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Effects of polycarboxylate architecture on flow behaviour of cement paste Adv. Cem. Res. (IF 1.576) Pub Date : 2021-02-17 Xiumei Wang; Yong Yang; Xin Shu; Qianping Ran; Jiaping Liu
The effect of polycarboxylate superplasticiser (PCS) architecture in terms of a flexible or rigid backbone and repartition of side-chains along the backbone on the hydrodynamic radius, adsorption properties, flow behaviour and rheological behaviour was systematically evaluated. PCSs with different architectures were found to affect the flow behaviour of cement paste differently, mainly due to difference
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Understanding the aqueous phases of alkali-activated slag paste under water curing Adv. Cem. Res. (IF 1.576) Pub Date : 2021-02-17 Xiaohong Zhu; Mingtao Zhang; Yong Yang; Kai Yang; Fang Wu; Qing Li; Linwen Yu; Changhui Yang; Muhammed Basheer
The chemical compositions of the aqueous phases in alkali-activated slag (AAS) paste and Portland cement (PC) paste were determined up to 28 d with the aim of obtaining a better understanding of the stability of the hydration products in the two binder systems. The saturation levels with respect to the hydration products of PC and AAS were obtained by thermodynamic modelling. The main findings of this
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Thermo-physical, mechanical and microstructural properties of cementless lightweight mortar Adv. Cem. Res. (IF 1.576) Pub Date : 2021-02-17 Khalifa Al-Jabri; Hamada Shoukry; Mahmoud M. Mokhtar; Mohamed S. Morsy
In this work, an eco-friendly lightweight cementless mortar has been prepared primarily from natural resources and industrial solid wastes. Lime–silica fume (lime–SF) paste (1 : 1 wt) was used as a green binder in lieu of cement. The binder was combined with expanded perlite (EP) aggregate with various aggregate volume contents of 25, 50 and 75%. The compressive strength, indirect tensile strength
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Influence of sodium chloride on the hydration of calcium aluminate cement constantly cured at 5, 20 and 40°C Adv. Cem. Res. (IF 1.576) Pub Date : 2021-02-17 Zhongping Wang; Yating Zhao; Haoyu Yang; Long Zhou; Guizhi Diao; Guanghua Liu; Linglin Xu
The influence of sodium chloride (NaCl) on the hydration evolution of calcium aluminate cement (CAC) cured at 5°C, 20°C and 40°C was investigated by calorimetry, X-ray diffraction, differential scanning calorimetry–thermogravimetry, scanning electron microscopy and mercury intrusion porosimetry. The chloride binding capacity and compressive strength of the CAC were also determined. The results showed
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Study of the reaction stages of alkali-activated cementitious materials using microcalorimetry Adv. Cem. Res. (IF 1.576) Pub Date : 2021-01-22 Ary Alain Hoyos-Montilla; Francisca Puertas; Jorge Ivan Tobón
The roles of sodium hydroxide, calcium hydroxide and temperature on heat flow evolution and its relation to the reaction stages of alkali-activated coal fly ash were evaluated. The response surface method was used to analyse data. Both the heat flow and kinetic parameters were determined by the deconvolution of microcalorimetric signals at 25, 35 and 45°C. The studied factors were found to have a strong
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Early hydration of CSA cement modified with styrene–butadiene copolymer dispersion Adv. Cem. Res. (IF 1.576) Pub Date : 2021-01-22 Lin Li; Ru Wang
The effect of styrene–butadiene copolymer (SB) dispersion on the early hydration of calcium sulfoaluminate (CSA) cement was investigated. Pastes with five different ratios (0, 5, 10, 15 and 20%) of SB to CSA cement at a constant water to cement ratio of 0·4 were investigated by ultrasonic measurements, isothermal calorimetry, X-ray diffraction, thermogravimetry and scanning electron microscopy. It
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Effect of red mud addition on oil well cement at high temperatures Adv. Cem. Res. (IF 1.576) Pub Date : 2021-01-22 Xiaowei Cheng; Xuezheng Yang; Chi Zhang; Xianshu Gao; Yongjin Yu; Kaiyuan Mei; Xiaoyang Guo; Chunmei Zhang
