Results 231 to 240 of about 552,793 (295)

Macro–meso–micro experimental studies of calcined clay limestone cement (LC3) paste subjected to elevated temperature

Cement & Concrete Composites, 2021
In this study, the macro properties (residual compressive strength), meso properties (mesoscopic images), and micro properties (reaction products and pore structures) of paste specimens with various limestone and calcined clay contents at elevated ...
Runsheng Lin, Yi Han, Xiao-Yong Wang
semanticscholar   +1 more source

Comparative roles between aragonite and calcite calcium carbonate whiskers in the hydration and strength of cement paste

Cement & Concrete Composites, 2019
Aragonite CaCO3 whisker (CW) could improve the mechanical properties of cementitious composites. The microstructure of calcite is different from that of aragonite, but only a few studies reported different effects in cementitious composites between ...
Li Li, M. Cao, Hong Yin
semanticscholar   +1 more source

Design of 3D printable concrete based on the relationship between flowability of cement paste and optimum aggregate content

Cement & Concrete Composites, 2019
This paper deals with the mixture design of 3D printable concrete (3DPC) based on the theoretical analysis of the yield stress of mortar. It has been found that there is a linear relationship between the flowability of paste and optimum aggregate content
Zhang Chao, Hou Zeyu, Chun Chen, Yamei Zhang, V. Mechtcherine, Zhengming Sun   +5 more
semanticscholar   +1 more source

Effects of redispersible polymer powders on the structural build-up of 3D printing cement paste with and without hydroxypropyl methylcellulose

, 2020
This paper studies the effects of polyvinyl acetate-ethylene (VAE) based redispersible polymer powder (RPP) and polyvinyl acetate-vinyl versatate-ethylene (VVE) based RPP on the structural build-up of 3D printing cement paste within several hours of ...
Y. Zhang, Zheng-wu Jiang, Yan Zhu, Jie Zhang, Qiang Ren, Tao Huang   +5 more
semanticscholar   +1 more source

Effects and threshold of water film thickness on multi-mineral cement paste

, 2020
In this study, the effect of the water film thickness (WFT) on unary, binary, and ternary mixtures containing cement, basalt powder (BP), and zeolite powder (ZP) were investigated.
Hengrui Liu, Xiao Sun, Hui Du, Haodan Lu, Yuanshan Ma, Weikang Shen, Z. Tian   +6 more
semanticscholar   +1 more source

Study on high-efficiency CO2 absorption by fresh cement paste

, 2020
In order to achieve high efficiency absorption of CO2 by fresh cement paste, a special CO2 absorption device was designed. Then the influences of stirring rate (SR), water-to-cement ratio(W/C), superplasticizer type and its addition order on the CO2 ...
Liu Lili, Yongsheng Ji, Furong Gao, Li Zhang, Zhongzhe Zhang, Liu Xiangyu   +5 more
semanticscholar   +1 more source

Cement paste and concrete hardening under strain: I. Cement paste research

Cement and Concrete Research, 1995
Abstract This paper describes cement systems (paste, concrete, etc.) hardening under strain (HUS) when those systems get additional strength through adjusted stresses. The fundamental physical and chemical processes and the results of their research are given in the abstract with the mechanism of cement systems HUS.
openaire   +1 more source

Surface magnetic relaxation in cement pastes

Magnetic Resonance Imaging, 1994
Surface magnetic relaxation in porous media is usually attributed to hindered rotation or to paramagnetic impurities on the surface. In cement pastes, however, it seems reasonable to attribute surface relaxation to dipole interactions in water adsorbed as water of hydration on grain surfaces.
K S, Mendelson, W P, Halperin, J Y, Jehng, Y Q, Song   +3 more
openaire   +2 more sources

Rheological behavior of calcium sulfoaluminate cement paste with supplementary cementitious materials

, 2020
Calcium sulfoaluminate (CSA) cement has the potential to become the ‘future cement’ given its excellent characteristics, such as low carbon, energy saving, and low shrinkage.
G. Ke, Jun Zhang, Shixiang Xie, T. Pei
semanticscholar   +1 more source

Mathematical modeling of accelerated carbonation curing of Portland cement paste at early age

Cement and Concrete Research, 2019
Accelerated carbonation curing is considered as a promising method to improve mechanical properties and durability of cement-based materials and it also provides a potential for reducing carbon emission. In this paper, a partial differential mathematical
Tiefeng Chen, Xiaojian Gao, L. Qin
semanticscholar   +1 more source