Parameters Optimization of Conductive Rubber Snow-Melting Bridge Deck Pavement Based on Material-Structure Integrated Design Idea

To alleviate road snow and ice hazards, this study proposed a new method of electrically heated deicing based on conductive rubber composites. To reduce the influence of laying heating materials on the performance of pavement structure, the idea of material-structure integration design was proposed. From mechanical point of view, the effect of laying conductive rubber heating system on bridge deck pavement structure was studied by numerical simulation. The force mechanism of the paving structure and optimization suggestions were made for the parameters of the paving structure. The integrated design of conductive rubber composite material-paving structure was carried out from the perspective of heat and mechanics, and the optimal laying parameters of conductive rubber were determined. The maximum shear stress between the layers of the conductive rubber snow-melting bridge deck was 0.396 MPa, which was 77.6% higher than that of the ordinary bridge deck (0.223 MPa). The interlayer position had become a potential damage point of the snow-melting bridge deck pavement. When the elastic modulus of conductive rubber composites increases from 10 to 100 MPa, the interlaminar shear stress decreases by 73.9%, and the tensile stress at the bottom of the asphalt layer decreases by 2.41 times. To reduce the influence of laying conductive rubber composites on bridge deck pavement structure, the thickness of the asphalt lower layer can be increased or the elastic modulus of the asphalt lower layer can be reduced. The optimum laying thickness of conductive rubber composites was 5 mm ( the thickness of heat transfer layer is 1.5 mm, and the thickness of insulation layer was 3.5 mm). The research results can provide some references for the practical engineering deicing application of the conductive rubber heating system, and provide research ideas and methods for the use of other heating materials in the paving structure.