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A platform for research: civil engineering, architecture and urbanism
Study on the mechanical properties of post-filling coarse aggregate concrete under multiaxial compression
Abstract Post-filling coarse aggregate concrete (PFCC) is a new type of concrete that achieves energy conservation and emission reduction by optimizing the material proportion. The post-filled coarse aggregate can save the amount of cement material, improve the strength, and prolong the service life. This paper conducted multiaxial compression tests on the PFCC cubes, analyzed the strength rules under different post-filling ratios and different stress ratios, and proposed a failure criterion applicable to PFCC. The results indicated that the peak strength of the maximum principal stress under multiaxial compression was always greater than the uniaxial compressive strength under the same post-filling ratio, and the strength change was affected by both the stress ratio and the post-filling ratio. Under the same post-filling ratio, with the stress ratio (triaxial compression as the intermediate principal force) increasing, the strength first increases and then decreases. Both the uniaxial and multiaxial compressive strength reached the highest at the post-filling ratio of 20%. The failure criteria for PFCC under biaxial and triaxial compression have been established, and the calculated values agree with the test values. This study provides reference and research data for studying PFCC under complex stress environments.
Highlights The mechanical properties of post-filling coarse aggregate concrete under multiaxial compression were studied. The optimal post-filling ratio of coarse aggregate is 20% based on test results. Both uniaxial and multiaxial compressive strength vary with the increase of PFR, first increasing and then decreasing.
Study on the mechanical properties of post-filling coarse aggregate concrete under multiaxial compression
Abstract Post-filling coarse aggregate concrete (PFCC) is a new type of concrete that achieves energy conservation and emission reduction by optimizing the material proportion. The post-filled coarse aggregate can save the amount of cement material, improve the strength, and prolong the service life. This paper conducted multiaxial compression tests on the PFCC cubes, analyzed the strength rules under different post-filling ratios and different stress ratios, and proposed a failure criterion applicable to PFCC. The results indicated that the peak strength of the maximum principal stress under multiaxial compression was always greater than the uniaxial compressive strength under the same post-filling ratio, and the strength change was affected by both the stress ratio and the post-filling ratio. Under the same post-filling ratio, with the stress ratio (triaxial compression as the intermediate principal force) increasing, the strength first increases and then decreases. Both the uniaxial and multiaxial compressive strength reached the highest at the post-filling ratio of 20%. The failure criteria for PFCC under biaxial and triaxial compression have been established, and the calculated values agree with the test values. This study provides reference and research data for studying PFCC under complex stress environments.
Highlights The mechanical properties of post-filling coarse aggregate concrete under multiaxial compression were studied. The optimal post-filling ratio of coarse aggregate is 20% based on test results. Both uniaxial and multiaxial compressive strength vary with the increase of PFR, first increasing and then decreasing.
Study on the mechanical properties of post-filling coarse aggregate concrete under multiaxial compression
Li, Lu (author) / Jia, Jinqing (author)
2024-01-30
Article (Journal)
Electronic Resource
English
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