Pozzolanic reaction of lightweight fine aggregate and its influence on the hydration of cement

被引：44
作者：
Nie, Shuai [1 ]
Hu, Shuguang [1 ]
Wang, Fazhou [1 ]
Hu, Chuanlin [1 ]
Li, Xinping [2 ]
Zhu, Yaohong [3 ]
机构：
[1] Wuhan Univ Technol, State Key Lab Silicate Mat Architecture, 122 Luoshi Rd, Wuhan 430070, Peoples R China
[2] Wuhan Univ Technol, Sch Civil Engn & Architecture, Wuhan 430070, Peoples R China
[3] Ningbo Urban Rail Transit Project Construct Headq, Ningbo 315012, Zhejiang, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2017年 / 153卷
基金：
国家重点研发计划;
关键词：
Lightweight fine aggregate; Pozzolanic reaction; Cement hydration; C-A-S-H; C-S-H; FLY-ASH; PART I; PHASES; TEMPERATURE; ACTIVATION; PASTES; MICROSTRUCTURE; CONCRETE; MORTARS;
D O I：
10.1016/j.conbuildmat.2017.07.111
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Although lightweight fine aggregate (LWFA) has been used as an internal curing material in concrete for several decades, its chemical activity is not well estimated. In this research, LWFA is incorporated into cement paste to investigate the pozzolanic reaction and its influence on the hydration of cement. The results show that LWFA is more chemically active under heat-cured conditions and continuously releases Al and Si, which increases the Al/Ca and Si/Ca ratios of hydration products. Moreover, LWFA provides large surface for nucleation and the growth of hydration products and promotes the formation of C-A-S-H. The microstructural characterization demonstrates that the reaction products of LWFA are very similar to those of metakaolinite by-products and kaolinite-based clay waste. (C) 2017 Published by Elsevier Ltd.
引用
收藏
页码：165 / 173
页数：9
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