Microstructure and durability of mortars modified with medium active blast furnace slag

被引：86

作者：

Hadj-sadok, Ahmed ^{[1
,2
]}

Kenai, Said ^{[1
]}

Courard, Luc ^{[3
]}

Darimont, Anne ^{[3
]}

机构：

[1] Univ Blida, Geomat Lab, Dept Civil Engn, Blida, Algeria

[2] Hydraul Natl Inst ENSH, Blida, Algeria

[3] Univ Liege, GeMMe Sector, ArGEnCo Dept, Fac Sci Appl, B-4000 Liege, Belgium

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2011年 / 25卷 / 02期

关键词：

Environment; Mortar; Blast furnace slag; Hydraulic activity; Pore structure; Microstructure; Durability; Chloride diffusion; CONCRETE; PERFORMANCE; PERMEABILITY; DEGRADATION; GGBS;

D O I：

10.1016/j.conbuildmat.2010.06.077

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Mechanical characteristics and durability properties of blast furnace slag cement composites largely depend on the hydraulic activity of the slag. In this paper, a Granulated Blast Furnace Slag with a low reactivity index is used in modifying mortar composition. Microstructure and durability of mixes containing 0%, 30% and 50% of slag as substitution to OPC are respectively compared and analyzed. Water porosity, Mercury Intrusion Porosity and pore size distribution are studied after 28, 90 and 360 days of wet curing. A qualitative microstructure analysis of mortars is proposed with Scanning Electron Microscope (SEM). The durability of mortar is evaluated through capillary water absorption and chloride diffusion tests. The results indicate a finer porosity and lower water absorption for slag mortars at old ages (90 and 360 days). Moreover, lower chloride diffusion for 50% blast furnace slag substitution is observed. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1018 / 1025

页数：8

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