期刊
MATERIALS
卷 13, 期 14, 页码 -出版社
MDPI
DOI: 10.3390/ma13143194
关键词
magnesium phosphate cement; coir fiber; fiber length; compressive properties; energy absorption; micro-morphology
类别
资金
- Graduate Student Innovation Ability Cultivation Fund of Guangzhou University [2019GDJC-M38]
- National Natural Science Foundation of China [51608137]
- Innovation Training Project of Guangzhou University [CX2019329]
Coir fiber (CF), an eco-friendly and renewable natural fiber, was introduced into magnesium phosphate cement (MPC) mortar to improve its crack resistance. A total of 21 specimens were employed to investigate the failure pattern, compressive strength, stress-strain curve, and energy absorption of MPC with varying CF lengths (0, 5, 10, 15, 20, 25, and 30 mm) after a curing period of 28 days through a static compressive test. The results demonstrated that compressive strength, elastic modulus, and secant modulus decreased with the increase in CF length. However, energy absorption presented a convex curve, which increased to the maximum value (77.0% relative to the value of the specimen without CF) with a CF length of 20 mm and then declined. A series of modern micro-tests were then carried out to analyze the microstructure and composition of specimens to explain the properties microscopically.
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