CAJ | 학술논문

通过测定盐溶液浸蚀条件下的沥青与集料粘附性、沥青混合料残留稳定度、冻融劈裂等试验，对比分析了不同沥青种类和不同盐溶液浓度对沥青混合料材料水稳定性的影响，并结合化学－力学耦合理论分析了盐分对沥青混合料侵蚀机理。实验结果表明，SBS 改性沥青与集料的粘附性及耐盐浸蚀性能明显优于普通道路石油沥青，在沥青中预拌消石灰对改善粘附性作用不明显；Na2 SO4溶液对沥青与集料粘附性的浸蚀作用大于 NaCl 溶液；沥青与集料粘附性破坏属于化学一力学耦合损伤效应；沥青混合料随空隙率的增大，稳定度和残留稳定度降低，但流值变化规律不确定；初始的内部缺陷和损伤会导致沥青混凝土冻融劈裂抗拉强度的较大幅度降低。
통과측정염용액침식조건하적력청여집료점부성、력청혼합료잔류은정도、동융벽렬등시험，대비분석료불동력청충류화불동염용액농도대력청혼합료재료수은정성적영향，병결합화학－역학우합이론분석료염분대력청혼합료침식궤리。실험결과표명，SBS 개성력청여집료적점부성급내염침식성능명현우우보통도로석유력청，재력청중예반소석회대개선점부성작용불명현；Na2 SO4용액대력청여집료점부성적침식작용대우 NaCl 용액；력청여집료점부성파배속우화학일역학우합손상효응；력청혼합료수공극솔적증대，은정도화잔류은정도강저，단류치변화규률불학정；초시적내부결함화손상회도치력청혼응토동융벽렬항랍강도적교대폭도강저。
The adhesion between asphalt and aggregat、residual stability of asphalt mixture and the freeze-thaw splitting are tested sfter salt solution immersion.The influence of different asphalt and differ-ent salt solution for asphalt mixture is comparative analysed.The erosion mechanism of salt to asphalt mixture is discussed by chemical-mechanical coupling theory.The experimental results show that:the adhesion between SBS modified asphalt and aggregate and Salt erosion resistance excel ordinary road pe-troleum asphalt evidently.The adhesion function of asphalt preblended slaked lime is non constat.Ero-sion effect of Na2 SO4 solution is more obvious than NaCl solution.Adhesion destruction between asphalt and aggregate belongs to the damage effects of chemical mechanical coupling.Stability and residual sta-bility decrease by the increase of the void content of asphalt mixture,but the flow variation is uncertain. The initial internal defects and damage in asphalt concrete cause the freeze-thaw splitting tensile strength greatly reduce.