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首页> 外文期刊>Construction and Building Materials >Enhancement mechanism of skid resistance in preventive maintenance of asphalt pavement by steel slag based on micro-surfacing
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Enhancement mechanism of skid resistance in preventive maintenance of asphalt pavement by steel slag based on micro-surfacing

机译：基于微表层的钢渣沥青路面预防性养护的防滑性增强机理

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摘要

Steel slag is nowadays widely used as aggregates for asphalt pavement construction. It can minimize the environment pollution resulted from reducing natural aggregate consumption and recycling solid waste. However, there are few studies on application of steel slag in the preventive maintenance and its enhancement mechanism on surface skid resistance is still unknown. Laser scanning technic and digital analysis method were combined in this study to explore this issue. The morphology of basalt and steel slag was firstly quantified by imaging analysis and then used as fundamental backup for further explanation. Profile features of micro-surfacing samples containing steel slag were captured and studied. Meanwhile, wet track abrasion test and loaded wheel test were conducted to verify mechanical feasibility of using steel slag in the micro-surfacing. Results show that replacing basalt with steel slag could increase the positive texture significantly, due to the morphological differences between steel slag and natural aggregates. Positive texture contribution and peak profile contribution of steel slag can guide to design micro-surfacing with good skid resistance. Abrasion losses, lateral and vertical displacement are all decreased after replacing basalt with steel slag due to a stronger interlocking structure, indicating that steel slag can increase the ability of micro-surfacing to resist traffic loading. (C) 2019 Elsevier Ltd. All rights reserved.
机译：如今，钢渣被广泛用作沥青路面施工的骨料。它可以减少由于减少天然骨料消耗和回收固体废物而造成的环境污染。然而，关于钢渣在预防性维护中的应用的研究很少，其对表面防滑性的增强机理仍是未知的。本研究结合了激光扫描技术和数字分析方法来探讨这一问题。首先通过成像分析对玄武岩和钢渣的形态进行定量，然后将其用作基础备份以进一步解释。捕获并研究了含有钢渣的微表层样品的轮廓特征。同时，进行了湿履带磨损试验和负载轮试验，以验证在微堆焊中使用钢渣的机械可行性。结果表明，由于钢渣与天然骨料之间的形态差异，用钢渣代替玄武岩可以显着增加正纹理。钢渣的正织构贡献和峰值轮廓贡献可指导设计具有良好防滑性的微表层。用钢渣代替玄武岩后，由于具有更强的互锁结构，磨损损失，横向和垂直位移都降低了，这表明钢渣可以提高微表层抵抗交通负荷的能力。 （C）2019 Elsevier Ltd.保留所有权利。

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