Mechanical properties of high-strength steel fiber-reinforced concrete
Mechanical properties of high-strength steel fiber-reinforced concrete
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DOI：
10.1016/j.conbuildmat.2004.04.027
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发表时间：
2004-11-01
影响因子：
7.4
通讯作者：
Hwang, S
中科院分区：
文献类型：
--
作者：
Song, PS;Hwang, S
高强混凝土（HSC）的显着脆性和低拉伸强度和应变能力可以通过添加钢纤维来克服。本文研究了高强钢纤维混凝土的力学性能。性能包括抗压强度和劈裂拉伸强度、断裂模量和韧性指数。钢纤维的添加体积分数为0.5%、1.0%、1.5%和2.0%。纤维混凝土的抗压强度在体积分数为1.5%时达到最大值，比HSC提高了15.3%。纤维混凝土的劈裂拉伸强度和断裂模量随着体积分数的增加而提高，在体积分数为2.0%时分别提高了98.3%和126.6%。纤维增强混凝土的韧性指标随着掺量的增加而提高。指数 15、I-10 和 I-30 的值分别为 6.5、11.8 和 20.6，分数为 2.05%。建立强度模型来预测纤维增强混凝土的抗压强度和劈裂拉伸强度以及断裂模量。模型给出的预测与测量结果相匹配。 (C) 2004 Elsevier Ltd. 保留所有权利。
The marked brittleness with low tensile strength and strain capacities of high-strength concrete (HSC) can be overcome by the addition of steel fibers. This paper investigated the mechanical properties of high-strength steel fiber-reinforced concrete. The properties included compressive and splitting tensile strengths, modulus of rupture, and toughness index. The steel fibers were added at the volume fractions of 0.5%, 1.0%, 1.5%, and 2.0%. The compressive strength of the fiber-reinforced concrete reached a maximum at 1.5% volume fraction, being a 15.3% improvement over the HSC. The splitting tensile strength and modulus of rupture of the fiber-reinforced concrete improved with increasing the volume fraction, achieving 98.3% and 126.6% improvements, respectively, at 2.0% Volume fraction. The toughness index of the fiber-rein forced concrete improved with increasing the fraction. The indexes 15, I-10, and I-30 registered values of 6.5, 11.8, and 20.6, respectively, at 2.05% fraction. Strength models were established to predict the compressive and splitting tensile strengths and modulus of rupture of the fiber-reinforced concrete. The models give predictions matching the measurements. (C) 2004 Elsevier Ltd. All rights reserved.