公路工程
公路工程
공로공정
Highway Engineering
2015年
5期
129-133,169
,共6页
路面工程%热再生混合料%高温稳定性%低温抗裂性%抗疲劳开裂性能
路麵工程%熱再生混閤料%高溫穩定性%低溫抗裂性%抗疲勞開裂性能
로면공정%열재생혼합료%고온은정성%저온항렬성%항피로개렬성능
road engineering%hot recycled mixture%high temperature stability%low temperature crack resistance%fatigue cracking resistance
热再生混合料 RAP 回收利用率低、抗裂性能不足是制约其适用性的关键技术指标，提出采用 SBS改性沥青生产厂拌热再生混合料，并基于车辙试验、小梁弯曲试验、四分点加载控制应变疲劳试验研究了不同 RAP掺量热再生混合料的温度敏感性、低温抗裂性抗疲劳开裂性能。试验结果表明：相比 SBS 改性沥青混合料，SBS 改性热再生混合料具有较好的抗永久变形能力，且随着 RAP 掺量增大改性热再生混合料温度敏感性降低；随着 RAP掺量增加，改性热再生混合料弯拉应变、单位体积破坏应变能均呈线性减小，RAP 掺量小于40％时，增大 RAP 掺量对改性热再生混合料低温抗裂性影响不大，RAP 掺量超过50％时，SBS 改性改性热再生混合料的疲劳性能显著降低，低温抗裂性和抗疲劳耐久性仍是制约改性热再生混合料 RAP 掺量的主要因素。
熱再生混閤料 RAP 迴收利用率低、抗裂性能不足是製約其適用性的關鍵技術指標，提齣採用 SBS改性瀝青生產廠拌熱再生混閤料，併基于車轍試驗、小樑彎麯試驗、四分點加載控製應變疲勞試驗研究瞭不同 RAP摻量熱再生混閤料的溫度敏感性、低溫抗裂性抗疲勞開裂性能。試驗結果錶明：相比 SBS 改性瀝青混閤料，SBS 改性熱再生混閤料具有較好的抗永久變形能力，且隨著 RAP 摻量增大改性熱再生混閤料溫度敏感性降低；隨著 RAP摻量增加，改性熱再生混閤料彎拉應變、單位體積破壞應變能均呈線性減小，RAP 摻量小于40％時，增大 RAP 摻量對改性熱再生混閤料低溫抗裂性影響不大，RAP 摻量超過50％時，SBS 改性改性熱再生混閤料的疲勞性能顯著降低，低溫抗裂性和抗疲勞耐久性仍是製約改性熱再生混閤料 RAP 摻量的主要因素。
열재생혼합료 RAP 회수이용솔저、항렬성능불족시제약기괄용성적관건기술지표，제출채용 SBS개성력청생산엄반열재생혼합료，병기우차철시험、소량만곡시험、사분점가재공제응변피로시험연구료불동 RAP참량열재생혼합료적온도민감성、저온항렬성항피로개렬성능。시험결과표명：상비 SBS 개성력청혼합료，SBS 개성열재생혼합료구유교호적항영구변형능력，차수착 RAP 참량증대개성열재생혼합료온도민감성강저；수착 RAP참량증가，개성열재생혼합료만랍응변、단위체적파배응변능균정선성감소，RAP 참량소우40％시，증대 RAP 참량대개성열재생혼합료저온항렬성영향불대，RAP 참량초과50％시，SBS 개성개성열재생혼합료적피로성능현저강저，저온항렬성화항피로내구성잉시제약개성열재생혼합료 RAP 참량적주요인소。
The RAP recycling utilization is low and the crack resistance is a key technology that limit the applicability of the indicators,In article using the SBS modified asphalt plant mix hot recycled mixture,and based on the rutting test,the trabecular bending test,four point load control strain fatigue test to study the temperature sensitivity,low temperature crack resistance,resistance to fatigue cracking performance of hot recycled mixture under different RAP content.The results show that:compared with SBS modified asphalt mixture,the SBS modification of hot recycled mixture has good ability to resist per-manent deformation,and the with the increase of RAP dosage,mixture temperature reduced susceptibili-ty;With the increase of dosage of RAP,modified hotrecycled mixture flexural strain and damage strain energy per unit volume is linearly decreases,and RAP content less than 40%,increasing the RAP con-tent of modified hot regeneration mixture has a little influence on the low temperature crack resistance, RAP content exceeds 50%,the fatigue property of modified SBS modified hot regeneration mixture signif-icantly reduced,low temperature crack resistance and fatigue resistance durability is still restricted modi-fied the main factors of hot recycled mixture RAP content.
