi, Hayat Salhi, Mohammed Chafi
Cement-based biocomposites are a current area of construction research. Plant fibres retard the setting times of cement due to their hydrophilic nature and the thermal properties of raw cement mortar containing plant fibres can be problematic. This aim of this work was to study the effect of fibre treatment to reduce the hydrophilicity of natural fibres while enhancing the thermal properties of the
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Estimation of compressive strength of cement mortars using impulse excitation technique and a genetic algorithm Adv. Cem. Res. (IF 2.0) Pub Date : 2023-09-20 Muftah Mohamed Baroud, Arif Sari, Sherzod Shukhratovich Abdullaev, Majid Samavatian, Vahid Samavatian
Compressive strength, a crucial mechanical property of cement mortars, is typically measured destructively. However, there is a need to evaluate the strength of unique cement-based samples at various ages without causing damage. In this paper, a predictive framework using a genetic algorithm (GA) is proposed for estimating the compressive strength of ordinary cement-based mortars based on their dynamic
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Computational study of multiphase flow in cement plant gas conditioning towers: a review Adv. Cem. Res. (IF 2.0) Pub Date : 2023-09-06 Mohammad Hossein Abbaszadeh, Javad Sepahi-Younsi
Gas conditioning towers (GCTs) or cooling towers have broad industrial applicability, especially in the cement industry. Most cement factories deal with the same problems faced by other factories. However, the solutions to these problems are barely internationally published and have not received much attention, meaning a lot of time and money is spent on researching previous solutions. Iran is among
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Potential of sodium chloride solution as mixing water in calcium aluminate cement modified with siliceous minerals Adv. Cem. Res. (IF 2.0) Pub Date : 2023-08-24 Yue Zhou, Yuting Chen, Zhongping Wang, Zheyu Zhu, Linglin Xu
Calcium aluminate cement (CAC) is advantageous in marine engineering, and using materials directly from the sea when mixing CAC can reduce both construction costs and ecological pollution to the sea. However, using seawater as the mixing water in CAC is difficult due to the strength reduction. In this work, CACs were prepared with siliceous minerals (SMs) (diatomite and silica fume (SF)) and sodium
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Comprehensive modelling of drying shrinkage strain of graphene oxide nanosheet concrete Adv. Cem. Res. (IF 2.0) Pub Date : 2023-08-02 Mohammad Javad Mahmoodi, Masoumeh Khamehchi, Mohammad Safi
A comprehensive semi-empirical model was developed to predict the drying shrinkage strain (DSS) of concrete reinforced with graphene oxide nanosheets (GONs). The model includes various internal and external parameters. The effects of three factors (the age when drying starts, the GON content and aspect ratio) on the DSS of concrete reinforced with GONs were investigated. Compared with the results of
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Microstructure and physical properties of fly-ash-based geopolymer with the addition of expanded vermiculite Adv. Cem. Res. (IF 2.0) Pub Date : 2023-08-02 Yi Huang, Xiangdong Qing, Li Lin, Bicai Li, Lin Xu, Yinglin Peng
Fly-ash-based geopolymer pastes with the addition of expanded vermiculite (EV) powder were synthesised and their microstructure, compressive strength, setting time, moisture control, extent of efflorescence and thermal conductivity were studied. It was found that the addition of EV resulted in an increase in the standard-consistency water consumption and setting times. As a consequence, excessive addition
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Improving capillary water absorption of high-volume fly ash mortar by curing temperature and limestone addition Adv. Cem. Res. (IF 2.0) Pub Date : 2023-07-27 Yunfei Di, Haitao Zhao, Xiaoxiong Li, Yun Chen, Zhenqing Shi, Xiaolei Man
The effects of curing temperature (20°C, 40°C and 60°C) and the addition of limestone powder (LP) (6% and 12%) on the capillary water absorption (CWA) of high-volume fly ash (HVFA) cement mortar were investigated. X-ray diffraction analysis and tests for chemically bound water content (CBWC), compressive strength and porosity were also conducted. It was found that, for a fly ash (FA) content exceeding
