Research on performance of polymer modified asphalt

The low temperature force-ductility performances of SBS,SBR,EVA,PE polymer modified asphalts were studied by force-ductility tests.

Introduced in this article are the unconventional methods of testing the polymer modified asphalt which is widely used in current China.

Self-adhered polymer modified bitumen waterproofing membrane and its standard;

Thy results of conventional tests (penetration, softening point, kinematical viscosity and Fraass breaking point) and those of dynamic mechanical analysis (DMA) on Styrene Butadiene Styrene (SBS) polymer modified bitumen are systematically compared.

Reason analysis on water-destroy on asphalt pavement of expressway;

Gradation distribution and quality control of aggregate in asphalt pavement

Due to the problems which exist while measuring density of asphalt pavement using traditional meth- ods,such as time consuming and laborious,instability of the accuracy and reliability of test result,the method of using pavement quality indicator for measurement is presented,and the principle and test scope are described.

Temporary treatment on the bridge expansion joint during asphalt surface course construction;

Stress s numerical analysis of asphalt surface in porous concrete base s transverse contraction joint;

Aiming at the reflective cracks problem existing in the adding asphalt surface on the original cement concrete pavement in the road reform process,it introduces formation origins of the reflective cracks easily,and brings forward some prevention and cure suggestions on this foundation to those cracks on the asphalt surface.

From the requirement of action and quality of bituminous surface,combined with Shanxi characteristics,the structure of traditional AC,AK(SAC),SMA surface is analysed by contrast.

A new design method based on voidage of coarse aggregates for grading of permeable bituminous surface course is presented in this paper.