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Abstract

To improve the early serviceability of emulsified asphalt cold recycled mixtures, this paper studied the effect of curing conditions on the mechanical strength and stability of emulsified asphalt cold recycled mixtures by conducting indoor tests. The results show that in the same test conditions, the indoor emulsified asphalt cold recycled mixture can better characterize the serviceability of practical projects. Compared to the indoor specimen mixture, the stability and cleavage strength of field mixture core samples are increased by an average of 5.5% and 10.7% respectively. Under the curing time of no less than 7 d, the stability, cleavage strength and freeze-thaw cleavage strength ratio of cold recycled mixtures meet the technical requirements specified in Technical Specifications for Highway Asphalt Pavement Recycling (JTG F41-2008), with the increase rates of the above three indicators being 2.5%, 0.8%, and 0.6% respectively. Under the curing temperature of 40℃, the serviceability of cold recycled mixtures is optimal. As the water content increases, the void content of cold recycled mixtures first rises and then decreases, with gradually decreasing serviceability. Under the water content of 3.7% and 4.2%, the cleavage strength of the cold recycled mixture does not meet the technical requirements in Technical Specifications for Highway Asphalt Pavement Recycling (JTG F41-2008). It is recommended that the curing time of emulsified asphalt cold recycled mixtures should be 7 d and the curing temperature should be 25‒40℃.

Publication Date

9-14-2023

DOI

10.14048/j.issn.1671-2579.2023.04.040

First Page

250

Last Page

255

Submission Date

March 2025

Reference

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