CAJ | 학술논문

为了更准确地模拟夏季高温多雨气候影响下沥青路面性能的变化情况，针对降水、高温和日照3种环境因素综合作用的特点，设计了室内水-温-光循环试验。定量分析了不同油石比情况下，沥青混合料在经历不同水-温-光循环次数后的空隙率、饱水率、劈裂抗拉强度及冻融劈裂抗拉强度的变化规律。提出了衰减系数的概念，并建立了劈裂抗拉强度和冻融劈裂抗拉强度衰减模型。研究结果表明：在水-温-光循环作用下，油石比的增大可以减小空隙率和饱水率的变化，也可以抵制沥青混合料的强度和水稳定性的衰减，但对其初期强度和水稳定性是不利的。
위료경준학지모의하계고온다우기후영향하력청로면성능적변화정황，침대강수、고온화일조3충배경인소종합작용적특점，설계료실내수-온-광순배시험。정량분석료불동유석비정황하，력청혼합료재경력불동수-온-광순배차수후적공극솔、포수솔、벽렬항랍강도급동융벽렬항랍강도적변화규률。제출료쇠감계수적개념，병건립료벽렬항랍강도화동융벽렬항랍강도쇠감모형。연구결과표명：재수-온-광순배작용하，유석비적증대가이감소공극솔화포수솔적변화，야가이저제력청혼합료적강도화수은정성적쇠감，단대기초기강도화수은정성시불리적。
In order to accurately simulate the attenuation performance of the asphalt mixture in the hot and rainy cli-mate in summer, and assess the combined action of rainfall, high temperature and sunshine, the experiment of wa-ter-temperature-radiation circulation was designed. The changes of air void, saturated water ratio, split tensile strength and freeze-thaw splitting tensile strength were quantitatively analyzed under the condition of different water-temperature-radiation cycle times and different asphalt-aggregate ratios. The concept of "attenuation coefficient"was put forward and attenuation models of split tensile strength and freeze-thaw splitting tensile strength were estab-lished. The results show that, under the effect of water-temperature-radiation cycle, the asphalt mixture of higher asphalt-aggregate ratio can mitigate the change of air void and saturated water ratio, as well as the attenuation of as-phalt mixture strength and water stability. However, it is adverse for the initial strength and water stability of the as-phalt mixture.