CAJ | 학술논문

为了在微观尺度下分析橡胶改性沥青及老化特征，制备了普通橡胶沥青和脱硫橡胶沥青，首先分析了两种橡胶改性沥青制作前后橡胶颗粒的变化特征，然后通过凝胶渗透色谱实验建立了两种橡胶改性沥青的分子量分布与宏观路用性能的对应关系，最后综合宏观技术指标与红外光谱半定量分析研究了两种橡胶改性沥青的老化特征。结果表明，经过高速剪切工艺大粒径的脱硫橡胶粒在沥青里大多分散成无明显颗粒的细小物质，而普通橡胶粉剪切后基本保持其原有颗粒核心；普通橡胶沥青具有最高的大分子 LMS 的比例，这与其最优异的高温稳定性与低温抗裂性相对应；普通橡胶沥青的 TFOT 短期老化中存在着强烈的胶粉持续溶胀作用，但在 PAV 长期老化中主要发生氧化老化作用，而脱硫橡胶沥青的 TFOT 短期老化和PAV 长期老化均以沥青的氧化老化为主；普通橡胶沥青比脱硫橡胶沥青更加耐受 TFOT 短期老化。
위료재미관척도하분석상효개성력청급노화특정，제비료보통상효력청화탈류상효력청，수선분석료량충상효개성력청제작전후상효과립적변화특정，연후통과응효삼투색보실험건립료량충상효개성력청적분자량분포여굉관로용성능적대응관계，최후종합굉관기술지표여홍외광보반정량분석연구료량충상효개성력청적노화특정。결과표명，경과고속전절공예대립경적탈류상효립재력청리대다분산성무명현과립적세소물질，이보통상효분전절후기본보지기원유과립핵심；보통상효력청구유최고적대분자 LMS 적비례，저여기최우이적고온은정성여저온항렬성상대응；보통상효력청적 TFOT 단기노화중존재착강렬적효분지속용창작용，단재 PAV 장기노화중주요발생양화노화작용，이탈류상효력청적 TFOT 단기노화화PAV 장기노화균이력청적양화노화위주；보통상효력청비탈류상효력청경가내수 TFOT 단기노화。
In order to analyze the crumb rubber modified asphalt and its aging characteristics on microscale,as-phalt-rubber(AR)and desulfurized rubber asphalt(DRA)were produced,first the two kinds of rubber particle characteristics were analyzed both before the crumb rubber modified asphalt were made and after,then the rela-tionship between molecular weight distribution of the two kinds of crumb rubber modified asphalt and their road performance was established by gel permeation chromatography (GPC)test,at last their aging characteristics were researched based on both technique index results and Fourier transform infrared (FT-IR)spectroscopy semi-quantitative analysis.The result showes that,after high speed shearing process desulfurized rubber parti-cles were dispersed into minimal ones in the asphalt,but the ordinary crumb rubber also kept their particle cores after sheared;AR has the largest proportion of large molecular size(LMS)correspond with the best road performance at high or low temperature;AR continues in a strong swelling in TFOT short-term aging,while oxidation aging is dominating in PAV long-term aging,but to DRA oxidation aging is dominating both in TFOT short-term and PAV long-term aging;the aging resistance of AR in TFOT short-term aging was better than that of DRA.