Development And Performance Study Of Biomass Asphalt Regenerating Agent

Due to the continuous consumption of petroleum resources and the development and progress of biotechnology,road researchers have begun to gradually study the related aspects of bio-asphalt.Bio-oils are generally classified into:modifiers,diluents,and asphalt substitutes,depending on the proportion of bio-oil in the asphalt.At present,only a few studies have used bio-oil binders as modifiers or blenders for asphalt,and research using bio-adhesives as asphalt regenerants is still very limited.Based on this research,based on the research of biomass heavy oil,relying on the scientific and technological research project of Shandong Qilu Traffic Development Group Co.,Ltd.,"Research on the Application of Resource-saving Asphalt Pavement Plant Mixing and Recycling Technology",the material asphalt regenerant products are produced and related performance research is carried out.In the development of regenerants,through the screening of biomass basestocks,biomass regenerant base oils with excellent performance are preferred,and then regenerant-related supplemental components are preferred according to the performance requirements of regenerant applications,for a total of six components,ie Biological base oils,softeners,plasticizers,surfactants,antioxidants,anti-stripping agents.Using the uniform test design method,using the binder test index as the response value,the material composition design of the six regenerant components,using DPS data processing software and LINGO programming software to optimize the solution to obtain the regenerant material composition formula,homemade SW-1 The proportion of the six components of the regenerant was 70.11%,16.14%,5.25%,4.18%,2.14%,and 2.18%,respectively.Based on the self-made SW-1 biomass regenerant,the other three regenerant products(ZS-1,ZS-2,ZS-3)were selected for lateral comparative analysis,through viscosity,flash point,film oven mass loss and viscosity.Compared with the macroscopic test methods,the physical properties of the self-made regenerant were evaluated.The macroscopic tests showed that all the four regenerants met the relevant specifications,and the comprehensive performance of the SW-1 biomass asphalt regenerant was better than the other three regenerants.In addition,Fourier transform infrared spectroscopy(FTIR)and differential scanning calorimetry(DSC)were used to analyze the chemical structure,anti-aging properties,thermal stability properties and permeability properties of the selfmade regenerant.The other three regenerants were selected for lateral comparison studies.The thermal stability energy ranking based on DSC test analysis is:SW-1=ZS-3>ZS1>ZS-2,and the anti-aging performance of regenerators by infrared spectrum analysis is:ZS-3>SW-1>ZS-1>ZS-2,macroscopic permeation and diffusion performance analysis of regenerants.The order of permeation and diffusion properties of regenerants is:SW1>ZS-3>ZS-1>ZS-2.Add 6% regenerant(SW-1,ZS-1,ZS-2,ZS-3)to mildly aged and heavily aged asphalt,respectively,through conventional physical property index test,rheological property test,infrared spectrum analysis,Thermogravimetric-differential scanning calorimetry(TGDSC)analysis and other test methods are used to comprehensively analyze and evaluate the recycled asphalt binder.The conventional properties and rheological properties of the binder show that the four regenerants have a recovery effect on the aged asphalt,but the performance of the SW-1 regenerant is relatively best.Only TG-DSC test analysis showed that ZS-1 regenerant improved the thermal stability of aged asphalt,followed by SW-1 regenerant.