Red mud is a byproduct of the aluminium industry and is typically considered hazardous waste owing to its high alkali content and resulting environmental pollution. In this work, Bayer process red mud was used to partially replace oil well cement and its influence on the compressive strength of hardened cement pastes was explored under hydrothermal conditions. X-ray diffraction, scanning electron microscopy
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Research on the effectiveness of polycarboxylate superplasticisers with different side-chain lengths Adv. Cem. Res. (IF 1.576) Pub Date : 2021-01-22 Xi-qin Chen; Xu Cheng; Xiao-dong Wen; Jun Xun; Yu-feng Shen
Polycarboxylate superplasticiser (PCSs) are commonly used and studies to enhance their compatibility with other concrete raw materials have been undertaken. However, the effect of the side-chain length (SCL) in PCSs on the properties of cement-based materials (CBMs) has not gained enough attention. To fill this research gap, five types of PCSs with different SCLs were synthesised through a redox initiator
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Durability of silica aerogel cementitious composites – freeze–thaw resistance, water resistance and drying shrinkage Adv. Cem. Res. (IF 1.576) Pub Date : 2020-12-21 Pinghua Zhu; Shuqi Yu; Cheng Cheng; Shanyu Zhao; Haixun Xu
Owing to its exceptional physical properties, silica aerogel is regarded as an attractive candidate material for building insulation applications; however, the widespread adoption of silica aerogel is limited by its inherently brittle nature and related sub-micrometre dust release. In this paper, the poor mechanical properties of silica aerogel were improved by combining the silica phase and cementitious
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Mitigation of the potential alkali–silica reaction of FNS using ground FNS as a supplementary binder Adv. Cem. Res. (IF 1.576) Pub Date : 2020-12-21 Ashish Kumer Saha; Prabir Kumar Sarker
Alkali–silica reactivity of granulated ferronickel slag (FNS) aggregate was evaluated by accelerated mortar bar tests. The test results showed noticeable expansions of the samples containing 50% FNS aggregate due to potential alkali–silica reaction (ASR). On the other hand, finely ground FNS (GFNS) exhibited pozzolanic property in the studies of compressive strength development, thermogravimetric analysis
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Performance of low amorphous silica fly ashes in mortars Adv. Cem. Res. (IF 1.576) Pub Date : 2020-12-21 Amarpreet Kaur; Sreejith Krishnan; Shashank Bishnoi
Fly ash based cements remain the most consumed pozzolanic cement in developing countries like India. However, despite such high demand, only 60% of the fly ash generated in India is consumed. One of the major reasons for this under-utilisation appears to be the lower quality of Indian fly ashes compared with fly ash generated elsewhere. Fly ashes produced in Indian power plants are generally low-calcium
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Strength and hydration attributes of cement pastes containing nano titania and cenosphere Adv. Cem. Res. (IF 1.576) Pub Date : 2020-12-21 Asad Hanif; Zeyu Lu; Pavithra Parthasarathy; Dongshuai Hou; Zongjin Li; Guoxing Sun
An in-depth study of cementitious composites incorporating fly ash cenosphere (FAC) and varying amounts of nano titania (NT) was carried out to explore the potential usefulness of NT in formulating lightweight cementitious binders for structural and functional applications. Cement pastes with fixed weight fraction (50%) of FAC, and varying amounts of NT (1·5–4·5 wt%) were prepared, keeping a fixed
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Performance of limestone calcined clay blended cement-based concrete against carbonation Adv. Cem. Res. (IF 1.576) Pub Date : 2020-11-02 Mohammad S. H. Khan; Quang Dieu Nguyen; Arnaud Castel
The aim of this work is to investigate the carbonation resistance of limestone and calcined clay blended cement-based concrete. Two limestone and calcined clay concretes with an average 28 d compressive strength of about 36 MPa were considered. Limestone and calcined clay (with a ratio of 2 : 1) were blended with a general purpose (GP) cement. The GP cement substitution rates considered were 30% and
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Synthesis and performance of a series of novel low-molecular-weight superplasticisers with star-shaped phosphate frame Adv. Cem. Res. (IF 1.576) Pub Date : 2020-11-02 Shuai Qi; Tao Wang; Zheng Han; Shimin Fan; Jianfeng Ma; Yong Yang; Shuzhen Zheng; Qianping Ran
