水性环氧新型冷补沥青混合料的性能对比分析
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摘要
为研发新型高性能的坑槽冷补材料,提出采用水性环氧组分对两种普通溶剂型冷补混合料进行改性,首先根据其技术特点提出新型冷补材料的性能评价方法与指标,然后以路用性能与施工性能系统研究水性环氧组分对冷补混合料的性能的影响与强化机理.结果表明:水性环氧组分对冷补材料的强度、水稳性、高温性能,以及黏结性都有显著改善,但对低温性能与存储性能有不利影响,综合考虑其掺量质量分数宜控制在1.2%～1.8%,水性环氧树脂与固化剂最佳质量比宜采用3∶1;另外,环氧组分对溶剂型冷补混合料的改性效果有重要影响,环氧组分EP-20+HGC在冷补材料中的固化适用期较长,对冷补料的成型强度、劈裂强度、高温性能改善效果较好,存储稳定性较好,可用于生产需要长时间储存的冷补沥青混合料;环氧组分EP-20+HGA改性的冷补混合料初始强度和水稳性能较好,强度成型速度快,但适用期较短,可用于坑槽的应急性修补.在实际养护工程中,应根据溶剂型冷补材料性能缺陷及养护需求选择适宜的水性环氧组分进行改善.
In order to develop a new type of high-performance pit and trough cold patching material, two common solvent-based cold patching mixtures were modified with aqueous epoxy component.. Firstly, the performance evaluation method and index of the new cold patching material were proposed based on its technical characteristics. Then,the effect of waterborne epoxy component on the cold patch asphalt mixture performance and strengthening mechanism were systematically studied based on pavement performance and construction performance system. The results shows that the water-based epoxy component significantly improves the strength, water stability, high-temperature performance and cohesiveness of the cold patching material, but adversely affects the low-temperature performance and storage performance Considering the mass fraction of water-based epoxy resin and curing agent, it should be controlled at 1.2 % ～ 1.8 %, and the best mass ratio of water-based epoxy resin and curing agent should be 3: 1. In addition, the epoxy component has an important influence on the modification effect of the solvent-based cold patching mixture. The epoxy component EP-20+HGC has a long curing application period in the cold patching material, and has good improvement effect on the forming strength, splitting strength and high-temperature performance of the cold patching material, and has good storage stability, and can be used for producing the cold patching asphalt mixture needing long-time storage. The cold patching mixture modified by epoxy component EP-20+HGA has good initial strength and water stability, fast strength forming speed, but short application period, and can be used for emergency patching of pits and troughs. In actual maintenance projects, appropriate waterborne epoxy components should be selected according to the performance defects of solvent-based cold patching materials and maintenance requirements for improvement.
In order to develop a new type of high-performance pit and trough cold patching material, two common solvent-based cold patching mixtures were modified with aqueous epoxy component.. Firstly, the performance evaluation method and index of the new cold patching material were proposed based on its technical characteristics. Then,the effect of waterborne epoxy component on the cold patch asphalt mixture performance and strengthening mechanism were systematically studied based on pavement performance and construction performance system. The results shows that the water-based epoxy component significantly improves the strength, water stability, high-temperature performance and cohesiveness of the cold patching material, but adversely affects the low-temperature performance and storage performance Considering the mass fraction of water-based epoxy resin and curing agent, it should be controlled at 1.2 % ～ 1.8 %, and the best mass ratio of water-based epoxy resin and curing agent should be 3: 1. In addition, the epoxy component has an important influence on the modification effect of the solvent-based cold patching mixture. The epoxy component EP-20+HGC has a long curing application period in the cold patching material, and has good improvement effect on the forming strength, splitting strength and high-temperature performance of the cold patching material, and has good storage stability, and can be used for producing the cold patching asphalt mixture needing long-time storage. The cold patching mixture modified by epoxy component EP-20+HGA has good initial strength and water stability, fast strength forming speed, but short application period, and can be used for emergency patching of pits and troughs. In actual maintenance projects, appropriate waterborne epoxy components should be selected according to the performance defects of solvent-based cold patching materials and maintenance requirements for improvement.
