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考虑纤维长度的环保椰壳纤维掺加磷酸镁水泥抗压性能研究

Study on the Compressive Properties of Magnesium Phosphate Cement Mixing with Eco-Friendly Coir Fiber Considering Fiber Length.

作者信息

Jiang Zuqian, Zhang Liwen, Geng Tao, Lai Yushan, Zheng Weile, Huang Min

机构信息

Department of Civil Engineering, Guangzhou University, Guangzhou 510006, China.

出版信息

Materials (Basel). 2020 Jul 17;13(14):3194. doi: 10.3390/ma13143194.

DOI:10.3390/ma13143194
PMID:32708951
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7411843/
Abstract

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.

摘要

椰壳纤维（CF）是一种环保且可再生的天然纤维，被引入磷酸镁水泥（MPC）砂浆中以提高其抗裂性。通过静态压缩试验，共使用21个试件来研究在28天养护期后，不同CF长度（0、5、10、15、20、25和30毫米）的MPC的破坏模式、抗压强度、应力 - 应变曲线和能量吸收。结果表明，抗压强度、弹性模量和割线模量随CF长度的增加而降低。然而，能量吸收呈现出一条凸曲线，在CF长度为20毫米时增加到最大值（相对于无CF试件的值为77.0%），然后下降。随后进行了一系列现代微观测试，以分析试件的微观结构和组成，从而从微观角度解释其性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/d29d140d1421/materials-13-03194-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/46ba020a0450/materials-13-03194-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/10247bb64763/materials-13-03194-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/27d605fe817b/materials-13-03194-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/3c68cd9f3b91/materials-13-03194-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/a006aedc0cfd/materials-13-03194-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/d29d140d1421/materials-13-03194-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/51e7c15a767f/materials-13-03194-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/8096190a78bc/materials-13-03194-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/9974f333753c/materials-13-03194-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/64af92a6c376/materials-13-03194-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/e2bb57a52d43/materials-13-03194-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/46ba020a0450/materials-13-03194-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/10247bb64763/materials-13-03194-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/27d605fe817b/materials-13-03194-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/3c68cd9f3b91/materials-13-03194-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/9cf7cbb3dc88/materials-13-03194-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/a006aedc0cfd/materials-13-03194-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b6e6/7411843/d29d140d1421/materials-13-03194-g012.jpg

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