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Fingerprinting Portland cements by means of 87Sr/86Sr and 143Nd/144Nd isotope ratios and geochemical profiles Adv. Cem. Res. (IF 2.0) Pub Date : 2023-07-18 Anera Kazlagić, Stephan Dietmar, Markus Ostermann, Antonio Possolo, Jochen Vogl
This study uses conventional 87Sr/86Sr and 143Nd/144Nd isotope and interelement ratios of Ca, Sr, K, Mn, Mg and Ti as fingerprints for provenancing ordinary Portland cements (OPC). Herein, the first database of Sr and Nd isotope ratios investigated in OPCs, stemming from 29 cement plants located worldwide, was created. The results show that the Sr isotope ratios of OPCs are higher than those of seawater
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Early hydration studies of cementitious materials incorporating nanoalumina Adv. Cem. Res. (IF 2.0) Pub Date : 2023-07-10 Usha Sharma, Reetam Chaudhury, Lok Pratap Singh, Chi-Sun Poon
Concrete technologists use different types of additives such as fly ash, slag, natural pozzolans and nanomaterials toenhance concrete performance and durability. However, a detailed explanation of the early-age hydration process and microstructural modification of concrete in the presence of nanomaterials remains to be presented and extensive research is required for strategic modification of cementitious
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Phase evolution and burnability of cement raw meal Adv. Cem. Res. (IF 2.0) Pub Date : 2023-07-04 José Aguirre Castillo, Markus Broström, Matias Eriksson
The use of high-temperature X-ray diffraction (HT-XRD) to study the mass transfer of raw meal constituents towards forming clinker phases and the occurrence of free lime (calcium oxide), also known as burnability, was assessed. A measuring strategy with temperature ranging from 1000°C to 1450°C was developed and compared with a conventional burnability method. The free lime determined by the methods
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Effect of recycled oyster shell powder on hydration and strength development of magnesium phosphate cement Adv. Cem. Res. (IF 2.0) Pub Date : 2023-06-27 Bingcong Chen, Junping Zhang, Airong Liu, Liwen Zhang, Zhujian Xie, Xiaowei Ouyang, Zhongguo John Ma
Using oyster shell powder (OSP) to prepare magnesium phosphate cement (MPC) not only reduces the pollution caused by the wasted oyster shell disposal, but also benefits the development of more environmentally friendly cement. The effect of OSP on the hydration and strength development of MPC was studied. An axial compression experiment including 45 cuboid specimens was executed to investigate the compressive
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Molecular dynamics study on the adsorption of radioactive ions by geopolymers Adv. Cem. Res. (IF 2.0) Pub Date : 2023-06-19 Yongming Tu, Tongfang Wang, Rongjia Wen, Jie Cao, Mengxiang Fang, Chao Wang, Gabriel Sas, Lennart Elfgren
The construction of nuclear power plants necessitates careful consideration of the discharge and fixation of nuclear waste. Geopolymers are new cement-based materials (CBMs) with three-dimensional cage-like structures that enable effective nuclear waste fixation. In this work, the adsorption of radioactive caesium and strontium ions by sodium aluminosilicate hydrate (NASH) gel, the main component of
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Internal corrosion cracks evolution in reinforced magnesium oxychloride cement concrete Adv. Cem. Res. (IF 2.0) Pub Date : 2023-06-16 Penghui Wang, Hongxia Qiao, Qiong Feng, Cuizhen Xue
In view of the difficulty of identifying internal micro corrosion-induced cracks in concrete and the poor accuracy of quantitative analysis, which results in inaccurate results regarding the law of formation of internal cracks, reinforced magnesium oxychloride cement concrete (RMOCC) was subjected to a galvanostatic acceleration test, and X-CT technology was combined with the support vector machines
