@article{XIONG2022, 
author = {Guiyan XIONG and Shuyue LI and Xiaolu GUO},
title = {Effect of Cracking Ages on Self‒Healing of Pure Fly Ash‒Based Engineered Geopolymer Composite},
year = {2022},
journal = {Journal of the Chinese Ceramic Society},
volume = {50},
number = {11},
pages = {2868-2876},
keywords = {engineered geopolymer composite, fly ash, cracking age, self‒healing},
url = {https://www.sciopen.com/article/10.14062/j.issn.0454-5648.20220196},
doi = {10.14062/j.issn.0454-5648.20220196},
abstract = {The effect of cracking ages (i.e., 3, 7, 14 d and 28 d) on the self‒healing of pure fly ash-based engineered geopolymer composite (FA-EGC) was evaluated by crack characteristics, tensile properties and water absorption. The components and microstructure of self‒healing products of FA-EGC were investigated by Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscopy with energy dispersive spectroscopy. The results show that there is an optimum self‒healing effect of FA-EGC samples when cracking age is 7 d, a better recovery of ultimate tensile strength and a reduction in average water absorption rate can be obtained at the maximum decrease in crack width. The self‒healing products of FA-EGC are the geopolymer gel generated by ongoing geopolymerization reaction and CaCO3.}
}