| 摘要: |
| 采用C30混凝土制备的再生粗、细骨料对不同强度等级及不同置换率再生混凝土进行了抗透气性能试验研究.结果表明：当粗骨料为再生粗骨料、细骨料为天然砂时，再生粗骨料置换率对再生混凝土透气系数的影响较小；当粗骨料采用天然碎石时，再生细骨料置换率对再生混凝土透气系数的影响较大，其透气系数随着再生细骨料置换率增加而增大. |
| 关键词: 再生混凝土 透气性 耐久性 |
| DOI：103969/j.issn1007 9629201401026 |
| 分类号: |
| 基金项目:辽宁省教育厅资助项目（2008282）；辽宁工程技术大学博士后基金资助项目（70DZ45） |
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| Effect of Recycled Coarse and Fine Aggregate onAir Permeability of Concrete |
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CUI Zhenglong1, TONG Huabin1, LU Shasha1, WANG Zhenshuang2
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1.College of Civil and Architectural Engineering, Liaoning Technical University, Fuxin 123000, China;2.Advisory Company of Investment, Dongbei University of Finance and Economics, Dalian 116025, China
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| Abstract: |
| Recycled coarse and fine aggregates prepared by used C30 concrete was used to study the air permeability resistance of recycled concrete with different strength grades and different replacement rate. Results show that: with use of recycled coarse aggregate as coarse aggregate and natural sand as fine aggregate，the replacement rate of recycled coarse aggregate have little effect on air permeability coefficient of recycled concrete; but with use of natural gravel as coarse aggregate，the replacement rate of recycled fine aggregate have significant impact on air permeability coefficient of recycled concrete，its air permeability coefficient increases as the replacement rate of recycled fine aggregate increase. |
| Key words: recycled aggregate concrete permeability durability |
