活性粉末混凝土中钢纤维与高强混凝土基体匹配关系的研究

Investigation of the Match Relation between Steel Fiber and High-Strength Concrete Matrix in Reactive Powder Concrete.

作者信息

Yang Guangyao, Wei Jiangxiong, Yu Qijun, Huang Haoliang, Li Fangxian

机构信息

School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.

出版信息

Materials (Basel). 2019 May 29;12(11):1751. doi: 10.3390/ma12111751.

DOI:10.3390/ma12111751

PMID:31146444

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6601055/

Abstract

This study investigated the strength and toughness of reactive powder concrete (RPC) made with various steel fiber lengths and concrete strengths. The results indicated that among RPC samples with strength of 150 MPa, RPC reinforced with long steel fibers had the highest compressive strength, peak strength, and toughness. Among the RPC samples with strength of 270 MPa, RPC reinforced with short steel fibers had the highest compressive strength, and peak strength, while RPC reinforced with medium-length steel fibers had the highest toughness. As a result of the higher bond adhesion between fibers and ultra-high-strength RPC matrix, long steel fibers were more effective for the reinforcement of RPC with strength of 150 MPa, while short steel fibers were more effective for the reinforcement of RPC with strength of 270 MPa.

摘要

本研究调查了采用不同钢纤维长度和混凝土强度制成的活性粉末混凝土（RPC）的强度和韧性。结果表明，在强度为150MPa的RPC样品中，用长钢纤维增强的RPC具有最高的抗压强度、峰值强度和韧性。在强度为270MPa的RPC样品中，用短钢纤维增强的RPC具有最高的抗压强度和峰值强度，而用中等长度钢纤维增强的RPC具有最高的韧性。由于纤维与超高强度RPC基体之间具有更高的粘结附着力，长钢纤维对强度为150MPa的RPC增强效果更佳，而短钢纤维对强度为270MPa的RPC增强效果更佳。