INFLUENCE OF THE LOAD ON THE MODULUS OF ELASTICITYOF THE ASPHALT GRANULATE LAYER DURING THE RESTORATIONSURFACE OF THE ROAD CONSTRUCTION PAVEMENT

Abstract

Statement of the problem. The effect of the size of fractions, layer thickness during compaction and the percentage of bitumen emulsion of asphalt granulate obtained during the destruction of an old non-rigid pavement by cold milling on the elastic modulus of the pavement is investigated. Results. It has been experimentally proven that taking into account the size of the fractions, the introduction of a bitumen emulsion into the mixture of asphalt granulate has a different effect on the strength characteristics of the asphalt granular concrete mixture. The greatest effect when the emulsion is introduced into asphalt granulate is achieved at 2 %. For a mixture of a fraction of5--20 mm, an increase in the bitumen emulsion from 2 to 4 % has no significant effect on the strength characteristics. For an asphalt-granular concrete mixture with fractions of 20--40 mm, with an increase in the emulsion content above 2 %, a decrease in the strength characteristics of the pavement layer occurs, which is explained by the structure of the compacted layer.Conclusion. Dependences for determining the modulus of elasticity of an asphalt granulate layer are presented taking into account its thickness, particle size and the percentage of bitumen emulsion in the mixture.