Properties of new cold patch asphalt liquid and mixture modified with waterborne epoxy resin

ABSTRACT

In order to eliminate the deficiencies of the solvent-based cold patch asphalt mixture, this paper presented the cold patch asphalt mixture modified with waterborne epoxy resin (WER). Firstly, the new evaluation method were put forward based on its technical features and application requirements. Then the influence of different compositions and contents of WER on the cold patch asphalt liquid was evaluated by laboratory tests. Further, the pavement performance and workability of WER modified cold patch asphalt mixture were systematically evaluated. The results show that (i) WER can significantly improve strength, moisture susceptibility, high temperature performance and cohesion. However, the inappropriate addition may lead to poor storability and low temperature performance. So the optimal WER content is recommended 1.2–1.8 wt%, and its component ratio of epoxy resin to curing agent is 3:1. (ii) Different WER components produce different performances of mixture. The EP-20 + HGC brings about higher curing strength, excellent high temperature performance and storability. In comparison, the mixture modified with EP-20 + HGA owns preferable initial strength and moisture susceptibility. In the practical project, it is necessary to choose suitable WER considering the performance deficiency of cold patch materials and maintenance needs.

KEYWORDS:

• Solvent-based cold asphalt liquid
• curing reaction
• evaluation method
• pavement performance
• construction performance

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by Research Project by Department of Transport of Shaanxi Province [grant number 2014-01K] and the Key Laboratory of the Ministry of Education. The authors gratefully acknowledged their financial support.