UTW路面用混凝土试验研究  

Experimental Study of Concrete for Ultra-thin Whitetopping Pavement

作　　者：马骉[1] 胡长顺[1] 路学敏 李成才 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]陕西省铜川公路管理局,陕西铜川727000

出　　处：《公路交通科技》2003年第6期8-12,共5页Journal of Highway and Transportation Research and Development

基　　金：陕西省自然科学基金资助项目(2001C02)

摘　　要：对普通混凝土、钢纤维混凝土、聚丙烯纤维混凝土和网状聚丙烯纤维混凝土进行强度性能和疲劳性能的室内对比试验,结果表明:钢纤维和Fibermesh网状聚丙烯纤维对混凝土抗弯拉强度改善明显;掺入三种纤维后提高了混凝土的柔韧性,尤其是网状聚丙烯纤维和单丝纤维,改善效果很明显,这对改善UTW路面应力状况非常有利;网状聚丙烯纤维混凝土在0 65～0 90应力水平范围内,疲劳寿命增长均很明显,而且相对比较稳定,说明网状聚丙烯纤维的增韧作用更加明显,适宜于UTW路面使用。Indoor experiments of strength and fatigue performance are conducted to compare three types of fiber reinforced concretes with ordinary cement concrete.Some results are brought forward.Flexural tensile strength of concrete is evidently improved by the steel fiber and the mesh polypropylene fiber.Mixing three types fibers into the concrete can increase the flexibility of the concrete,especially two types of polypropylene fibers,mesh and monofilament.It is of great benefit to improve the stress condition of UTW.The fatigue life of the mesh polypropylene fiber reinforced concrete increase evidently and steadily within the range of stress ratio between 0.65 and 0.90.This indicates that the mesh polypropylene fiber have more effects on increasing the flexibility of the concrete,and can be used to UTW pavement.

关 键 词：超薄水泥混凝土 纤维增强混凝土 强度性能 柔韧性 疲劳性能 

分 类 号：U414.18[交通运输工程—道路与铁道工程]