Effect of fly ash on the self-healing capability of cementitious materials with crystalline admixture under different conditions

被引：6
|
作者：
Wang, Xi [1 ]
Qiao, Hao [1 ]
Zhang, Ziwei [1 ]
Tang, Shiying [2 ]
Liu, Shengjun [1 ,3 ]
Niu, Mengdie [1 ]
Li, Guoxin [1 ]
机构：
[1] Xian Univ Architecture & Technol, Coll Mat Sci & Engn, Xian 710055, Peoples R China
[2] Northwest Inst Nucl Technol, Xian 710024, Peoples R China
[3] CCCC First Highway Consultants Co Ltd, Xian 710075, Peoples R China
来源：
AIP ADVANCES | 2021年 / 11卷 / 07期
关键词：
CONCRETE; PERFORMANCE; PERMEABILITY; DURABILITY; COMPOSITES; BEHAVIOR; ABILITY; CRACKS; AGE;
D O I：
10.1063/5.0056183
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The self-healing capability of cracks plays an important role in improving the durability of concrete. This study investigated the the self-healing capability of mortar with crystalline admixture and fly ash under three conditions. The compressive strength, water absorption, and surface crack pattern were used to evaluate self-healing capability of mortar, and the composition of the healing products was analyzed by x-ray diffraction and scanning electron microscopy. The results indicated that the crystalline admixture could improve the self-healing capability of cementitious materials but caused a negative effect if adding too great an amount of fly ash (>= 20%). The specimen that was immersed in water showed favorable self-healing capability of cracks. The healing products in cracks are mainly composed of CaCO3.
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页数：10
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