长沙理工大学学报（自然科学版）
長沙理工大學學報（自然科學版）
장사리공대학학보（자연과학판）
Journal of Changsha University of Science and Technology(Natural Science)
2014年
2期
1-8
,共8页
沥青混合料%疲劳性能%水作用%级配%空隙率
瀝青混閤料%疲勞性能%水作用%級配%空隙率
력청혼합료%피로성능%수작용%급배%공극솔
asphalt mixture%fatigue performance%water intrusion%gradation%void ratio
为了便于高温潮湿多雨地区和季节性冰冻地区选用合适的水处理方式评价沥青混合料水稳定性，设计制备了3种级配、4种空隙率的 AC-13沥青混合料，通过间接拉伸疲劳试验，研究了不同水作用方式(高温浸水和冻融循环)对它们疲劳性能的影响。试验结果表明，水作用会明显降低沥青混合料的疲劳性能，并且冻融循环的不利影响更为严重；细集料多、空隙率小的沥青混合料的疲劳性能较好，其疲劳寿命对荷载应力也更为敏感。设计和施工时应保证沥青混合料空隙率在4%~5%之间，以降低水作用对沥青混合料疲劳性能的影响程度。同时，评价了水作用对 Superpave级配禁区上下方的沥青混合料疲劳性能的影响，并探讨分析了高温浸水和冻融循环影响不同空隙率的沥青混合料疲劳性能的作用机制。
為瞭便于高溫潮濕多雨地區和季節性冰凍地區選用閤適的水處理方式評價瀝青混閤料水穩定性，設計製備瞭3種級配、4種空隙率的 AC-13瀝青混閤料，通過間接拉伸疲勞試驗，研究瞭不同水作用方式(高溫浸水和凍融循環)對它們疲勞性能的影響。試驗結果錶明，水作用會明顯降低瀝青混閤料的疲勞性能，併且凍融循環的不利影響更為嚴重；細集料多、空隙率小的瀝青混閤料的疲勞性能較好，其疲勞壽命對荷載應力也更為敏感。設計和施工時應保證瀝青混閤料空隙率在4%~5%之間，以降低水作用對瀝青混閤料疲勞性能的影響程度。同時，評價瞭水作用對 Superpave級配禁區上下方的瀝青混閤料疲勞性能的影響，併探討分析瞭高溫浸水和凍融循環影響不同空隙率的瀝青混閤料疲勞性能的作用機製。
위료편우고온조습다우지구화계절성빙동지구선용합괄적수처리방식평개력청혼합료수은정성，설계제비료3충급배、4충공극솔적 AC-13력청혼합료，통과간접랍신피로시험，연구료불동수작용방식(고온침수화동융순배)대타문피로성능적영향。시험결과표명，수작용회명현강저력청혼합료적피로성능，병차동융순배적불리영향경위엄중；세집료다、공극솔소적력청혼합료적피로성능교호，기피로수명대하재응력야경위민감。설계화시공시응보증력청혼합료공극솔재4%~5%지간，이강저수작용대력청혼합료피로성능적영향정도。동시，평개료수작용대 Superpave급배금구상하방적력청혼합료피로성능적영향，병탐토분석료고온침수화동융순배영향불동공극솔적력청혼합료피로성능적작용궤제。
In order to choose the appropriate water treatment to evaluate water stability of asphalt mixture in the hot humid rainy areas and seasonal frozen regions,asphalt mixture of AC-1 3 including three types of gradations and four types of void ratio were designed.The effects of different types of water intrusion (hot water immersion and freeze-thaw cycle)on their fatigue performance were studied by indirect tensile fatigue test.Test results indicated that water intrusion significantly reduced the fatigue performance of asphalt mixture and the negative impact of the freeze-thaw cycle was more serious.When the asphalt mixture was of more fine aggregate and smaller void ratio its fatigue performance was better and its fatigue life was also more sensitive to load stress.In order to avoid asphalt mixture fatigue perform-ance being affected by water effect,void ratio should be ensured between 4% ~ 5% during the design and construction process.At the same time,the influence of water intrusion on the fatigue performance of asphalt mixture with gradation above and below the Superpave limited zone was evaluated.The impact mechanism of hot water immersion and freeze-thaw cycle on asphalt mixture with different void ratio was analyzed.
