Engineering

CHARACTERISTICS AND FUNCTIONS OF SAND

Let’s explain the definition, meaning and characteristics and also the functions of sand in this comprehensive article:

Sand which is used as fine aggregate in the preparation of cement or lime mortars, consists of small angular rounded grains of silica (Sio2) and is formed by decomposition of sand stone under the effect of weathering agencies.

Sand is of two types i.e Natural and Artificial. Natural sand may be river sand, sea sand, nala sand. River sand should not be used for mortars which are exposed to weather. Sea sand contains salt contents hence it should be washed with fresh water before use . Artificial sand is prepared by crushing stones and gravel to powder.

Characteristics of Sand

Six main characteristic of sand are featured as following:

1. It should be clean and free from coatings of clay and silt.

2. It should be free from hygroscopic salts.

3. It should have coarse, angular, hard and sharp grains.

4. It should not contain organic matter.

5. It should be strong and durable.

6. It should be chemically inert.

Functions of Sand

Functions of sand can be broadly summarized below:-

1. On drying it prevents the cracks in the mortar.

2. It is used for making mortars of desired strength by varying it proportion with the binding material (cement or lime).

3. It increases the density of mortars.

4. It reduces the shrinkage of the binding material.

5. It helps in early setting of mortar.

6. It is added to the binding material to make the mortar economical

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Thalib Tantary

My name is Thalib Mushtaq Tantary and i am the founder of this very site. I am a medical or civil engineering student and i love to help people get out of trouble they counter in their lives.
Since most often students find it difficult to understand their text books or even there many who can not afford such books, therefore we prepared ourselves to solve this problem faced by them.

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