摘要
基于沥青混合料是由沥青砂浆、粗集料和空隙组成的设计理念,为测定沥青砂浆掺加量对混合料的性能影响,通过PCG旋转压实法测定粗集料的骨架间隙率,采用次集料逐级填充测定骨架间隙率,得出I级、II级、III级、IV级最小骨架间隙率,按最小骨架间隙率的85%、95%、100%和110%分别填充沥青砂浆,测定其高、低温性能,疲劳性能和动态模量。试验结果发现,随着沥青砂浆填充率的增加,混合料动稳定度呈降低趋势;混合料的最大弯拉应变呈增大趋势;混合料的抗疲劳性能逐渐增强;在相同的试验温度和加载频率下,动态模量呈增大趋势。填充率与混合料的动稳定度呈现负相关;填充率与混合料最大弯拉应变呈现正相关性。该种设计方法与路用性能直接关联,具有实际的应用价值。
Based on asphalt mixture is composed of asphalt mortar and coarse aggregate and space design concept,for the determination of amount of asphalt mortar mixed with influence on the performance of the mixture,by rotating the compaction PCG method of coarse aggregate skeleton clearance rate,the determination of second stage filling aggregate skeleton clearance rate,it is concluded that the I,II,III,IV skeleton minimum clearance rate,according to the minimum skeleton clearance rate of 85%,95%,100%and 110%respectively filled with asphalt mortar,the determination of the high and low temperature performance,fatigue performance and dynamic modulus.The test results show that the dynamic stability of the mixture decreases with the increase of the filling rate of asphalt mortar.The maximum bending strain of the mixture is increasing.The fatigue resistance of the mixture is gradually enhanced.Under the same test temperature and loading frequency,the dynamic modulus increases.The filling rate is negatively correlated with the dynamic stability of the mixture;the filling rate is positively correlated with the maximum bending strain of the mixture.The design method is directly related to road performance and has practical application value.
作者
王新强
王国清
王庆凯
高占华
WANG Xin-qiang;WANG Guo-qing;WANG Qing-kai;GAO Zhan-hua(School of Civil and Transportation,Hebei University of Technology,Tianjin 300401,China;Hebei Shiqing Expressway Company Limited, Shijiazhuang 050051,China;Hebei Province Road Structure and Material Technology Research Center,Shijiazhuang 050091,China;Hebei Provincial Communications Planning and Design Institute,Shijiazhuang 050091,China)
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2018年第9期2985-2990,共6页
Bulletin of the Chinese Ceramic Society
基金
河北省科技计划项目(16211247)
