... 10 30 10BRR 20GGBS 70 10 0 20 30 20BRR 15GGBS 65 20 0 15 35 15BRR 20GGBS 65 15 0 20 35 bauxite refinery residue cement cement paste cementitious materials compressive strength eco-friendly cement hydration products material characterisation supplementary...

... rates exceeded 40% (Li and Chen, 2013). Because of this disagreement in the literature, a wide range was studied in this paper (20, 40, and 60% replacement). cement paste fly ash magnesium phosphate cement phosphate cements special cements viscosity Magnesium phosphate cement (MPC...

...-based composites was confirmed. 13 09 2024 19 02 2025 Emerald Publishing Limited: All rights reserved 2025 calcium carbonate cement cementitious materials cement paste compressive strength heavy metals The massive arrival of Sargassum spp. on the coasts...

...Kun Liang; Jinkun Su; Yupeng Zhang It is not easy to test the absorption of water from cement paste by porous aggregates, because the cement paste attached to the aggregates is difficult to remove when the water content of the aggregates is to be evaluated. A novel method to test the water...

... debonding energy remained nearly unchanged. The effects of various concentrations of EA on the strength of cement pastes containing various lengths and volume fractions of CF were then investigated. The results indicated that, benefitting from the EA-induced high interfacial bond strength, the flexural...

...Liangyuan Xie; Lin Liu; Guanghui Tao This paper investigates the influence of pore structure on the chloride diffusivity of cement pastes. A quantitative relationship between pore structure parameters (i.e. pore diameter, porosity, constrictivity and tortuosity) and the diffusivity of cement paste...

... 2023 cement paste composite materials compressive strength Concrete is the most widely used building material in underwater projects, and its underwater pouring performance directly affects the construction quality and service life of underwater projects (ACI, 2005 ; Park et al...

...: acceleration period, deceleration period and stability period. With the increase of W/C, the maximum heat release rate of cement decreases, while the cumulative heat release increases. In addition, increasing W/C can affect the microstructure of the cement paste, increase the porosity and further decrease...

...Zhongzhe Zhang; Yongsheng Ji; Zhanguo Ma; Ou Geng; Furong Gao; Jie Zhang; Zhishan Xu; Mengzhen Wu In this study, dehydrated cement paste (DCP) was used as a calcium source and solid dispersant for alkali-activated coal gangue (CG). The reaction mechanism of alkali-activated CG-DCP was revealed...

...M. H. N. Yio; Y. W. Ho; F. Abdul Wahid; H. S. Wong; N. R. Buenfeld A new method for determining the cement paste, fine aggregate and coarse aggregate content of hardened concrete using micro X-ray fluorescence (μXRF) is presented. The method involves mathematical and morphological operations...

... undergoing 1500 F–T cycles. More micropores gradually form, converge and connect, and the volume fraction of micropores increases up to about 120%. The interfacial transition zone (ITZ) between steel fibre and cement paste is more prone to act as the weakest zone than that between fine sand and cement paste...

... of tricalcium aluminate but could hinder the hydration of tricalcium silicate in both PC and HVFA pastes with 60% and 70% FA. 04 03 2020 26 08 2020 01 09 2020 ICE Publishing: All rights reserved 2020 admixtures cement paste compressive strength Use of fly ash (FA...

...) in concrete mix design could enable a reduction in paste (cement) content and improve the properties of fresh concrete. With optimised aggregate gradation, the shrinkage and durability of designed concretes made with OPC can be improved (Alexander, 1996). The use of BA along with a reduction in cement paste...

... absorption. The method was found to enhance the performance of RFAM remarkably and, in addition, is economically and environmentally feasible. 05 06 2019 03 10 2019 16 10 2019 RFA sourced from concrete wastes comprise cement paste and natural aggregates. The surface of RFA is covered...

.... It is solidified to form a hard cement paste by hydration of the cement. However, different raw materials not only affect the setting time and workability of the cement paste, but also change the microstructure and pore size distribution of the hardened concrete, which is directly related to the strength...

..., degree of hydration and setting time. This is probably due to improved particle packing, access to more nucleation sites for the hydration products and the formation of calcium carbo-aluminate hydrates. Scanning electron micrographs of coarse ground cement paste also indicate a retarded degree...

... pressures. Furthermore, to separate the influence of aggregates on porosity, hardened cement paste and mortar samples of otherwise similar composition were prepared. All samples were tested with single-sided ¹H NMR, allowing depth-resolved porosity profiles of up to 18 mm. Differences...

... of a triple-layered interfacial transition zone is suggested to be the main reason for the inferior mechanical properties exhibited by recycled aggregate (RA) concrete. Past research on the reactivation of hydrated cement paste and on improving the quality of RAs by the use of different treatments...

... agent (CEA) in CBMs and modelling of the same are discussed in this paper. Based on isothermal calorimetry and thermogravimetry/differential thermal analysis, the hydration behaviour of the CEA in cement paste was examined, based on which the hydration kinetics were analysed and the apparent hydration...

..., but the fire resistance and chemical composition of various OPC/CAC pastes are still not clear. The residual compressive strengths of binary cement pastes with various OPC/CAC ratios after fire exposure were studied in this work. The mineral composition and microstructure of the pastes were characterised by X...