Research On Cold Patch Asphalt Mixture

In the process of long-term use, asphalt pavement prone to cause loose, holes, spalling and other diseases. In order to prevent more extensive and deeper level damage, the pavement must be patched timely. The traditional hot repair method consume much energy, causes gross pollution, restricted by the characteristics of the project and the construction environmental, can not accomplish timely and effective repair construction. Cold patch asphalt mixture do not need heating, in spite of the weather and construction constraints, can be use to realize all-weather use, greatly enhanced the road maintaining efficiency and traffic safety. However, Cold patch asphalt mixture in the market perform differently because of the shortage of systemic evaluation guideline and test methods. Therefore, study the performance of cold patch asphalt mixture, develop its systemic performance evaluation methods, has a very important practical significance.Aim at this problem, the major research work we carried was as follows: firstly, through mix proportion design, developed a kind of cold patch asphalt mixture with good performance. Secondly, reference relevant data of performance evaluation of cold patch asphalt mixture at home and abroad, and through screen and modify the performance evaluation methods and design new methods, develop the test program of the research. again, take the developed cold patch asphalt mixture and representative products of cold patch asphalt mixture from the market as the trial research materials, use the developed test programs, research the influence of the performance from the addition of the lime, study the relationship between performance of cold patch asphalt mixture and the grade of base asphalt, study the comparison of the self-developed cold patch asphalt mixture and the overseas cold patch asphalt mixture and development of the rutting test method. The results are as follows: Amended cold patch asphalt mixtures Marshall test method in the specification reasonably, Proposed a new Marshall testing method at room temperature, Revealed the long-term and short-term strength Growth rules of the cold patch asphalt mixture, Proposed initial program of the rutting test methods. Finally, applied cold patch asphalt mixture to the field and observed the results, accumulated some practical engineering experiences.