【摘 要】
：
This paper focused on the design and evaluation of an asphalt mixture with low thermal conductivity.Based on a designed SMA13 asphalt mixture,vermiculite po
【机 构】
：
SoutheastUniversity,2Sipailou,Nanjing,210096,China
【出 处】
：
2016年交通基础设施和材料国际会议
论文部分内容阅读
This paper focused on the design and evaluation of an asphalt mixture with low thermal conductivity.Based on a designed SMA13 asphalt mixture,vermiculite powder was used to replace part of the fine aggregates to get an asphalt mixture with lower thermal conductivity.The Marshall test,wheel tracking test,low temperature bending beam test,and freeze-thaw splitting test were conducted to obtain a full evaluation of asphalt mixtures with different contents of vermiculite powder.A Mathis TCI thermal analyzer was used to test the thermal conductivity of asphalt mixtures,and the T-monitor temperature measuring system was used to compare the inside temperature of asphalt mixtures with and without vermiculite powder.It was found that with 10%vermiculite powder in the asphalt mixture,all of the road performances were satisfied,while thermal conductivity was lowered by 40%,and the inside temperature of the asphalt mixture was lowered by up to 2℃.The findings in this paper proved the feasibility of using vermiculite powder to reduce the thermal conductivity of asphalt mixtures.
其他文献
In this paper,pavement performance index PCI,road surface deflection and pavement rutting are proposed as the design indexes of pavement structure by analyz
The backfill above a high embankment culvert is over 10 m,which leads very large earth pressure on the crown of the culvert.The imperfect trench covered wit
It was well known that rutting is one of the most common types of pavement distress for asphalt pavement under heavy vehicle loading in hot climate.In this
In order to reduce subgrade permanent deformation,it is significantly important to keep the subgrade behaving elastically.However,the subgrade workaround de
A composite foundation in the current study is improved by the joint usage of two types of columns.The soil is modeled as a Mohr-Coulomb material,and the st
The main technical requirements of road concrete are high flexural strength and fatigue durability because shear failure is the major failure mode for road
In order to study the change laws of dynamic modulus with different framework types under different frequencies and temperatures and obtain the dynamic modu
This paper developed a computational model based on oblique prestressed concrete design methods,theoretical calculation method estimates take different angl
This study aims to characterize the mechanism and performance of different crumb rubber modified asphalt including the desulfurized crumb rubber asphalt and
Gap Graded Asphalt(GGA)is a new type of asphalt mix developed by OPUS International.It has been successfully experimented on several trial sites along the M