Effect of binder content on the performance of alkali-activated slag concretes

被引:379
作者
Bernal, Susan A. [1 ]
Mejia de Gutierrez, Ruby [1 ]
Pedraza, Alba L. [1 ]
Provis, John L. [2 ]
Rodriguez, Erich D. [1 ]
Delvasto, Silvio [1 ]
机构
[1] Univ Valle, CENM, Composite Mat Grp, Dept Mat Engn, Cali, Colombia
[2] Univ Melbourne, Dept Chem & Biomol Engn, Melbourne, Vic 3010, Australia
基金
澳大利亚研究理事会;
关键词
Alkali-activated cement; Mixture proportioning; Mechanical properties; Capillary sorptivity; Carbonation; PORE SOLUTION; CARBONATION; PERMEABILITY; DURABILITY; HYDRATION; STRENGTH;
D O I
10.1016/j.cemconres.2010.08.017
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This paper assesses the mechanical and durability performance of concretes produced using alkali silicate-activated ground granulated blast furnace slag as sole binder. Alkali-activated concretes are formulated with 300, 400 and 500 kg slag per m(3) of fresh concrete, and their performance is compared with reference concretes produced using Portland cement (OPCC). Regardless of the binder content, the alkali-activated slag concretes (AASC) develop higher compressive strength than the comparable reference concretes. A higher binder content leads to increased strength in both AASC and OPCC at 28 days. However, at 90 days, the performance penalty for low binder content is more significant in the OPCC than AASC samples. Permeability, water sorption and carbonation resistance properties are also improved at higher binder contents. By controlling mix design parameters, it is possible to produce AASC with mechanical strength and durability comparable to conventional Portland cement concretes. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1 / 8
页数:8
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