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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

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

doi: 10.13204/j.gyjzG20092909
  • Received Date: 2020-09-29
    Available Online: 2022-06-30
  • Publish Date: 2022-02-20
  • 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.
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