Minimum SCM requirements in mixtures containing limestone cement to control thaumasite sulfate attack

被引：25
作者：
Mirvalad, Sajjad [1 ]
Nokken, Michelle [1 ]
机构：
[1] Concordia Univ, Fac Engn & Comp Sci, Dept Bldg Civil & Environm Engn, Montreal, PQ H3G 1M8, Canada
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2015年 / 84卷
关键词：
Portland-limestone cement; Thaumasite; Ettringite; Supplementary cementing materials; Sulfate resistance; Sustainability; MINERAL ADMIXTURES; FLY-ASH; MORTARS; RESISTANCE; CONCRETE; PORTLAND; FORM; PERFORMANCE; FILLER;
D O I：
10.1016/j.conbuildmat.2015.02.074
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Different supplementary cementing materials (SCMs) were used in Portland-limestone cement (PLC) blends in order to achieve sulfate resistance. The resistance was evaluated by studying mortar expansion and mass change in ettringite sulfate attack (ESA) and thaumasite sulfate attack (TSA). The results showed that the PLC blends containing the Canadian standard recommended amounts of SCMs were not resistant against TSA. However, by increasing the SCM amount, the desired resistance was achieved. Additional SCM types not mentioned in CSA were found as high sulfate resistant blended PLC; among those, the ternary blends of PLC, slag, and fly ash were found to be the most resistant. Additionally, for all blends, a very good correlation between the expansion and mass change results was found. (C) 2015 Elsevier Ltd. All rights reserved.
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页码：19 / 29
页数：11
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