CAJ | 학술논문

以SK-90沥青为基质沥青,分别加入相同掺量(与沥青质量比为5％、10％、15％和20％)的 DCLR 和 TLA,利用SHRP PG、针入度分级体系、红外光谱仪和凝胶色谱仪对比分析DCLR和TLA共混改性沥青的宏观性能和微观结构的变化。结果表明,DCLR和TLA的加入均可以改善沥青的高温性能,但对沥青的低温性能和疲劳性能产生一定的不利影响。同时,根据DCLR和TLA共混改性沥青的官能团和分子量分布的变化可以判断DCLR和TLA对沥青的改性作用主要为物理改性,在某种程度上,DCLR不能完全替代TLA。
이SK-90력청위기질력청,분별가입상동참량(여력청질량비위5％、10％、15％화20％)적 DCLR 화 TLA,이용SHRP PG、침입도분급체계、홍외광보의화응효색보의대비분석DCLR화TLA공혼개성력청적굉관성능화미관결구적변화。결과표명,DCLR화TLA적가입균가이개선력청적고온성능,단대력청적저온성능화피로성능산생일정적불리영향。동시,근거DCLR화TLA공혼개성력청적관능단화분자량분포적변화가이판단DCLR화TLA대력청적개성작용주요위물리개성,재모충정도상,DCLR불능완전체대TLA。
The DCLR and TLA content are 5%, 10%, 15% and 20% by mass of SK-90 base asphalt respectively. The properties and microstructures of DCLR and TLA blending modified asphalts are tested by SHRP PG, penetration system, infrared spectrometer and gel permeation chromatograph. It indicates that adding DCLR and TLA can improve the high-temperature properties of asphalts, but the low-temperature and fatigue resistance of asphalts are declined. Based on the functional group and molecular weight distribution of asphalts, it predicts that the physical modification be happened in the DCLR and TLA blending modified asphalt. Meanwhile, the DCLR cannot replace TLA totally.