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| 摘要: |
| 对再生混凝土的单轴受压性能进行了系统的试验研究及分析,主要包括再生混凝土棱柱体抗压强度与立方体抗压强度的关系、圆柱体抗压强度与立方体抗压强度的关系、应力-应变全曲线、峰值应变、极限应变、弹性模量以及泊松比等.结果表明,再生混凝土的极限应变和泊松比与普通混凝土相比差别不大,但其他性能与普通混凝土相比存在较大差异,主要表现为峰值应变增加、弹性模量降低和脆性增加.进一步探讨了普通混凝土各基本力学性能指标间的关系对再生混凝土的适用性,提出了再生混凝土各性能指标的关系式. |
| 关键词: 再生混凝土,单轴受压性能,强度特征,变形特征 |
| DOI： |
| 分类号:TU528.59 |
| 基金项目:浙江省建设厅2006年建设新技术、新产品研制和推广项目(0638) |
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| Study on Mechanical Properties of Recycled Aggregate Concrete(Ⅰ)——Behaviour under Uniaxial Compression |
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LI Xu-ping
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| Abstract: |
| The behaviour of recycled aggregate concrete(RAC) under uniaxial compression were stuched.Extensive tests were conducted to investigate prism compressive strength to cube compressive strength ratio,cylinder compressive strength to cube compressive strength ratio,stress-strain curve,peak strain,ultimate strain and modulus of elasticity as well as Poisson's ratio.The results indicate that except for the Poisson's ratio and ultimate strain,the recycled aggregate concrete behaves in a different manner compared with normal concrete,it has larger peak strain,smaller elastic modulus and is more brittle.The applicability of the interrelationships of normal concrete to recycled aggregate concrete was evaluated and it was found that they could be applied to recycled aggregate concrete without modification.Based on the test results,some new correlations between mechanical properties for recycled aggregate concrete are proposed. |
| Key words: recycled aggregate concrete(RAC),behaviour under uniaxial compression,strength characteristics,deformation characteristics |
