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Development and Performance Evaluation of Cold-Patching Materials Using Waterborne Epoxy-Emulsified Asphalt Mixtures
Materials (Basel, Switzerland)
|March 19, 2020
Summary
This study developed a novel cold-patching asphalt mixture using waterborne epoxy resin for improved road repair. The enhanced material, waterborne epoxy emulsified asphalt mixture (WEEAM), significantly boosts pavement performance and road service levels.
Area of Science:
- Materials Science
- Civil Engineering
- Polymer Chemistry
Background:
- Road maintenance commonly uses patching for potholes.
- Existing cold-patching asphalt mixtures require performance enhancement.
Purpose of the Study:
- To develop and evaluate an emulsified asphalt modified with waterborne epoxy resin for cold-patching applications.
- To improve the performance and service levels of road repair materials.
Main Methods:
- Selected two waterborne epoxy resins and two curing agents.
- Determined optimal curing agent content via compressive strength tests on waterborne epoxy mortar (WEM).
- Evaluated WEM differences using flexural strength and stress-strain curves from modified bending tests.
- Proposed an evaluation method for initial and forming strength of waterborne epoxy emulsified asphalt mixture (WEEAM) using compaction molding and curing conditions.
- Verified high and low-temperature performance and moisture susceptibility of various WEEAMs.
Main Results:
- Optimal curing agent contents were identified for WEM.
- Distinct performance differences between the two waterborne epoxy resins were characterized.
- A robust evaluation method for WEEAM strength was established.
- WEEAM demonstrated superior high-temperature performance, low-temperature performance, and moisture resistance compared to conventional mixtures.
Conclusions:
- The developed waterborne epoxy emulsified asphalt mixture (WEEAM) offers significant advantages for road repair.
- WEEAM enhances pavement performance and extends road service life.
- This modified asphalt mixture represents a promising advancement in road maintenance technology.
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