CAJ | 학술논문

CRTSⅡ型板式无砟轨道充填层 CA砂浆与轨道板接触面之间常见脱粘、离缝情况。为探讨 CA 砂浆在温度疲劳作用下与轨道板脱粘、离缝规律，采用－20℃到60℃的温度循环对试件进行疲劳试验，并对疲劳后的试件进行微观结构分析和热分析。结果表明：由于沥青基体在温度疲劳作用下的迁移、老化、黏性降低，CRTSⅡ型 CA砂浆和轨道板混凝土经过16次循环后即出现脱粘，产生裂缝。
CRTSⅡ형판식무사궤도충전층 CA사장여궤도판접촉면지간상견탈점、리봉정황。위탐토 CA 사장재온도피노작용하여궤도판탈점、리봉규률，채용－20℃도60℃적온도순배대시건진행피로시험，병대피로후적시건진행미관결구분석화열분석。결과표명：유우력청기체재온도피노작용하적천이、노화、점성강저，CRTSⅡ형 CA사장화궤도판혼응토경과16차순배후즉출현탈점，산생렬봉。
There are common debonding phenomenon between the track slab surface and CA mortar in CRTSⅡslab-type ballastless track f illing layer. In order to explore the discipline of debonding betw een the slab and C A mortar under the effect of temperature fatigue,the fatigue test was carried out on the test pieces by using -20 ℃ to 60 ℃ temperature cycle,microstructure analysis and thermal analysis was performed for test pieces after fatigue test. The research results showed that debonding between the slab concrete and CA mortar appears after 16 times cycle as the migration,aging and viscosity decrease of asphalt matrix under the effect of temperature fatigue.