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Abstract

The low initial strength of cold mixed asphalt mixture leads to the delay of traffic opening time, and the large void ratio leads to poor water stability and other problems, which seriously hinder the development of cold mixed environment-friendly construction mode. In this paper, based on the principle that the heat of quicklime in the presence of water promotes the rapid loss of water in the cold mixed mixture, the mixing test and cohesion test of the MS-3 slurry cold mixed asphalt mixture with quicklime were carried out to explore the influence of quicklime on the demulsification time and cohesion. Then, the effect of quicklime on the initial strength and water stability of the cold mixed mixture was verified by testing the void ratio and uniaxial penetration strength of the AC-13 cold mixed asphalt mixture. The test results show that the process of demulsification of the cold mixed mixture is accelerated by the reaction of quicklime with water and the formation of alkaline calcium hydroxide, and the formation of early strength can greatly shorten the time of traffic opening. At the same time, the composite gelling structure has a significant effect on improving the overall strength and water stability of the pavement.

Publication Date

3-17-2023

DOI

10.14048/j.issn.1671-2579.2023.01.041

First Page

231

Last Page

234

Submission Date

March 2025

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