Investigation of asphalt mixture containing demolition waste obtained from earthquake-damaged buildings
Investigation of asphalt mixture containing demolition waste obtained from earthquake-damaged buildings
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DOI：
10.1016/j.conbuildmat.2011.09.023
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发表时间：
2012-04-01
影响因子：
7.4
通讯作者：
Wang, Dongming
中科院分区：
文献类型：
--
作者：
Zhu, Jiqing;Wu, Shaopeng;Wang, Dongming
研究了汶川地震建筑物拆除垃圾沥青混合料的一些性能。将废弃物加工成再生骨料，与天然石灰石骨料一起用于沥青混合料中。针对再生骨料强度低、吸水性强的特点，采用液体硅树脂对再生骨料进行预处理。对再生集料进行了物理性能试验、预处理前后集料表面形貌试验、沥青混合料水稳定性试验、永久变形试验和三点弯曲试验。试验结果表明，用废液体硅树脂对再生骨料进行预处理，可提高再生骨料的强度、吸水性、与沥青的粘附性和表面形貌。再生集料的引入对沥青混合料的抗水性能和低温柔韧性有负面影响。而用废液体硅树脂对再生骨料进行预处理，可以改善再生骨料的上述性能。含再生骨料的沥青混合料具有更好的抗永久变形能力。用液体硅树脂对再生骨料进行预处理，会降低沥青混合料的永久变形抗力。但预处理后的再生集料沥青混合料仍具有上级抗高温永久变形能力。通过大量的试验研究表明，汶川地震后建筑物的拆迁废弃物可以作为再生骨料制备出性能良好的沥青混合料。(C)2011爱思唯尔有限公司保留所有权利。
Some properties of asphalt mixture containing demolition waste obtained from Wenchuan earthquake-damaged buildings were investigated in this paper. Waste materials were processed into recycled aggregate and used in asphalt mixture together with natural limestone aggregate. Because of the low strength and high absorption of recycled aggregate, a liquid silicone resin was used to pretreat the recycled aggregate. Various tests including physical properties test, surface morphology test of both untreated and pretreated recycled aggregate, moisture susceptibility test, permanent deformation test and three-point bending beam test of asphalt mixture were carried out. Experimental results indicated that the pretreatment of recycled aggregate by used liquid silicone resin improved the strength, absorption, adhesion with asphalt and surface morphology of recycled aggregate. The introduction of recycled aggregate had a negative effect on moisture resistance and low-temperature flexibility of asphalt mixture. However, the pretreatment of recycled aggregate by used liquid silicone resin can improve the properties mentioned above. Asphalt mixture containing recycled aggregate showed greater resistance to permanent deformation. The pretreatment of recycled aggregate by used liquid silicone resin tended to reduce the resistance of asphalt mixture to permanent deformation. However, asphalt mixture containing recycled aggregate is still superior in resistance to permanent deformation at high-temperature after pretreatment. Based on an extensive test program presented in this paper, it can be concluded that demolition waste obtained from Wenchuan earthquake-damaged buildings can be used as recycled aggregate to prepare asphalt mixture with satisfactory properties. (C) 2011 Elsevier Ltd. All rights reserved.