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praveen pandey
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Asked: 2024-01-06T22:27:03+05:30 In:

How to check concrete slump?

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    4 Answers

    1. Vipin Chauhan
      Professional

      Checking the slump of concrete is important to ensure that the concrete mix has the right consistency and workability for the intended construction application. The slump test is a widely used method for measuring the consistency of freshly mixed concrete. Here's how you can perform a slump test: EqRead more

      Checking the slump of concrete is important to ensure that the concrete mix has the right consistency and workability for the intended construction application. The slump test is a widely used method for measuring the consistency of freshly mixed concrete. Here’s how you can perform a slump test:

      Equipment needed:

      1. Slump cone: A truncated cone-shaped container made of metal or plastic.
      2. Tamping rod: A round, straight steel rod with a diameter of 5/8 inch (16 mm) and a length of about 24 inches (600 mm).
      3. Tamping rod stand: A stable base for supporting the slump cone during the test.
      4. Measuring tape: To measure the slump of the concrete.

      Procedure:

      1. Prepare the Slump Cone:
        • Wet the inside surface of the slump cone to prevent the concrete from sticking.
        • Place the slump cone on a smooth, flat surface.
      2. Fill the Slump Cone:
        • Fill the cone with freshly mixed concrete in three equal layers.
        • Each layer should be tamped with the steel rod 25 times, penetrating into the layer below.
      3. Strike Off Excess Concrete:
        • After the final layer is tamped, strike off the excess concrete level with the top of the cone using the tamping rod.
      4. Lift the Slump Cone:
        • Lift the slump cone vertically and without any twisting motion, so that the concrete inside the cone slides down.
      5. Measure the Slump:
        • Measure the difference between the original height of the cone and the displaced concrete. This difference is the slump.
        • Use a measuring tape or ruler to measure the slump from the top of the cone to the highest point on the slumped concrete.
      6. Record the Slump:
        • Record the slump value in millimeters (or inches).

      Interpretation of Slump:

      • Slump values can vary based on the concrete mix design and the requirements of the construction project.
      • Higher slump values indicate a more workable and fluid mix, while lower slump values suggest a stiffer mix.

      Important Tips:

      • The slump test should be performed quickly to prevent changes in the concrete’s workability.
      • Always clean the equipment thoroughly between tests.
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    2. Shree
      Beginner

      to check concrete slump: 1. Fill a slump cone with concrete in 3 layers 2. Rod each layer 25 times 3. Level the top, then lift the cone straight up 4. Measure the difference between the cone's height and the slumped concrete 5. This difference is the slump measurement This quick test helps assess coRead more

      to check concrete slump:

      1. Fill a slump cone with concrete in 3 layers

      2. Rod each layer 25 times

      3. Level the top, then lift the cone straight up

      4. Measure the difference between the cone’s height and the slumped concrete

      5. This difference is the slump measurement

      This quick test helps assess concrete consistency on-site.

      See less
    3. SG Tamilan
      Beginner

      To check the concrete slump, perform a simple test using a slump cone. Place the cone on a flat, non-absorbent surface and fill it with freshly mixed concrete in three layers, each compacted with a rod. Once filled, level off the top, and carefully remove the cone. Measure the difference between theRead more

      To check the concrete slump, perform a simple test using a slump cone. Place the cone on a flat, non-absorbent surface and fill it with freshly mixed concrete in three layers, each compacted with a rod. Once filled, level off the top, and carefully remove the cone. Measure the difference between the height of the cone and the highest point of the settled concrete. This difference, known as the slump, indicates the workability of the concrete, with higher slump values showing more fluidity and lower values indicating a thicker mix.

      See less
    5. Acciva Travels
      Beginner

      To check concrete slumps, follow these steps: Fresh concrete should be poured in three layers, and tamped 25 times each. Level the surface and remove any excess concrete that has accumulated. Measure the height difference between the cone and the slumped concrete by lifting the cone vertically withoRead more

      To check concrete slumps, follow these steps:

      1. Fresh concrete should be poured in three layers, and tamped 25 times each.

      2. Level the surface and remove any excess concrete that has accumulated.

      3. Measure the height difference between the cone and the slumped concrete by lifting the cone vertically without twisting.

      4. The measured difference shows the slump value, which reflects workability of concrete.

      See less

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