Comparative analysis of the influence of various materials on the state of the roadside environment during the road repair.

The relevance of the study is conditioned by the urgent need for the practical derivation of clear criteria for assessing the degree of influence of certain materials used in road construction on the state of the roadside environment directly during such works, including the overall environmental situation in the area. In this context, the main purpose of this study is to conduct an experimental investigation to determine the physical and mechanical properties and durability of some building materials used during road repair, to perform a comparative analysis of the results obtained to determine their optimal use in terms of influencing the state of the roadside environment during the repair of a highway section. The leading method in this study is a combination of a systematic analysis of the influence of various materials on the state of the roadside environment during the repair with experimental studies. The results obtained indicate the different influence of materials used in road repair works on the state of the roadside environment and the need to choose their optimal combination in the future when repairing the roadway. The results obtained and the practical conclusions formed on their basis will be of significant importance directly for the employees of the road repair services, who, by their occupation, solve the issues of using specific building materials when repairing and eliminating damage to the roadway, as well as for researchers who solve theoretical problems of choosing specific materials for carrying out repair works, from the standpoint of assessing their impact on the roadside environment.

Experimental Study on the Effect of Gradient Interface on the Mechanical Properties of Cu/WCP Functionally Gradient Materials Using Digital Image Correlation Technique.

In order to investigate the effect of gradient interface on the mechanical properties of Cu/WCP functional gradient materials, digital image correlation technique was used to analyze the mechanical characteristics of laminated Cu/WCP functional gradient material under tension load in the layer direction. In this paper, the deformation information of the specimens is obtained by the digital image correlation method. In order to obtain high-precision measurement results, speckle patterns with small spots and uniform distribution are prepared on the specimen surface by using small sample speckle preparation technology. The tensile experimental results showed that the incorporation of WC particles significantly improved the stiffness and strength of Cu/WCP composites. Meanwhile, the plastic strain and plastic strain rate are non-uniform in each layer of the five-layer Cu/WCP functional gradient material under the tension load along the layer direction. The plastic strain and plastic strain rate in each layer gradually increase along with the decreasing direction of WC content. It is found, from the analysis of experimental results, the existence of the gradient interface has an obvious inhibitory effect on the increase in plastic strain rate along the decreasing direction of WC content, and the specimen fracture location also has a certain relationship with the plastic strain rate, which reflects the important influence of the gradient interface on the mechanical properties of Cu/WCP functional gradient materials.