The role of dissolved rice husk ash in the development of binary blast furnace slag-sewage sludge ash alkali-activated mortars

被引：9
|
作者：
Istuque, Danilo Bordan [1 ]
Paya, Jordi [2 ]
Soriano, Lourdes [2 ]
Victoria Borrachero, Maria [2 ]
Monzo, Jose [2 ]
Tashima, Mauro Mitsuuchi [1 ]
机构：
[1] Univ Estadual Paulista, Fac Engn Ilha Solteira, UNESP, MAC Grp Pesquisa Mat Alternat Construcao, Ilha Solteira, SP, Brazil
[2] Univ Politecn Valencia UPV, ICITECH Inst Ciencia & Tecnol Hormigon, Valencia, Spain
来源：
JOURNAL OF BUILDING ENGINEERING | 2022年 / 52卷
关键词：
Alkaline activation; Rice husk ash; Sodium silicate suspensions; Sewage sludge ash; Blast furnace slag; Microstructure; COMPRESSIVE STRENGTH; SODIUM-SILICATE; FLY-ASH; GEOPOLYMER; CEMENT; BINDERS; MICROSTRUCTURE; SSA; HYDRATION; CONCRETE;
D O I：
10.1016/j.jobe.2022.104472
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This study evaluated the compressive strength performance and microstructure of binary blast furnace slag-sewage sludge ash (BFS-SSA) alkali-activated mortars, in which rice husk ash (RHA) was dissolved in NaOH solution to replace commercial sodium silicate. The dissolution of RHA, performed in a thermal bottle with NaOH solution, enhanced the compressive strength of the alkali-activated mortars based on BFS up to 4.5-fold. BFS-SSA based mortars (10-40% SSA), activated with NaOH/RHA-based sodium silicate suspensions, reached a compressive strength up to 30 MPa after 28 curing days at 20 degrees C. The RHA dissolution enhanced the strength and sustainability of the BFS-SSA alkali-activated mortars.
引用
收藏
页数：14
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