Basalt-PVA fiber synergistically enhances the flexural tensile and impact resistance of lightweight aggregate concrete

doi:10.19936/j.cnki.2096-8000.20220628.011

Abstract

Abstract: The flexural tensile strength, flexural tensile modulus and impact resistance of lightweight aggregate concrete mixed with basalt-PVA fiber were tested, and the effect of basalt-PVA fiber on the flexural tensile and impact resistance of lightweight aggregate concrete was obtained. The results show that fiber-mixed materials are better than fiber-only materials in improving the mechanical properties of lightweight aggregate concrete. When the basalt-PVA fiber content is 0.6% and the blending ratio is 1∶2, the bending resistance of lightweight aggregate concrete, tensile strength and flexural tensile modulus of elasticity have the largest increase, which are 22.19% and 23.78% higher than the benchmark group respectively. The dynamic compression performance test results are more consistent with the flexural tensile strength test results, when the amount is too large the strength of lightweight aggregates will decline, and even have negative effects. Finally, the mechanism of fiber-reinforced lightweight aggregate concrete was described and the Energy Dispersive Spectrometer (EDS) test analysis was carried out.

Key words: basalt-PVA fiber, lightweight aggregate concrete, flexural tensile strength, dynamic compression performance, EDS, composites

CLC Number:

TB332

LI Cheng-jin, LI Jing, XIA Jin-hong. Basalt-PVA fiber synergistically enhances the flexural tensile and impact resistance of lightweight aggregate concrete[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(6): 70-75.

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