HOW TO FIND NORMAL CONSISTENCY OF CEMENT

08:27 Engineers engine 9 Comments

NORMAL CONSISTENCY OF CEMENT
Normal consistency test is used to determine the optimum percentage of water content required for a cement paste. It is a datum for all the tests on cement. Today I am giving he test procedure for normal consistency of a cement paste.
The standard consistency or normal consistency of a cement paste is defined as the amount of water (in percentage by weight of dry cement) that permits the vicat plunger to penetrate to a depth of 5 to 7 mm from the bottom of the vicat mould. Here is the test procedure.
Aim: To determine the normal consistency of given cement sample.
Reference: IS: 269 – 1976 and IS: 4031 – 1968
Apparatus:
1.    Vicat apparatus (confirming to IS: 5513 – 1968) with plunger (10 mm diameter).
2.    Vicat mould
3.    Gauging trowel
4.    Measuring jar
5.    Balance
6.    Tray


Procedure:
1.    Take 400 g of cement and prepare a paste with about 28% (by weight of cement) water by taking care that the gauging time is from 3 to 5 minutes. The gauging time is counted from the instant of adding of water to dry cement until the mould is filled.
2.    Fill the vicat mould by placing it on a non-porous plate with the cement paste prepared. After completely filling the mould, smooth off the surface with a single movement of the trowel, making it level with the top of the mould.
3.    Shake the mould slightly to remove any air bubbles as their presence may affect the penetration of the plunger.
4.    Place the specimen along with the non-porous plate under the vicat plunger and lower it gently so that it just touches the surface of the specimen.
5.    Quickly release the plunger and allow it to sink. Note the reading.

Prepare the paste with varying percentages of water and repeat the experiment until the plunger stops penetrating at a level 5 to 7 mm from bottom and tabulate the results.

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9 comments :

  1. Unknown11 November 2016 at 12:26

    consistency determination apparatus-Our consistency determination apparatus is ideal for quick determination of pulp/stock consistency. The measured stock is poured on to the grid plate of the instrumentality and drained underneath suction. The filtration is perennial till the filtrade becomes absolutely clear. when drying and deliberation of the sheet the consistency is decided by our consistency determination apparatus

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  2. Atio Export29 June 2018 at 10:47

    Nice Blog !! I was looking for blogs related of Concrete Testing Equipment Exporter. Then i found this blog, this is really nice and interested to read. Thanks to author for sharing this type of information.

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  3. Unknown9 December 2018 at 17:06

    good explianing.

    ReplyDelete
  4. Angel26 February 2019 at 15:17

    This is amazing information. Do you know how does this track the Limits To ready mix concrete?

    ReplyDelete
  5. construction test27 July 2019 at 15:06

    Very good explanation sir, To learn all construction material test procedures like cement, soil, bitumen, roadwork, highway etc. go to https://www.constructiontest.org

    ReplyDelete
  6. construction test27 July 2019 at 15:08

    This comment has been removed by the author.

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  7. construction test27 July 2019 at 15:09

    Try once this website https://www.constructiontest.org you are really going to like it.

    ReplyDelete
  8. Unknown27 August 2019 at 17:13

    If 1500 gm of water is required to have a cement paste 1875 gm of normal consistency the percentage of water would be?
    Answer expected

    ReplyDelete
  9. Unknown6 October 2019 at 09:31

    easy to be understood

    ReplyDelete

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