CAJ | 학술논문

用纳米TiO2的光催化特性，将其掺入到公路的沥青路面中，在太阳光中紫外线的照射下，与吸附到沥青道路表面的氮氧化物NOx发生光催化降解反应，研究了沥青混合料的高温稳定性能、水稳定性能；采用沥青路面材料仿真测试程序，进行沥青混合料吸收/降解汽车尾气的效果评价。结果表明：纳米TiO2颗粒以干掺工艺掺入沥青混合料后，混合料的动稳定度均有显著提高，各组沥青混合料的相对变形均呈现下降趋势；外掺20％的纳米TiO2后，沥青混合料可以得到较为理想的高温稳定性能和经济指标。纳米TiO2颗粒以干掺法和等掺法两种方式掺入沥青混合料后，其劈裂强度和冻融劈裂强度均较未掺入时明显降低，且随着纳米TiO2掺量的增加而不断下降。选用等掺法的工艺掺入，其对尾气的吸收/降解效果可达到NOx 气体组分降解24％左右。同时，纳米TiO2掺量最优值为矿粉质量的20％～40％。
용납미TiO2적광최화특성，장기참입도공로적력청로면중，재태양광중자외선적조사하，여흡부도력청도로표면적담양화물NOx발생광최화강해반응，연구료력청혼합료적고온은정성능、수은정성능；채용력청로면재료방진측시정서，진행력청혼합료흡수/강해기차미기적효과평개。결과표명：납미TiO2과립이간참공예참입력청혼합료후，혼합료적동은정도균유현저제고，각조력청혼합료적상대변형균정현하강추세；외참20％적납미TiO2후，력청혼합료가이득도교위이상적고온은정성능화경제지표。납미TiO2과립이간참법화등참법량충방식참입력청혼합료후，기벽렬강도화동융벽렬강도균교미참입시명현강저，차수착납미TiO2참량적증가이불단하강。선용등참법적공예참입，기대미기적흡수/강해효과가체도NOx 기체조분강해24％좌우。동시，납미TiO2참량최우치위광분질량적20％～40％。
We used the photo catalytic properties of nano-TiO2 to generate the photo catalytic degradation reactions with NOx on the UV irradiation, and studied the stability in high temperature and water environment .We used the asphalt pavement simulation program to estimate the degradation of exhaust from the automobiles .The dynamics stability of asphalt mixture has a significant increase after nano-TiO2 mixed by the dry method.On the mixture of 20%nano-TiO2 , the asphalt mixture can get a better stability in high temperature and economic indicators.The cleavage strength and freeze-thaw splitting strength are all decreased as the mixture of nano-TiO2 is increased after mixed by the dry and equal method.The ratio of degradation to the exhaust from the automobiles can reach to 24%after the nano-TiO2 mixed by equal method.The optical mixture of nano-TiO2 in the asphalt mixture is 20%to 40%by weight.