引文
[1] CHEN J S, HO H C, LIAO M C, et al. Engineering properties of asphalt concrete patching mixtures[J]. Journal of Testing & Evaluation, 2016,44(1):534-542.
[2] BISWAS S, HASHEMIAN L, HASANUZZAMAN M, et al. A study on pothole repair in Canada through questionnaire survey and l[J]. Revue Canadienne De Génie Civil , 2016,43(5):443-450.
[3] YANG P, ZHANG X N, LIU X W. Study on simplified test method about fatigue performance of cold patch asphalt mixtures[J]. Key Engineering Materials, 2010,417(1):493-496.
[4] 李延猛.高性能冷补沥青混合料材料组成与性能评价[D].西安:长安大学,2013.
[5] KENNETH D, YEUN JU K, TAMAS B, et al. Investigation of the properties of asphalt and its mixtures containing flame retardant modifier[J]. Construction & Building Materials, 2009,23(6):2277-2282.
[6] 张争奇,许铖,成高立,等.溶剂型冷补沥青液研制及其沥青混合料路用性能研究[J].铁道科学与工程学报,2016,13(9):1728-1736.
[7] 交通运输部公路科学研究院.公路沥青及沥青混合料试验规程:JTG E20—2011[S].北京:人民交通出版社,2011.
[8] 宋建生,吕伟民.储存式沥青混合料组成设计的研究[J].同济大学学报,1988,26(6):664-668.
[9] 盖卫鹏.冷补沥青混合料养护技术研究[D].西安:长安大学,2010.
[10] 张俊,楚好,逯艳华,等.乳化沥青冷补料成型、养生和试验方法研究[J].中外公路,2014,34(4):268-271.
[11] 延西利,何进财,金晓晴.冷补沥青混合料的技术性能及试验方法探讨[J].交通标准化,2006(9):72-77.
[12] 交通部公路科学研究所.公路沥青路面施工技术规范:JTG F40—2004[S].北京:人民交通出版社,2004.
[13] 王锋.水性环氧乳化沥青的制备及其混合料性能研究[D].重庆:重庆交通大学,2014.
[14] 李进,张良均,童身毅,等.水性环氧树脂的制备与性能研究[J].涂料工业,2008,38(1):44-46.
[2] BISWAS S, HASHEMIAN L, HASANUZZAMAN M, et al. A study on pothole repair in Canada through questionnaire survey and l[J]. Revue Canadienne De Génie Civil , 2016,43(5):443-450.
[3] YANG P, ZHANG X N, LIU X W. Study on simplified test method about fatigue performance of cold patch asphalt mixtures[J]. Key Engineering Materials, 2010,417(1):493-496.
[4] 李延猛.高性能冷补沥青混合料材料组成与性能评价[D].西安:长安大学,2013.
[5] KENNETH D, YEUN JU K, TAMAS B, et al. Investigation of the properties of asphalt and its mixtures containing flame retardant modifier[J]. Construction & Building Materials, 2009,23(6):2277-2282.
[6] 张争奇,许铖,成高立,等.溶剂型冷补沥青液研制及其沥青混合料路用性能研究[J].铁道科学与工程学报,2016,13(9):1728-1736.
[7] 交通运输部公路科学研究院.公路沥青及沥青混合料试验规程:JTG E20—2011[S].北京:人民交通出版社,2011.
[8] 宋建生,吕伟民.储存式沥青混合料组成设计的研究[J].同济大学学报,1988,26(6):664-668.
[9] 盖卫鹏.冷补沥青混合料养护技术研究[D].西安:长安大学,2010.
[10] 张俊,楚好,逯艳华,等.乳化沥青冷补料成型、养生和试验方法研究[J].中外公路,2014,34(4):268-271.
[11] 延西利,何进财,金晓晴.冷补沥青混合料的技术性能及试验方法探讨[J].交通标准化,2006(9):72-77.
[12] 交通部公路科学研究所.公路沥青路面施工技术规范:JTG F40—2004[S].北京:人民交通出版社,2004.
[13] 王锋.水性环氧乳化沥青的制备及其混合料性能研究[D].重庆:重庆交通大学,2014.
[14] 李进,张良均,童身毅,等.水性环氧树脂的制备与性能研究[J].涂料工业,2008,38(1):44-46.