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How to Calculate the Specific Gravity of Cement with respect to IS code?

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Asked: May 21, 20202020-05-21T11:28:16-07:00 2020-05-21T11:28:16-07:00In: Concrete
deepana
deepana

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How to Calculate the Specific Gravity of Cement with respect to IS code?

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  1. Komal Bhandakkar

    Komal Bhandakkar

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    Komal Bhandakkar AUTHOR
    2020-09-13T21:19:23-07:00Added an answer on September 13, 2020 at 9:19 pm
    How to Calculate the Specific Gravity of Cement with respect to IS code?

     The specific gravity of cement:

    Definition :

    The ratio of the weight of a given volume of cement to the weight of an equal volume of water is called specific gravity of cement.

    IS Code of specific gravity test is IS 2720 part 3


    Apparatus required :

    • Le-Chatelier flask
    • Weighing balance of 0.1 Gram accuracy

    Sample materials required :

    • Cement
    • Kerosene

    Important key points :

    1. The specific gravity of kerosene is 0.79 gram per centimetre cube
    2. The specific gravity of water is 1 gram per centimetre cube

    Interesting point :

    The reason behind kerosene is used to find out the specific gravity of cement and not the water is given below;

    • In general, to calculate the specific gravity of the material, we use water.
    • In the case of cement, we use kerosene for finding specific gravity of it.
    • Cement hydrates and forms calcium oxide when it reacts with water
    • Cement won’t show any type of reaction when it mixed with kerosene. Hence kerosene is used to find the specific gravity of cement instead of water.

    I hope you learn some new concepts from my answer. Thank you.

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  2. AdityaBhandakkar

    AdityaBhandakkar

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    AdityaBhandakkar User
    2020-08-12T23:30:58-07:00Added an answer on August 12, 2020 at 11:30 pm

    I added an important formula used to calculate specific gravity of cement.

    The specific gravity of cement= ( weight of a given volume of material/weight of an equal volume of water )

    Or

    Specific gravity of cement = ( W2 – W1) / (W2 – W1) – (W3 – W4) x 0.79

    Specific gravity of kerosene= 0.79g/cc

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  3. Raghvendra_Rai

    Raghvendra_Rai

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    Raghvendra_Rai Expert
    2020-05-21T23:02:48-07:00Added an answer on May 21, 2020 at 11:02 pm

    IS 4031(part 11): 1988 specifies the following test procedure to be adopted for the Determination of Specific Gravity of Cement and the test should be done at room temperature.

    Apparatus:

    • Standard Le – Chatelier Flask
    • Analytical balance of accuracy +/-0.0002g
    • Constant temperature water bath
    • Cement
    • Kerosene

    Procedure:

    • Kerosene is taken in the Le-Chateliers Flask, such that the level is in between the ‘0’ &  ‘1’ (V1) mark.
    • 64 g (W) cement is then added to the flask using a funnel. Care to be taken so that cement particles did not stick to the walls of the flask.
    • The neck should be sealed with the glass lid or cork and rotated in all axis in order to ensure all the air bubbles are removed, after adding cement.
    • The flask is then placed in room temperature inside a water bath for 24 hours.
    • The final reading of the level in the flask (V2) mark is then noted after the 24 hour period.
    • Then specific gravity of cement can be calculated using following equation.
    • Density = Mass of cement(gm)/Displaced volume (cm3)
    • Density = W/(V2-V1)

      It is based on the fact the change in volume observed is equal to the volume of cement and we already know the weight so Density/ Specific Gravity can be calculated and Kerosene is used here because it is a non-polar liquid.

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  4. Fasi Ur Rahman

    Fasi Ur Rahman

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    Fasi Ur Rahman
    2020-05-21T23:13:19-07:00Added an answer on May 21, 2020 at 11:13 pm

    The specific gravity is normally defined as the ratio between the weight of a given volume of material and the weight of an equal volume of water.

    The determination of Specific Gravity of Cement as per IS Codes with the use of Standard Le – Chatelier Flask.

    The detailed procedure for the determination of specific gravity of cement and its importance is explained in the article below-

    Determination of Specific Gravity of Cement and Its Importance

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