Analysis on Effect Factors and Characteristics of Shear Properties for Interfaces Between Basalt and Concrete

DING Shijun; DING Mintao; MAN Yin; NIE Zhibao

doi:10.13204/j.gyjzG22060607

Volume 53 Issue 1

Jan. 2023

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DING Shijun, DING Mintao, MAN Yin, NIE Zhibao. Analysis on Effect Factors and Characteristics of Shear Properties for Interfaces Between Basalt and Concrete[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(1): 194-200. doi: 10.13204/j.gyjzG22060607

Citation:

DING Shijun, DING Mintao, MAN Yin, NIE Zhibao. Analysis on Effect Factors and Characteristics of Shear Properties for Interfaces Between Basalt and Concrete[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(1): 194-200. doi: 10.13204/j.gyjzG22060607

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Analysis on Effect Factors and Characteristics of Shear Properties for Interfaces Between Basalt and Concrete

doi: 10.13204/j.gyjzG22060607

China Electric Power Research Institute, Beijing 100055, China

Received Date: 2022-06-06
Available Online: 2023-05-25
Publish Date: 2023-01-20

Abstract

Abstract

In order to study effect factors and characteristics of shear properties for interfaces between basalt and concrete, a test device for testing properties was designed. Using basalt and C20 and C30 concrete from the same site, 30 indoor specimens for shear tests of rock-concrete interface were conducted. According to the load-displacement curve obtained by the test, the ultimate shear bearing capacity was determined, and the mean value of the interface shear strength was calculated. After normalizing the test results, the effects of interface scales, strength grades and curing ages of concrete, and rock integrity on shear properties of interfaces were studied. The test results showed that the device could effectively simulate and measure the shear properties of interfaces between rock and concrete; the shear capacity of specimens was strongly positive correlative with contact areas, but was not obvious correlative with height or diameter of shear planes. The statistical coefficient of variation for measured strength values increased with the decrease in height of the rock specimens; after the curing age for 7 days,the design strength grade of concrete had an inapparent effect on the interface shear strength under 90% confidence probability; when the curing age of concrete was more than 7 days, the increase in curing age had a positive effect on the interface strength,the longer the curing age of concrete was, the smaller the displacement at the shear strength was. The more intact the rock was, the higher the shear strength of interfaces between rock and concrete was.
- basalt-concrete interface,
- shear performance,
- influencing factor,
- model test

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References(24)

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