Stress-Strain Test of Manufactured Sand Concrete

Abstract

Abstract: In order to study the mechanical properties of manufactured sand concrete (MSC) under uniaxial load. The prism specimens of MSC were tested with the stone powder content (0%, 4%, 8%, 12%, 16% and 20%, mass fraction) and the concrete design strength grade (C20, C30 and C40) as variable parameters the compressive complete stress-strain curves were investigated and the uniaxial compression constitutive equations of MSC were fitted, compared with the river sand concrete(RSC). The results indicate that the stress-strain curves of MSC are similar with that of RSC. In the rising stage of the curve, MSC and RSC have basically coincident curve. However, in descending stage, the curves of MSC are much steeper than RSC. In addition, the peak stress and peak strain of the MSC specimens increase firstly and then decrease with the increase of stone powder content. When the mass fraction of stone powder is 8%, the peak strain of three different strength grades of MSC reaches the maximum value. The peak stress and elastic modulus of MSC increase with the increase of concrete design strength grade. The complete stress-strain curve of MSC based on the model of Sargin is in good agreement with the test curve.

Key words: manufactured sand concrete(MSC), river sand concrete(RSC), uniaxial compression, stone powder content, complete stress-strain curve

CLC Number:

TU528

XIE Kaizhong, LIU Zhenwei, GE Bingzhou, ZHU Maojin, XIN Ying. Stress-Strain Test of Manufactured Sand Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2020, 39(12): 3823-3831.

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