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| 正交法分析再生粗骨料混凝土的基本性能 | |
| 引用本文： | 陈爱玖,王静,章青.正交法分析再生粗骨料混凝土的基本性能[J].混凝土,2009(1). |
| 作者姓名： | 陈爱玖 王静 章青 |
| 作者单位： | 1. 河海大学工程力学系,江苏,南京,210098;华北水利水电学院土木与交通学院,河南,郑州,450011 2. 华北水利水电学院土木与交通学院,河南,郑州,450011 3. 河海大学工程力学系,江苏,南京,210098 |
| 基金项目： | 国家自然科学基金，郑州市科技攻关项目 |
| 摘 要： | 采用正交法试验分析了再生粗骨料掺量、聚丙烯纤维掺量和引气减水剂掺量3个配合比因素对再生混凝土抗压强度、劈拉强度和抗压弹模的影响,用再生粗骨料掺量为70%、聚丙烯纤维掺量为O.7%和引气减水剂掺量为0.2%的参数进行配合比设计,可使设计强度为C30的再生混凝土获得良好的和易性和较高的强度.通过对混凝土拌合物含气量的测定,分析得出了随着引气减水剂掺量的增加,含气量增加1%时,再生混凝土的抗压强度降低4.1%,劈拉强度降低7.7%,抗压弹模降低3.9%.将再生粗骨料经机械强化后,可使再生混凝土的抗压强度提高约13%.结果表明:引气减水剂和再生粗骨料掺量是影响这3个力学性能的重要因素. |
| 关 键 词： | 再生粗骨料 再生混凝土 强度 正交试验 |
Basic properties of recycled coarse aggregate concrete by orthogonal analysis |
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| CHEN Ai-jiu,WANG Jing,ZHANG Qing.Basic properties of recycled coarse aggregate concrete by orthogonal analysis[J].Concrete,2009(1). | |
| Authors: | CHEN Ai-jiu WANG Jing ZHANG Qing |
| Affiliation: | 1.Department of Engineering Mechanics;HoHai University;Nanjing 210098;China;2.School of Civil Engineering and Communication;North China University of Water Conservancy and Electric Power;Zhengzhou 450011;China |
| Abstract: | The guantity of recycled coarse aggregate,polypropylene fiber and gas-lifting water-reducing agent affecting on the compressive strength,splitting tensile strength and compressive elastic modulus of recycled aggregate concrete(RAC) is studied in orthogonal experiment design.It calls for using the percentages of 70% as recycled coarse aggregate,0.7% as polypropylene fiber and 0.2 as gas-lifting water-reducing agent to make the design of mix proportion,we can obtain better workability and strength.It was foun... |
| Keywords: | recycled coarse aggregate recycled concrete strength orthogonal experiment |
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