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Effect of phosphate ester grinding aids on cement grinding and water-reducing performance Adv. Cem. Res. (IF 2.0) Pub Date : 2023-06-06 Lin Hu, Fan Yang, Yijia Huang, Kaixuan Yang, Binbin Li
Phosphate ester polymers were prepared from phosphate ester monomers for the first time and their effects as cement grinding aids and water-reducing performance were studied. Fourier-transform infrared (FTIR) spectroscopy and tests for standard viscosity, setting time, mortar fluidity, mortar compressive strength were conducted. The results showed that hydroxyethyl dibutyl phosphate reduced the residues
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Cryogenic cooling using liquid nitrogen to produce massive concrete: temperature, setting time and compressive strength Adv. Cem. Res. (IF 2.0) Pub Date : 2023-06-05 Malik I. Alamayreh, Rana A. M. Alhorani, Subhi M. Bazlamit
Mixing cement with water in mass concrete production is associated with hydration heat generation, which may cause concrete mixes to dry out and crack. The experimental work aims to evaluate the effects of using liquid nitrogen (LN) in cooling mortar mixes and concrete. LN was used in doses of 0, 25, 50, 75 and 100% by water volume to either cool the mixing water at T = 4°C or to inject it into concrete
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Enhancement of geopolymerisation reactivity and thermal resistance using mixed types of fly ash Adv. Cem. Res. (IF 2.0) Pub Date : 2023-06-05 Viengsai Phavongkham, Suthee Wattanasiriwech, Darunee Wattanasiriwech
Geopolymers prepared with class C fly ash (FA) often suffer from a flash geopolymerisation rate, making it difficult to work. Class F FA, however, may have low reactivity, so an admixture must be added to solve this problem. This research highlighted the use of mixed class C and class F FA as a precursor for geopolymer preparation to alleviate such problems. Optimisation of the precursor recipe and
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Investigation on water resistance of basic magnesium sulfate cement containing weak organic acids Adv. Cem. Res. (IF 2.0) Pub Date : 2023-05-30 Xun Xu, Bei Zhu, Tiancheng Lin, Yingjiang Li, Yongtao Sun, Bo Yu, Hailong Hu, Zongyue Hu, Qian Dong
Magnesium oxysulfate cement has low strength and poor water resistance, so an additive is essential for the preparation of basic magnesium sulfate cement (BMSC). In this paper, the effects and the mechanisms of three organic weak acids on the water resistance in relation to flexural strength of BMSC are investigated. The results show that malic acid fails to ameliorate the water resistance in relation
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Rheology of cement–sodium silicate grout containing bentonite and cellulose ether at high temperatures Adv. Cem. Res. (IF 2.0) Pub Date : 2023-05-24 Rentai Liu, Xiuhao Li, Shucai Li, Chunyu Zhang, Mengjun Chen, Canxun Du, Sanlin Du
Cement–sodium silicate grout (CSG) is widely used to control water inrush disasters, and its apparent viscosity considerably impacts its water-plugging effect. However, traditional grouting materials and methods are inappropriate for high-temperature environments as high temperatures can affect the grout's viscosity. To thicken grout and increase its apparent viscosity, viscosity-modifying admixtures
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Utilising under-burnt waste bricks from kilns as supplementary cementitious material Adv. Cem. Res. (IF 2.0) Pub Date : 2023-05-19 Mani Mohan, Birendra Kumar Singh
The pozzolanic performance of crushed brick powder (CBP), obtained by grinding under-burnt waste bricks from a continuous brick kiln, is studied. Two size fractions of CBP considered for cement replacement are CBP1 (passes through 150 μm but is retained on 75 μm) and CBP2 (passes through 75 μm). Compressive strength tests on mortar with CBP reveal that strength does not exceed that of the control;
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Analysis of the relationship between the L-box test and the yield stress of fresh concrete: an analytical approach Adv. Cem. Res. (IF 2.0) Pub Date : 2023-05-19 Raoudha Sassi, Ahmed Jelidi, Sami Montassar
