Effect of healing products on the self-healing performance of cementitious materials with crystalline admixtures

被引：18

作者：

Park, Byoungsun ^{[1
]}

Choi, Young Cheol ^{[2
]}

机构：

[1] Korea Conform Labs, Construct Technol Res Ctr, Seoul 08503, South Korea

[2] Gachon Univ, Dept Civil & Environm Engn, Seongnam 13120, South Korea

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2021年 / 270卷

关键词：

Self-healing concrete; Self-healing products; Further hydration; Phase composition; Crystalline admixture; BLAST-FURNACE SLAG; REINFORCEMENT CORROSION; CONTINUED HYDRATION; CRACKED CONCRETE; FLY-ASH; COMPOSITES; CAPABILITY; BEHAVIOR; PERMEABILITY; MICROCRACKS;

D O I：

10.1016/j.conbuildmat.2020.121389

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study examined the correlation between the self-healing products and self-healing performance of cementitious materials with ground granulated blast-furnace slag, a calcium sulfoaluminate expansion agent, and crystalline additives. Self-healing products were collected through artificial cracks produced by overlapping paste slice specimens. Their phase composition was analyzed through thermogravimetry/derivative thermogravimetry by classifying calcite, portlandite, and M70-200. The phase composition generated by internal curing was analyzed through back-scattered electron imaging, exhibiting calcite, C-S-H, and C-A-H. Self-healing performance was evaluated through a water flow test, demonstrating that the greater the contents of calcite and M70-200, the better the self-healing performance. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：12

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