Method for evaluating performance of cold recycled asphalt mixture of solvent asphalt

Abstract

The invention relates to a method for evaluating the performance of a cold recycled asphalt mixture of solvent asphalt. The method comprises the following steps: mixing an organic solvent with petroleum asphalt; separating an aggregate of a waste asphalt mixture; designing the mix proportion of the extracted aggregate; designing the mix proportion of the cold recycled mixture of solvent asphalt; according to the designed grading, molding and curing a test piece; and carrying out performance test on the molded and cured mixture test piece. According to the invention, solvent asphalt is taken asa binder to recycle old material RAP, and waste asphalt pavement material is mixed with specially prepared solvent asphalt at normal temperature. With the unique test piece forming and curing method,the method can improve the blending ratio of old material and the pavement performance of the cold recycled asphalt mixture, enriches the cold recycling technology of an asphalt mixture, provides reference for research and application of a solvent asphalt regenerated mixture in the future, and thus is an effective performance evaluation method for a cold recycled mixture of solvent asphalt.

Description

Technical field [0001] The invention belongs to the technical field of road paving surface materials and their processing and preparation, and relates to a method for evaluating the performance of a cold regenerated asphalt mixture of solvent asphalt. Background technique [0002] The design life of asphalt pavement is generally about 10 years, which means that about 10% of the asphalt pavement will enter the maintenance or reconstruction cycle every year, and the waste asphalt pavement materials generated from this will reach millions of tons every year. Urban roads and highways produce a lot of waste asphalt mixture (RAP) in the process of maintenance, repair and transformation. If they are not used effectively, it will not only cause a great waste of resources, but also cause pollution to the environment. If these waste asphalt pavement materials can be recycled and reused, at least hundreds of millions of yuan in material costs will be saved every year, and with the continuou...

AI Technical Summary

Problems solved by technology

The test method provided by the present invention can effectively determine the early stability of the emulsified asphalt cold recycled mixture, so as to judge whether it can be directly opened to traffic without closing the traffic for health preservation. However, the patent is not comprehensive enough to judge the stability of the emulsified asphalt cold recycled mixture only from the rutting aspect. not convincing

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