In order to study the fume suppressive effect of SBS and nano calcium carbonate, this paper studied the fume suppression laws of SBS and nano calcium carbonate, and carried out ratio test of SBS and nano calcium carbonate, and got the conclusions that: With the increasing adding level of SBS and nano calcium carbonate, the asphalt fume productive rate will reduce gradually and will reach a condition of stability. The adding level of 4% of SBS is a turning point. When less than 4%, the asphalt fume production rate decreased rapidly; and more than 4%, the asphalt fume production rate decreased slowly; when adding nano calcium carbonate at the level of 5%, the asphalt fume won’t decrease. The best ratio of SBS and nano calcium carbonate is 6% of SBS and 6% of nano calcium carbonate, with which asphalt fume reductive rate was up to 30%.
In order to reduce the road asphalt fumes in the process of construction, the paper proposed to add some substances in asphalt to reduce the yield of asphalt fumes. Firstly, considering the theory of how the asphalt fumes come into being in the process of construction on the pavement, six possible additives to restrain these fumes havd been screened out. And tests of fumes suppression effect had been done to get the results that: SBS has a good effect of fumes suppression. When added by 3%, the asphalt fumes reduced by the rate of 19.2%; PE has an suppressive effect on asphalt fumes. When added by 3%, the asphalt fumes reduced by the rate of 6.5%; Melamine has a good effect of fumes suppression. When added by 3%, the asphalt fumes reduced by the rate of 45.1%; Ammonium molybdophosphate has an abnormal effect of fumes suppression. When added by 1%, the asphalt fumes not only did not reduce but increases. When added by 3%, the asphalt fumes reduced by the rate of 23.3%; nanoCalcium carbonate has an effect of fumes suppression. When added by 3%, the asphalt fumes reduced by the rate of 4.8%; Activated Carbon has a good effect of fumes suppression. When added by 3%, the asphalt fumes reduced by the rate of 41.6%.
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