Creep Mechanisms of Calcium-Silicate-Hydrate: An Overview of Recent Advances and Challenges

被引:0
|
作者
Ye, Hailong [1 ]
机构
[1] Penn State Univ, Dept Civil & Environm Engn, State Coll, PA 16801 USA
关键词
calcium-silicate-hydrate; nanostructure; creep mechanism; relative humidity; shrinkage; C-S-H; HARDENED CEMENT PASTE; MICROPRESTRESS-SOLIDIFICATION THEORY; CONCRETE CREEP; MICROINDENTATION CREEP; PORTLAND-CEMENT; SHRINKAGE; MODEL; WATER; PREDICTION;
D O I
10.1007/s40069-015-0114-7
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
A critical review on existing creep theories in calcium-silicate-hydrate (C-S-H) is presented with an emphasis on several fundamental questions (e.g. the roles of water, relative humidity, temperature, atomic ordering of C-S-H). A consensus on the rearrangement of nanostructures of C-S-H as a main consequence of creep, has almost been achieved. However, main disagreement still exists on two basic aspects regarding creep mechanisms: (1) at which site the creep occurs, like at interlayer, intergranular, or regions where C-S-H has a relatively higher solubility; (2) how the structural rearrangement evolutes, like in a manner of interlayer sliding, intra-transfer of water at various scales, recrystallization of gelled-like particles, or dissolution-diffusion-reprecipitation at inter-particle boundary. The further understanding of creep behavior of C-S-H relies heavily on the appropriate characterization of its nanostructure.
引用
收藏
页码:453 / 462
页数:10
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