Retarding the setting time of alkali-activated slag paste by processing the alkali activator into pills and capsules

被引：8

作者：

Huo, Yanlin ^{[1
,2
,3
]}

Huang, Jinguang ^{[4
,5
,6
]}

Lu, Dong ^{[1
,2
,3
]}

Sun, Huayang ^{[1
,2
,3
]}

Liu, Tianan ^{[7
]}

Wang, Jianghong ^{[1
,2
,3
]}

Zhou, Jingya ^{[8
]}

Yang, Yingzi ^{[1
,2
,3
]}

机构：

[1] Harbin Inst Technol, Sch Civil Engn, Harbin 150090, Peoples R China

[2] Harbin Inst Technol, Key Lab Struct Dynam Behav & Control Minist Educ, Harbin 150090, Peoples R China

[3] Harbin Inst Technol, Key Lab Smart Prevent & Mitigat Civil Engn Disaste, Harbin 150090, Peoples R China

[4] Technol Ctr, Henan DR Construction Grp, Zhengzhou 450000, Peoples R China

[5] Henan DR Construct Grp, Postdoctor workstat, Zhengzhou 450000, Peoples R China

[6] Henan Qingshui Construct Technol Co Ltd, R&D Ctr, Xinxiang 453000, Peoples R China

[7] Shanghai Construct 4 Grp Co Ltd, Inst Engn Res, Shanghai 200000, Peoples R China

[8] Yanbian Univ, Coll Geog & Ocean Sci, Jilin 133000, Peoples R China

来源：

STRUCTURES | 2024年 / 64卷

关键词：

Alkali-activated slag concrete; Alkali activator; Setting time; Mechanical properties; Durability; Crack healing capability; CONCRETE; PERFORMANCE; STRENGTH; DESIGN;

D O I：

10.1016/j.istruc.2024.106644

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Rapid setting is one of the most serious factors limiting the application of alkali -activated slag concrete. To address this problem, this study provided a new solution for the first time: solid sodium silicate powder was processed into pills and capsules and then placed into alkali -activated slag paste (AASP). The setting time, mechanical properties, drying shrinkage, carbonation depth, and crack -healing properties of AASP are investigated. The experimental results showed that the processed alkali activator significantly prolongs the setting time of AASP and reduces the drying shrinkage and carbonation of AASP. Additionally, the pre -crack width with AASP would be reduced by approximately 70 % due to the pill -based alkali activator ' s ability to sustain hydration. This approach provides a novel strategy for retarding the setting time of alkali -activated slag concrete and promoting its practical applications.

引用

页数：9

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