Oxidized Bitumen 95-25

Oxidized Bitumen 95/25 is based on petroleum bitumen which made by BLOWING Bitumen 60-70 by so hot air. This process gives the bitumen more rubbery properties than its original formula. So they are simply harder bitumen. oxidized bitumen under controlled temperature conditions is widely used as an anti-slip layer compound in the piling industry, for manufacture of roofing felts, the roofing and waterproofing industries, for sound dampening felts also under carriage sealant in the automotive industry, electric cable joint protection, joint filling compound, sealant compound. Also used in sealing saw cuts and joints where expected movements are minimum. In addition it used in manufacturing of bituminous marine mastic for oil & gas pipeline joints.


Application of Oxidized Bitumen 95/25:

Technical Advantages of Oxidized Bitumen 95/25

• Durability
• Flexibility
• Water Resistant
• Chemical Stability

Compared to paving grade bitumen:

• Reduced temperature susceptibility
• Exhibits a more ‘solid’ nature at ambient temperatures
• High penetration index

Handling / Storage:

Heating of packaged bitumen is a critical phase in most of the final uses. Typically, the packaged material is heated and melted in boilers out on site.
However, control at the heating phase is very important in terms of health and safety as well as in maintaining the quality of the product.

Note must be taken of the maximum safe handling temperature of 230 C and this should not be abused. Bitumen is a poor conductor of heat, consequently, control of the heating phase is of paramount importance.

The Oxidized Bitumen material should be broken up prior to placement in the boiler. This exposes a larger surface area to the heat and encourages a more even heating regime.
Without the larger exposed surface area, aggressive heating at the base and sides of the boiler may well result in localized overheating, altering the characteristics of the Chemical Mine World modified bitumen and potentially causing thermal cracking of the bitumen, creating the release of low lash vapors.
The flash point of the oxidized bitumen then becomes irrelevant; as these low flash vapors determine the fire risk.
Melted bitumen should not be left in the boiler and reheated from cold, as there is then a high potential for localized overheating around the heating area (lack of convection means poor heat transfer) and potential development of a pressurized pocket of low flash vapors.
Be aware of the placement of any temperature monitoring or control devices. As a result of the poor thermal conductivity of the bitumen, a thermometer in the bitumen some distance from the heat source could read significantly different (even hundreds of degrees) from the true temperature of the bitumen near the heat source.
For Health and Safety information, please make reference to the relevant MSDS.


Health & Safety:
Workers should wear protective masks, gloves, and goggles during application. The asphalt can be removed from equipment and tools with kerosene or gasoline. Care should be taken when heating Oxidized Bitumen 95/25 to avoid over heating

Packing of blown asphalt 95/25:

The Chemical Mine World is manufacturer of blown asphalt 95/25 in various packing including kraft bag, meltable plastic bag, drum and bulk blown asphalt 95/25 from penetration grade bitumen, which is blown by hot air in a controlled process until the desired specification is reached.
The Chemical Mine World oxidised bitumen 95/25 can be supplied in any grade and are designated by two numbers to indicate the softening point and penetration ranges.
The oxidized asphalt grade 95/25 means softening point is 95°c and penetration is 25 desimillimiter is produced in compliance and conformity to ASTM standard and meets the following specification.



Data Sheet of Oxidized Bitumen 95/25:

Bitumen 95/25	Test method	Unit	Specification
Specific gravity @25/25 C	ASTM D70	(Kg/m3)	1.05 approx.
Penetration @ 25°c	ASTM D5	mm/10	20/30
Softening point °c	ASTM D36	°C	90/100
Loss on heating(wt) %	ASTM D6	Wt. %	0.2 max
Flashpoint °c	ASTM D92	°C	250 min
Solubility is CS2(wt) %	ASTM D4	Wt. %	99.5 max
Ductility@25 C	ASTM D113	—	1.5 min

VG40 bitumen is used in areas in which high pressure comes from heavy traffic loads, such as intersections, near tolls booths, and truck parking lots.

Due to the high viscosity of this bitumen, it is more appropriate for improving resistance to shoving and other problems associated with higher temperatures and heavy traffic loads.

It is suitable for a temperature above 40°C,
Its absolute viscosity is 3200,
It is a preferred type of bitumen when heavy traffic load is expected.

Viscosity Grade Bitumen Specifications Table

CHARACTERISTICS		VG-10	VG-20	VG-30	VG-40
Absolute Viscosity 60°C, Poises, min		800	1600	2400	3200
Kinematic Viscosity, 135°C, CST, min		250	300	350	400
Flash point, C, min		220	220	220	220
Solubility in trichloroethylene, %, min		99	99	99	99
Penetration at 25°C		80-100	60	50-70	40-60
Softening point, C, min		40	45	47	25
Viscosity ratio at 60°C, max		4	40	4	4
Ductility at 25°C, cm, min, after thin film over test		75	50	40	25

What is Blown Asphalt ?
Air-blowing: The manufacturing process used to make oxidized roofing asphalts in which air is blown through an asphalt flux. An exothermic oxidation reaction occurs, yielding asphalt that is harder, more viscous, less volatile, and less temperature-susceptible than the asphalt flux used as the feed stock to the process.
Asphalt, oxidized (blown or air-refined): Asphalt treated by blowing air through it at elevated temperatures to produce physical properties required for the industrial use of the final product.

 

Blown Asphalt Explain: 
Special properties may be imported to asphalt by blowing air through the topped crude fraction during the latter part of the refining process. The regular distillation process is discontinued at some point while the topped crude is still liquid. The heavy fraction is then put into a converter and air is blown through it while it is maintained at a high temperature. This process is continued until the asphalt has attained desired properties. Often, such asphalts are called oxidized asphalts. However, this is not strictly a true term because not only oxidation but also vaporization, Dehydrogenation, condensation, polymerization and other reactions occur during the air blowing process.

Blown Asphalt Uses:
Blown Asphalts are used for a wide variety of industrial and specialty purposes. Just a few of these are: a variety of roofing applications, pipe coating enamels, underselling asphalts to sill cavities beneath Portland cement concrete pavements, and waterproof membranes for lining canals and reservoirs. In many instances blown asphalts are applied in pure form. In other cases, very fine mineral powders (fillers) are mixed with blown asphalt prior to application. Only rarely, if ever, are blown asphalts used in asphalt-aggregate mixtures for paving purposes.