水泥路面应用水性环氧改性乳化沥青砂雾封层技术研究

发布时间：2018-02-15 03:43

本文关键词： 水性环氧树脂乳液改性乳化沥青雾封层储存稳定性耐磨性能抗滑性能　出处：《长安大学》2015年硕士论文　论文类型：学位论文

【摘要】：水泥混凝土路面表面构造在1-2年即被磨掉,严重影响行车安全性。水性环氧树脂改性乳化沥青砂雾封层是由雾封层技术改造升级而来的一种新型预防性养护技术,以改性乳化沥青或煤沥青基材料、陶土、聚合物添加剂为主要成分的雾封层材料与砂组成的混合料,铺筑在路表,可以保持或改善路面抗滑性。但普通的改性乳化沥青粘结力和耐久性较差,使用寿命较短。水性环氧树脂是将环氧树脂以微粒或液滴形式分散在水为连续相的分散介质中形成的乳液,具有亲水性、VOC含量低、污染小、稳定好、固含量高、粘稠度低和粘结性能强等特点。将水性环氧树脂加入改性乳化沥青,制成复合乳液,能显著提高其粘结力。本文对水性环氧树脂改性乳化沥青及其砂雾封层性能进行了研究,主要研究工作概况如下:对改性乳化沥青和水性环氧树脂的主要技术指标进行了测试,阐述了水性环氧树脂加入改性乳化沥青后的固化机理,研究了水性环氧树脂掺量对改性乳化沥青性质的影响,发现加入水性环氧树脂的改性乳化沥青的高温性能、低温性能和乳液黏度显著增加。采用正交试验,研究了水性环氧树脂掺量、洒布砂的粒径、砂的洒布量对水性环氧树脂改性乳化沥青砂雾封层磨耗性能和抗滑性能的影响规律,确定影响雾封层磨耗性能的主要因素是水性环氧树脂掺量,影响雾封层抗滑性能的主要因素是洒布砂的粒径。基于荷载磨耗试验,比较了固化剂掺量、温度和水性环氧树脂掺量对雾封层固化时间的影响趋势,得出水性环氧树脂固化剂掺量和养护温度是影响雾封层固化时间的主要因素;通过磨耗试验、抗滑试验、水稀释试验和粗集料粘附试验,对比分析了水性环氧树脂改性乳化沥青雾封层与传统改性乳化沥青雾封层的性能,结果表明水性环氧树脂雾封层在磨耗性能和抗滑性能方面远胜传统雾封层,且其雾封层材料具有水稀释性能和更好的与粗集料的粘附性;最后,进行了不同养护措施经济效益分析,指出水性环氧树脂改性乳化沥青砂雾封层比传统雾封层的年寿命周期成本要低,具有良好的经济效益。
[Abstract]:The surface structure of cement concrete pavement was worn off in 1-2 years, which seriously affected the driving safety. The waterborne epoxy resin modified emulsified asphalt sand fog seal is a new type of preventive maintenance technology. The mixture composed of modified emulsified asphalt or coal bitumen base material, clay, polymer additive as the main composition of fog sealing material and sand, is laid on the road surface, It can maintain or improve the skid resistance of road surface. But ordinary modified emulsified asphalt has poor adhesion and durability. Waterborne epoxy resin is a kind of emulsion formed by dispersing epoxy resin in aqueous continuous medium in the form of particles or droplets. It has low content of hydrophilic VOC, small pollution, good stability and high solid content. The adhesion of waterborne epoxy resin modified emulsified asphalt and its sand fog sealing layer was studied in this paper, and the adhesive strength of the modified emulsified asphalt was greatly improved by adding waterborne epoxy resin into modified emulsified asphalt. The main research work is as follows: the main technical indexes of modified emulsified asphalt and waterborne epoxy resin are tested, and the curing mechanism of waterborne epoxy resin with modified emulsified asphalt is expounded. The influence of the content of waterborne epoxy resin on the properties of modified emulsified asphalt was studied. It was found that the high temperature performance, low temperature property and emulsion viscosity of modified emulsified asphalt with waterborne epoxy resin were increased significantly. The effects of the amount of waterborne epoxy resin, the particle size of sprinkled sand and the amount of sand on the wear and slip resistance of emulsified asphalt sand modified by waterborne epoxy resin were studied. The content of waterborne epoxy resin and the particle size of sprayed sand are determined as the main factors that influence the wear performance of fog sealing layer. Based on the load wear test, the content of curing agent is compared. The effect of temperature and content of waterborne epoxy resin on curing time of fog seal layer is studied. The results show that the content of curing agent and curing temperature of waterborne epoxy resin are the main factors affecting curing time of fog seal layer. Water dilution test and coarse aggregate adhesion test were used to compare and analyze the properties of waterborne epoxy resin modified emulsified asphalt fog seal layer and traditional modified emulsified asphalt fog seal layer. The results show that waterborne epoxy resin foggy seal is much better than traditional fog seal in wear performance and skid resistance, and its foggy sealing material has water dilution property and better adhesion to coarse aggregate. The economic benefits of different curing measures were analyzed. It was pointed out that the annual life cycle cost of emulsified asphalt sand sealed by waterborne epoxy resin was lower than that of traditional fog seal, and it had good economic benefit.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.2

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