JZUS - Journal of Zhejiang University SCIENCE

Journal of Zhejiang University SCIENCE A

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Thermodynamics-based simulations of the hydration of low-heat Portland cement and the compensatory effect of magnesium oxide admixtures

Author(s): Wenwei LI^1, ², Yifan ZHOU³, Jiajie YIN³, Yuxiang PENG³, Yushan WANG⁴, Shengwen TANG^3, ⁵, Yan SHI², Wang YANG³, Lei WANG⁶
Affiliation(s): ¹China Three Gorges Corporation, Beijing 100038, China; more
Corresponding email(s): tangsw@whu.edu.cn
Key Words: Low-heat Portland cement; Shrinkage; Magnesium oxide expansion; Thermodynamic modeling; Hydration; Pore structure

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Wenwei LI^1,², Yifan ZHOU³, Jiajie YIN³, Yuxiang PENG³, Yushan WANG⁴, Shengwen TANG^3,⁵, Yan SHI², Wang YANG³, Lei WANG⁶. Thermodynamics-based simulations of the hydration of low-heat Portland cement and the compensatory effect of magnesium oxide admixtures[J]. Journal of Zhejiang University Science A,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.A2400521

@article{title="Thermodynamics-based simulations of the hydration of low-heat Portland cement and the compensatory effect of magnesium oxide admixtures",
author="Wenwei LI^1,², Yifan ZHOU³, Jiajie YIN³, Yuxiang PENG³, Yushan WANG⁴, Shengwen TANG^3,⁵, Yan SHI², Wang YANG³, Lei WANG⁶",
journal="Journal of Zhejiang University Science A",
year="in press",
publisher="Zhejiang University Press & Springer",
doi="https://doi.org/10.1631/jzus.A2400521"
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%T Thermodynamics-based simulations of the hydration of low-heat Portland cement and the compensatory effect of magnesium oxide admixtures
%A Wenwei LI^1
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%A Yifan ZHOU³
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%A Yushan WANG⁴
%A Shengwen TANG^3
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%A Yan SHI²
%A Wang YANG³
%A Lei WANG⁶
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doi="https://doi.org/10.1631/jzus.A2400521"

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A1 - Yuxiang PENG³
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A1 - Wang YANG³
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doi="https://doi.org/10.1631/jzus.A2400521"

Abstract
Chinese Summary
Academic Network
Reviewer Comment

Abstract: Low-heat Portland (LHP) cement is a new type of Portland cement that has been widely used in recent years due to its low heat of hydration, which makes it exceptional in temperature control for mass concrete construction. However, limited studies have investigated the impact of temperature and magnesium oxide (MgO) content on LHP cement-based materials. This study utilizes thermodynamic simulations to study the hydration process, pore structure, and autogenous shrinkage of LHP cement pastes with different water-to-cement ratios (0.3, 0.4, and 0.5), curing temperatures (5�C, 15�C, 20�C, and 30�C) and MgO contents (2%, 4%, and 5%). Higher curing temperature is found to promote the hydration reactions in cement paste. Moreover, the addition of 4wt% MgO reduces the porosity and shrinkage of the paste to a certain extent. The microstructural evolution of different LHP pastes is examined through a comparative analysis, lending insights into LHP cement-based material applica-tions.

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