基于HYMOSTRUC3D的水泥基材料微结构变化规律研究

doi:10.11896/cldb.19090115

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Abstract The mineral admixtures used in modern cement-based materials make the study of the evolution characteristics of cement stone microstructures more complicated. In this paper, the oxide composition and content of the material are fully considered, and the hydration rate parameters of Portland cement (PC), fly ash (FA) and blast furnace slag (BFS) are calculated and substituted into the HYMOSTRUC3D software for modeling. With considering the influence of water-cement ratio and mineral admixture, the relationship between cement, C-S-H, CH, hydration heat, porosity, pore size distribution with the hydration age were established and the evolution of microstructure during cement hydration was obtained. The contents of CH and C-S-H were obtained based on the model established in HYMOSTRUC3D, and compared with XRD test results and CEMHYD3D simulation results. The generation of CH in cement hydration process and the consumption of cement-base materials mixed with FA or BFS were considered. And the effects of different amounts of active mineral admixtures on cement were simulated and studied. At the same time, the influence of water-cement ratio on porosity and pore size distribution and porosity and pore size distribution over time were predicted. The results show that the simulation results of HYMOSTRUC3D are in good agreement with the XRD test results and the CEMHYD3D simulation results, which verifies the calculated hydration rate parameters and the established model. The study also found that the incorporation of FA or BFS can consume CH produced by cement hydration, and can effectively control the hydration heat release of cement-based materials, the larger the dosage, the more CH consumed, and the more obvious the heat control effect. In addition, the larger the water-cement ratio, the larger the porosity of the cement stone, the more the macropore, and the wider the pore size distribution.

Key words： cement hydration HYMOSTRUC3D model mineral admixtures microstructure CH content heat release

Published: 02 December 2020

CLC number:

TU52

Fund:This work was financially supported by the National Key Research and Development Program of China (2016YFE0204300).

About author:: Shaojun Zhengreceived his B.S. degree in civil engineering from China University of Geosciences (Wuhan) in June 2016. He is currently pursuing his Ph.D. at China University of Geosciences (Wuhan) under the supervision of Prof. Guosheng Jiang and Associate Prof. Tianle Liu. His research has focused on the temporal and spatial evolution of microstructure in the process of water-based mud material hydration under multi field coupling.Tianle Liureceived his Ph.D. degree in drilling and completion engineering from St. Petersburg State University of Mining and Technology in June 2016. He is currently an associate professor in China University of Geosciences (Wuhan), was selected into the “Overseas excellent doctoral talent introduction program” of Hubei Province and “Entrepreneurship and Innovation Talents Program” of Jiangsu Province. His research interests are the research of cement-based material close accumulation, unconventional cementing and special reinforcement technology. He has presided over or participated in more than 10 scientific research projects, published more than 30 articles in important journals at home or abroad, applied for 6 Chinese invention patents and 8 Russian invention patents as the first person, won 1 first prize of technological invention of the Ministry of education, 1 second prize of self-made experimental instrument award of Hubei Province, 1 third prize of St. Petersburg Youth Science and technology award of Russia.

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	ZHENG Shaojun
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Cite this article:

ZHENG Shaojun,LIU Tianle,JIANG Guosheng, et al. Research on Cement Hydration Microstructure Evolution Process Based on HYMOSTRUC3D Model[J]. Materials Reports, 2020, 34(22): 22047-22053.

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http://www.mater-rep.com/EN/10.11896/cldb.19090115 OR http://www.mater-rep.com/EN/Y2020/V34/I22/22047

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