STUDY ON COMPRESSIVE CREEP PROPERTIES OF RECYCLED COARSE AGGREGATE CONCRETE

CHEN Junbo

doi:10.13204/j.gyjzG20052201

Volume 51 Issue 7

Nov. 2021

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CHEN Junbo. STUDY ON COMPRESSIVE CREEP PROPERTIES OF RECYCLED COARSE AGGREGATE CONCRETE[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(7): 162-169. doi: 10.13204/j.gyjzG20052201

Citation:

CHEN Junbo. STUDY ON COMPRESSIVE CREEP PROPERTIES OF RECYCLED COARSE AGGREGATE CONCRETE[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(7): 162-169. doi: 10.13204/j.gyjzG20052201

CHEN Junbo. STUDY ON COMPRESSIVE CREEP PROPERTIES OF RECYCLED COARSE AGGREGATE CONCRETE[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(7): 162-169. doi: 10.13204/j.gyjzG20052201

Citation:

CHEN Junbo. STUDY ON COMPRESSIVE CREEP PROPERTIES OF RECYCLED COARSE AGGREGATE CONCRETE[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(7): 162-169. doi: 10.13204/j.gyjzG20052201

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STUDY ON COMPRESSIVE CREEP PROPERTIES OF RECYCLED COARSE AGGREGATE CONCRETE

doi: 10.13204/j.gyjzG20052201

CHEN Junbo

Zhengzhou Vocational University of Information and Technology, Zhengzhou 450046, China

Received Date: 2020-05-22
Available Online: 2021-11-11

Abstract

Abstract

According to replacement rates of recycled coarse aggregate (RCA) of 0%, 50%, 100%, the compressive creep tests of recycled course aggreagte concrete were conducted. The creep properties of recycled coarse aggregate concrete (RAC) were studied. The experimental results indicated that both of the basic creep and total creep of RAC increased with the increase of replacement rates of RCA, and the effect of replacement rates on total creep of RAC was bigger than that of basic creep. Based on the experimental results, the interaction mechanism recycled coarse aggregate, the new mortar and old mortar in the creep process of RAC was studied, a creep calculation model reflecting the creep relation of new mortar, old mortar and RAC was introduced,which was the modified Neville creep model, and the creep of old mortar in the basic creep or the total creep process of RAC was calculated by the modified creep model. Based on software ANSYS, a two-dimensional random convex aggregate model of RAC was put forward to verify the reliability of the modified creep model. In addition, the influence of the random distribution of RCA on the creep of RAC was studied by the finite element model. Finally, a creep prediction model was constructed, which could be used to compute the creep of old mortar and RAC, and also reflect the content and properties of the old mortar in RAC based on the modified creep model.
- recycled coarse aggregate concrete,
- basic creep,
- total creep,
- two-dimensional random convex aggregate model

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References(19)

References

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