Abstract:
The purpose is to further develop the new application of energy-absorbing materials in the field of road. A new type of road energy-absorbing material with excellent mechanical properties, energy absorbing property and cushion property was prepared. The suitable curing time was determined. The mechanical properties, energy absorption characteristics and cushion effect of different types of road energy-absorbing materials were clarified. On this basis, the comprehensive property evaluation system of road energy-absorbing materials based on multi index decision-making was established. Type II elastomeric polymer (EP-Ⅱ) was used as the basic energy-absorbing material. The optimum scheme of composition ratio of road energy-absorbing materials was recommended. It lays a solid foundation for the further popularization and application of energy-absorbing materials in road engineering. The results show that both polyvinyl alcohol (PVA) fiber and ultra high molecular weight polyethylene (UHMWPE) micropowder can effectively improve the mechanical properties and energy absorption properties of Type Ⅱ elastomeric polymer, but the effect of the latter is more significant; Both of them can enhance the performance of basic energy absorbing materials. The tensile properties, tearing properties and energy absorption properties are improved by 127.4%-129.11%, 34.04% and 101.65% respectively; Considering the working properties and economic benefits, the optimum scheme of the recommended road energy-absorbing material is 1.0wt% PVA-3wt% UHMWPE/EP-Ⅱ. The corresponding working property indicators are: tensile strength 14.29 MPa, elongation at break 703.36%, tear strength 79.27 N/mm, absorbed conversion energy 1.73 J, and the minimum buffer factor 10.21.