Waterproof asphalt is prepared by mixing fluid catalytic cracking (FCC) slurry with 70# road asphalt

and 9

10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) is used to chemically suppress fumes in FCC slurry mixed waterproof asphalt. The effects of FCC slurry dosage and DOPO modification on the physical and aging properties of FCC slurry mixed waterproof asphalt and the concentrations of volatile organic compounds (VOCs) and H2S in asphalt fumes were studied. The results show that the waterproof asphalt meeting the F150 performance index can be prepared by adding 15%-20% (mass fraction) FCC slurry to 70# road asphalt

but its anti-aging performance is poor

and the FCC slurry significantly increases the concentration of VOCs in asphalt volatiles. The use of DOPO can effectively reduce the emissions of VOCs and H2S from F150 waterproof asphalt. When the DOPO content is 1% (mass fraction)

the VOCs and H2S generated by heating F150 waterproof asphalt at 180 ℃ for 1 hour are reduced by 61.29% and 77.04%

respectively; Gas chromatography-mass spectrometry analysis show that the types of organic compounds in the fumes of waterproof asphalt mixed with 1% DOPO are significantly reduced

and the concentrations of fatty hydrocarbons

aromatic compounds

ketone aldehyde hydrocarbon derivatives and sulfides in the smoke are reduced by 69.8%

51.9%

50.7% and 55.9% respectively. Physical and aging performance tests show that DOPO has little effect on the physical properties of FCC slurry mix waterproof asphalt

but significantly improve its anti-aging performance.