Preparation and Performance Characterization of Waterborne Epoxy Resin Modified Emulsified Asphalt
To address issues such as poor stripping resistance,low adhesion,and low strength in emulsified asphalt,waterborne epoxy resin(WER)was utilized to prepare waterborne epoxy modified emulsified asphalt(WEREA),leveraging the excellent properties of WER.The optimal amount of curing agent was determined based on tensile strength and elongation at break,resulting in the preparation of high-performance WER.Emulsified asphalt was then modified using various doses of WER.The performance of WEREA was characterized through laboratory experiments liketensile tests,boiling tests,tests for the three major indicators of evaporation residue,pull-out tests,and interlayer shear tests to determine the optimal dosage.The results indicated that a curing agent dosage of approximately 45%of the total epoxy resin yielded good tensile strength and elongation at break.The optimal performance of the modified asphalt was achieved with a WER dosage of 15%of the emulsified asphalt.Penetration and ductility decreased with increasing WER content,while the softening point increased.The adhesion level was rated at 5 for WER content above 15%.The modification effect of WER was superior to high-viscosity SBS under both room and high-temperature conditions,and it stabilizes at a 15%WER dosage.Additionally,interlayer shear strength increased gradually as WER content was rising,and the shear strength at room temperatures was significantly higher than that at high temperatures.
waterborne epoxy resinmodified emulsified asphalttensile testshear strengthpull-out test
NETL
NSTL
万方数据
