Functional Lightweight Aggregates in Mass Concrete：Application and Temperature Control Technology

被引：0
|
作者：
Pang C. [1 ,2 ]
Liu Z. [3 ]
Mao Y. [1 ,2 ]
Zhang C. [1 ,2 ]
机构：
[1] School of Materials Science and Engineering, Southeast University, Nanjing
[2] Jiangsu Key Laboratory of Civil Engineering Material, Southeast University, Nanjing
[3] Road&Bridge International Co.,Ltd., Beijing
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2023年 / 26卷 / 08期
关键词：
hydration process; mass concrete; temperature control; thermal insulation lightweight aggregate; thermal storage phase⁃change lightweight aggregate;
D O I：
10.3969/j.issn.1007-9629.2023.08.005
中图分类号：
学科分类号：
摘要：
Application techniques of two functional light aggregates(thermal insulation fine aggregate and thermal storage coarse aggregate)in C55 and C30 mass concrete and their effects on the hydration process of cement were investigated. The influence of functional light aggregate admixture on the fresh concrete properties,mechanical properties,peak temperature,and rate of temperature rise was measured. An application technique under semi⁃saturated conditions and controled comparable working performance by decreasing water content was proposed. The results indicate that both thermal insulation fine aggregate and thermal storage coarse aggregate have certain early strength and temperature control functions,in which the thermal storage coarse aggregate is better. The thermal insulation fine aggregate has little effect on the setting and hardening rate of concrete,whereas the thermal storage coarse aggregate can play the role of in⁃situ self⁃heating curing in the early stage due to its phase change energy storage,which obviously speeds up the setting and hardening rate. © 2023 Tongji University. All rights reserved.
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页码：853 / 861
页数：8
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