Shell Bitumen - WAM Field Test Results Italy - Inspiring Solutions for ...

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Figure 3 SO 2 and dust emission levels at three measurement times in the asphalt plant 0.1 0.09 M1 M2 M3 0.08 Emission level (kg/h) 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 HMA WAM foam HMA WAM foam SO2, kg/h Dust, kg/h Figure 3 shows that SO 2 and dust emissions levels are low, but still reductions in the order of 25 to 30% can be obtained. 7/11
3.3 Results and discussion on emissions in the asphalt plant A first emission study was carried out in an asphalt mixing plant in 2000 [2]. This recent study is a more extensive study in an asphalt mixing plant. The results (in mg/m 3 ) are presented in Figure 4, in which MF indicates the mineral fraction, BSF the benzene soluble fraction and VF the volatile fraction. Figure 4 Emissions in the asphalt plant Pugmill sampler 1 Pugmill sampler 2 Hopper 70 Emissions (mg/m3) 60 50 40 30 20 10 0 HMA WAM HMA WAM HMA WAM MF BSF VF It appears that the pugmill discharge is the location where most fumes are emitted. The mineral fraction (MF) was found similar. The organic fraction (BSF) was found significantly higher for HMA (up to 200 times more). Organic aerosols represent a little part of the total emissions for WAM unlike HMA (up to 4% and 90% respectively). The volatile fraction (VF) was found higher for HMA (up to 6 times more). Due to the very low level of emitted BSF with WAM, the volatile fractions can represent almost all the organic emissions (up to 99%). 8/11
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Page 3 and 4: For both emissions and exposures, f
Page 5 and 6: Picture 2 Picture 3 Two static samp
Page 7: Figure 1 CO 2 emission levels at th
Page 11 and 12: 5. PAHs in BSF The PAH concentratio

Shell Bitumen - WAM Field Test Results Italy - Inspiring Solutions for ...

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