CAJ | 학술논문

为了研究改性沥青在高温条件下的粘弹性能，选择3种改性沥青在不同温度下进行多应力蠕变恢复试验（MSCR）。采用 Superpave 性能规范的最新指标对3种改性沥青的高温性能进行评价。结果表明：在0.1 kPa时，PE 改性沥青的平均恢复率 R100最大，并且不随温度发生较大改变；随着温度的升高，SBS、GTR改性沥青平均恢复率减小；在3．2 kPa时，3种改性沥青的平均恢复率 R3200较为接近；比较两种应力条件下的结果，在64℃、70℃时，PE 改性沥青由于应力增大，平均恢复率显著下降，平均不可恢复蠕变柔量 Jnr显著增大；因此，有必要考虑较大应力对改性沥青性能的影响。本试验结果与弹性恢复试验结果一致，可以考虑用 MSCR代替弹性恢复试验。由于采用了较大应力的加载方式以及平均恢复率、平均不可恢复蠕变柔量等评价指标，MSCR 能全面评价改性沥青的性能。
위료연구개성력청재고온조건하적점탄성능，선택3충개성력청재불동온도하진행다응력연변회복시험（MSCR）。채용 Superpave 성능규범적최신지표대3충개성력청적고온성능진행평개。결과표명：재0.1 kPa시，PE 개성력청적평균회복솔 R100최대，병차불수온도발생교대개변；수착온도적승고，SBS、GTR개성력청평균회복솔감소；재3．2 kPa시，3충개성력청적평균회복솔 R3200교위접근；비교량충응력조건하적결과，재64℃、70℃시，PE 개성력청유우응력증대，평균회복솔현저하강，평균불가회복연변유량 Jnr현저증대；인차，유필요고필교대응력대개성력청성능적영향。본시험결과여탄성회복시험결과일치，가이고필용 MSCR대체탄성회복시험。유우채용료교대응력적가재방식이급평균회복솔、평균불가회복연변유량등평개지표，MSCR 능전면평개개성력청적성능。
In order to study the visco-elastic property of modified asphalt binder at high tempera-ture,three modified asphalt binders were chosen to conduct the multiple stress creep recovery(MSCR) test at different temperature.The high temperature property of the three modified asphalt binders were evaluated by the latest index of Superpave Performance Standard.Results show that at the stress of 0. 1 kPa,the average recovery percent R100 of the PE modified asphalt binder is largest and stable,while for the other two modified asphalt binders the index decreases with the increase of temperature.At the stress of 3.2 kPa,the average recovery percent R3200 of three modified asphalt binders is closed.By compa-ring the result under the two different stress,it is suggested that for PE modified asphalt binder as the stress increases the average non-recoverable creep compliance Jnr increases and average recovery percent decreases at the temperature of 64 ℃ and 70 ℃.Thus ,it is necessary to consider the effect of larger stress on the property of modified asphalt binder.The elastic recovery test can be replaced by MSCR be-cause the result of two test are in agreement.MSCR can evaluate the property of modified asphalt binder because it adopts larger stress and the index of average recovery percent and non-recoverable creep com-pliance.