The objective of this work was to study fresh concrete flow in the L-box test, predict the final deposit shape after flow stoppage and estimate the yield stress. This is very useful for controlling concrete casting in real structures, detecting problems and developing solutions on time. Concrete rheometers used for measuring the rheological parameters of concrete are expensive, not always available
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Time-dependent viscous behaviour of shear-thinning/shear-thickening cement pastes Adv. Cem. Res. (IF 2.0) Pub Date : 2023-05-17 Francisco José Rubio-Hernández, Luis Fernando Naranjo-Herrera, Nicolás Marcelo Páez-Flor, José Francisco Velázquez-Navarro
According to what is extensively and logically assumed, a better anti-thixotropic behaviour than thixotropy was expected for shear-thickening cement pastes. However, the shear-thickening Portland and volcanic cement pastes studied here showed apparent thixotropic behaviour when step-up tests were performed. This unexpected result was tentatively justified assuming that, just at the beginning of the
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AFt/AFm distribution and microstructural properties of thermally cured concretes containing rice husk ash Adv. Cem. Res. (IF 2.0) Pub Date : 2023-05-09 Nicole Pagan Hasparyk, Sandro Marden Torres, Francieli Tiecher, Guilherme Amantino, Wesley Maciel de Souza
The behaviour of concretes with and without rice husk ash was experimentally investigated with respect to the susceptibility to delayed ettringite formation. Concrete specimens have previously undergone a specific initial thermal curing up to 85°C, which was designed to trigger delayed ettringite formation. Specimens were subsequently exposed to a specific exposure environment by water immersion at
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Features of immittance spectra as performance indicators for cement-based concretes Adv. Cem. Res. (IF 2.0) Pub Date : 2023-04-11 W. John McCarter, Benny Suryanto, Hussameldin Taha Abdalgadir, Gerry Starrs, Jaehwan Kim
Design for durability and performance-based standards and specifications for reinforced concrete infrastructure is limited by the lack of rapid, science-based test methods for characterising the deterioration resistance of concrete. In this paper, this issue is addressed though the application of two-point electrical impedance measurements taken within the frequency range 100 Hz–10 MHz. Data are presented
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Production and evaluation of alkali-activated binders of low-calcium fly ash with slag replacement Adv. Cem. Res. (IF 2.0) Pub Date : 2023-03-31 K. Chiranjeevi Reddy, Kolluru V. L. Subramaniam
Formulating alkali-activated binders requires a clear understanding of the role of activator concentration and source material composition on product formation and strength gain. Alkali activation of a low-calcium fly ash (FA) binder with slag replacements at 30% and 50% by mass was evaluated. The reactivity and compressive strength gain of the activated binders were evaluated using activating solutions
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Expansion of concrete by secondary ettringite formation due to fine recycled aggregates contaminated with gypsum Adv. Cem. Res. (IF 2.0) Pub Date : 2023-03-09 Charlotte Colman, David Bulteel, Bouarroudj Mohamed Elkarim, Sébastien Rémond, Luc Courard
Recycled aggregates, especially the fine (0–4 mm) fraction, are often contaminated with sulfates coming from gypsum residues on demolition sites. When these aggregates are used in concrete, the sulfates can induce internal sulfate attack which causes expansion of the concrete. European standard EN 206:2013 sets the water-soluble sulfate limit at 0.2% by weight of the aggregate, but other studies suggest
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Preparation of sustained-release-type citric-acid-intercalated hydrotalcite and its application in oil-well cement Adv. Cem. Res. (IF 2.0) Pub Date : 2023-02-28 Tianpeng Zuo, Sheng Huang, Chunmei Zhang, Tao Gu, Kaiqiang Liu, Xiaowei Cheng
To address the problems of poor thermal stability and over-retarding of cement slurry by retarders, as well as the sensitivity to citric acid (CA) dosage and poor early strength of cement treated with hydroxycarboxylic acid retarders, CA-intercalated magnesium aluminium hydrotalcite (Mg/Al-CA-LDH, henceforth called CAIH) with a sustained-release effect was prepared by an anion exchange reaction between
