How To Check The Quality of Sand At Site


Sand is the main part of construction. Sand used for plastering, concreting, brick work and stone masonry.

Sand is one of the main constituent of mortar and concrete, in concrete purpose of mixing of sand is to fill the voids between course aggregates. And in between voids of sand is filled with cement.

Sand is known as fine aggregate. Sand is formed buy the action of weather on the rocks. Many types of sands are used in construction field . They are river sand, Sea sand and pit sand . But cement mortar and concrete works mostly river sand is used.

The size of aggregate live between 75 microns to 4.75 mm is called fine aggregate ( sand) .
If the quality of sand is not good then the quality of work is not satisfied. Because sand is major part of concrete and mortar, so it affects work quality.

How to check quality of sand at site. Below I will provide some simple tests instead of laboratories test. because we don’t have much time and equipment at site. The following main tests are perform quickly at site to find the quality of sand.

1.Clay content test
2.Organic impurities test 
3.Silt test
4.Salt test 
5.Earth matters.

1. CLAY TEST.

The presence of clay in sand is to affect the actual compressive strength of concrete. The presence of clay in sand is finding out by doing below simple test at site.




Take a glass bottle fill some amount of sand then add some quantity of water. Then shake it 10 times and allow some times to settle. If the clay is present in sand. It will form layer at the water surface. So the quality of sand is not good.



In second method take some amount of wet sand in your hand then drop it. If the presence of clay in sands it make cohesion in your hand.


2. PRESENCE OF ORGANIC IMPURITIES IN SAND.



To find the presence of organic impurities in sand . Take some amount sand and add it to sodiyem hudroxide.then shake the solution for 1 minute. If the colour is change to brown. It indicate the presence of organic impurities in sand.

3. SILT CONTENT TEST



Take a glass bottle add some amount of sand and add some amount of water as well as salt into the bottle. Then shake it sometimes after shaking then allow it to settle at least 10 hours. If the silt is present in sand it will form a layers above the sand layer.

4.SALT TEST



This is simple and easy method to check the presence of salt in sand.Take small amount of sand in your hand and taste it . If the presence of salt in sand it will make salty taste.

5.EARTHY MATTERS.

Almost earthy matters are present in sand. It is the common issue. To check the presence of earthy matters in sand at site we mainly prepare following physical test.


Take partially sand in your one hand and rub it with in your other hand. Then leave the sand from your hand. If the light marks are appear in your hand it indicate the presence of earthy matters ( sand ) .

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