| 摘要: |
| 采用等体积替代河砂的方式将废弃塑料颗粒掺入到混凝土中，废弃塑料颗粒掺量分别为胶凝材料质量的0%，2%，5%，7%，10%和15%.测试掺废弃塑料颗粒混凝土28d干堆积密度，探究废弃塑料颗粒掺量对混凝土力学性能和弯曲变形性能的影响.结果表明：与基准混凝土相比，掺废弃塑料颗粒混凝土28d干堆积密度有一定程度降低；随着废弃塑料颗粒掺量的增加，混凝土7，28，60d立方体抗压强度和28d轴心抗压强度均呈现先增加而后降低的趋势；随着废弃塑料颗粒掺量的增加，混凝土28d弹性模量呈现明显降低的趋势；与基准混凝土相比，掺废弃塑料颗粒混凝土弯曲延性（28d）略有提高. |
| 关键词: 废弃塑料颗粒 等体积取代 混凝土 力学性能 弹性模量 弯曲变形性能 |
| DOI：103969/jissn1007 9629201501022 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（50908136，51079136） |
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| Mechanical and Bending Deformation Performances of Concrete with Waste Plastic Granules Added |
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YANG Shutong, SUN Zetian
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College of Engineering, Ocean University of China, Qingdao 266100, China
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| Abstract: |
| Waste plastic granules were introduced into concrete as partial replacement of river sands with equal volume. The use levels of waste plastic granule were 0%, 2%, 5%, 7%, 10% and 15% based on the mass of cementing material. The 28d dry bulk density of concrete with waste plastic granules added was tested. The influences of use level of waste plastic granule on the mechanical and bending deformation performances of concrete were studied. Results show that the 28d dry bulk density of concrete with waste plastic granules added is lower compared with that of control concrete. Both the cubic compressive strength（7，28，60d） and axial compressive strength（28d） of concrete increase to the maximum and then decrease with increasing use level of waste plastic granule. The 28d elastic modulus of concrete decreases with increasing use level of waste plastic granule. The bending ductility（28d） of concrete with waste plastic granules added is slightly higher compared with that of control concrete. |
| Key words: waste plastic granule replacement with equal volume concrete mechanical performance elastic modulus bending deformation performance |
