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Influence of Anti-cracking Fiber on Properties of Traditional Sticky Rice-lime Mortar.

Authors :
Zhang, Jiahui
Wei, Guofeng
Zhou, Hu
Source :
Studies in Conservation. Aug2023, Vol. 68 Issue 6, p679-690. 12p.
Publication Year :
2023

Abstract

Traditional sticky rice-lime mortar plays an important role in the restoration of Chinese historical buildings. However, its application in ancient building restoration is restricted due to some shortcomings of lime-based materials such as high shrinkage, low hardness in the early phase, cracking during carbonation, etc. In order to make better use of sticky rice-lime mortar, the research presented in this article evaluates the influence of admixtures (flax fiber, polypropylene fiber, and paper fiber) on the properties of traditional sticky rice-lime mortar by testing compressive and flexural strengths, surface hardness, drying shrinkage, water absorption, freezing-thawing cycles, carbonation degree, and through performing X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). Results revealed that three types of fibers ameliorated the mechanical strength, anti-shrinkage performance, durability, and microstructure of traditional sticky rice-lime mortar. 1.5% paper fiber was the most effective admixture to increase the mechanical properties and reduce the water absorption rates, and it improved the freeze–thaw cycles by more than 10 times; the incorporation of polypropylene fiber significantly reduced the drying shrinkage rates. In the practice of brick-stone cultural heritage conservation, it is recommended to consider adding paper fibers to improve the comprehensive performance of traditional sticky rice-lime mortar and adding polypropylene fibers to improve shrinkage resistance. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00393630
Volume :
68
Issue :
6
Database :
Academic Search Index
Journal :
Studies in Conservation
Publication Type :
Academic Journal
Accession number :
164491295
Full Text :
https://doi.org/10.1080/00393630.2022.2091730