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Investigation of the performance of basic magnesium sulfate cement mortar Adv. Cem. Res. (IF 2.0) Pub Date : 2023-02-21 Xun Xu, Yingjiang Li, Yongtao Sun, Bo Yu, Hailong Hu, Dan Li, Zongyue Hu, Shuang Wang, Jie Meng, Bowen Yu
Basic magnesium sulfate cement (BMSC) is a kind of magnesium oxide (MgO)–magnesium sulfate (MgSO4)–water (H2O) modified ternary cementitious material prepared from light burned magnesia, magnesium sulfate heptahydrate, water and additives. The effects of α-magnesium oxide/magnesium sulfate ratio (MO/MS), water/magnesium sulfate ratio (W/MS), sand-to-binder ratio (s/b) and superplasticiser dosage (SPD)
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Influence of steel fibre on bending behaviours of RPC based on X-ray CT and mesoscopic numerical simulation Adv. Cem. Res. (IF 2.0) Pub Date : 2023-02-16 Juan Lu, Yafang Zhang, Qingxuan Wang, Yongjie Huo
The mechanical properties and fracture mechanism of quasi-brittle materials are considered to be largely reliant on the mechanical properties of meso-components and the structure formed when these components are combined. In recent numerical simulation practice, a trend has developed whereby the real structure of materials is considered in as accurate a way as possible. In this paper, the macroscopic
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Effect of fine aggregate on fluidity and mechanical properties of wet shotcrete Adv. Cem. Res. (IF 2.0) Pub Date : 2023-02-07 Lianjun Chen, Jiahao Sun, Guoming Liu, Chunkui Li
Air-entrained wet shotcrete improves the pipeline transportation efficiency of concrete. The characteristics of the fine aggregate in the mix have different effects on the fluidity and mechanical properties of air-entrained wet shotcrete. The effects of four different properties of fine aggregates (mud content, sand ratio, water content and particle size) on the fluidity and mechanical properties of
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Effect of temperature on carbon dioxide mineralisation in recycled cement paste Adv. Cem. Res. (IF 2.0) Pub Date : 2023-01-31 Maciej Zajac, Magdalena Król, Frank Bullerjahn, Jan Deja
In this work, an approach towards a carbon-neutral cement industry using carbon dioxide mineralisation of recycled concrete paste is investigated. It focuses on the effect of temperature on the enforced carbonation of cement paste. The enforced carbonation is a rapid process at ambient temperature, which is further accelerated at elevated temperatures. Moreover, the extent of the reaction is increased
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Hydration activity and expansibility of different divalent metal oxide solution compositions in steel slag Adv. Cem. Res. (IF 2.0) Pub Date : 2023-01-31 Xin Zhao, Jiwei Hou, Zhimin Chen, Jiaxiang Liu
Steel slag (SS) accounts for 15–20% of steelmaking output; its application in cement concrete has been limited because of poor stability. In this study, the divalent metal oxide solid solution (RO phase) in SS was analogue synthesised to study its hydration activity and expansibility. The results showed that the hydration activity and expansibility of magnesium oxide (MgO) in the analogue-RO phase
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Phase volumes of ultra high performance concrete containing nanoscale pozzolan Adv. Cem. Res. (IF 2.0) Pub Date : 2023-01-30 Arjan Korpa, Nikolla Dhamo, Adelaida Andoni, Christian Pritzel
Grid nanoindentation and quantitative X-ray diffraction are employed to provide quantitative information on phase constituents of nanoscale pozzolan-containing ultra-high-performance concrete (UHPC). Three UHPC samples containing nanoscale pozzolan and cured with and without microwave energy are investigated. The volume fraction of each phase constituent is independently evaluated using both techniques:
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Synthesis of polycarboxylate superplasticiser modified by self-made functional monomer for improving clay tolerance Adv. Cem. Res. (IF 2.0) Pub Date : 2023-01-23 Guangyang Wang, Yuanming Song
