Abstract
The article reviews the option of how to make the top pavement of asphalt-concrete mixture adhere reliably to the base, which is the underlying cement-concrete coating. The bitumen-latex emulsion is suggested as a binder for the two pavement layers. The research aimed to determine the optimal layer thickness of the bituminous-latex emulsion to be applied and achieve the maximum interlayer adhesion between the top asphalt-concrete pavement and the cement-concrete base. After full-scale experiments, the required layer thickness of the bitumen-latex emulsion was 2 mm. With this layer thickness of the binder, road pavement layers do not delaminate and shear when stressed by the intensive flows of vehicles moving on the roads. The results obtained are important for the road construction industry for suggesting the formulation of bitumen-latex emulsion and finding the most effective layer thickness to be applied. The suggested formulation of a bitumen-latex emulsion is frost-resistant. The article describes the experimental steps for determining the optimal application thickness at a fair length. The maintenance-free life of roads with an asphalt-concrete mixture on a cement-concrete base interlayered with a bitumen-latex emulsion as a binder is assumed to get much longer.
Highlights
The topic of highways has always been a problem for our state
The optimal layer thickness of bitumen-latex emulsion as a binding compound between the two top layers of the road surface was found by experiments; the samples of the two-layer top road pavement bound together with bitumen-latex emulsion were tested in situ
The tests found that the bitumen-latex emulsion layer on the cement concrete base provides the best shear resistance and the best interlayer binder when applied at the thickness of 2 mm
Summary
The topic of highways has always been a problem for our state. the correct selection of materials for road construction will ensure the durability and reliability of the road structure. In Russia, the adhesion of asphalt concrete layers is determined in accordance with paragraph 12.5.2 of the Joint Venture. The quality control of the adhesion of asphalt concrete coating layers is provided, while the control method, as well as numerical indicators, is not specified. It can be assumed that this is a visual inspection of the solidity of the core extracted by the core collector without determining the numerical value of the adhesion force. Using this method, it is possible to visually state the lack of traction, but in the presence of traction, it is impossible to assess its quality
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