Study On Stress-strain Characteristics Of Plastic Concrete
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Abstract:
In order to characterize the relationship of stress-strain of plastic concrete, the single-axle compressive tests were conducted with eight mix proportions and 48 specimens. Through the analysis of the test results, the typical stress-strain curves were obtained which showed obvious subsection characteristics. The curves were analyzed from the perspectives of strain, stress, tangent slope, and crack, and were compared with the stress-strain curves of traditional concrete, thus the stress-strain characteristics of the whole process of plastic concrete were obtained. Moreover, the regularity of stress-strain curves was investigated, which indicated that the ε-lnσ relationship of the rising section is in line with the polynomial of degree six and the ε-σ relationship of the declining section is better represented with the logistic model. The function expression for each subsection was proposed. The results are of important significance to the test of elastic modulus, design, and construction of plastic concrete.
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