MFL融冰技术在沥青路面中的应用分析

Application Analysis of MFL Ice-melting Technology in Asphalt Pavement

为有效评价MFL融冰沥青混合料的路用性能,文章以河北省大庆至广州高速公路深圳至大名(冀豫界)段BM-3合同段项目为工程依托,通过采用车辙试验、冻融劈裂试验、饱和浸水马歇尔试验和低温弯曲试验评价了MFL掺加用量等因素对沥青混合料路用性能的影响。结果表明:MFL材料能够降低沥青混合料动稳定度指标、残留稳定度指标、冻融劈裂强度比指标和最大弯拉应变指标,且随掺量增加,劣化程度愈显著,其中掺量在6%~8%时,对路用性能劣化程度更为显著,但MFL融冰沥青混合料各项性能指标均满足规范要求,建议实体工程应用需要采取相应措施改善其路用性能,推荐用量宜控制在5%~6%。

In order to effectively evaluate the road performance of MFL ice-melting asphalt mixture, rel- ying on the BM-3 contract segment project of Shenzhen- Daming （Jiyu boundary） section of Daqing- Guangzhou Expressway in Hebei Province,and through the rut test,freeze-thaw splitting test,saturat- ed flooding Marshall test and low-temperature bending test,this article evaluated the influence of MFL content and other factors on the road performance of asphalt mixture.The results showed that the MFL material can reduce the dynamic stability index, residual stability index, freeze-thaw splitting strength ratio index and maximum bending strain index of asphalt mixture, and with the increase of the content, the deterioration degree is more obvious,and when the content is 6%- 8% ,the deterioration degree of road performance is more significant, but all performance indicators of MFL ice-melting asphalt mix- ture can meet the specification requirements, thus it is recommended that the physical engineering ap- plications shall take appropriate measures to improve its road performance, and the recommended content should be controlled within 5% ~ 6%.