基于断裂能纤维增强乳化沥青碎石封层抗裂性能研究  

A Study on Crack Resistance Performance of Fiber-Reinforced Emulsion Asphalt Crushed Stone Seal Based on Fracture Energy

作　　者：刘燕燕[1] 凌天清[1] 蒋科[2] 

机构地区：[1]重庆交通大学,重庆市400074 [2]招商局重庆交通科研设计院有限公司,重庆市400067

出　　处：《公路》2012年第8期201-207,共7页Highway

摘　　要：通过测定乳化沥青与4种不同纤维(A-玄武岩纤维,B-无碱玻纤,C-高强玻纤,D-表面处理玻纤),在破乳前后以及不同温度下的接触角,由Young方程得出该乳化沥青与4种不同纤维的黏附功;试验发现,随着温度升高,沥青与纤维黏附功逐渐降低,黏附功大小依次是D>B>A>C,在封层中选择D更合适。分析正交试验3因数4水平下,各试验方案的最大弯曲力、最大挠度、断裂能。试验结果表明:沥青含量是影响最大弯曲力和断裂能最主要因素,其次是纤维用量,最后是纤维长度;从能量角度来看,纤维增强乳化沥青碎石封层的最佳组合方案为沥青用量1.2kg/m2、纤维用量160g/m2、纤维长度12cm。对比分析表明,加入玻璃纤维后乳化沥青碎石封层的最大弯曲力增加53%、最大挠度增加了98.7%、断裂能增加159.1%,裂缝发展到1cm,3cm,5cm时,断裂时间分别延长了37.5s,37.4s,269s。Measured the contact angle between emulsion asphalt and four kinds different fiber （A--ba- salt fiber, B--E-glass, C--High-strength fiber, D--surface treatment fiber）in different temperatures , ac- cording to the Young Equation arrived at the adhesion work between emulsion asphalt and four kinds dif- ferent fiber; from the test the adhesion of emulsion asphalt and fiber decreasing with temperature increas- ing, the adhesion followed by D〉B〉A〉C, selecting the D fiber is more appropriate. Orthogonal test a- nalysis under 3 factors 4 levels, measured each group, the maximum bending force, maximum deflection, the fracture energy. The results show that： asphalt content is the most important factor impact on bending strength and fracture energy, followed by the amount of fiber, finally the fiber length. From the energy point derive of the optimum combination scheme for the asphalt content is 1.2 kg/m2 , fiber content is 160 g/m2 , fiber length is 12 cm. Comparative analysis shows that, after adding the glass fiber in fiber-re- inforced emulsion asphalt crushed stone seal the maximum bending force increased by 53 %, the maximum deflection increased by 98.7%, fracture energy increased by 159.1%, crack developed to 1 cm, 3 cm, 5 cm, the time is extended 37. 5 s, 37.4 s, 269 s respectively.

关 键 词：道路工程 封层 断裂能 正交分析 

分 类 号：U416.217[交通运输工程—道路与铁道工程]