黑龙江交通科技
黑龍江交通科技
흑룡강교통과기
Communications Science and Technology Heilongjiang
2015年
8期
1-2,4
,共3页
道路工程%高模量%疲劳性能%旧料掺量
道路工程%高模量%疲勞性能%舊料摻量
도로공정%고모량%피로성능%구료참량
road engineering%high modulus%fatigue performance%content of old material%asphalt mixture
采用控制应力的方式进行三分点加载的弯曲试验对不同级配、不同油石比、不同旧料掺量下的高模量沥青混合料疲劳特性进行了试验研究。试验结果表明:接近AC-20中值的级配C疲劳性能最优;随着油石比的增大,高模量沥青混合料的疲劳性能不断提升;掺加旧料后,高模量沥青混合料的疲劳性能有所降低。随着旧料掺量的增加,混合料的疲劳性能先提高后降低,在旧料掺量为40%时达到最优。
採用控製應力的方式進行三分點加載的彎麯試驗對不同級配、不同油石比、不同舊料摻量下的高模量瀝青混閤料疲勞特性進行瞭試驗研究。試驗結果錶明:接近AC-20中值的級配C疲勞性能最優;隨著油石比的增大,高模量瀝青混閤料的疲勞性能不斷提升;摻加舊料後,高模量瀝青混閤料的疲勞性能有所降低。隨著舊料摻量的增加,混閤料的疲勞性能先提高後降低,在舊料摻量為40%時達到最優。
채용공제응력적방식진행삼분점가재적만곡시험대불동급배、불동유석비、불동구료참량하적고모량력청혼합료피로특성진행료시험연구。시험결과표명:접근AC-20중치적급배C피로성능최우;수착유석비적증대,고모량력청혼합료적피로성능불단제승;참가구료후,고모량력청혼합료적피로성능유소강저。수착구료참량적증가,혼합료적피로성능선제고후강저,재구료참량위40%시체도최우。
The different gradations and aggregate ratio, the fatigue properties of high modulus asphalt old material content under different mixes were tested by thirds point bending test on the way to control stress.The results showed that:the gra-dation C closed to the AC-20 C values is optimal fatigue performance; With the increase of aggregate ratio, the fatigue properties of high modulus asphalt mixture is increased.The fatigue performance of high modulus asphalt mixture decreased by mixing old material.With increasing content of old material, the fatigue properties of the mixture of first increased and then decreased ,and the old material dosage of 40%become to achieve optimal.