玄武岩纤维增强工程水泥基复合材料力学性能与微观结构的试验研究

Experimental Investigation on the Mechanical Properties and Microstructure of Basalt Fiber Reinforced Engineered Cementitious Composite.

作者信息

Du Qiang, Cai Changlu, Lv Jing, Wu Jiao, Pan Ting, Zhou Jie

机构信息

School of Economics and Management, Chang' an University, Xi'an 710064, China.

Center for Green Engineering and Sustainable Development, Chang' an University, Xi'an 710064, China.

出版信息

Materials (Basel). 2020 Aug 28;13(17):3796. doi: 10.3390/ma13173796.

DOI:10.3390/ma13173796

PMID:32872088

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7504375/

Abstract

This study investigated fundamental mechanical properties of a basalt fiber reinforced engineered cementitious composite (BF-ECC) with different volume fractions of basalt fiber (BF), water-binder ratio (W/B) and fly ash (FA) content. The compressive strength, splitting tensile strength, flexural strength and static modulus of BF-ECC were studied at 3, 28 and 56 days, respectively, to explore their development along the ages. Furthermore, the scanning electron microscopy (SEM) analysis was conducted to evaluate the microstructure of BF-ECC. Experiment results demonstrated that bond quality between the BF and the matrix is good, which leads to a significant increase in the flexural strength and splitting tensile strength. The pozzolanic effect of FA obviously improved the splitting tensile and flexural strength of BF-ECC after 56 days of curing, and the appropriate content of the FA content in the BF-ECC ranges from 50% to 60%.

摘要

本研究调查了不同玄武岩纤维（BF）体积分数、水胶比（W/B）和粉煤灰（FA）含量的玄武岩纤维增强工程水泥基复合材料（BF-ECC）的基本力学性能。分别在3天、28天和56天时研究了BF-ECC的抗压强度、劈裂抗拉强度、抗弯强度和静态模量，以探究其随龄期的发展情况。此外，进行了扫描电子显微镜（SEM）分析以评估BF-ECC的微观结构。实验结果表明，BF与基体之间的粘结质量良好，这导致抗弯强度和劈裂抗拉强度显著提高。FA的火山灰效应在养护56天后明显提高了BF-ECC的劈裂抗拉强度和抗弯强度，且BF-ECC中FA的合适含量范围为50%至60%。