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Mechanical Test and Constitutive Model of Recycled Plastic Fiber Reinforced Recycled Concrete by Shaolong Guo; Dongjian Zheng; Lihong Zhao; Qun Lu; Xiaoke Liu is a Engineering article available to read on EtoBox.

What is Mechanical Test and Constitutive Model of Recycled Plastic Fiber Reinforced Recycled Concrete about?

The use of the Recycled Plastic Fiber Reinforced Recycled Concrete (RPFRRC) can not only improve the mechanical properties of concrete, but it also can reuse the waste. The uniaxial compression test, quasi-triaxial compression test and bending-tension test of RPFRRC are carried out. Experimental results show that the compressive and flexural tensile strength of the RPFRRC can be improved by adding an appropriate content of recycled plastic fibers. For constant fiber content, the fiber length has a great influence on the compressive strength and flexural tensile strength of the RPFRRC. The confining pressure and the fiber volume ratio have a relatively large influence on the stress-strain curve of RPFRRC specimens. Considering the shortcomings of the Ottosen model, a three-dimensional constitutive model which is suitable for describing the triaxial compressive stress-strain relationship of RPFRRC is proposed. This model uses the improved equation as the equivalent uniaxial equation for the three-dimensional stress state of fiber reinforced concrete. The quasi-triaxial compression test data of the RPFRRC shows that the improved model is more consistent with the test results than the

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Author

Shaolong Guo; Dongjian Zheng; Lihong Zhao; Qun Lu; Xiaoke Liu

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Engineering (Physical Sciences)