Experimental Study on Mechanical Properties of Basalt-Fiber-Reinforced Nano-SiO<sub>2</sub> Concrete After Being Subjected to High Temperatures

LIU Huaxin; ZHENG Taiyuan

doi:10.13204/j.gyjzG20092909

Volume 52 Issue 2

Feb. 2022

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2022 > 52(2): 18-23,107

LIU Huaxin, ZHENG Taiyuan. Experimental Study on Mechanical Properties of Basalt-Fiber-Reinforced Nano-SiO2 Concrete After Being Subjected to High Temperatures[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(2): 18-23,107. doi: 10.13204/j.gyjzG20092909

Citation:

LIU Huaxin, ZHENG Taiyuan. Experimental Study on Mechanical Properties of Basalt-Fiber-Reinforced Nano-SiO₂ Concrete After Being Subjected to High Temperatures[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(2): 18-23,107. doi: 10.13204/j.gyjzG20092909

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Experimental Study on Mechanical Properties of Basalt-Fiber-Reinforced Nano-SiO₂ Concrete After Being Subjected to High Temperatures

doi: 10.13204/j.gyjzG20092909

LIU Huaxin^1,2,
ZHENG Taiyuan²

1. Southeast University, Key Laboratory of Concrete and Pre-Stressed Concrete Structures of Ministry of Education, Nanjing 210018, China;
2. School of Civil Engineering and Architecture, Liaoning University of Technology, Jinzhou 121001, China

Received Date: 2020-09-29
Available Online: 2022-06-30
Publish Date: 2022-02-20

Abstract

Abstract

The compressive, splitting tensile and flexural tests of plain concrete, nano-SiO₂ concrete and basalt fiber nano-SiO₂ concrete under high temperatures were carried out, and the prediction model of concrete strength that was established. According to the results, the compressive strength of each group reached a peak value at 400 ℃, at that time, each group of concrete at normal temperature increased by about 3.5% to 6.8%, and then decreased gradually, and the splitting tensile strength and flexural strength decreased gradually with the increase of temperature, at 800 ℃, the residual ratios of cracking and pulling strength and the residual ratios of flexural strength were 27.6% and 36.2%, respectively. Adding nano-SiO₂ could improved the compressive, splitting tensile and flexural strength of plain concrete. The compressive strength, splitting tensile strength and flexural strength of nano-SiO₂ concrete after being subjected to 800 ℃ high temperature were increased by 33.7%,15.6% and 17.2% respectively. The accuracy of concrete strength prediction after being subjected to high temperatures was high.
- basalt fiber,
- nano-SiO₂ concrete,
- high temperature,
- mechanical property

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References

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