表面活性剂型沥青温拌剂Alube的技术性能研究

Study on Technical Properties of Surfactant-Based Asphalt Warm Mix Additive Alube

摘要: 为了研究新型表面活性剂型沥青温拌剂Alube对沥青技术性能的影响，并与常用的同类温拌剂Evotherm进行对比，分别将其掺入70#沥青中配制不同掺量的温拌沥青。通过试验测试了温拌沥青的接触角、三大指标、布氏黏度和复数模量等，并通过变速拌和试验研究了温拌沥青混合料拌和流动特性，分析了其温拌效果。结果表明：Alube与Evotherm均基本不改变沥青的三大指标和布氏黏度，而是直接降低混合料的拌和黏度；两种温拌剂均提高了沥青的复数模量G*，改善了沥青的高温抗变形能力。变速拌和试验结果表明Alube和Evotherm温拌效果良好，70#沥青在0.7%的Alube和Evotherm剂量下可分别降低拌和温度约21℃和14℃。

Abstract: In order to study the influence of the new surfactant-based asphalt warm mix additive Alube on technical properties of asphalt, and compare it with the similar warm mix additive Evotherm which is commonly used, they were mixed into 70# asphalt to prepare different dosages of warm mix asphalt. Then the contact angle, three indexes and Brinell viscosity of warm mix asphalt were tested. The mixing flow characteristics of warm mix asphalt mixture were studied by variable speed mixing test, and the mixing effect and road performances of warm mix asphalt mixture were analyzed. The results showed that Alube and Evotherm did not change the three indexes of asphalt and Brinell viscosity, but directly reduced the mixing viscosity of the asphalt mixture. The results of variable speed mixing test showed that the warm mix effect of Alube and Evotherm was good. The mixing temperature of 70# asphalt could be reduced by about 21˚C and 14˚C respectively at 0.7% Alube and Evotherm dosage. In addition, the road performance of the mixture was improved by both warm mix additives.