all about Specific Gravity Test of Bitumen

Specific Gravity Test of Bitumen | Procedure of Specific Gravity Test of Bitumen | Result of Specific Gravity Test of Bitumen

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all about Specific Gravity Test of Bitumen

Specific Gravity Test of Bitumen

Specific Gravity Test of Bitumen

By the specific gravity test on bitumen, we are determining the bitumen specific gravity which is one of the important properties of bitumen.

This specific gravity of bitumen test helps in understanding the sp gravity of bitumen.

Used for pavement construction is the classification of bitumen binders that can therefore be used.

The source of the bitumen binder can also help in identifying. In the bitumen specimen, the presence of the mineral impurities can also help in pointing out.

If the mineral impurities quantity is more, then the value of specific gravity will increase.

From the bitumen binder during the extraction of impurities, it is very important.

Instead of weight sometimes the volume of bitumen is specified, Presenting asphalt concrete mix design.

Also Read: Difference Between Bitumen and Tar | What Is Bitumen | What Is Tar

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Apparatus OF Specific Gravity Test of Bitumen

Apparatus OF Specific Gravity Test of Bitumen

For specific gravity tests of bitumen following are the instruments and apparatus used-

1. Specific Gravity Bottles

Specific Gravity Bottles

In this test, the bottles are used that are called wide-mouthed capillary type-specific gravity bottles.

Whose neck diameter is 6 mm, that is called Ordinary capillary type-specific gravity bottles.

In this ordinary capillary type-specific gravity bottle the materials are used that remain absolute fluid at 25 °C temperature.

Whose neck diameter is 25 mm, which is called a wide-mouthed capillary type-specific gravity bottle.

In this ordinary capillary type-specific gravity bottle, the materials are used that remain highly viscous or semi-solid at 25 °C temperature.

Also Read: What Is Unit Weight | What Is Density | What Is Unit Weight Material | Unit Weight Building Materials

2. Stopper

Stopper

The stopper is centrally located concerning the vertical axis. Its diameter is varying 1-2 mm.

It is plain and smooth at the top and the lower surface is kept concave to escape from the bore to allow the air.

At the center, the height of the concave surface is varying 4.0-6.0 mm.

3. Constant Temperature Bath

Constant Temperature Bath

With 0.2 °C accuracies, the constant temperature bath should be maintained at the given temperature.

That of pycnometer bottles, the depth should be greater than.

4. Bath Thermometer

Bath Thermometer

For the measure of the temperature of water in the ductility apparatus bath thermometer is used.

The range must be between 0 to 44 °C. The least count should be 0.1 °C

5. Other Apparatus

Other Apparatus

And the Other Apparatus That’s Being Used Is Below:

  • Electronic balance
  • Heating oven

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Procedure of Specific Gravity Test of Bitumen

Procedure of Specific Gravity Test of Bitumen

  • At first, when conducting the specific gravity test for bitumen, clean the specific gravity bottles and weigh them along with the stopper after they are dried. Note down this weight reading as And then one of the bottles was filled with distilled water and put on the stopper. Before filling the water should be cleanly boiled and cooled.
  • After that minimum at 27 ± 0.1 °C and for at least 30 minutes in a beaker of distilled water up to its neck place the bottle on submerged. or at which any other temperature specific gravity is to be determined and can be maintained.
  • With a dry cloth on the outside of the bottle clean the surplus moisture after Remove the bottles from the water bath. Again, measure the weight reading of the bottle. Note down this weight reading as After taking the weight reading the bottle should be dry again.
  • By the application of heat carefully bring the bitumen specimen to a fluid state so that the material does not evaporate. After the step slightly warm the specific gravity bottle. Until half, into the dry and clean specific gravity bottle, pour the bituminous sample. Ensure that with the sides of the bottle the material does not come in contact.
  • With the neck of the bottle, A small funnel can be used for pouring the materials which prevent the material from coming in contact. If there have any air bubbles the partly filled bottle to stand at 60-70 temperature so that the entrapped can escape.
  • Up to the specified temperature allow the bottle to cool and weigh it. Note down this weight reading as Fill the bottle with freshly boiled distilled water that containing asphalt and loosely place the stopper. We should care that how to we can prevent air bubbles in the bottle.
  • We need to attach the stopper firmly for at least 30 minutes and place the specific gravity bottle in the water bath. With a dry cloth on the outside of the bottle clean the surplus moisture after Remove the bottles from the water bath. At last measure, the weight reading of the bottle again and note down this weight reading as

Also Read: Grey Water vs Black Water | What Is Grey Water | What Is Black Water

Result of Specific Gravity Test of Bitumen

Using the specific gravity of bitumen formula, the specific gravity of the specimen is recorded as the ratio of the mass of an equal volume of distilled water to the mass of the specimen.

