摘要
为减少沥青路面建设-运营-养护期沥青有害物排放,实现道路沥青全寿命周期自减排,提出了减排剂定向合成目标,设计并研制了兼具“微孔-介孔-大孔”多级孔径结构及自发极化效应的新型沥青减排剂,制备了长效自减排改性沥青材料,明确了其路用性能;提出了“建设-运营-养护”全寿命周期自减排改性沥青材料减排功效测试评价方法,深入研究了自减排沥青材料全寿命周期减排功效演变规律,揭示了自减排改性沥青减排功效协同增强作用机理。结果表明:与普通沥青胶浆相比,自减排改性沥青材料高、低温流变及疲劳性能均有不同程度的提升;全寿命周期内,自减排改性沥青材料实现了对CO_(2)、CO、SO_(2)、NOx、H_(2)S、TVOC、PM2.5及PM10等各项有害物主要成分的高效均衡减排,其减排功效随减排剂掺量增加而增强。针对各项有害物主要成分,自减排改性沥青的建设期减排率均超过54%(TVOC减排率最高,达70%);运营期减排率均超过48%(TVOC减排率最高,达64%);养护期,老化后自减排改性沥青减排率变异系数均小于5%。自减排改性沥青混合料/混凝土的建设期减排率均超过54%(PM10减排率最高,达75%),运营期减排率均超过48%(NOx减排率最高,达62%)。自减排改性沥青及其混合料/混凝土的全寿命周期减排功效长效持久。减排剂借助多孔结构及静电场作用吸附了沥青有害物,而后依靠晶体内部电荷迁移原理还原降解了孔内有害物,物理吸附及电荷迁移作用协同增强了自减排改性沥青减排功效。
The purpose of this study was to reduce the emissions of harmful asphalt substances from asphalt pavements during the construction,operation,and maintenance periods and achieve self-emission reduction throughout the full life cycle of road asphalt.A directional synthesis target for an emission-reduction agent was proposed.A new type of emission-reduction agent with a“micropore-mesopore-macropore”multi-level pore structure and a spontaneous polarization effect was designed and developed.A modified asphalt material with long-lasting self-emission reduction was prepared,and its road performance was evaluated.A test and evaluation method for the emission reduction efficacy of self-emission-reduction-modified asphalt materials during the full life cycle consisting of construction,operation,and maintenance was proposed.The evolution of the emission reduction efficacy of self-emission-reduction-modified asphalt materials over their full life cycle was thoroughly studied.A synergistic enhancement mechanism of the emission reduction efficacy of the self-emission-reduction-modified asphalt was revealed.The results show that compared with common asphalt mortar,self-emission-reduction-modified asphalt materials exhibit varying degrees of improvement in their high-and low-temperature rheological and fatigue properties.Over their full life cycle,self-emission-reduction-modified asphalt materials achieved efficient and balanced emission reductions of various harmful components such as CO_(2),CO,SO_(2),NOx,H_(2)S,TVOC,PM2.5,and PM10.The emission reduction effect increased with an increase in the dosage of the emission-reduction agent.During the construction period,the emission reduction rate of the self-emission-reduction-modified asphalt exceeded 54%for all major pollutant components,and the TVOC emission reduction rate was the highest,reaching 70%.During the operation period,the emission reduction rate exceeded 48%and the TVOC emission reduction rate was the highest,reaching 64%.During the curing period,the variation coeff
作者
王朝辉
王梦浩
陈谦
左志武
李小刚
WANG Chao-hui;WANG Meng-hao;CHEN Qian;ZUO Zhi-wu;LI Xiao-gang(School of Highway,Chang'an University,Xi'an 710064,Shaanxi,China;Shandong Hi-speed Group Co.Ltd.,Jinan 250098,Shandong,China;Shaanxi Provincial Transport Environmental Monitoring Center,Xi'an 710065,Shaanxi,China)
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2023年第12期183-196,共14页
China Journal of Highway and Transport
基金
陕西省创新能力支撑计划项目(2022TD-07)
山东高速集团有限公司科技项目(SDGS-2023-0141)
陕西省重点研发计划项目(2023JBGS-18)
中国博士后科学基金项目(2023M730356)。
关键词
路面工程
自减排改性沥青
有害物测试
减排功效
制备
作用机理
pavement engineering
self-emission reduction modified asphalt
testing for harmful substances
emission reduction efficacy
preparation
mechanism