A new type of small-molecule phosphate superplasticiser (SP) was synthesised in one pot by the phosphorylation reaction of star-polyether with phosphoric acid. By varying the structure of the initiator polyamines, star-shaped small-molecule phosphate SPs with different molecular weights and anionic charge densities were prepared. The synthesised SPs were characterised by means of proton nuclear magnetic
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Effects of carbonation on carbon dioxide capture and the mechanical properties of concrete with amine sorbents Adv. Cem. Res. (IF 1.576) Pub Date : 2020-11-02 Seyeon Oa; Beom-Jun Kim; Jae-Woo Park
Carbon dioxide (CO2) uptake and the mechanical strength of concrete with and without carbon-dioxide-philic (CDP) amine sorbents were assessed in this study. Cement pastes with three amine-based sorbents (5-amino-1 pentanol, piperazine and 3-amino-1-propanesulfonic acid) were hydrated for 28 d. They were then assessed for carbon dioxide uptake and compressive/bending strength. The carbon dioxide in
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Effects of polycarboxylate superplasticisers with various functional groups on the pore structure of cement mortar Adv. Cem. Res. (IF 1.576) Pub Date : 2020-11-02 Yan He; Xiong Zhang; Wanling Hong; Liangliang Shui; Xiaofu Wang; Haoren Wang; Lei Peng
The air-entraining capabilities of polycarboxylate superplasticisers (PCEs) with different functional groups were systematically analysed. Using different molecular PCEs, the evolution process from bubbles in fresh cement mortar to pores in hardened cement mortar was investigated, considering their effects on mortar workability and mechanical performance. The results showed that PCEs with various functional
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Synthesis, characterisation and application of self-healing material in oil well cement for healing microcracks Adv. Cem. Res. (IF 1.576) Pub Date : 2020-11-02 Zhi-gang Peng; Chun-yang Yu; Qian Feng; Yong Zheng; Jin-hua Huo; Jia-rong Wu
Microcracks can occur in oil well cement, which can lead to regional isolation and casing corrosion or even serious damage to the well. Self-healing cement is therefore of great interest for oil well applications. In this work, a self-healing material (called YW) was prepared by catalytic synthesis of a double-proton acid and characterised by Fourier transform infrared spectroscopy. The self-healing
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Workability and microstructural properties of red-mud-based geopolymer with different particle sizes Adv. Cem. Res. (IF 1.576) Pub Date : 2020-10-08 Jian Zhang; Shucai Li; Zhaofeng Li; Yifan Gao; Chao Liu; Yanhai Qi
Red mud (RM) can be used in large quantities in geopolymer technology to reduce the usage of ordinary Portland cement products. The effect of varying the particle size of RM on the potential reacti...
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Effects of inert silica powder on the properties of magnesium oxysulfate cement Adv. Cem. Res. (IF 1.576) Pub Date : 2020-10-08 Na Zhang; Hongfa Yu; Haiyan Ma; Ting Liu; Chengyou Wu
The effects of silica powder (SP) with different fineness values on the properties of magnesium oxysulfate cement (MOSC) were compared with the effects of fly ash (FA). X-ray diffraction, mercury p...
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Performance improvement of cement paste loaded with MWCNT–magnetite nanocomposite Adv. Cem. Res. (IF 1.576) Pub Date : 2020-10-08 Siamak Imanian; Maisam Jalaly; Asghar Habibnejad Korayem; Ramezan Ali Taheri
The outstanding properties of carbon nanotubes (CNTs) mean they can be considered as potential components of high-performance cementitious composites. However, the major challenges of using CNTs in...
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Incorporation of zinc in calcium sulfoaluminate cement clinker Adv. Cem. Res. (IF 1.576) Pub Date : 2020-10-08 Joelle Kleib; Georges Aouad; Noura Khalil; Mirvat Zakhour
Several types of industrial wastes can be used as raw materials to obtain calcium sulfoaluminate (CSA) cement clinker. The first aim of this work was to define the maximum content of zinc that coul...