Polycarboxylate superplasticisers (PCEs) are commonly sensitive to clay minerals. In this work, several clay-resistant PCEs (CR-PCEs) were synthesised using a novel self-made functional monomer (FM). The FM and the resulting superplasticisers were characterised by Fourier transform infrared spectrophotometry and gel permeation chromatography. The results showed that the CR-PCEs exhibited better dispersion
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Life cycle assessment and shrinkage properties of high performance mortars incorporating synthetic wollastonite microfibers Adv. Cem. Res. (IF 2.0) Pub Date : 2023-01-20 Hatice Öznur Öz, Muhammet Güneş, Hasan Erhan Yücel, Orkun Ersoy, Yunus Sever, Sevgi Demirel
In this study, the use of an alternative material as supplementary cementitious material was researched for the design of high-performance mortars (HPMs). Synthetic wollastonite microfibres (SWMs) were produced from calcite and quartz sand. The SWMs were then replaced at ratios of 0, 3, 6, 9 and 12% by cement weight to investigate the fresh, mechanical and shrinkage properties of HPMs. Test results
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Shrinkage of high-strength engineered cementitious composite with zeolite particles as internal curing agent Adv. Cem. Res. (IF 2.0) Pub Date : 2023-01-16 Qing Wang, Wenjie Huang, Jing Sun, Jun Zhang
The shrinkage and internal relative humidity (RH) of internally cured high-strength engineered cementitious composites (HSECCs) based on ordinary Portland cement (OPC) were experimentally investigated. Natural zeolite and calcined zeolite particles were used as internal curing agents. The effect of calcination and substitution ratio of zeolite on the shrinkage reduction efficiency and the compressive
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Effect of alkali sulfates in clinker on hydration and hardening properties of cement incorporating SCMs Adv. Cem. Res. (IF 2.0) Pub Date : 2023-01-10 Ying Ma, Jueshi Qian
Fly ash and slag are widely used in cement production. The effect of alkali sulfates in clinker on hydration and hardening of cement blended with fly ash and slag is studied. The results of hydration heat evolution, hydrates analysis and mechanical properties indicate arcanite (K2SO4), thenardite (Na2SO4), aphthitalite (3K2SO4·Na2SO4, K3NS4) and Ca-langbeinite (K2SO4·2CaSO4, KC2S3) in clinker could
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Effect of temperature on CO2 mineralization in recycled cement paste Adv. Cem. Res. (IF 2.0) Pub Date : 2023-01-09 Maciej Zajac, Magdalena Król, Frank Bullerjahn, Jan Deja
In the work, an approach towards a carbon-neutral cement industry using CO2 mineralization of recycled concrete paste is investigated. It focuses on the effect of temperature on the enforced carbonation of cement paste. The enforced carbonation is a rapid process at ambient temperature, which is further accelerated at elevated temperatures. Moreover, the extend of the reaction is increased when the
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Corrosion of ordinary Portland cement and metakaolin-based geopolymer immersed in nitric acid solution Adv. Cem. Res. (IF 2.0) Pub Date : 2022-12-13 Qifeng Lyu, Anguo Chen, Pengfei Dai
Preventing the corrosion of cementitious materials in acidic environments is crucial for the safety and durability of infrastructure. The corrosion of specimens of ordinary Portland cement (OPC) and metakaolin-based geopolymer (MKG) in 1 mol/l nitric acid solution was investigated in this work. The changes in morphology, mass, compressive strength, pH, chemical composition, crystal phases and pores
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Properties and microstructure of blended cement containing activated iron tailings powder Adv. Cem. Res. (IF 2.0) Pub Date : 2022-11-28 Bao Liu, Haining Meng, Ganghua Pan, Dongxu Li
To solve the environmental problem of iron tailings, the preparation of green binding materials using iron tailings powder (ITP) shows bright prospects. However, the low activity of ITP limits its use as supplementary cementitious materials in large amounts. In this work, the activity of ITP treated for different milling times and at different sintering temperatures was studied, as well as the effects