CAJ | 학술논문

对照优质道路沥青改性剂TLA,考察了六种煤基重质产物对滨州90#沥青的改性作用及作用原理.实验结果表明,六种改性剂对滨州90#沥青均表现出一定的改性作用.依据美国ASTM D5710-95以及英国BSI BS3690对TLA改性沥青的标准,六种改性沥青中,四种符合标准要求,其余两种不符合延度指标要求.FT-IR谱图分析表明,煤液化或煤油共处理重质产物的添加,没有生成新官能团,但使官能团的分布发生了变化,从而改善了基质沥青的路用性能,添加TLA,可增加CO和SO极性官能团,可增加沥青与石料的作用;煤焦油沥青过高的芳香结构,妨碍了其与基质沥青的混合作用.结合四组分分析结果,基于沥青胶体化学理论分析,发现不符合要求的改性沥青具有较高的饱和分含量,导致了较小的CI值(胶体指数),不利于沥青胶体结构的稳定.按线性加和法计算得到的改性沥青CI值与实测值的差距表明,改性过程包含有一定程度的化学反应.
대조우질도로력청개성제TLA,고찰료륙충매기중질산물대빈주90#력청적개성작용급작용원리.실험결과표명,륙충개성제대빈주90#력청균표현출일정적개성작용.의거미국ASTM D5710-95이급영국BSI BS3690대TLA개성력청적표준,륙충개성력청중,사충부합표준요구,기여량충불부합연도지표요구.FT-IR보도분석표명,매액화혹매유공처리중질산물적첨가,몰유생성신관능단,단사관능단적분포발생료변화,종이개선료기질력청적로용성능,첨가TLA,가증가CO화SO겁성관능단,가증가력청여석료적작용;매초유력청과고적방향결구,방애료기여기질력청적혼합작용.결합사조분분석결과,기우력청효체화학이론분석,발현불부합요구적개성력청구유교고적포화분함량,도치료교소적CI치(효체지수),불리우력청효체결구적은정.안선성가화법계산득도적개성력청CI치여실측치적차거표명,개성과정포함유일정정도적화학반응.
In comparison with the supreme commercial paving asphalt modifier TLA, three heavy products derived from the co-processing of coal with FCC slurry and one heavy product from a bench scale continuing coal liquefaction process have a similar modification ability to the same base asphalt (Binzhou 90#). Two modified asphalts (one by coal tar pitch and another one by the product from the co-processing) are excluded due to the dissatisfaction on ductility. FT-IR analysis shows that the addition of coal-derived heavy products does not form any new functional group, but results in a new distribution of the functional groups which can improve the behavior of the base asphalt. The addition of TLA can increase C＝O and S＝O functional groups, which should be favorable for the interaction of asphalt binder and limestone. The higher aromaticity of the coal tar pitch may inhibit its mixing and interaction with the base asphalt. Two unsatisfied modified asphalts have a lower colloidal index (CI). The difference between the theoretically calculated CI and the experimental CI of modified asphalt indicates that the chemical reaction may occur between the base asphalt and the additives.