Experimental Study on Stress-Strain Curve of Recycled Coarse Aggregate Concrete under Uniaxial Compression

Abstract:

In order to study the mechanical properties of recycled concrete with the same strength, three kinds of recycled concrete have been made which their intensities reached C25, C30, C35 at the recycled coarse aggregate replacement ratios (0%, 50%, 100%), and severally completed the stress-strain curve test on the same strength of recycled concrete, separately analyzed the variance about failure pattern and peak strain, elastic modulus that all belonged to recycled concrete under the condition of the same strength. Studies have shown that the overall shape of recycled concretes stress-strain curves is similar to normal concretes under the same strength, and the difference is small, modulus of elasticity decreases with the increase of recycled coarse aggregate replacement ratio, while the peak strain basicly remains unchanged. Their curves can be used two stages respectively and also be represented by three fitting polynomial and rational expression, their descent stages steepened gradually with the increase of recycled coarse aggregate replacement rate.

• Periodical: Applied Mechanics and Materials (Volumes 357-360)
• Pages: 1415-1419
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.357-360.1415
• Online since: August 2013
• Authors: Zhi Heng Deng, Li Chen, Jian Qian, Chao Lou Meng
• Keywords: Recycled Coarse Aggregate Concrete, Replacement Ratio, Stress-Strain Curve

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