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Application of light-burnt dolomite as a mineral addition in concrete Adv. Cem. Res. (IF 1.576) Pub Date : 2020-09-09 Zhiyang Chen; Min Deng; Peng Liu
Growth in the production of cement has led to increasing demands for mineral additions. This study was conducted to develop an alternative addition by calcining dolomite at 800°C to obtain a mixture of periclase (MgO) and calcite (CaCO3). The light-burnt dolomite (LBD) was used to prepare blended cements. The hydration, setting time and microstructure of the cement were assessed and the compressive
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Effects of packing density and water film thickness on fresh and hardened properties of ternary cement pastes Adv. Cem. Res. (IF 1.576) Pub Date : 2020-09-09 Guillermina Marchetti; Edgardo Fabián Irassar; Viviana Fátima Rahhal
Optimisation of the packing density of cementitious materials by the addition of supplementary cementitious materials (SCMs) is a way of obtaining the same service properties with less embodied energy and reduced carbon dioxide emissions. In this paper, ternary cement pastes containing metakaolin (MK) and limestone filler (LF) finer than ordinary Portland cement (OPC) were studied to evaluate the effects
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Effect of chemical structure on dispersity of polycarboxylate superplasticiser in cement paste Adv. Cem. Res. (IF 1.576) Pub Date : 2020-09-09 Ke Kai; Yao Heng; Wang Yingbin
This study examines the mechanism of adsorption–dispersion by superplasticisers with varying side chain density in cement paste. Acrylic acid was used to copolymerise with 2-methylprop-2-ene polyethylene glycol, using chain transfer agent to synthesise polycarboxylate ether superplasticisers (PCEs) with comparable main chain lengths and different side chain densities. Gel permeation chromatography
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Behaviour changes of ground granulated blast furnace slag geopolymers at high temperature Adv. Cem. Res. (IF 1.576) Pub Date : 2020-09-09 Ikmal Hakem Aziz; Mohd Mustafa Al Bakri Abdullah; Cheng-Yong Heah; Yun-Ming Liew
In this paper, the thermal performance of ground-granulated blast furnace slag (GGBFS) geopolymers is investigated. The geopolymers were prepared with sodium-based alkali activator and exposed to elevated temperature (200 to 1000°C) after 28 d of curing at room temperature. The unexposed geopolymers exhibited excellent compressive strength of 95 MPa. The compressive strength reduced to 8·9 MPa at 800°C
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Effect of grinding on the quantification of bound water in tricalcium silicate Adv. Cem. Res. (IF 1.576) Pub Date : 2020-09-09 Shiju Joseph; Özlem Cizer
The effect of grinding hydrated tricalcium silicate (C3S) pastes on the bound water content (BWC) measured by thermogravimetric analysis was investigated. The samples were subjected to different curing regimes at 20°C and 40°C at a constant water to cement ratio of 0·5. Hydration reactions were stopped using a freeze drier. To study the effect of grinding, samples were either roughly crushed or finely
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Developing One-Part Alkali-Activated metakaolin/natural pozzolan Binders using Lime Waste as activation Agent Adv. Cem. Res. (IF 1.576) Pub Date : 2020-09-09 Abdullah Kadhim; Monower Sadique; Rafal Al-Mufti; Khalid Hashim
Among the several schemes that have been reported to be a satisfactory alternative to Portland cement is Alkali Activated Cement (AAC), which has recently started to gain greater consideration in construction sectors. Conventional two-part alkali activation has many drawbacks, including the activating solution being viscous, problematic and non-user friendly to handle. Thus, this research aims to produce
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Use of natural pozzolan in high-performance concrete for the Mombasa–Nairobi Railway Adv. Cem. Res. (IF 1.576) Pub Date : 2020-09-09 Jingliang Xia; Qingfeng Guan; Yongxiang Zhou; Jing Wang; Chao Gao; Yang He; Zuqi Wang; Putao Song
Because there is a shortage of high-quality fly ash (FA) in Kenya, to successfully build the Mombasa–Nairobi railway, the abundant natural pozzolan resources in the country need to be fully utilise...
