Method for determining respective mixing amounts of SBS and SBR modifiers in modified asphalt

• Main Authors: ZHANG KAI, PENG SHUIGEN, LIU DONG, LUO ZHENGBIN, ZHANG HAN, AI ZHIYONG, YU XILAN, TAO JINGLIN
• Format: Patent
• Language: Chinese; English
• Published: 15.09.2020
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a method for determining respective mixing amounts of SBS and SBR modifiers in modified asphalt. The method comprises the following steps: S1, measuring a modifier content Cmodin a sample to be measured; S2, preparing a plurality of modified asphalt standard samples; S3, uniformly dispersing each modified asphalt standard sample into n-heptane at a normal temperature and normal pressure to obtain a turbid liquid, filtering by using a sand core filter and low-speed quantitative filter paper, and collecting all filtrates; S4, performing an infrared spectrum test on the filtrates to obtain an infrared spectrogram, and calculating a peak area ratio of characteristic peaks of each sample; S5, obtaining a standard curve and a standard equation by taking a proportion of the SBR as an independent variable and the peak area ratio of the characteristic peaks of the filtrates as a dependent variable; S6, preparing the modified asphalt sample to be detected into an n-heptane filtrate, measuring th