| 引用本文: | 胡琼,陈伟伟,邹超英.再生混凝土粘结性能试验研究[J].哈尔滨工业大学学报,2010,42(12):1849.DOI:10.11918/j.issn.0367-6234.2010.12.001 |
| HU Qiong,CHEN Wei-wei,ZOU Chao-ying.Experimental study on bonding properties of recycled concrete[J].Journal of Harbin Institute of Technology,2010,42(12):1849.DOI:10.11918/j.issn.0367-6234.2010.12.001 |
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| 摘要: |
| 为进一步在实际工程中推广应用再生混凝土,通过再生混凝土拔出试验,研究再生粗骨料、细骨料取代率,水灰比及锚固条件对再生混凝土抗压强度、粘结性能的影响.结果表明:再生混凝土的粘结强度随再生粗骨料取代率增加而增加,在粗骨料取代率约为60%时取得最大值,随后降低;再生混凝土的粘结强度随再生细骨料取代率增加而降低;再生混凝土的粘结强度优于普通混凝土;过多掺入再生粗、细骨料会降低再生混凝土抗压强度;降低水灰比可提高再生混凝土抗压强度及粘结强度,水灰比变化对再生混凝土抗压强度的影响较普通混凝土小;适当增加保护层厚度(≤3 d)及锚固长度可以提高再生混凝土粘结强度. |
| 关键词: 再生混凝土 粘结性能 再生骨料取代率 保护层厚度 锚固长度 |
| DOI：10.11918/j.issn.0367-6234.2010.12.001 |
| 分类号:TU528 |
| 基金项目:国家自然科学基金资助项目(50278025);黑龙江省自然科学基金资助项目(D0314) |
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| Experimental study on bonding properties of recycled concrete |
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HU Qiong1, CHEN Wei-wei2, ZOU Chao-ying1
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1.School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China;2.Wenzhou Architecture Design & Research Institute,Wenzhou 325000,China
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| Abstract: |
| To promote the use of recycled concrete in practical engineering,pull-out tests were carried out to study the influence of Coarse/Fine Recycled Concrete Aggregate(CRCA/FRCA) replacement rate,water-cement ratio and the anchoring conditions on the compressive strength and bonding properties of Recycled Aggregate Concrete(RAC).The results show that: the bond strength of RAC rises with the increasing of CRCA replacement rate,and arrives at the maximum when the rate= 60%,then reduces;the bond strength of RAC reduces while the FRCA replacement rate increases,and it is better than that of ordinary concrete;too much CRCA/FRCA replacement will reduce the compressive strength of RAC;lower water-cement ratio can improve the compressive strength and bond strength of RAC,and water-cement ratio variation has less influence on RAC than that of ordinary concrete;appropriate increase in the thickness of concrete cover(≤3 d) and the anchorage length can increase the bond strength of RAC.In addition,by concerning the relationship between the bond strength of RAC and CRCA/FRCA replacement rate,water-cement ratio,compressive strength,anchorage length,a formula was established. |
| Key words: recycled concrete bonding property recycled aggregate replacement ratio concrete cover thickness anchorage development length |
