CAJ | 학술논문

通过对散体力学剪切模量公式的分析,提出以剪切模量为控制指标的沥青混合料级配设计方法,在设计步骤中充分考虑粗集料的剪切模量而不是以最小间隙率为控制指标,提高了沥青混合料的抗剪切性能,解决了沥青混合料出现高温稳定性不足易发生车辙病害的问题.新方法设计出的级配以粗集料形成抗剪骨架,细集料充分填充,最终形成骨架抗剪密实结构.通过室内试验比较分析,其高温稳定性和水稳定性优于比较级配,低温抗裂性满足规范要求,证明了以剪切模量为控制指标的级配设计方法,可以提高沥青混合料料的高温稳定性,减少高速公路车辙病害的发生.
통과대산체역학전절모량공식적분석,제출이전절모량위공제지표적력청혼합료급배설계방법,재설계보취중충분고필조집료적전절모량이불시이최소간극솔위공제지표,제고료력청혼합료적항전절성능,해결료력청혼합료출현고온은정성불족역발생차철병해적문제.신방법설계출적급배이조집료형성항전골가,세집료충분전충,최종형성골가항전밀실결구.통과실내시험비교분석,기고온은정성화수은정성우우비교급배,저온항렬성만족규범요구,증명료이전절모량위공제지표적급배설계방법,가이제고력청혼합료료적고온은정성,감소고속공로차철병해적발생.
Through the analysis of formula of Shear Modulus in particulate material mechanics,a new grading design method to improve the anti-shearing performance of asphalt mixture was put forward.Shear Modulus of coarse aggregate instead of minimum voids of mineral aggregate was fully considered in new grading design method to solve the problem of rutting which destroys the pavement of the expressway due to poor high-temperature stability through improving the anti-shearing ability of particulate material of asphalt mixture.Anti-shearing framework dense structure was formed in new design method by the combination of coarse and fine aggregate.Through the test in laboratory,the new gradation has better high-temperature stability and water stability than the other gradation,the low-temperature stability meets the requirement of specification,which proves that the new grading design method is practical to improve the high-temperature stability of asphalt mixture and decrease the possibility of rutting in expressway.