Hydration, mechanical property and C-S-H structure of early-strength low-heat cement-based materials

被引：66

作者：

Wang, L. ^{[1
]}

Yang, H. Q. ^{[1
]}

Zhou, S. H. ^{[1
]}

Chen, E. ^{[2
]}

Tang, S. W. ^{[3
]}

机构：

[1] Yangtze River Sci Res Inst, Dept Mat & Struct, Wuhan, Hubei, Peoples R China

[2] Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Clear Water Bay, Kowloon, Hong Kong, Peoples R China

[3] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Hubei, Peoples R China

来源：

MATERIALS LETTERS | 2018年 / 217卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Low heat Cement; Hydration heat; Calcium silicate hydrate; Strength; BELITE CEMENTS; MASS CONCRETE; SILICA FUME; CRACKING; WASTES; FIBER;

D O I：

10.1016/j.matlet.2018.01.077

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Utilization of low heat cement is an effective way to decrease the cracking risk in mass concrete. This paper investigates hydration, mechanical property and calcium silicate hydrate (C-S-H) structure of early-strength low-heat Portland (ESLHP) cement-based materials. Due to the low content of C3S and slow hydration rate of ESLHP cement at early age, the hydration heat of ESLHP paste is lower compared with that of Portland cement (PC) paste. C-S-H in ESLHP cement paste has a higher degree of polymerization than that in PC one at late age. Besides, ESLHP cement has desirable early strength. The mechanical property of ESLHP mortar at late age is superior to that of PC mortar. The compressive strength of mortars is positively correlated with the mean silicate chain length in C-S-H. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：151 / 154

页数：4

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