Dynamic Compression Mechanical Characteristics and Energy Dissipation Law of Basalt Fiber Reinforced Concrete Under Different Curing Conditions

WANG Dapeng; WU Kai

doi:10.13204/j.gyjzG22082212

Volume 53 Issue 4

Apr. 2023

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WANG Dapeng, WU Kai. Dynamic Compression Mechanical Characteristics and Energy Dissipation Law of Basalt Fiber Reinforced Concrete Under Different Curing Conditions[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(4): 173-179. doi: 10.13204/j.gyjzG22082212

Citation:

WANG Dapeng, WU Kai. Dynamic Compression Mechanical Characteristics and Energy Dissipation Law of Basalt Fiber Reinforced Concrete Under Different Curing Conditions[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(4): 173-179. doi: 10.13204/j.gyjzG22082212

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Dynamic Compression Mechanical Characteristics and Energy Dissipation Law of Basalt Fiber Reinforced Concrete Under Different Curing Conditions

doi: 10.13204/j.gyjzG22082212

WANG Dapeng¹,
WU Kai²

1. Housing and Urban-Rural Development Bureau of Zhifu District, Yantai 264001, China;
2. Department of Civil Engineering, Tianjin University, Tianjin 300072, China

Received Date: 2022-08-22
Available Online: 2023-07-01

Abstract

Abstract

In order to explore the effect of curing conditions on the mechanical properties of basalt fiber reinforced concrete under impact load, the dynamic uniaxial compression tests of basalt fiber reinforced concrete with different curing ages (1,3,7,14,28 d) and curing relative humidity (35%,55%,75%,95%) were carried out with split Hopkinson compression bar test device (SHPB). The effects of curing age and relative humidity on the average strain rate, peak stress, energy dissipation and fractal dimension of the specimens were analyzed. The results showed that under the same impact load, the average strain rate of specimens would decrease with the increase of curing age and relative humidity. The curing age had an exponential negative correlation with the average strain rate and an exponential positive correlation with the peak stress. The energy time history curve of the specimen under impact load could be divided into three stages. The transmission energy, dissipation energy and crushing energy density increased with the increase of curing age and relative humidity, and the reflection energy decreased with it. The increase of curing age and relative humidity would increase the hydration products of the specimen andenhance the integrity of the specimen. When the curing relative humidity was 95%, compared with the specimens with the curing age of 1 d, the decrease of the fractal dimension of the specimens with the curing age of 3 d, 7 d, 14 d and 28 d was 8.61%, 13.91%, 23.58% and 26.68% respectively. The reduction of curing age and relative humidity would increase the fracture degree of the specimen, and the fractal dimension would increase.
- basalt fiber,
- curing age,
- relative humidity,
- peak stress,
- crushing energy consumption density,
- fractal dimension

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References(31)

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