EFFECT OF HEATING ON SHEAR STRENGTH IN WASTE PLASTIC LIGHTWEIGHT CONCRETE BY USING A NEW TEST SPECIMEN

Civil

Abstract

The re-use of plastic waste as an alternative to partial volume of sand in the concrete rids Iraq of harmful waste plastic piles as well as reduces demand for natural sand and dependence on remote sand quarries. Moreover, encourages lightweight concrete (LWC) production, which reduce the loads and increases the efficiency of the insulation. Certainly, when speech is going about the waste plastic, it should go through its weak point, which is heating. This study aims to investigate the shear properties (with different ratios of longitudinal steel reinforcement) of both structural & non-structural waste plastic LWC before and after heat exposure. This study involves many trails in order to determine the efficiency of reusing waste plastic in the production of both structural & non-structural waste plastic LWC. A special new test specimen is presented here by the researcher called W-Shear Test specimen (WST) in order to achieve aims of this study. Twenty-four of W-ST specimens are cast in this study. They are divided into six groups; each group consists of four W-STs. In every group, three W-STs out of these four are reinforced with different longitudinal steel bars in order to investigate the failure behaviour. W-STs are cast from normal weight concert (NWC), structural and nonstructural LWC and tested before and after heat exposure to 200oC. These tests include slump, fresh density, dry density, compressive strength, tensile splitting strength, flexural strength, Young’s modulus, in addition to shear capacity (P) and slip (D) of W-STs. The results of this study support the re-use of plastic waste as a sand volume substitution of fine aggregate to produce LWC that resists shear stresses after heat exposure.