摘要
借鉴国外LPDS剪切试验方法,通过自行设计的室内直剪试验和斜剪试验,以剪切强度和单位剪切强度（剪切强度与破坏变形的商）作为评价指标,研究了沥青混合料、粘层材料、半刚性基层材料、沥青混合料与粘层材料的界面、粘层材料与半刚性基层的界面对沥青面层和半刚性基层之间抗剪切强度的影响。分析结果表明：提高沥青混合料公称最大粒径和压实度将有利于增强层间粘结性;高强度、粗糙、密实型的半刚性材料也将有效改善基层与沥青面层的粘结性;粘度不是选择粘层材料的主要因素,应结合工程实际,通过试验选择粘层材料的品种与剂量;基层表面清理是提高层间粘结性的重要措施,透层油应在基层清理后撒布,剂量宜为0.3~0.6 L.m-2;在层间热沥青上撒布一定的单一粒径,较粗规格,且与沥青粘附性较好的碱性碎石不仅具有工程意义,对提高层间粘结水平也有较明显作用。
Referring to foreign LPDS shear test method,the influence of asphalt mixture,sticky layer material,semi-rigid base material,the interface of asphalt mixture and sticky layer material,the interface of viscous layer material and semi-rigid base on the shear strength between asphalt surface layer and semi-rigid base was studied with self-designed interior direct shear test and oblique shear test.The shear strength and the unit shear strength were the test evaluation indexes.It is shown that increasing the maximum nominal size and the compactness of asphalt mixture can improve interlayer bond strength.High strength,coarse and dense semi-rigid material can improve interlayer bond strength.Viscosity isn＇t main influence factor to select viscous layer materials,but the species and doses of viscous layer materials should be selected according to engineering practice test.Cleaning the surface of semi-rigid base is an important measure to improve bond interlayer＇s level.Prime coat should be sprinkled with 0.3~0.6 L·m-2 after the surface of semi-rigid base is cleaned.Casting single particle size,coarse specification and alkaline crushed stone above interlayer hot asphalt is easy to construct,and can improve interlayer bond strength.15 tabs,6 figs,10 refs.
出处
《交通运输工程学报》
EI
CSCD
北大核心
2010年第2期12-19,共8页
Journal of Traffic and Transportation Engineering
基金
交通运输部公路工程标准规范研究项目(11010016)
关键词
路面工程
沥青路面
半刚性基层
层间粘结性能
抗剪强度
影响因素
pavement engineering
asphalt pavement
semi-rigid base
interlayer bond performance
shear strength
influence factors
