特种玄武岩纤维增强OGFC-13混合料配合比设计及路用性能试验  

Experiments of mix design and pavement performance for special basalt fiber reinforced asphalt mixture OGFC-13

作　　者：查旭东[1] 李康[1] 袁盛杰[1] 伍智吉 

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410004

出　　处：《长沙理工大学学报（自然科学版）》2016年第2期1-7,共7页Journal of Changsha University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(51078045)

摘　　要：为了提高开级配排水式磨耗层OGFC沥青混合料的稳定性和抗变形能力，采用一种絮状且性能优良的特种玄武岩纤维作为增强稳定剂。通过选取不同岩纤维掺量，分别进行了0GFC-13混合料的配合比设计及最佳油石比下的各项路用性能检验。研究结果表明，特种玄武岩纤维能很好地吸附沥青并将粗集料骨架粘结成牢固的整体，使得岩纤维增强OGFC--13的高温、低温和水稳等路用性能均得到明显的提高。然而，当岩纤维掺量过高时，部分岩纤维增强沥青胶浆因分散于OGFC-13的连通空隙中而造成空隙率降低，且少量分散不均的岩纤维易形成混合料结构中的薄弱点，从而影响混合料的路用性能。由此确定特种玄武岩纤维的适宜掺量范围为o．3％～o．5％，最佳掺量为0．4％，可供排水降噪沥青路面工程应用参考。In order to improve the stability and deformation resistance capacity of permeable open-graded friction course（OGFC） asphalt mixture, a kind of flocculent special basalt fiber with good performance is used as a reinforced stabilizer. By selecting different mixing a- mounts of the basalt fiber, the mixture ratios of OGFC--13 were designed, then various pavement performances of the OGFC--13 mixtures under the optimum asphalt aggregate ratios were tested. The results show that the special basalt fiber can adsorb asphalt very well to bond the coarse aggregate skeleton into a firm whole, then all the pavement per- formances of basalt fiber reinforced OGFC--13 including high temperature, low tempera- ture and water stability etc. are obviously improved. However, when the mixing amount of basalt fiber is too high, a part of basalt fiber reinforced asphalt mortar distributes in the connected voids of OGFC--13 to cause the reduction of void ratio, and a few basalt fiber with uneven dispersion is easy to form the weak points in the mixture structure, influencing the mixture pavement performances. Therefore, the suitable range of mixing amount of the special basalt fiber is determined as 0.3% 0.4 %. The results could provide references phah pavement with noise reduction. 0.5%, and the for the engineering optimum mixing amount is application of permeable as-phalt pavement with noise reduction.

关 键 词：特种玄武岩纤维 纤维增强 开级配排水式磨耗层 配合比设计 路用性能 掺量 

分 类 号：U414[交通运输工程—道路与铁道工程]