Within the range, the specific gravity of bitumen falls – 0.97 to 1.02 at 27 °C.

By Bureau of Indian Standard, the minimum specific gravity values standardized for Paving Bitumen at 27 °C for different grades that are given below:

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Grade of Bitumen
Specific Gravity
A – 25 0.99
A – 35 0.99
A – 45 0.99
A – 65 0.99
S – 35 0.99
S – 65 0.99
A – 90 0.98
S – 90 0.98
A – 200 0.97
S – 200 0.97

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Conclusion of Specific Gravity Test of Bitumen

By understanding the specific gravity of asphalt and specific gravity of tar, and by performing the specific gravity test, we can determine if the given bitumen sample meets the specification requirements as given in the specific gravity of bitumen is code.

By the compared to the standard value the specific gravity found out of the practical and thus the specific gravity criteria can be concluded whether the sample meets for the given grade of bitumen.

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Specific Gravity Test of Bitumen

A specific gravity test measures how much lighter or heavier bitumen is compared with the same volume of water. There are two methods to calculate the specific gravity of bitumen, the Pycnometer method and the Balance method. The specific gravity of pure bitumen is in the range of 0.97 to 1.02.

Certainteed Modified Bitumen

CertainTeed Flintlastic® SA roofing membrane is a premium, self-adhering SBS modified bitumen roofing material suitable for use in accordance with CertainTeed specifications for most low-slope roof system applications.

Modified Bitumen

Modified bitumen is thought of as the evolutionary cousin of the built-up roofing systems (BUR) that have been used on low-slope roofs for more than 100 years. It is made of asphalt combined with polymerized rubber or plastic, then reinforced with fiberglass to create a rugged-yet-flexible waterproof membrane.

Modified Bitumen Roofs

Modified bitumen roofs, also known as modified bitumen roofing systems or simply “mod bit” roofs, are a type of asphalt-based roofing material commonly used for low-slope or flat roofs. They are a popular choice for commercial and industrial buildings, as well as some residential applications.

Penetration Test for Asphalt

It’s basic principle, and the basic principle of the penetration test, was to determine the depth to which a truncated No. 2 sewing needle penetrated an asphalt sample under specified conditions of load, time and temperature. In 1915, ASTM even went as far as specifying the brand of needle (R.J.)

Penetration Test of Bitumen

The penetration test of bitumen measures its consistency and hardness. It involves penetrating a needle into softened bitumen under specific conditions, and the depth of penetration is recorded. This value helps classify bitumen grades for various applications.

Pycnometer Specific Gravity

The pycnometer (from the Greek puknos, meaning “density”, also called pyknometer or specific gravity bottle), is a flask with a close-fitting ground glass stopper with a fine hole through it, so that a given volume can be accurately obtained.

Storage Stability Test for Bitumen

The storage stability of rubber-modified bitumen is a measure of the miscibility of the rubber particles and the bitumen matrix, and a minimum of storage sta- bility is compulsory to ensure a homogeneous dis- persion after the required long transportation times at high temperatures.

Medical Apparatus

A medical device can be any instrument, apparatus, implement, machine, appliance, implant, reagent for in vitro use, software, material or other similar or related article, intended by the manufacturer to be used, alone or in combination for a medical purpose.

Fire Fighting Apparatus

A firefighting apparatus describes any vehicle that has been customized for use during firefighting operations. These vehicles are highly customized depending on their needs and the duty they will be performing.

Specific Gravity Bottles

Specific gravity bottles are used to find the liquid densities. Measuring the liquid’s density. It is executed by finding the difference between emptied bottle and a filled bottle. The difference is divided by an equal volume of water thus arriving at the specific gravity of the substance.

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