Asphalt leveling course has effect on providing working platform for asphalt leveling course and preventing reflection cracks in the "adding AC overlay on PCC pavement" project.

The paper introduced the importance and influenced factors of bituminous pavement smoothness,also proposed relative measures.

Geochemical characteristics of reservoir bitumen in well LH 21-1-1 and its significance in petroleum geology;

Advances and main problems in reservoir bitumen research

Oil source of marine crude oils from Tarim Basin is still disputed;However,the research on the reservoir bitumen may provide a new evidence to elucidate oil source.

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.