Combination Effect of Limestone Filler and Slag on Delayed Ettringite Formation in Heat-Cured Mortar

被引：7
作者：
Deboucha, Walid [1 ,2 ]
Leklou, Nordine [2 ]
Khelidj, Abdelhafid [2 ]
Ple, Olivier [1 ]
Alengaram, U. Johnson [3 ]
机构：
[1] Univ Grenoble Alpes, Univ Savoie Mt Blanc, CNRS, LOCIE, Campus Sci Savoie Technolac, F-73376 Chambery, France
[2] Univ Nantes IUT St Nazaire, LUNAM Univ, Res Inst Civil Engn & Mech, GeM,CNRS,UMR 6183, Nantes, France
[3] Univ Malaya, Dept Civil Engn, Ctr Innovat Construct Technol, Fac Engn, Kuala Lumpur 50603, Malaysia
来源：
JOURNAL OF MATERIALS IN CIVIL ENGINEERING | 2020年 / 32卷 / 03期
关键词：
Delayed ettringite formation (DEF); Expansion; Limestone filler; Slag; BLAST-FURNACE SLAG; ELEVATED-TEMPERATURE; EARLY-AGE; HYDRATION; EXPANSION; STRENGTH; POZZOLANS;
D O I：
10.1061/(ASCE)MT.1943-5533.0003020
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The present paper analyzes the combination effect of slag and limestone filler on the expansion caused by delayed ettringite formation (DEF). Tests were carried out on heat-cured ternary cement mortars with various replacement levels of cement by both limestone filler and slag (15%, 25%, and 45%). The expansion of heat-cured cement mortars was evaluated and verified by measuring their length change, dynamic elastic modulus, and compressive strength over more than 750 days. The addition of limestone filler and slag to portland cement was found to be beneficial to reducing the expansion caused by DEF. It was found that the use of 10% and 20% slag ternary cements with 5% limestone filler delayed the beginning of the expansion and caused a decrease in the long-term expansion. Meanwhile, the use of 40% slag with 5% limestone filler suppressed the expansion caused by DEF.
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页数：6
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