Optimization of compounding ratio of fume-suppressing asphalt and evaluation of its effect of fume suppression
In order to suppress the generation of asphalt fumes at high temperatures and reduce the level of environmental pollution and the health impact of operators,the optimization study of the compounding ratio of fume-suppressing asphalt was carried out.Based on the needle penetration,ductility and softening point of single-doped fume-suppressing asphalt and the fume production test results of the asphalt under the self-research device,the optimization of the ratio of fume-suppressing asphalt was carried out by combining entropy weight method and genetic algorithm,and analysis of the dispersion uniformity and storage stability of the optimized fume suppressant in asphalt and its effect on the characteristic functional groups of asphalt.The high,medium and low temperature performance tests of fume-suppressing asphalt based on the optimized compounding ratio were carried out,and the effect of fume suppression was evaluated to verify the effectiveness of the optimized compounding ratio method.The main conclusions were as follows.The fume suppressant was uniformly dispersed in the asphalt and did not change the characteristic functional groups of asphalt.The optimized compounded fume-suppressing asphalt met the storage stability requirements.The optimized compounding of fume suppressant improved high and low temperature performance of asphalt and enhanced the medium temperature fatigue performance of asphalt.The color change of the filter tube before and after the asphalt fume collection indicated that the asphalt fume enrichment method was highly reliable.The optimized compounding fume-suppressing asphalt had a significant effect of fume suppression and the maximum fume suppression rate was 99.7％.The small difference between the predicted and measured values of the indicators proved the reliability of the optimized compounding ratio method.
fume-suppressing asphaltentropy weight methodgenetic algorithmeffect of fume suppression
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