微波敏感型沥青再生剂软化效果影响因素分析

Analysis on Influencing Factors of Softening Effect of Microwave Sensitive Asphalt Rejuvenate Agent

微波敏感型沥青再生剂是一种用于沥青路面就地热再生的乳液型再生剂,具有极强的微波敏感性,可以在微波作用下实现沥青路面的快速软化和再生。为了使微波敏感型沥青再生剂在就地热再生中发挥最佳性能,通过微波敏感型沥青再生剂的理化特性试验和自行设计的混合料软化试验,对影响微波敏感型沥青再生剂软化效果的影响因素:微波作用方式(不同时间、不同功率)、再生剂用量、混合料空隙率、集料类型进行了研究,分析了各影响因素对混合料软化效果的影响规律。通过路试,验证了微波敏感型沥青再生剂的软化效果。研究结果表明,微波敏感型沥青再生剂软化效果受微波作用时间和作用功率的双重影响,微波作用时间越长软化效果越好,而作用功率存在最佳值;随着微波敏感型沥青再生剂用量的增加,混合料的软化效果增强,但当用量大于某值时,软化效果增加不明显;混合料的空隙率越大,软化效果越好;混合料的软化效果受集料类型影响,但与集料的微波敏感程度相关性不大。

Microwave sensitive asphalt rejuvenate agent is an emulsion rejuvenate agent used for hot in-place recycling of asphalt pavement. It has strong microwave sensitivity and can realize rapidly softening and recycling asphalt pavement under the action of microwave. In order to optimize the performance of microwave sensitive asphalt rejuvenate agent in hot in-place recycling, the factors influencing softening effect of microwave sensitive asphalt rejuvenate agent,including microwave action mode（ different time,different powers）,amount of rejuvenate agent,void ratio of mixture and type of aggregate are studied by physical and chemical properties test and self-designed mixture softening test,and the influence rule of each factor on softening effect of mixture is analyzed. The softening effect of microwave sensitive asphalt rejuvenate agent is verified by road test. The study result shows that（ 1） the softening effect of microwave sensitive asphalt rejuvenate agent is affected by both action time and power of the microwave,the longer the action time,the better the softening effect,and the optimal value of the action power exists;（ 2） with the increase ofmicrowave sensitive asphalt rejuvenate agent amount,the softening effect of mixture is enhanced,but the softening effect does not increase obviously when the amount of microwave sensitive asphalt rejuvenate agent is more than a certain value;（ 3） the softening effect is improved with the voids of asphalt mixture;（ 4） the softening effect of the asphalt mixture is affected by the category of aggregate,but not interrelate to the microwave sensitivity of aggregate.