沥青混合料的搅拌功率试验和黏度模型  

Mixing power test and viscosity model of asphalt mixture

作　　者：刘聂玚子[1] 荣鑫 刘洪海[2] 边庆华 兰海 LIU Nie-yang-zi;RONG Xin;LIU Hong-hai;BIAN Qing-hua;LAN Hai(School of Transportation Engineering,Chang'an University,Xi'an 710064,China;Key Laboratory of Road Construction Technology and Equipment,Ministry of Education,Chang'an University,Xi'an 710064,China;Research and Development Center of Highway Construction and Maintenance Technology,Materials and Equipment,Transportation Industry,Gansu Road and Bridge Construction Group Co.,Ltd.,Lanzhou 730030,China)

机构地区：[1]长安大学运输工程学院,西安710064 [2]长安大学道路施工技术与装备教育部重点实验室,西安710064 [3]甘肃路桥建设集团有限公司公路建设与养护技术材料及装备交通运输行业研发中心,兰州730030

出　　处：《吉林大学学报（工学版）》2023年第1期220-225,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51878062);甘肃省交通运输厅科技项目(2019-12).

摘　　要：针对由沥青“黏度-温度”试验曲线确定的混合料理论施工温度与工程实际施工温度差距较大问题,通过进行沥青混合料的搅拌功率试验,对其施工温度确定方法进行了理论和试验研究。采用经过改制的搅拌机,测定不同温度与搅拌转速下的混合料搅拌功率,得到三者之间的关系,进而建立了由搅拌功率表征的沥青混合料广义塑性黏度模型。该模型表明:沥青混合料的广义塑性黏度决定于混合料的温度,以及矿料物理性质、级配、沥青类型和用量等材料因素,而与搅拌机的转速无关,代表了沥青混合料的流变特性;通过测定沥青混合料在不同温度下的广义塑性黏度,得到广义塑性黏度随温度的变化曲线,在该曲线中梯度变化明显变缓的温度可作为该种沥青混合料的施工控制温度。In view of the large gap between the theoretical construction temperature of mixture determined by asphalt viscosity-temperature test curve and the actual construction temperature of mixture,theoretical analysis and experimental research were carried out on construction temperature determination method based on the mixing power test of asphalt mixture. Through a modified mixer,measuring the mixing power of the mixture at different temperatures and stirring speeds,the relationship between the three could be obtained and the viscosity model of the asphalt mixture based on the mixing power was established. The model shows that:the generalized plastic viscosity of the asphalt mixture depends on the temperature of the mixture,physical properties of the aggregate,gradation,type and amount of asphalt and other material factors,and has nothing to do with the mixer rotating speeds,which represents the rheological properties of the asphalt mixture. By measuring the generalized plastic viscosity of the asphalt mixture at different temperatures,a curve of the generalized plastic viscosity with temperature is obtained. The temperature at which the gradient of the curve change slows down significantly can be used as the construction control temperature of the asphalt mixture.

关 键 词：道路工程 沥青混合料 黏度模型 搅拌功率 施工温度 

分 类 号：U414[交通运输工程—道路与铁道工程]