NDLI: Flexural Properties and Microstructure Mechanisms of Renewable Coir-Fiber-Reinforced Magnesium Phosphate Cement-Based Composite Considering Curing Ages

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Flexural Properties and Microstructure Mechanisms of Renewable Coir-Fiber-Reinforced Magnesium Phosphate Cement-Based Composite Considering Curing Ages

Content Provider	MDPI
Author	Zhang, Liwen Jiang, Zuqian Zhang, Wenhua Peng, Sixue Chen, Pengfei
Copyright Year	2020
Description	As a renewable natural plant fiber, Coir fiber (CF) can be used to as an alternative to improve poor toughness and crack resistance of magnesium phosphate cement (MPC), replacing such artificial fibers as steel fiber and glass fiber and thereby reducing huge energy consumptions and large costs in artificial fibers’ production and waste treatment. Aiming at examining the effects of CF volume concentrations on MPC flexural properties, this study employed a typical three-point bending test, including thirty cuboid specimens, to investigate the flexural strength, load-deflection behavior, and flexural toughness of MPC with different CF volume concentrations from 0% to 4% at the curing age of seven days and 28 days. Results demonstrated that CF presented similar effects on MPC’s properties at two curing ages. At both curing ages, as CF grew, flexural strength increased first and then decreased; specimen stiffness, i.e., MPC elastic modulus, displayed a decreasing trend; and flexural toughness was improved continuously. Additionally, modern microtesting techniques, such as, scanning electron microscopy (SEM) and energy dispersive X-ray detection (EDX), were adopted to analyze the microstructure and compositions of CF and specimens for explaining the properties microscopically.
Starting Page	2556
e-ISSN	20734360
DOI	10.3390/polym12112556
Journal	Polymers
Issue Number	11
Volume Number	12
Language	English
Publisher	MDPI
Publisher Date	2020-10-31
Access Restriction	Open
Subject Keyword	Polymers Characterization and Testing of Materials Magnesium Phosphate Cement Flexural Strength Coir Fiber Three-point Bending Test
Content Type	Text
Resource Type	Article

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