基于最大公称粒径的贝雷法选取密度修正值  

Chosen Density Corrected Value of Bailey Mehtod Based on NMAS

作　　者：张德文[1,2] 李俊[3] 

机构地区：[1]海南省公路勘察设计院,海南海口570206 [2]长沙理工大学交通运输工程学院,湖南长沙410114 [3]长安大学公路学院,陕西西安710064

出　　处：《交通标准化》2014年第17期129-132,135,共5页Communications Standardization

摘　　要：选取AC—20、AC—16、AC—10、AC—5等四种不同最大公称粒径沥青混合料矿料级配,根据贝雷法控制筛孔D/2通过率计算PCS通过率,进而反算不同最大公称粒径条件下粗集料选取密度修正值范围。结果表明:沥青混合料最大公称粒径与粗集料用量呈正相关的关系,而粗集料用量则影响着贝雷法控制筛孔PCS的通过率;粗集料选取密度修正值与最大公称粒径呈正比,采用贝雷法进行矿料级配设计时,应根据最大公称粒径选用合适的选取密度修正值。Four mineral aggregate gradation of asphalt mixture with different four mineral aggregate gradation are chosen as research objects in the article, which named AC-20, AC-16, AC-10 and AC-5. The passing rate of PCS is calculated according to the passing rate of control sieve pore D/2 based on Bailey method. Then the corrected value scopes of coarse aggregate＇s chosen density with different NMAS are back calculated. The study shows that： the NMAS of asphalt mixture is positively correlated with dosage of coarse aggregate, and the dosage of coarse aggregate effects the passing rate of control sieve pore PCS; the corrected value of chosen density is proportional to NMAS, and the appropriate corrected value of chosen density should be chosen when designing mineral aggregate gradation with Bailey method.

关 键 词：最大公称粒径 贝雷法 选取密度 修正值 

分 类 号：U414.02[交通运输工程—道路与铁道工程]