Behavior of high performance concrete pastes with different mineral admixtures in simulated seawater environment

被引：39

作者：

Han, Chuanzhou ^{[1
]}

Shen, Weiguo ^{[1
,2
,3
]}

Ji, Xiaoli ^{[1
,3
]}

Wang, Zhongwen ^{[4
]}

Ding, Qingjun ^{[1
,2
]}

Xu, Gelong ^{[1
]}

Lv, Zhenjie ^{[1
]}

Tang, Xinglei ^{[1
]}

机构：

[1] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Hubei, Peoples R China

[2] Wuhan Univ Technol, State Key Lab Silicate Mat Architecture, Wuhan 430070, Hubei, Peoples R China

[3] WUT UC Berkeley Joint Lab Concrete Sci & Technol, Wuhan 430070, Hubei, Peoples R China

[4] Guangdong Prov Changda Highway Engn Co Ltd, Guangzhou 510620, Guangdong, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2018年 / 187卷

关键词：

High performance concrete; Paste; Marine environment; Mineral admixture; Durability; PORTLAND-CEMENT; CORROSION; STRENGTH; CHLORIDE; ATTACK;

D O I：

10.1016/j.conbuildmat.2018.07.196

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

With the blooming of ocean construction engineering, the influence of seawater on concrete durability draws increasing attentions. This paper investigates the performances of five high performance concrete (HPC) pastes, including pure cement paste, fly ash (FA) paste, limestone powder (LP) paste, ground granulated blast-furnace slag (GGBS) paste and silica fume (SF) paste, soaked in simulated seawater. The results indicate that the addition of FA would improve the strength of paste soaked in simulated seawater compared to pure cement paste from 90 d to 360 d and the order of strength in 360 d was, FA paste > Pure cement paste > LP paste > GGBS paste > SF paste. All mineral admixtures except LP can inhibit the expansion of paste soaked in simulated seawater at later age and the order of expansion rate in 360 d was, LP paste > Pure cement paste > FA paste > GGBS paste > SF paste. The internal structure of pastes soaked in simulated seawater at 360 d mainly contains Ca(OH)(2), AFt, gypsum, Mg(OH)(2), C3S and C2S while the external structure of pastes mainly contains Mg(OH)(2), CaCO3 and AFt through the XRD spectra. SEM results proved that the addition of mineral admixtures can make the structure of the pastes denser. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：426 / 438

页数：13