Concrete,It’s types & tests

In the simplest form, concrete is a mixture of paste and aggregates. The paste is made of a mixture of cement and water, coats the surface of the fine sand and coarse aggregates and binds them with each other together into a rock-like mass is called concrete.

There are 3 basic ingredients in the concrete mix:

    • Portland Cement.

    • Water.

    • Aggregates (rock and sand)

Types of Concrete:

Different types of concrete are:

  1. Normal Strength Concrete
  2. Plain or Ordinary Concrete
  3. Reinforced Concrete
  4. Prestressed Concrete
  5. Precast Concrete
  6. Light – Weight Concrete
  7. High-Density Concrete
  8. Air Entrained Concrete
  9. Ready Mix Concrete
  10. Polymer Concrete
    • Polymer concrete
    • Polymer cement concrete
    • Polymer impregnated concrete
  11. High-Strength Concrete
  12. High-Performance Concrete
  13. Self – Consolidated Concrete
  14. Shotcrete Concrete
  15. Pervious Concrete
  16. Vacuum Concrete
  17. Pumped Concrete
  18. Stamped Concrete
  19. Limecrete
  20. Asphalt Concrete
  21. Roller Compacted Concrete
  22. Rapid Strength Concrete
  23. Glass Concrete         

1. Slump test:

     This is used to determine the workability of concrete in terms of slump test. After arranging the concrete, a sample of fresh concrete shall be provided to test for slump tests and the samples for the resistance of a material to breaking under compression. strength test be 

   taken too. This is to make sure that the arranged concrete is complying with the mix design

   before it’s released from the arranging plant.

3. Water Permeability test

A water permeability test is a commonly used test to determine the durability of concrete. Three cubes shall be carried out from fresh concrete and tested in  German Standard DIN 1048 at 28 days age. This test shall be taken from sub-structures concrete elements like foundations, concrete water tank, retaining wall, etc. The frequency of the water permeability test can be detailed in this article.

4. Rapid Chloride Ion Penetration Test

It is the same as the water permeability test, this test is used to determine the durability of concrete. Three cubes shall be carried out from fresh concrete provided on-site and tested at 28 days age. The test shall be done in a manner conforming with. with ASTM C1202-97.

5. Water Absorption Test:

Water Absorption Test is used to determine the durability of concrete. The three cube samples shall be provided from the fresh concrete and kept, in the curing tank for 28 days or after 24 hours the concrete sample would be demoulded and it will be delivered directly to the approved third-party laboratory to ensure its curing. The size of the cube sample is 15 cm and tested in accordance with BS 1881-122.

6. Initial Surface Absorption Test:

Three cubes samples should be taken from the fresh concrete sent on the site. It shall be cured for a time and placed inside the curing tank for 28 days to testing. The sample is to be tested in accordance with BS 1881-208 to get a perfect result.

USES OF  CONCRETE:

The life spans for concrete building can be double or triple as compared to other common building materials. A building built with concrete walls, foundations, and floors is very highly energy efficient because they take advantage of concretes essential thermal variety to absorb and retain heat.

Disadvantages of Concrete

As compared to other binding materials, the tensile strength of concrete is low. The weight of concrete is very high compared to its strength. Concrete may hold soluble salts.

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