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

Xi Wang; Hao Qiao; Ziwei Zhang; Shiying Tang; Shengjun Liu; Mengdie Niu; Guoxin Li

doi:10.1063/5.0056183

AIP Advances (Jul 2021)

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

Xi Wang,
Hao Qiao,
Ziwei Zhang,
Shiying Tang,
Shengjun Liu,
Mengdie Niu,
Guoxin Li

Affiliations

Xi Wang: College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
Hao Qiao: College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
Ziwei Zhang: College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
Shiying Tang: Northwest Institute of Nuclear Technology, Xi’an 710024, China
Shengjun Liu: College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
Mengdie Niu: College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
Guoxin Li: College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China

DOI: https://doi.org/10.1063/5.0056183
Journal volume & issue: Vol. 11, no. 7
pp. 075018 – 075018-8

Abstract

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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.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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