Asphalt Fume Generation-Enrichment Device Development and Fume Production Estimation Model

Abstract

Abstract Although indoor asphalt fume production tests are widely used because of their convenient operation, good controllability, and high reliability, because of differences in asphalt morphology during heating, the experimental data from an indoor test cannot accurately reflect outdoor conditions. This article proposes an asphalt fume generation-enrichment system that can correlate indoor and outdoor fume production results. At the same time, we develop a reliable detection process, which is used to analyze the correlation between asphalt fume production and its heating temperature, heating time, and exposure area. We then summarize the applicable rules for asphalt-mixture fume production research. The present study shows that the conversion link between indoor asphalt fume production and asphalt mixture fume production is the rate of fume production, which is affected by the heating temperature, heating time, and exposed area of the asphalt. Because of differences in the threshold of the asphalt’s volatile organic compounds and the chemical reaction’s starting temperature, the asphalt fume production rate has a multiple function relationship with temperature, and because of the difference in the size of the fume generation channel, it has a linear function relationship with the asphalt’s exposed area. Thus, this study proposes prediction models for the fume production of two asphalts under different heating environments and provides a reference for calculating fume production of the asphalt and asphalt mixtures.