Utilization of steel slag as aggregates for stone mastic asphalt (SMA) mixtures
Utilization of steel slag as aggregates for stone mastic asphalt (SMA) mixtures
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DOI：
10.1016/j.buildenv.2006.06.008
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发表时间：
2007-07-01
影响因子：
7.4
通讯作者：
Chen, Yongchun
中科院分区：
文献类型：
--
作者：
Wu, Shaopeng;Xue, Yongjie;Chen, Yongchun
钢渣是一种副产品，占综合钢厂铁产量的15%-20%。其中大部分堆放在堆渣场，给中国带来了许多严重的环境问题。探讨了钢渣作为集料在碎石玛蹄脂沥青混合料中应用的可行性，并对其性能进行了评价。采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和压汞测孔仪(MIP)对聚集体的组成、结构和形态进行了研究。对钢渣SMA混合料的体积性能和路用性能进行了评价，并与玄武岩作为集料进行了比较。结果表明，掺钢渣的SMA混合料的体积性能符合相关规范，7d后膨胀率小于1%。与玄武岩相比，钢渣作为集料改善了SMA混合料的高温性能和低温抗裂性能。钢渣在使用中的SMA路面在平整度和英国摆数(BPN)系数方面也表现出优异的性能。(C)2006爱思唯尔有限公司。保留所有权利。
Steel slag is a byproduct making up a portion of 15-20% of iron output in an integrated steel mill. Most of them are deposited in slag storing yards and thus results in many serious environment problems in China. This paper aims to explore the feasibility of utilizing steel slag as aggregates in stone mastic asphalt (SMA) mixtures, and properties of such asphalt mixtures are evaluated as well. X-ray diffraction (XRD), scanning electron microscopy (SEM), and mercury intrusion porosimetry (MIP) were employed to study the compositions, structure and morphology of aggregates. Volume properties and pavement performances of SMA mixture with steel slag were also evaluated as compared to that with basalt as aggregates. Results indicated that volume properties of SMA mixture with steel slag satisfied the related specifications and expansion rate was below 1% after 7 days. When compared with basalt, high temperature property and the resistance to low temperature cracking of SMA mixture were improved by using steel slag as aggregate. In-service SMA pavement with steel slag also presented excellent performance on roughness and British Pendulum Number (BPN) coefficient of surface. (c) 2006 Elsevier Ltd. All rights reserved.