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Optimizing the setting behavior of cement paste with poly(AANa-co-DMAA) in the presence of alkali-free accelerator Adv. Cem. Res. (IF 1.576) Pub Date : 2020-09-03 Xiaolei Zhang; Luping Zeng; Min Qiao; Wei Wang; Jian Chen; Jinxiang Hong; Qianping Ran
During the last decades, alkali-free accelerators have appeared on the market of set accelerator additives for shotcrete. In this work, copolymers poly (AANa-co-DMAA) with variation of their charge...
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Effect of mineral admixtures on the properties of grouting materials made from a ternary complex system Adv. Cem. Res. (IF 1.576) Pub Date : 2020-08-19 Xianjun Li; Jianying Hao; Qiang Zhang
Novel research on the preparation of grouting materials with a high volume of mineral admixtures is presented. The grouting materials were made from a ternary complex system containing sulfoaluminate cement, aluminate cement and gypsum. The maximum contents of fly ash (FA) and ultrafine slag (UFS) in the grouting materials only containing FA or UFS were 17 wt% and 23 wt%, respectively. It was found
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The sulfate degradation of cement incorporating carbonate by an electrical field at low temperature Adv. Cem. Res. (IF 1.576) Pub Date : 2020-08-19 Yaoling Luo; Chong Wang; Zheng Fang
Sulfate and carbonate can cause serious degradation of cement-based materials at low temperature; degradation products generally include ettringite, gypsum and thaumasite. The degradation process is very slow in a natural environment and no useful test method exists to accelerate the degradation process. This study used a voltage of 30 V and an electrical field duration of 20 s to study the acceleration
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Multifunctional cement composites with expanded graphite for temperature monitoring of buildings Adv. Cem. Res. (IF 1.576) Pub Date : 2020-08-19 Waldemar Pichór; Maksymilian Frąc
The results of research on cement composites with expanded graphite for application in temperature monitoring are presented. Two series of cement mortars were prepared with expanded graphite obtained from intercalated graphite by rapid heating at 500°C and 1000°C. The relation between temperature and electrical resistivity and the thermoelectric properties of the mortars with expanded graphite were
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Evaluation of elastic modulus of cement paste in sodium sulfate solution by an advanced X-CT–hydration–deterioration model with SC method Adv. Cem. Res. (IF 1.576) Pub Date : 2020-08-19 Yue Li; Zhongzheng Guan; Zigeng Wang; Guosheng Zhang; Qingjun Ding
The compositions and contents of phases in cement paste soaked in sodium sulfate solution changing with time were investigated in this study. First of all, the porosities in cement paste specimens over time were measured by an in situ X-ray computed tomography (X-ray CT) test. Cement hydration and sulfate erosion occur simultaneously during the soaking process of cement paste specimens in sodium sulfate
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Comparison of chemical properties of pore solution of hardened cement pastes containing mineral additions Adv. Cem. Res. (IF 1.576) Pub Date : 2020-08-19 Rachid Cherif; Ameur El Amine Hamami; Abdelkarim Aït-Mokhtar; Rafat Siddique
This paper presents the influence of mineral additions in blended cement or ‘green’ concrete, on the divalent ions of the cement paste pore solution. Because of the lack of data concerning the dire...
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A new approach for evaluating the chloride ion penetration of cement mortar in cold environments Adv. Cem. Res. (IF 1.576) Pub Date : 2020-08-06 Shuai Bai; Xinchun Guan
The aim of this paper was to use the surface fractal dimension (Ds) to evaluate the chloride ion penetration of cement mortar in extremely cold regions. Pore structure is a critical factor that inf...
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Effect of Ti on crystal transition and solid solution characteristics of white Portland cement clinker Adv. Cem. Res. (IF 1.576) Pub Date : 2020-08-06 Jinzhen Li; Geling Cheng; Shaowen Huang; Lei Huang
Ti is a common trace element in white Portland cement clinker. Ti4+ generally replaces Si4+ to form a solid solution in silicate mineral, which has an important influence on the mineral crystal for...
