How many types of sand are there?
Which types of sand should I use for Brickwork?
Which types of sand should I use for plasterwork?
Which types of sand should I use for concrete?
There is a lot of confusion out there.
Okay. I’ll try to clear the confusion in this post.
Types of Sand
Sand can be classified based on various criteria. Such as General criteria and Engineering criteria.
Based on General criteria, sand can be many types. For example, coral sand, black sand, gypsum sand, etc.
We’ll ignore the general criteria. We will consider the types of sand from the civil engineering point of view.
From the engineering point of view, the sand can be classified based on various things. I’ll discuss them one by one below.
Based on Its Source
Based on the source of the Sand, It can be two types – Natural and Artificial.
Based on where the sand is collected from, the Natural sand can be the following types:
- Pit sand
- River sand
- Sea sand
Let’s discuss them thoroughly.
This is a type of Natural sand.
- Source of Pit sand:
This sand is collected from the ground by digging a pit.
The pit’s depth is about one-two meter from the ground level.
Pit sand consists of sharp, angular and rough grains. it is free from salt and organic materials.
Because of the absence of salt in this sand, it doesn’t absorb moisture from the atmosphere.
- Sand Type:
Pit sand is coarse type sand (I’ll discuss coarse sand later in this post).
Due to the coating of iron-oxide, it shows red-orange color.
Due to its superior binding quality, it is widely used in civil construction.
River sand is also a type of natural sand.
It is obtained from a river bed or a river-bank.
This sand consists of fine rounded grains and It is well graded.
- Sand Type:
River sand is Fine-type sand ( I’ll discuss fine sand later in this post).
It has a white-grey color.
It is available in clean condition and can be widely used for all-purpose of construction activities like plastering and concreting.
This Natural type of sand is obtained from sea-shore.
It consists of rounded grains.
- Sand Type:
It is also Fine-type sand.
The color of sea sand is light-brown.
This type of sand is not normally used for construction work. Because it has salt in it which attracts the moisture from the atmosphere and causes for dampness, efflorescence, and disintegration of work. It should be thoroughly washed before using in construction.
It is an effective alternative to river sand. It is produced by crushing either basalt rock or granite. It is well-graded and coarse-type sand.
Based On Sieve Analysis
Based on sieve analysis sand can be divided into following three types –
- Fine sand
- Coarse sand
- Gravelly sand
Sand passing through the 1.5875 mm sieve is called fine sand. We use this sand mainly for plastering purpose.
The sand which is passing through the 3.175 mm sieve is called coarse sand. For masonry work, we mostly used this type of sand.
The sand which is passing through the 7.62 mm sieve is called gravelly sand. We generally use this type of sand in concrete.
Types of Sand Based on Their Purpose of Use
Based on where to be used, the sand can be classified as follows –
- Brick sand
- Plaster sand
- Concrete sand
This sand is obviously used for brickwork. The Fineness Modulus of this sand should be 1.2 to 1.5 and should not contain more than 4% silt.
Obviously, it is used for plastering work. The fineness modulus should not be more than 1.5 and silt content should not be more than 4% in this type of sand.
For the concreting purpose, we generally use coarse sand. The fineness modulus of this sand should be 2.5 to 3.5 and it should not contain more than 4% silt.
Based on Their Grain Size
Based on the grain size of the sand it can be classified as follows –
Very Fine Sand
If the grain size of the sand between 0.0625 mm to 0.125 mm then it is called very fine sand.
The grain size of this type of sand is between 0.125mm to 0.25mm
If the grain size of the sand between 0.25mm to 0.50mm that is the medium sand.
This type of sand’s grain size is between 0.50mm to 1.0mm.
Very Coarse Sand
The grain size of this type of sand is between 1.0 mm to 2.0 mm.
There are some other types of sand available in the construction sector such as landscaping sand, paving sand, etc. I didn’t include them as the types of sand. Because they don’t make any sense.
What do you think about landscaping sand, paving sand, etc? Please share your opinion in the comments below…