Influence of recycled aggregate on fly ash geopolymer concrete properties

被引：252

作者：

Nuaklong, Peem ^{[1
]}

Sata, Vanchai ^{[1
]}

Chindaprasirt, Prinya ^{[1
]}

机构：

[1] Khon Kaen Univ, Dept Civil Engn, Sustainable Infrastruct Res & Dev Ctr, Fac Engn, Khon Kaen 40002, Thailand

来源：

JOURNAL OF CLEANER PRODUCTION | 2016年 / 112卷

关键词：

Recycled aggregate; High calcium fly ash; Geopolymer concrete; Mechanical properties; Durability; DURABILITY PROPERTIES; MECHANICAL-PROPERTIES; COMPRESSIVE STRENGTH; CHLORIDE PENETRATION; PORTLAND-CEMENT; BOTTOM ASH; RESISTANCE; PASTES; ACID;

D O I：

10.1016/j.jclepro.2015.10.109

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Geopolymer binder and recycled aggregate are environment friendly products and is thus considered as part of sustainable development. This paper presents a study of the effect of recycled aggregate on strength and durability of fly ash based geopolymer concrete. Geopolymer concrete samples were prepared from high calcium fly ash, sodium silicate solution, sodium hydroxide solution, fine aggregate from river sand, and two types of coarse aggregate viz., recycled concrete aggregate and crushed limestone coarse aggregate. Test results indicated that recycled concrete aggregate can be used as a coarse aggregate in high calcium fly ash geopolymer concretes with the 7-day compressive strengths of 30.6-38.4 MPa which were slightly lower than those of high calcium fly ash geopolymer concretes containing crushed limestone. The use of high sodium hydroxide concentrations of 12 and 16 M resulted in better performances both in strength and durability than that of 8 M. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：2300 / 2307

页数：8

共 45 条

[41] Characterisation of class F fly ash geopolymer pastes immersed in acid and alkaline solutions [J].