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Erosion of aerial lime and sticky rice mortars by cyclic wetting–drying and dilute sulfate acid actions Adv. Cem. Res. (IF 1.576) Pub Date : 2020-07-15 Qi Zhang; Beibei Li; Qiang Zeng; Jiahua Deng; Jiyang Wang; Dongmin Yan
Lime mortar with organic additives is one of the most widely used building materials in ancient China and continues to play an important role in historic structure restoration. This study investigated the erosion of ordinary aerial lime and sticky-rice mortars under the cyclic actions of wetting–drying (WD) and dilute sulfate acid (DSA). Comprehensive experimental tests were conducted to study the
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Thermal behaviour of PPC and OPC-53 when exposed to extreme temperatures Adv. Cem. Res. (IF 1.576) Pub Date : 2020-07-15 Harsha Praneeth Pavani; Tezeswi Tadepalli; Ashish Kumar Agrawal
Portland pozzolana cement (PPC) and ordinary Portland cement (OPC) OPC-53 grades of cement are commonly used in India. The thermal responses of these types of Portland cement (PC) differed upon analysing the compressive strengths of their hydrated cement block specimens at elevated temperatures. At 800°C, PPC was able to maintain the integrity of the cube, while OPC-53 failed to do so at 500°C. Thermal
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Long-term mechanical properties and micro mechanism of magnesium oxychloride cement concrete Adv. Cem. Res. (IF 1.576) Pub Date : 2020-07-15 Chenggong Chang; Jinmei Dong; Xueying Xiao; Weixin Zheng; Jing Wen; Ying Li; Qing Huang; Yangyang Man
According to the C20 Portland cement concrete (PCC) batching standard, magnesium oxychloride cement concrete (MOCC) is made using bischofite from salt lakes and light-burned magnesium oxide as the main raw materials. In this work, the mechanical properties of MOCC (setting time and compressive and flexural strengths) were tested. The rules governing the phase composition and microstructure changes
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Investigation on the properties of magnesium oxychloride cement prepared with seawater Adv. Cem. Res. (IF 1.576) Pub Date : 2020-07-15 Qing Huang; Ying Li; Weixin Zheng; Jing Wen; Chenggong Chang; Jinmei Dong; Yangyang Man; Dunchun A; Xueying Xiao; Yuan Zhou
Seawater from South China Sea was used instead of freshwater to fabricate magnesium oxychloride cement (MOC). To study the basic performance of the seawater-mixed MOC paste, the setting time, hydration exothermic characteristics, compressive strength, thermal stability, seawater resistance, phase composition and microstructure of the paste were analysed in detail. The results showed that the use of
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Early Age Shrinkage of Cement Pastes Adv. Cem. Res. (IF 1.576) Pub Date : 2020-07-01 Mariana dos Santos Motta; Lourdes Maria Silva de Souza; Flávio de Andrade Silva
The aim of this research was to investigate the effect of the addition of discrete polypropylene fibres (PPF) and curaua fibres (CF) on the early-age autogenous and drying shrinkage of cement paste...
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Early formation of belite in cement clinker raw materials with slag Adv. Cem. Res. (IF 1.576) Pub Date : 2020-07-01 Erik Viggh; Matias Eriksson; Bodil Wilhelmsson; Rainer Backman
This work investigates analytical methods for characterizing cement raw meal during heating in different atmospheres. The effect of replacing limestone with 10 wt% slag on the formation of incipien...
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Influence of high volume limestone powder on hydration and microstructural development of cement Adv. Cem. Res. (IF 1.576) Pub Date : 2020-07-01 Pengfei Zhu; Guohui Yang; Linhua Jiang; Yanran Shi; Ning Xu; Ming Jin; Yue Gu
Limestone powder has been widely used in concrete structures because of its easy availability and positive effect on reducing the heat of hydration. The addition of limestone powder has a significa...
