Prediction of the Macroscopic Mechanics Properties of Recycled Aggregate Concrete Based on the Mesoscopic Equivalence Theory

CHEN Haiyu; XU Fuwei

doi:10.21656/1000-0887.420079

Volume 43 Issue 7

Jul. 2022

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CHEN Haiyu, XU Fuwei. Prediction of the Macroscopic Mechanics Properties of Recycled Aggregate Concrete Based on the Mesoscopic Equivalence Theory[J]. Applied Mathematics and Mechanics, 2022, 43(7): 772-782. doi: 10.21656/1000-0887.420079

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Prediction of the Macroscopic Mechanics Properties of Recycled Aggregate Concrete Based on the Mesoscopic Equivalence Theory

doi: 10.21656/1000-0887.420079

School of Civil Engineering and Architecture, Hubei University of Arts and Science, Xiangyang, Hubei 441053, P.R.China

Received Date: 2021-03-29
Rev Recd Date: 2021-11-12
Publish Date: 2022-07-15

Abstract

Abstract

Prediction of the influence of each component of recycled aggregate concrete on the macroscopic mechanics properties of recycled aggregate concrete is a way to develop the basic mechanics properties of recycled aggregate concrete. For this purpose, a meso-equivalent model was established according to the meso-structure composition of recycled aggregate concrete. Based on the torsional deformation theory, the meso-inclusion theory, the elastic equivalent thought and the M-T model, the prediction model for macroscopic mechanics properties of recycled aggregate concrete composed of natural aggregate, old interface, old cement mortar, new interface and new cement mortar, was deduced. The prediction results show that, with the increase of the recycled aggregate replacement rate, the content of cement mortar and the porosity of recycled aggregate concrete rise, resulting in the increase of Poisson’s ratio of recycled aggregate concrete, and the decreases of the elastic modulus, the shear modulus and the volume modulus. The model well predicts the changing trend of the macroscopic mechanics properties of recycled aggregate concrete with the increase of the recycled aggregate replacement rate, and provides a simple and practical new way to the research and analysis of the basic mechanics properties of recycled aggregate concrete.
- mesoscopic equivalence,
- recycled concrete,
- macroscopic mechanics property,
- torsional deformation

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References

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