NDLI: Study on mechanical strength and water resistance of organosilicon waterproofing agent blended recycled gypsum plaster

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Study on mechanical strength and water resistance of organosilicon waterproofing agent blended recycled gypsum plaster

Content Provider	Directory of Open Access Journals (DOAJ)
Author	Zhixin Li Kaidong Xu Jiahui Peng Jina Wang Jianwu Zhang Qingxiao Li
Abstract	In this study, organosilicon waterproofing agent blended recycled gypsum plasters (ROGPs) were prepared to determine their mechanical strength and water resistance. According to the results, the water to plaster ratio of ROGP increased steeply. Additionally, the mechanical strength and water resistance of ROGP decreased abruptly as the waterproofing agent increased, thus indicating the waterproofing agent's loss of water resistance. Correspondingly, the water to plaster ratio and mechanical strength of organosilicon waterproofing agent blended commercial gypsum plasters (COGPs) slightly increased and decreased, respectively. Furthermore, the water resistance of COGP increased, and the suitable waterproofing agent was 1.0 %. The analysis shows that the large aspect ratio of ROGP and long-chain polymers increase their water to plaster ratios, whereas their mechanical strength and water resistance decrease owing to the resulting large plate-shaped crystals and poor overlapping between the crystals in hardened ROGP. The loss of water resistance is consequence of the oxidation of Si-H in ROGP. Therefore, different mechanical strength and water resistance development trends could be observed in ROGP and COGP. In principle, this study will contribute to the efficient utilization of recycled gypsum plaster.
Related Links	http://www.sciencedirect.com/science/article/pii/S2214509521000619
ISSN	22145095
DOI	10.1016/j.cscm.2021.e00546
Journal	Case Studies in Construction Materials
Volume Number	14
Language	English
Publisher	Elsevier
Publisher Date	2021-01-01
Publisher Place	United Kingdom
Access Restriction	Open
Subject Keyword	Materials of engineering and construction. Mechanics of materials Recycled Gypsum Plaster Organosilicon Waterproofing Agent Mechanical Strength Water Resistance
Content Type	Text
Resource Type	Article
Subject	Materials Science

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