Field test of cement

Field test of cement

Physical Tests on Cement

Cement is used widely for the construction of different types of structures. Some of them are listed below: a field test of cement

  • Cement slurry is appropriated for filling wisecracks in concrete structures. Cement mortar is utilized for masonry work, plastering, and guiding.
  • Cement concrete is utilized for the construction of different structures like buildings, bridges. water tanks, tunnels, docks, the harbor is, etc. Cement is utilized to produce lamp posts, telephone posts, railway sleepers, piles, etc.
  • For producing cement pipes, garden seats, dust boxes, flower pots, etc. cement is commonly used. It is valuable for the construction of roads, footpaths, courts for different sports, etc. field test of cement
  1. Soundness Test
  2. Setting Time
  3. Soundness Test
  4. Crushing Strength Test. field test of cement

1.Soundness Test:

  • It is conducted by sieve analysis. 100 gems of cement are practiced and sieved over IS sieve No. 9 for fifteen minutes. Residue on the sieve is weighed. This should not exceed 10 percent by the weight of the sample taken. field test of cement

2.Setting Time:

  • Initial context time and final setting time are the two major physical properties of cement. Initial setting time is the time taken by the cement from combining water to the opening of losing its plasticity. field test of cement
  • The final setting time is the time elapsed from attaching the water to the complete waste of plasticity. Vicar apparatus is used for finding the setting times. The Vicar equipment consists of a portable rod to which any one of the three needles shown in the figure can be attached. field test of cement
  • A symbol is attached to the movable rod. A vicar mold is connected with this apparatus which is in the form of a separating cylinder. field test of cement
  • Before getting the initial and final setting time it is important to determine water to be appended to get standard consistency. These 300 gems of cement are mixed with about 30% water and the cement paste prepared is filled in the mold which rests on a non-porous plate. field test of cement
  • The plunger is connected to the adjustable rod of the vicar appliance and gently reduced to touch the adhesive in the mold. Then the plunger can move freely. field test of cement
  • If the penetration is 5 mm to 7 mm from the bottom of the mold, then cement is having standard consistency. If not, the operation is reappeared with a different dimension of water fill water needed for standard density is found. Then the operations for initial and final setting times can be carried out as explained below. field test of cement

   2.1. Initial Setting Time:

  •  300 gems of cement are completely blended with 0.85 times the water for regulation consistency and vicar mold is filled and the top surface is leveled. 1 mm square spike is fixed to the rod and lightly placed over the paste. Then it is freely allowed to penetrate. field test of cement
  • In the inception, the needle understands the paste completely. As time stops the paste begins losing its plasticity and continues penetration. When the needle can understand up to 5 to 7 mm above the bottom of the paste operation is stopped and time passed between the extension of water and end if the research is noted as the initial setting time. field test of cement

  2.2. Final Setting Time.

  •  The square spike is displaced with an annular collar. The experiment is continued by allowing this needle to freely move after gently touching the surface of the paste. Time passed between the enhancement of water and the mark of the needle but not of the annular band is found on the paste. This time is remarked as the final setting time. field test of cement

3.Soundness Test:

  • This test is administered to find free lime in cement, which is non-desirable. Le Chatelet apparatus used for conducting this test. It consists of a split brass mold of diameter 30 mm and height 30 mm. On each side of the division, there are two pointers, with tart ends. The ends of the indicators are 165 mm from the center of the mold. field test of cement
  • Properly oiled Le Chatelet mold is placed on a glass plate and is filled completely with a cement paste having 0.78 times the water required for standard consistency. It is then covered with a different glass plate and a small mass is installed over it. Then the whole assembly is put underwater for 24 hours. field test of cement
  • The temperature of the water should be between 24°C and 50°C. Note the distance between the indicators. Then place the mold over in the water and warm the assembly such that water enters the boiling limit in 30 minutes. Boil the water for one hour. field test of cement
  • The mold is removed from the water and allowed to cool. The distance between the two pointers is measured. The difference between the two readings indicates the expansion of the cement due to the presence of unburnt lime. This value should not exceed 10 mm. field test of cement

4.Crushing Strength Test:

  • For this 200 gm of cement is blended with 600 gm of regular sand verifying IS 650–1966. Behind mixing completely in a dry disease for a minute purified potable water P 4 + 3 interest is added where P is the water needed for the standard agreement. They are confused with a trowel for 3 to 4 minutes to get a consistent mixture. field test of cement
  • The mix is stored in a cube mold of 70.6 mm dimension (Area 5000 mm2) stored on a steel plate and crowded with a 25 mm standard steel rod 20 times in 8 seconds. Then the mold is located on a conventional vibrating table that vibrates at a snap of 12000 ± 400 vibrations through the minute. A hopper is achieved at the top and the surviving mortar is filled. The mold is sounded for two minutes and the hopper raised. field test of cement
  • The top is perfected with a knife or with a trowel and smoothed. After 24 ± 1-hour molds are removed, and the cube is placed under clean water for curing. After specified period cubes are tested in a compression testing machine, keeping the specimen on its level edges. field test of cement
  • An average of three cubes is reported as crushing strength. The compressive energy at the aspect of 3 days should no be smaller than 11.5 N/mm2 and that at the end of 7 days not less than 17.5 N/milimeters2. field test of cement
What are the types of Physical Tests on Cement?

Cement is used widely for the construction of different types of structures. Some of them are listed below:
Cement slurry is appropriated for filling wisecracks in concrete structures. Cement mortar is utilized for masonry work, plastering, and guiding.
Cement concrete is utilized for the construction of different structures like buildings, bridges. water tanks, tunnels, docks, the harbor is, etc. Cement is utilized to produce lamp posts, telephone posts, railway sleepers, piles, etc.
For producing cement pipes, garden seats, dust boxes, flower pots, etc. cement is commonly used. It is valuable for the construction of roads, footpaths, courts for different sports, etc.
Soundness Test
Setting Time
Soundness Test
Crushing Strength Test

  • field test of cement
  • What is the Initial Setting Time in cement?

    Initial context time and final setting time are the two major physical properties of cement. Initial setting time is the time taken by the cement from combining water to the opening of losing its plasticity.

  • field test of cement

  • The final setting time is the time elapsed from attaching the water to the complete waste of plasticity. Vicar apparatus is used for finding the setting times. The Vicar equipment consists of a portable rod to which any one of the three needles shown in the figure can be attached.
    A symbol is attached to the movable rod. A vicar mold is connected with this apparatus which is in the form of a separating cylinder.

  • field test of cement

  • Before getting the initial and final setting time it is important to determine water to be appended to get standard consistency. These 300 gems of cement are mixed with about 30% water and the cement paste prepared is filled in the mold which rests on a non-porous plate.
    The plunger is connected to the adjustable rod of the vicar appliance and gently reduced to touch the adhesive in the mold. Then the plunger can move freely.
    If the penetration is 5 mm to 7 mm from the bottom of the mold, then cement is having standard consistency. If not, the operation is reappeared with a different dimension of water fill water needed for standard density is found. Then the operations for initial and final setting times can be carried out as explained below:

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