The influence of curing methods on the strength of MSWI bottom ash-based alkali-activated mortars: The role of leaching of OH- and free alkali

被引：77
作者：
Huang, Guodong [1 ,2 ,3 ]
Ji, Yongsheng [1 ,3 ]
Zhang, Linglei [1 ,3 ]
Li, Jun [1 ,3 ]
Hou, Zhihui [1 ,3 ]
机构：
[1] China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 21116, Jiangsu, Peoples R China
[2] Anhui Univ Sci & Technol, Sch Civil Engn & Construct, Huainan 232001, Anhui, Peoples R China
[3] China Univ Min & Technol, Sch Mech & Civil Engn, Xuzhou 21116, Jiangsu, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2018年 / 186卷
关键词：
Curing methods; Municipal solid waste incineration bottom ash; Granulated blast-furnace slag; Alkali-activated; Mortar; Free alkali; OH-; FLY-ASH; SLAG; CEMENT; RESISTANCE; STABILITY; HYDRATION; CONCRETE;
D O I：
10.1016/j.conbuildmat.2018.07.224
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This study investigated the influence of different curing methods on the strength development of municipal solid waste incinerator bottom ash alkali-activated mortars. The results showed that standard room curing is not suitable for alkali-activated materials. The main reason for this is the humidity > 95% in the curing room, which causes wet sample surfaces. This leads to OH- and free alkali leaching, which severely affects strength development. Soaking curing further aggravates this effect. However, seal curing effectively prevents the leaching of OH- and free alkali and thus maintains high alkalinity, which benefits the strength development. Therefore, the method of seal curing is more suitable for alkali-activated materials. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：978 / 985
页数：8
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