以旧轮胎橡胶颗粒等体积取代混凝土中的砂子,取代量分别为砂子体积的5%、10%、15%、20%、25%、30%、40%、50%、60%、80%、100%.研究了混凝土抗压强度随取代量的增加的变化规律.用显微硬度方法测试了橡胶颗粒与水泥基体界面过渡区的结构,并与石子水泥界面过渡区的结构进行了比较.发现随橡胶颗粒取代砂子量的增加,混凝土的抗压强度降低,体积取代量小于25%时,抗压强度降低较快;而取代量在25%～50%之间时,强度降低较为缓慢;取代量大于50%时,抗压强度又较快降低.显微硬度测试表明石子与水泥基体界面过渡区范围在85μm左右,而橡胶水泥基体界面过渡区范围在130μm左右,而且在橡胶颗粒周围45μm左右范围无法测得显微硬度,扫描电镜分析证明,橡胶颗粒与水泥基体间存在孔隙.
参考文献
| [1] | Topcu I B;Avcular N .Collision behaviors of rubberized concrete[J].Cement and Concrete Research,1997,27(12):1893. |
| [2] | C.E. Pierce;M.C. Blackwell .Potential of scrap tire rubber as lightweight aggregate in flowable fill[J].Waste Management,2003(3):197-208. |
| [3] | Rafat Siddique;Tarun R. Naik .Properties of concrete containing scrap-tire rubber--an overview[J].Waste Management,2004(6):563-569. |
| [4] | Benazzouk A et al.Physico-mechanical properties of aerated cement composites containing shredded rubber waste[J].Cement and Concrete Composites,2006,28:650. |
| [5] | Hema'ndez-Olivares F et al.Fatigue behaviour of recycled tyre rubber-filled concrete and its implications in the design of rigid pavements[J].Construction and Building Materials,2007,21:1918. |
| [6] | Zheng L;Sharon Huo X;Yuan Y .Experimental investigation on dynamic properties of rubberized concrete[J].Construction and Building Materials,2008,22:939. |
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