They included the charge orders and different doses of stabilizer and the grade of base asphalt.

Synthetic ammonia plant uses hard bitumen as feedstock,with Texaco gasification process,CO sulfur tolerant shift catalyst,Linde low temperature methanol washing and low temperature liquidized nitrogen purification as well as Topse ammonia synthesis process Urea plant takes the Italian Snam ammonia steam stripping proces

Hard bitumen has a low penenration and has better high temperature performance than soft bitumen.

Experiment study on the modulus of hard asphalt stabilized macadam

Hard asphalt A-30 is a kind of high viscosity base asphalt which characterized by low penetration,high viscosity,high stiffness,high soft point,and low ductility,it has satisfactory high- temperature stability,better temperature susceptibility,only unsatisfactory low-temperature perfor- mance.

Combined with the key technical study project of the long service life asphalt pavement of the heavy-load traffic by the Ministry of Communication and in the light of the fatigue performance of hard asphalt concrete,the article introduces the relative experiments and carries out the relative analysis to provide the referring suggestion for the anti-fatigue study of half-rigidity pavement.

Since the commissioning of the production line for hard pitch at AISCChemical General Works in Apr.

To discuss the applicability of domestic hard bitumen in bridge deck gussasphalt paving, the types of overseas common hard bitumen were analyzed, domestic hard bitumen, PmB45 made in laboratory and PmB25 made in Germany were selected, by means of indentation test, wheel track test, bending beam test and fatigue test, the performances of the gussasphalts made with the hard bitumens were evaluated.