Quantification of emission potential from asphalt binders using mass loss and opacity measurements

Multimethod Approach to Investigate the Factors Influencing High-Temperature Fuming of Bitumen

“…At 200 °C under an inert atmosphere, oxidation reactions are negligible, and the more volatile constituents of the bitumen, those with a boiling point below or around 200 °C, should account for the majority of weight loss observed as these are evolved from the bitumen. The inert atmosphere is essential to the weight loss method to eliminate oxidation and avoid potential negative weight loss results seen in other mass loss methods . Through the use of these parameters, the method is optimized to volatilize all VOCs present in the bitumen.…”

“…When asphalt is prepared, bitumen is first heated to allow mixing with the aggregate. Depending on the type of bitumen used and the manufacturing process, the bitumen could reach temperatures above 200 °C, especially if overheating occurs. , During the mixing and laying of asphalt at high temperatures, fumes are emitted from the bitumen containing a range of organic compounds in the form of gases or particulate matter. , Through anecdotal reports and complaints, the material has been known to produce large quantities of fumes in isolated cases . Large clouds of visible fume can be unsettling to nearby communities and businesses and disruptive to workers handling bitumen.…”

“…There is a clear indication that the temperature strongly influences the rate and amount of organic material released from bitumen. An increase in temperature can drastically increase emissions and influence the PC values of analytes. ,, Besides this relationship between temperature and emissions, previous work has had difficulty in establishing clear indicators for predicting high-fuming bitumen. , …”

Predicting Mixing and Compaction Temperatures of Polymer Modified Bitumen

“…In the absence of a reliable method for the selection of mixing and compaction temperatures for polymer modified bitumen, many agencies have designed their own standards to estimates the appropriate temperatures of each modified bitumen. Obviously, there is a need for a formal method to determine the mixing and compaction temperatures of the modified bitumen and must consider its behavior [3][4][5][6][7][8][9][10][11][12][13][14][15]. In this study, two alternative methods named as High Shear Rate Method (HSR) and Steady Shear Flow (SSF) have been applied on using two penetration bitumen grades (50/70 and 160/220) samples involving elastomeric polymer called Styrene-Butadiene-Styrene (SBS) to determine mixing and compaction temperatures.…”

“…In most oxidation reactions, the hardening of the bitumen doubles as the temperature increases by 10 ºC. High temperatures also cause emission and odor problems [3][4][5][6][7][8][9][10]. In the absence of a reliable method for the selection of mixing and compaction temperatures for polymer modified bitumen, many agencies have designed their own standards to estimates the appropriate temperatures of each modified bitumen.…”