Quality tests on cement at the building site are performed to know the quality cement supplied by the top cement industries in India, in a short measure of time. It is difficult to check all properties of cement on the site yet there exist some fundamental field tests which can give us a rough idea regarding the nature of cement.
Beneath referenced tests are the basic tests which you can perform effortlessly on site to discover the nature of cement without any tools. These primer tests incorporate checking the properties of cement which influence the cement quality and strength.
Cement Quality Parameters
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Packing date
A few investigations expressed that as the Strength of cement decreases over time. According to IS Specifications, cement ought to be re-tested in the event that it is stored for more than 3 months in the factory.
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Color of Cement
The color of cement ought to be uniform. A perfect shade of cement is grey with a light greenish shade. Cement shading gives a sign of excess clay or lime.
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Check for lumps
Lumps are shaped because of the presence of moisture in cement. Cement experiences a synthetic response when it is responded with the barometrical dampness this procedure is named as hydration. Moisture is a major adversary for cement. Cement becomes waste once it is hydrated with water.
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Rubbing Test
Take a pinch of cement and rub between your fingers, it should feel smooth while rubbing. In the event that it is unpleasant, it shows that cement is mixed with sand.
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Float test to check the quality of cement
Throw a handful of cement in water, good quality Cement should sink and not float on water.
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Hand insertion
Insert your hand in the bag of cement. It must give you a cool feeling. This will show that no hydration reaction has occurred in the cement bag.
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Shape test
Take 100g of cement as well as make a hardened paste by including some water. At that point set up a concrete cake with sharp edges and place it on a glass plate. Immerse this plate in water. See that the shape is not disturbed while settling. Good cement ought to have the capacity to set and achieve strength in water.
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Strength test
Make a block of cement 25 mm x 25 mm and 200 mm long. Inundate the block in water for 7 days. Place the immersed block on supports 15000 mm separated and after that heap with a load of 340 N. the square which is made of good concrete should not show signs of failure.
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Specific Gravity of cement
Discovering explicit gravity of cement is most extremely crucial if cement is stored for over three months.
Verdict
The grade of cement delivered by the cement companies in India ought to be referenced on the bag and it ought to always be packed in synthetic jute or polypropylene packs.
