"Low-temperature plasma activated chloroprene rubber and ethylene-vinyl acetate copolymer and their compound modified asphalt performance "

Abstract

"In order to improve the performance of crumb rubber modified asphalt, chloroprene rubber (CR) with a mass ratio of 11/100 to matrix asphalt and ethylene-vinyl acetate copolymer (EVA) with a mass ratio of 3/100 were used as modifiers to prepare modified asphalt. CR/EVA was activated by low-temperature plasma to further improve the performance of compound modified asphalt. The road performance of single modified, compound modified and low-temperature plasma activated compound modified asphalt (A-CR/EVA-MA) were studied. The microscopic mechanism of each modified asphalt was analyzed by scanning electron microscopy, atomic force microscopy and Fourier transform infrared spectroscopy. The results showed that the road performance of each modified asphalt was improved, and the overall performance of the activation modification system was better than those of compound modification and the single modification system. The penetration, softening point, ductility, Brookfield viscosity and anti-rutting factor of A-CR/EVA-MA increased by 46%, 47%, 94%, 253%, and 278% respectively compared to the matrix asphalt, and the storage stability was also further improved. The low-temperature plasma activation technology increased the specific surface area and surface functional group content of the modifier, improved the adsorption capacity of the modifier to the light components in the asphalt, promoted the close combination of CR, EVA and asphalt, and improved effectively the road performance of the modified asphalt. "

Keywords

• modified asphalt， low-temperature plasma，chloroprene rubber，ethylene-vinyl acetate copolymer， road performance， microscopic mechanism，