TLA改性沥青胶浆老化特性研究

为了研究TLA改性沥青胶浆老化性能的特性,采用薄膜烘箱试验模拟了胶浆的老化,分析测试了TLA掺量及沥青胶浆粉胶质量比对TLA改性沥青胶浆老化性能的影响,同时与未经老化的沥青胶浆性能进行对比。结果表明,经过TLA改性对沥青胶浆有重要的影响,且老化后,其对沥青胶浆的影响更为显著,TLA掺量以20%为分界点,低于20%时,对沥青胶浆的性能影响显著,但掺量超过20%,其影响作用减弱;粉较比的变化同样存在明显的分界点,当其低于0.8时,变化对沥青胶浆的性能影响显著,超过0.8时,影响作用减缓,粉胶比的变化对相位角的影响较弱。试验同时发现,老化后,沥青胶浆的高温性能有增强作用,但却减弱了其低温性能。

Study of the Aging Characters of TLA Modified Asphalt Mortar

In order to study the aging characters of TLA modified asphalt mortar,this paper uses the Rolling Thin Film Oven Tests to simulate aging mortar,the high temperature and low temperature performances of asphalt mortar at different amounts and mass ratios of mineral powder were and studied,also the asphalt mortar not aging was studied to compare.It is found that the TLA asphalt has a great impact on the asphalt mortar characters,but the impact is more notable when the the mortar aged.Through the studies,when the amounts of TAL is less than 20%,the changes of amounts have great influence on the performances of asphalt mortar,while when the amounts of TAL above 20%,the influence would be less.The mass ratio of mineral powder has the same regular,when the demarcated is 0.8,the changes of amounts have great influence on the performances of asphalt mortar,while when the demarcated above 20%,the influence would be less.The research also found that the aging could enhance the high temperature performances of asphalt,but weaken its low temperature performances.