ATB-25厂拌热再生混合料在路面大修工程中的应用
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摘要
为了循环利用路面回收材料,节省养护投资成本,依托G20青银高速靖边至王圈梁段的路面大中修工程,通过对沥青路面回收材料的检测评价、厂拌热再生沥青稳定碎石混合料的配合比设计、厂拌热再生拌合楼的改造以及铺筑试验段验证了厂拌热再生混合料的路用性能。结果表明:RAP掺量25%、改性沥青掺量2.3%的厂拌热再生混合料马歇尔残留稳定度为85.03%、冻融劈裂强度比78.9%、车辙试验动稳定度4 230次·mm~(-1),相比常规热拌沥青混合料抗车辙能力增强。再生混合料经济效益明显,可直接节约成本约15%。
In order to recycle pavement materials and save maintenance investment cost,relying on the pavement major and intermediate overhaul projects from Jingbian to Wangquanliang section of G20 Qingyin Expressway,the pavement performance of the recycled hot mix was verified by testing and evaluating the recycling materials of asphalt pavement,mix proportion design of recycled hot mix asphalt stabilized macadam,modification of recycled asphalt mixing plant and paving test section.The results show that when the RAP content is 25%,the modified asphalt content is 2.3%,the Marshall residual stability is 85.03%,the freeze-thaw split strength ratio is 78.9%,and the dynamic stability of the rutting test is 4 230 times/mm,the rutting resistance performance of the recycled hot mix asphalt is better than that of the conventional hot mix asphalt mixture.The economic benefit of recycled mixture is obvious,and the cost can be saved by about 15%.
In order to recycle pavement materials and save maintenance investment cost,relying on the pavement major and intermediate overhaul projects from Jingbian to Wangquanliang section of G20 Qingyin Expressway,the pavement performance of the recycled hot mix was verified by testing and evaluating the recycling materials of asphalt pavement,mix proportion design of recycled hot mix asphalt stabilized macadam,modification of recycled asphalt mixing plant and paving test section.The results show that when the RAP content is 25%,the modified asphalt content is 2.3%,the Marshall residual stability is 85.03%,the freeze-thaw split strength ratio is 78.9%,and the dynamic stability of the rutting test is 4 230 times/mm,the rutting resistance performance of the recycled hot mix asphalt is better than that of the conventional hot mix asphalt mixture.The economic benefit of recycled mixture is obvious,and the cost can be saved by about 15%.
引文
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[2]李庆瑞,王莎.厂拌热再生混合料的关键施工技术研究[J].筑路机械与施工机械化,2016,33(3):72-75.
[3]袁明园.厂拌热再生技术在合六叶高速公路养护工程中的应用[J].筑路机械与施工机械化,2014,31(1):72-74,78.
[4]朱钰,张亚财,牛龙,等.高掺量RAP厂拌热再生在干线公路养护中的应用[J].筑路机械与施工机械化,2017,34(5):73-77.
[5]朱得斌.玻璃纤维土工格栅在沥青路面施工中的应用[J].筑路机械与施工机械化,2018,35(6):112-115.
[6]胡志平,刘兴东.厂拌热再生在路面大中修工程中的应用[J].公路交通科技(应用技术版),2014(4):7-9.
[7]郝培文.改性沥青在我国的应用[J].中国公路,2017(10):43-44.
[8]熊剑平,李杨,喻峥嵘.厂拌热再生过程中旧沥青转移程度评价方法研究[J].筑路机械与施工机械化,2016,33(5):35-38.
[9]谢立扬,宋昌伟,梁兴文.国内外厂拌热再生设备的最新研究动态[J].筑路机械与施工机械化,2018,35(5):14-19.
[10]任拴哲.沥青路面厂拌热再生及其设备关键技术研究[D].西安:长安大学,2008.
[11]徐江涛,游小平,张慧,等.厂拌热再生设备第二烘干筒的设计分析[J].无线互联科技,2017(8):65-67.
[12]聂忆华,康彦晶,刘苹.旧沥青路面厂拌热再生利用经济效益分析模型研究[J].公路工程,2013(4):120-123.
[13]汪托,郝培文.回收沥青路面再利用节能减排效益分析[J].中外公路,2013(4):325-330.
[14]张争奇,张苛,姚晓光,等.厂拌热再生技术能耗与排放量化分析[J].江苏大学学报(自然科学版),2015,36(5):615-620.