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1. Stubborn stains, paint or petroleum asphalt can be removed with turpentine or paint thinner.

2. Results is to compare the test error see petroleum asphalt allow enterprises quality of asphalt felt paper births article 10.

3. It is studied on the preparation of the petroleum asphalt-coal-water slurry(PACWS) by mixing two different rank coals separately with the petroleum asphalt.

4. Conclusion It is suggested that petroleum asphalt may cause damage in DNA, chromosome, large and small airways, and decrease of cellular and humoral immunity functions in exposed workers.

5. A modified asphalt adhesion agent was made using petroleum asphalt as base materialbutyl rubber as modifierrosin resin as tackifier and mica powder as filler.

6. Low surface wettability and bulk density of petroleum asphalt are effectively solved by the use of a kind of surfactant and different particles distribution in the experiment.

7. This paper points out that the development of petroleum asphalt must be conjuncted with the petroleum refining, crude oil production and utilization of petroleum asphalt at first.

8. Petroleum asphalt polyurethane waterproofing paint is a dually chemical reaction consolidated waterproofing one of high elasticity and high elongation.

9. Expound petroleum asphalt is a non-carcinogen, can Burnout special liquid fuel, it has have obvious economic benefits to alternative diesel fuel and easy managed.

10. It is investigated that the mesoporous activated carbon used as catalyst support is fabricated from carbonaceous gel derived from petroleum asphalt.

11. The quality of regenerated asphalt can reach requirement of the traffic road quality standard of petroleum asphalt(GB50092-96).

12. A moisture curable one component waterproof coatings was prepared from polyether polyols, petroleum asphalt, toluene diisocyanate, diluent and a compatibility modifier, etc.

13. Objective To study and work out hygienic standard of petroleum asphalt fume in the air of workplace.

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14. The authors have made a microelectrode with the material of petroleum asphalt fiber.

15. Methods Acute oral toxicity test, subchronic inhalation toxicity test and mutagenicity test were conducted to observe the effects of petroleum asphalt in experimental animals.

16. Said detergent is a mixed solution made up by using diesel oil as solvent, petroleum asphalt as solute and mixing them in 1-15% of concentration ratio.