摘要
为抑制沥青在高温下烟气的产生,降低环境污染及对作业人员健康的影响程度,本文进行了抑烟沥青复掺配比优化研究.基于单掺抑烟沥青的针入度、延度及软化点及自制沥青烟生成富集装置的沥青产烟结果,结合熵权法与遗传算法进行抑烟沥青复掺配比优化,并分析优化复掺抑烟剂在沥青中的分散均匀性、储存稳定性及其对沥青特征官能团的影响;基于优化复掺配比的抑烟沥青高、中、低温性能测试,并对其抑烟效果进行评价,验证优化复掺配比方法的有效性.研究表明:抑烟剂均匀分散于沥青中,且未对沥青特征官能团产生改变,优化复掺抑烟沥青满足储存稳定性要求.优化复掺抑烟剂对沥青高、低温性能具有改善作用,并提升了沥青中温抗疲劳性能.沥青烟收集前后滤管颜色变化表明该沥青烟富集方式具有较高的可靠性,且优化复掺抑烟沥青具有显著抑烟效果,最大抑烟率为99.7％.优化复掺配比下的指标预测值与实测值差异较小,证明了该优化复掺配比方法的可靠性.
Abstract
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.
国家科技期刊平台
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