The investigation of early hydration and pore structure for limestone powder wastes blended cement pastes

被引：38
|
作者：
He, Zhen [1 ]
Cai, Rongjin [1 ]
Chen, E. [2 ]
Tang, Shengwen [1 ,3 ]
机构：
[1] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Hubei, Peoples R China
[2] Chalmers Univ Technol, Dept Civil & Environm Engn, Div Struct Engn, Gothenburg, Sweden
[3] Suzhou Inst Wuhan Univ, Suzhou, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 229卷
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
Hydration; Pore structure; Early age; Limestone powder wastes; Impedance; POROUS-MEDIA; MICROSTRUCTURE; CONCRETE; PERMEABILITY; METAKAOLIN; PROPERTY; PHASE;
D O I：
10.1016/j.conbuildmat.2019.116923
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This work systematically investigates the early hydration process and pore structure evolution of high limestone powder wastes content blended cement pastes by non-contact impedance measurement and microstructural tests. According to the evolution of impedance response, the early hydration process of blende cement pastes can be divided into four stages, denominated as dissolution, acceleration, dynamic balance and hardened stages, respectively. Dynamic balance stage not present in hydration process of pure cement, is a characteristic hydration stage for blended cement pastes. Furthermore, fractal approach for predicting the evolution of pore structure is proposed originally, based on the impedance results. (C) 2019 Elsevier Ltd. All rights reserved.
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页数：18
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