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Prediction of carbonation using reactivity test methods for pozzolanic materials Adv. Cem. Res. (IF 1.576) Pub Date : 2020-06-17 Vineet Shah; Anuj Parashar; Satya Medepalli; Shashank Bishnoi
The influence of the capacity of supplementary cementitious materials (SCMs) to consume portlandite on the carbonation resistance of mortar was investigated. Seven different mineral additives (two types of slag, two types of fly ash, two calcined clays and limestone) were used and their reactivity was measured using isothermal calorimetry, strength index measurements, Chapelle's test and thermogravimetric
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Synthesis of core–shell soap-free emulsion and evaluation of its performance in oil-well cement Adv. Cem. Res. (IF 1.576) Pub Date : 2020-06-17 Zhi-gang Peng; Jia-rong Wu; Qian Feng; Jian Zhang; Bo-jian Zhang
A soap-free latex (XY-5) was prepared by means of a soap-free emulsion free-radical polymerisation method, using the synthetic polymer P (BA/AANa) as an emulsifier and butyl acrylate (BA), styrene and methyl methacrylate as monomers. The stability, thermal stability and microstructure of the XY-5 emulsion were studied using various methods, including viscosity analysis, zeta potential measurement,
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Investigation of the effect of consolidation on cement flow behaviour Adv. Cem. Res. (IF 1.576) Pub Date : 2020-06-17 Djamel Turki; Messaoud Saidani; El-habib Belarbi; Nouria Fatah
One of the main problems affecting the flow of cement bulk powder is the formation of cohesive arching at the outlet of the hopper, causing blockage of the silo opening and bridge formation. A simple concept is established which outlines these complications. In this context, the interactions of particles lead to a high degree of consolidation of the cement powder and an increase of adhesion force due
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Effect of pH value on the growth and properties of magnesium phosphate cement paste with a large water-to-solid fraction Adv. Cem. Res. (IF 1.576) Pub Date : 2020-06-17 Mengtian Li; Xiao Zhang; Bin Han; Dong Tian
In this study, the effect of pH value, a neglected but important factor of magnesium phosphate cement (MPC) pastes, was investigated to generate new ideas in the field of large water-to-solid (w/s) fraction MPC preparation. To avoid the introduction of impurities, the pH value was controlled by adjusting the proportions of diammonium hydrogen phosphate (DAP) and ammonium dihydrogen phosphate (ADP)
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Performance of cement asphalt mortar with nanomaterials Adv. Cem. Res. (IF 1.576) Pub Date : 2020-06-17 Xi Wu; Xing-Lang Fan; Jia-Fei Jiang
Deterioration of the cement asphalt mortar (CAM) cushion in non-ballast slab track can decrease the safety of high-speed railway lines in service. The improvement in the performance of CAM due to the addition of nanosilica was investigated in this study. The workability, mechanical properties and fatigue behaviour of CAM with nanosilica were determined and compared to those of CAM without nanosilica
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Chemical-physical-mechanical stability of MKG mortars under sulfate attacks Adv. Cem. Res. (IF 1.576) Pub Date : 2020-06-16 Dongming Yan; Shikun Chen; Jiangchuxiong Jin; Xiuyu Zhu; Jiyang Wang; Qiang Zeng
Geopolymer-based materials have attracted increasing interest in construction and infrastructure engineering due to their high mechanical properties but low carbon dioxide emissions. However, it re...
