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低噪微表处混合料矿料级配优化设计

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Keywords: 道路工程,低噪微表处,振实堆积密度,矿料级配,配合比,优化设计

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Abstract:

微表处养护技术在广泛应用的同时仍然存在着噪声过大、抗松散性能不足、耐久性差的缺点,制约着微表处养护技术更好地应用。针对微表处噪声过大,配合比设计不够完善的问题,提出了低噪微表处的矿料级配以及矿料级配优化设计方法——堆积密度法。室内试验表明,矿料在振实状态下的堆积密度越大,低噪微表处的湿轮磨耗值越小,负荷轮黏附砂量越大,即微表处混合料的技术性能越好。研究成果在广西坛(洛)—百(色)高速公路2012年养护工程中得到了应用,现场测试结果表明,该项目所采用的低噪微表处具有低噪、平整密实、抗滑性能优越、使用性能优良等优点。

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