Surface drying characteristic of early-age concrete considering cement hydration process

被引：5
|
作者：
Wang, Jiahe [1 ,2 ]
Xie, Yongjiang [1 ,2 ]
Zhong, Xinhua [1 ,2 ]
Feng, Zhongwei [1 ,2 ]
机构：
[1] China Acad Railway Sci Corp Ltd, Railway Engn Res Inst, Beijing 100081, Peoples R China
[2] State Key Lab Track Technol High Speed Railway, Beijing, Peoples R China
来源：
DRYING TECHNOLOGY | 2022年 / 40卷 / 15期
基金：
美国国家科学基金会;
关键词：
Concrete; surface drying; surface factor; cement hydration; theoretical model; MECHANICAL-PROPERTIES; SHRINKAGE; EVAPORATION; DIFFUSION; HUMIDITY; STRENGTH; CRACKING; MODEL; HEAT;
D O I：
10.1080/07373937.2022.2047715
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
In this paper, the surface drying characteristics of concretes under different curing conditions were studied. The surface factors were obtained and an improved theoretical model of surface factor considering cement hydration progress was proposed. The results show that the surface factors of concrete under different curing conditions conform to the two-stage model, and correspond to the moisture saturation and decline period of concrete surface respectively. The surface factor of each concrete is almost the same in the moisture saturation period. However, the surface factor in the moisture decline period is strongly related to the concrete strength grade, curing conditions. In this paper, the area parameter psi(s) is introduced to fully consider the change of pore structure of concrete surface during moisture decline period, and a two-stage theoretical model of concrete surface factor considering the hydration process of cement is proposed.
引用
收藏
页码：3084 / 3099
页数：16
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