EFFECT OF CARBONATION ON PROPERTIES OF ALKALI-ACTIVATED SLAG BINDERS

被引：0
|
作者：
He, Juan [1 ]
Wu, Yonghua [1 ]
Yang, Changhui [2 ]
Gao, Qie [1 ]
Pu, Xiaolin [1 ]
机构：
[1] Xian Univ Architecture & Technol, Coll Mat & Mineral Resources, Xian, Shaanxi, Peoples R China
[2] Chongqing Univ, Coll Mat Sci & Engn, Chongqing, Peoples R China
来源：
REVISTA ROMANA DE MATERIALE-ROMANIAN JOURNAL OF MATERIALS | 2018年 / 48卷 / 03期
关键词：
Alkali-Activated Slag; Carbonation; Pore structure; Carbonation product; Carbonation shrinkage; CALCIUM SILICATE HYDRATE; PORTLAND-CEMENT; CONCRETE; DURABILITY; MICROSTRUCTURE; RESISTANCE;
D O I：
暂无
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
AAS binders activated by water glass (WG) and sodium hydroxide (NaOH) solution was used to investigate its carbonation properties. Carbonation product, carbonation shrinkage, and effect of carbonation on pore structure of AAS paste were studied. Compared with noncarbonated one, when AAS paste was carbonated, specific surface area and cumulative pore volume increased, and average pore diameter and most probable pore diameter reduced. As for carbonation product, the main form of CaCO3 is calcite, and the phases as vaterite and aragonite are lesser. The amount of aragonite and vaterite increases with the increase of carbonation age. During carbonation, the shrinkage only comes from the migration of Ca2+ from C-A-S-H gel and the increase of degree of polymerization (DP) of C-A-S-H gel. Carbonation process of AAS paste doesn't increase the dry shrinkage.
引用
收藏
页码：330 / 337
页数：8
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