CAJ | 학술논문

为进一步研究采用砾石骨料的心墙沥青混凝土水稳定性能，以砾石骨料为原材料制备沥青混凝土试件，进行了水稳定试验、浸水及真空饱水马歇尔试验和改进的冻融劈裂试验，试验结果表明：水稳试件的水稳定系数为0．99，满足规范大于0．90的要求；浸水及真空饱水试件随着浸泡时间的增加其残留稳定度有所下降，浸水试件及真空饱水试件残留稳定度最大下降率分别为1．4％、3．9％，下降不明显。劈裂抗拉强度比随冻融循环次数的增加有所下降，劈裂抗拉强度比最大下降率为5％；冻融劈裂试件密度随着冻融循环次数的增加略有下降，下降值在0．2％～0．9％之间，但孔隙率仍能满足规范中不大于2％的要求，可以看出心墙沥青混凝土在恶劣试验条件下水稳定性仍然是有保证的。为完善心墙沥青混凝土水稳定性试验方法及砾石骨料的应用提供参考依据。
위진일보연구채용력석골료적심장력청혼응토수은정성능，이력석골료위원재료제비력청혼응토시건，진행료수은정시험、침수급진공포수마헐이시험화개진적동융벽렬시험，시험결과표명：수은시건적수은정계수위0．99，만족규범대우0．90적요구；침수급진공포수시건수착침포시간적증가기잔류은정도유소하강，침수시건급진공포수시건잔류은정도최대하강솔분별위1．4％、3．9％，하강불명현。벽렬항랍강도비수동융순배차수적증가유소하강，벽렬항랍강도비최대하강솔위5％；동융벽렬시건밀도수착동융순배차수적증가략유하강，하강치재0．2％～0．9％지간，단공극솔잉능만족규범중불대우2％적요구，가이간출심장력청혼응토재악렬시험조건하수은정성잉연시유보증적。위완선심장력청혼응토수은정성시험방법급력석골료적응용제공삼고의거。
To further study the water stable performance of using gravel aggregate's core wall asphalt concrete ,gravel aggregate as raw material preparation of asphalt concrete specimen ,water stability test ,soaking and vacuum saturated marshal test and improved freeze-thaw splitting test were carried out .The results show that water stability specimen stability coefficient is 0 .99 ,and meets the regulatory requirements .immersion and vacuum water saturated specimens with immersion time increasing the residual stability de‐cline ,the immersion specimens and vacuum saturated specimens'residual stability biggest decline rates are 1 .4% and 3 .9% respec‐tively ,the decline is not obvious .The porosity was still able to meet the specification requirements of within 2% .It can be seen that the core wall asphalt concrete's water stability is still guaranteed under harsh conditions .This paper serves as a reference for impro‐ving the water stability of asphalt concrete core wall test methods and gravel aggregate applications .