摘要
为量化温拌剂的减排效果,对热拌与温拌沥青路面的生产和施工展开实地调研。选取排放问题较典型的拌和站出料、露天一般路面摊铺、隧道路面摊铺3个测试环境进行空气采样,选取采集空气样本中的CO、CO2、H2S、SO2、NOx、PM2.5、PM10、苯并(a)芘(BaP,挥发性有机物,一级致癌物质)、沥青烟(致癌物)9种物质作为特征排放物进行定量分析,并将分析结果与有害浓度限制值以及相关研究结果进行了对比。研究结果表明:相较热拌工艺,选用的温拌剂可有效降低混合料的拌和与压实温度,降低了20℃,与此同时,在上述3个测试环境中,掺入温拌剂使9种排放物的浓度平均降低了28.6%、20.8%和26.4%,并可将热拌工艺下拌和站出料测试环境中超标的CO和隧道路面摊铺环境中超标的沥青烟浓度控制至限制值以内;温拌剂对致癌物BaP(降低40%以上)和沥青烟(降低30%以上)的减排效果最好,气态排放物CO、CO2、SO2、NOx次之,但H2S、PM2.5、PM10没有观察到具有统计意义的减排效果;与同类研究结果的对比表明,CO、CO2的减排效果与温度降幅的相关性最高,SO2的排放量除了与温度有关还与集料的酸碱性有关,NOx的减排效果主要来自用于加热的燃料节约,加热温度的降低也使BaP的挥发变弱。温拌剂可以有效降低沥青混合料施工生产中的排放。
To quantify the emission reduction effect of warm mix additives,field research was carried out on the production and construction of hot mix and warm mix asphalt pavement and three typical test environments,namely,"mixing station discharge""open-air general road paving"and"tunnel paving",were selected for air sampling.Nine substances(CO,CO2,H2S,SO2,NOx,PM2.5,PM10,Benzoapyrene(BaP,volatile organic compounds,a primary carcinogen),and asphalt smoke(also carcinogen))were selected as characteristic emissions for quantitative analysis.The results were compared with the harmful concentration limit values and the test results of similar studies.The results show that the warm mix additive is selected by the project can effectively reduce the mixing and compaction temperature of a mixture by 20℃,at the same time as the above three test environments,the warm mix additive reduces the concentration of the nine emissions by averages of 28.6%,20.8%,and 26.4%,respectively,making the excessive CO concentration in the"mixing station discharge"environment and the excessive asphalt smoke concentration in the"tunnel paving"environment satisfy the limit value.The warm mix additive has the best emission reduction effect on the carcinogen BaP(reduced by more than 40%)and asphalt smoke(reduced by more than 30%),followed by gaseous emissions CO,CO2,SO2,and NOx,However,for H2S,PM2.5,and PM10,no significant emission reduction effects are observed.A comparison with similar studies shows that the carbon dioxide emission reduction effect has the highest correlation with the temperature drop,and the emission of SO2 is related to the acidity and alkalinity of the aggregate in addition to temperature.The emission reduction effect of NOx comes from the saving of heating fuel and the reduction of heating temperature of asphalt also leads to the weakening of the volatilization of BaP.Furthermore,the warm mix additive can effectively reduce the discharge of the asphalt mixture in construction and production.9 tabs,3 figs,31 refs.
作者
邱延峻
罗浩原
张家康
冷慧康
艾长发
QIU Yan-jun;LUO Hao-yuan;ZHANG Jia-kang;LENG Hui-kang;AI Chang-fa(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan,China;Key Laboratory of Highway Engineering of Sichuan Province,Southwest Jiaotong University,Chengdu 610031,Sichuan,China)
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第1期30-39,共10页
Journal of Chang’an University(Natural Science Edition)
基金
国家自然科学基金项目(51778541)
中央高校基本科研业务费专项资金项目(2682019ZT05).
关键词
道路工程
沥青路面
温拌剂
减排
施工温度
施工排放物
road engineering
asphalt pavement
warm mix additive
emission reduction
construction temperature
emission from construction discharge
