Oxidized bitumen 95/25

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The bitumen products are for paving , also used in asphalts -based paints for corrosion protection of metals, in lining public works structures, adhesives in electrical laminates, base for synthetic turf; typical uses for oxidized  bitumen 95/25 used also for water-proof application and corrosion resistance for pipe coating, Portland cement pavement, hydraulic applications, paint manufacturing, caulking, mastics, and damp proofing. Oxidized bitumen 90/25 should be heated double temperature against the softening point to be able to have flow and viscosity. To use bitumen, surfaces must be dry, clean and free of loose particles, formwork, curing products, irregularities, slurry, etc.

Chemistry blowing process of bitumen 95/25

The bitumen blowing process can be described as a conversion process in which oxidation, dehydrogenation and polymerisation take place. Normally, it is effected with the oxygen present in air, and it is this type of process that is considered here. By subjecting the materials entering and leaving the reaction vessel to a combination of analytical methods, it is possible to draw up an oxygen balance. It has been found that all the oxygen taken up by the oxidized bitumen 95/25 can be accounted for by the formation of hydroxyl, carbonyl, acid and ester groups; no ether oxygen has been detected.

Temperatures of bitumen 95/25

As most bitumen grades are solid at ambient temperature, in order to enable them to be moved through the distribution system as a liquid, they must be heated to temperatures in the range of 1408c to over 2008c, depending on the grade; higher temperatures up to 2308c are applied with an inerted atmosphere for highly oxidised grades. When handled properly, can be reheated or maintained at elevated temperatures for a considerable time without adversely affecting its properties. However, mistreatment of oxidized bitumen 95/25 by overheating or by permitting the material to be exposed to conditions that promote oxidation can adversely affect the properties of the bitumen and may influence the long term performance of mixtures that contain bitumen.

Analyze of bitumen 95-25

TEST SPECIFICATION

STANDARD RANGE

TEST METHOD

Specific gravity @25/25 C

1.05 approx.

D-70

Penetration @25C

20/30

D-5

Softening point C

90/100

D-36

Ductility@25C

1.5min

D-113

Loss on heating (wt)%

0.2max

D-6

Flash point C

260min

D-92

Solubility in CS2 (wt)%

99min

D-4

Specific gravity @25/25 C

1.05 approx.

D-70

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