纤维微表处混合料性能试验  

Experimental study on performances of fibre reinforced micro-surfacing mixture

作　　者：侯曙光[1] 侯强 

机构地区：[1]南京工业大学交通学院,江苏南京210009 [2]河南省高远公路养护技术有限公司,河南新乡453003

出　　处：《南京工业大学学报（自然科学版）》2013年第3期20-24,共5页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家自然科学基金(51108237)

摘　　要：针对微表处混合料的抗裂、抗变形不足等问题,采用加纤技术并运用纤维分散试验、纤维微表处混合料拌合试验、路用性能试验及低温抗裂试验对其性能进行研究。结果表明:采用自主研制的专用设备进行纤维分散,可保证加纤微表处混合料中纤维的均匀分布;纤维微表处混合料中纤维的适宜长度为6 mm;纤维添加量为0.2%时,加纤微表处混合料1 h及6 d时的湿轮磨耗值最小;纤维添加量为0.1%时,混合料黏附砂量最小,但和纤维添加量为0.2%时混合料粘附砂量差别不大;纤维添加量为0.3%时,加纤微表处混合料低温劈裂强度最大。综合各指标结果,确定纤维添加量为0.2%时,纤维微表处混合料总体路用性能最佳。Aimed at problems of insufficient resistance to cracking and deformation of micro-surfacing mix- tures ,a fibre reinforced micro-surfacing technique was put forward and its performances were studied. The fibre dispersion, the mixing time, the road performance, and the low-temperature resistance to cracking tests of fibre reinforced micro-surfacing mixtures were carried out. The results indicated that the fibres in fibre re- inforced micro-surfacing mixtures could be homogeneously dispersed using the self-developed special equip- ment. The suitable length of fibres in fibre reinforced micro-surfacing mixtures was 6 ram. When the added volume of fibres was 0. 2%, 1 h and 6 d wet track abrasion values were the minimums. When the added vol- ume of fibres was 0. 1% ,the volume of load wheel test （LWT） sand adhesion was the smallest,and as the added volume of fibres was 0. 2% ,the fibre reinforced micro-surfacing mixture showed better performances and moreover, there was not much difference in the sand adhesion between these two added volumes of fi- bres. When the added volume of fibres was 0. 3%, the low-temperature splitting strength was the greatest. According to the test results of various indexes 0. 2% was selected as the optimum added volume of fibres thus it could obtain the better comprehensive performances.

关 键 词：道路工程 纤维 微表处混合料 拌合试验 路用性能 

分 类 号：U416.217[交通运输工程—道路与铁道工程]