乳化沥青冷再生技术在高速大修工程中的应用研究
发布时间：2018-09-05 09:16
【摘要】：在高速公路改建过程中,将产生大量废旧沥青混凝土。在沥青路面改建过程中,使用冷再生技术,可以减少新集料的开采与使用、避免废料填埋所造成的占地及污染、减少碳排放,具有显著的经济效益与环境效益。本论文以京台高速合徐南段大修工程为依托,针对高速公路沥青路面改建养护工程特点,深入研究乳化沥青冷再生技术在高速大修工程中的应用技术。本论文研究内容主要包括以下四个方面：原材料选择与性能试验；乳化沥青冷再生混合料配合比设计；乳化沥青冷再生混合料路用性能研究(抗压回弹模量、低温抗裂性、高温稳定性等)；冷再生基层施工工艺与质量控制(级配、劈裂强度、压实度等)。本论文在大量室内试验和实际施工数据采集的基础上得出以下成果：(1)根据试件密度、马歇尔稳定度和劈裂强度三项指标对比,推荐采用二次击实法；(2)采用临界应变能密度指标评价乳化沥青冷再生混合料低温抗裂性能；分析水泥用量、新集料添加量对乳化沥青冷再生混合料低温抗裂性能的影响,得出水泥及新集料的适宜用量；(3)乳化沥青冷再生混合料20℃抗压回弹模量为893.12MPa-928.23MPa,15℃抗压回弹模量为949.03MPa～1001.97MPa,温度敏感性低；(4)分析冷再生基层施工数据,提出冷再生基层施工过程质量控制要点及冷再生基层施工质量验收标准。研究成果为进一步完善冷再生技术在高速公路养护工程中的应用技术体系奠定了基础。
[Abstract]:In the process of highway reconstruction, a large number of waste asphalt concrete will be produced. In the course of asphalt pavement reconstruction, the use of cold recycling technology can reduce the exploitation and use of new aggregates, avoid the occupation and pollution caused by waste landfill, reduce carbon emissions, and have remarkable economic and environmental benefits. In this paper, based on the overhauling project of Beijing-Taiwan high speed highway and the south section of Xu, according to the characteristics of highway asphalt pavement reconstruction and maintenance project, the application technology of emulsified asphalt cold regeneration technology in high speed overhaul project is studied in depth. This paper mainly includes the following four aspects: raw material selection and performance test; mixture design of emulsified asphalt cold recycled mixture; pavement performance study of emulsified asphalt cold recycled mixture (modulus of compressive resilience, low temperature crack resistance, High temperature stability, etc.; construction technology and quality control (grading, splitting strength, compaction, etc.) of cold regenerated base course. Based on a large number of indoor tests and actual construction data collection, the following results are obtained in this paper: (1) according to the comparison of three indexes of specimen density, Marshall stability and splitting strength, the secondary compaction method is recommended; (2) the critical strain energy density index is used to evaluate the low temperature crack resistance of emulsified asphalt cold recycled mixture, and the effect of cement content and new aggregate content on the low temperature crack resistance of emulsified asphalt cold recycled mixture is analyzed. The suitable amount of cement and new aggregate is obtained, (3) the modulus of compressive resilience of cold recycled asphalt mixture at 20 鈩，
本文编号：2223844
[Abstract]:In the process of highway reconstruction, a large number of waste asphalt concrete will be produced. In the course of asphalt pavement reconstruction, the use of cold recycling technology can reduce the exploitation and use of new aggregates, avoid the occupation and pollution caused by waste landfill, reduce carbon emissions, and have remarkable economic and environmental benefits. In this paper, based on the overhauling project of Beijing-Taiwan high speed highway and the south section of Xu, according to the characteristics of highway asphalt pavement reconstruction and maintenance project, the application technology of emulsified asphalt cold regeneration technology in high speed overhaul project is studied in depth. This paper mainly includes the following four aspects: raw material selection and performance test; mixture design of emulsified asphalt cold recycled mixture; pavement performance study of emulsified asphalt cold recycled mixture (modulus of compressive resilience, low temperature crack resistance, High temperature stability, etc.; construction technology and quality control (grading, splitting strength, compaction, etc.) of cold regenerated base course. Based on a large number of indoor tests and actual construction data collection, the following results are obtained in this paper: (1) according to the comparison of three indexes of specimen density, Marshall stability and splitting strength, the secondary compaction method is recommended; (2) the critical strain energy density index is used to evaluate the low temperature crack resistance of emulsified asphalt cold recycled mixture, and the effect of cement content and new aggregate content on the low temperature crack resistance of emulsified asphalt cold recycled mixture is analyzed. The suitable amount of cement and new aggregate is obtained, (3) the modulus of compressive resilience of cold recycled asphalt mixture at 20 鈩，
本文编号：2223844
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