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Characterisation of water stability of magnesium phosphate cement blended with steel slag and fly ash Adv. Cem. Res. (IF 1.576) Pub Date : 2020-04-30 Dandan Sun; Kai Wu; Wang Kang; Huisheng Shi; Shaolin Li
The instability of magnesium phosphate cement (MPC) in moist environments limits its application. In the work reported in this paper, the residual strength and length evolution of MPCs under various curing conditions were investigated to assess the effect of steel slag and fly ash on the stability of MPC. The microstructure of hardened MPC was analysed using X-ray diffraction, scanning electron microscopy
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The method of repairing microcracks based on microbiologically induced calcium carbonate precipitation Adv. Cem. Res. (IF 1.576) Pub Date : 2020-04-30 Xiaohao Sun; Linchang Miao; Linyu Wu; Chengcheng Wang; Runfa Chen
Cracks will affect the service life of concrete, even if they are small ones. A crack healing method based on biomineralisation is presented to repair microcracks in concrete specimens. By analysing the change in permeability, adopting two different ultrasonic detection methods, and conducting unconfined compressive strength tests, scanning electron microscopy and X-ray diffraction tests, this method
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Cement–rock interaction in geothermal wells at high temperatures Adv. Cem. Res. (IF 1.576) Pub Date : 2020-04-30 João Silva; Neil B. Milestone
The lifetime of a geothermal well is strongly dependent on the long-term performance of the cement used for its construction. The critical zones in well cements are the outermost layers, where the cement encounters either the steel casing or the rock formation. The current paper presents a study of the changes in the interfacial transition zone that forms between geothermal cements and volcanic rocks
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Effect of synthesis conditions and post-synthetic treatments of LiAl-LDH on the performance of sulfoaluminate cement Adv. Cem. Res. (IF 1.576) Pub Date : 2020-04-30 Haiyan Li; Chi Xu; Xuemao Guan; Haibo Zhang
LiAl-layered double hydroxide (LiAl-LDH) has been reported as a potential hardening accelerator of calcium sulfoaluminate (CSA) cement. Until now, little has been known about the effect of synthesis conditions and post-synthetic treatments of LiAl-LDH on the performance of CSA cement. The present work shows two methods for the synthesis of LiAl-LDH – a solvothermal method and a separate nucleation
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Hydration of a calcium sulfoaluminate cement blended with zincite Adv. Cem. Res. (IF 1.576) Pub Date : 2020-02-28 Gwenn Le Saoût; Dominique Lafon-Pham; Jean Claude Roux
A calcium sulfoaluminate (CSA) cement has been characterised by X-ray diffraction and energy-dispersive X-ray spectroscopy analysis. Selective extraction methods have been used to improve detection...
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Thermal behavior of ladle slag mortars containing ferrochrome slag aggregates Adv. Cem. Res. (IF 1.576) Pub Date : 2020-02-20 Elijah Adesanya; Marjaana Karhu; Arnold Ismailov; Katja Ohenoja; Paivo Kinnunen; Mirja Illikainen
Concretes, depending on their application, may be exposed to elevated temperatures during their lifetime, especially when placed near or in a furnace or during an accidental fire. The thermal stabi...
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Preparation and Properties of Alite Modified Calcium Sulfoaluminate Cement Adv. Cem. Res. (IF 1.576) Pub Date : 2020-01-29 Peng Du; Xumin Li; Zonghui Zhou; Xiaolei Lu; Xiuzhi Zhang; Dongyu Xu; Xin Cheng
Calcium sulfoaluminate cement (CSA) has the characteristics of rapid hardening, high early strength, high corrosion resistance and high impermeability, but its ability to continue to show strength ...
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CO2-activated bonding material with low water demand Adv. Cem. Res. (IF 1.576) Pub Date : 2020-01-29 Songhui Liu; Haibo Zhang; Yuli Wang; Mifeng Gou
The production of concrete based on Portland cement consumes huge amounts of water every year, but water conservation is becoming a global concern. To address this issue, a special bonding material...
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Influence of carbonation on chloride penetration of pastes under cyclic wet-dry condition Adv. Cem. Res. (IF 1.576) Pub Date : 2019-12-05 Honglei Chang; Jian Liu; Sen Cheng; Xuan Zhang
Under a cyclic wetting–drying chloride attack environment, carbonation is of great significance for chloride transport. In this work the impact of carbonation on the chloride penetration rate was i...
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Temperature and age effects on mechanical behavior of phosphorus slag-based concrete Adv. Cem. Res. (IF 1.576) Pub Date : 2019-12-05 Sherong Zhang; Kelei Cao; Chao Wang; Andong Zhu; Xiaohua Wang; Chao Shang
A novel phosphorus slag-based concrete is illustrated and provided in the paper with the aim of investigating experimentally the water temperature and age effects on its mechanical behaviour. The c...
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Thermal Activation Mechanism and Pozzolanic Activity Characteristics of Coal Flotation Tailing Adv. Cem. Res. (IF 1.576) Pub Date : 2019-09-06 Dongxue Liu; Yang Huang; Junyang Hu; Qiming Feng; Junhui Xiao
Coal flotation tailings (CFT) was calcined to be used as a supplementary cementing material. CFT and its calcined products were characterised by thermogravimetric analysis (TGA), X-ray diffraction ...
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