The sand particle consists of
small grains of silica (SiO2). It is formed by the decomposition of
sand stones due to various effects of weather. According to the natural
resources from which the sand is obtained, it is of the following three types.,
(i) Pit sand
(ii) River sand
(iii) Sea sand
According
to the size of grains, the sand is classified as fine, coarse and gravel. The
sand passing through a screen with clear openings of 1.5875 mm is known as fine
sand. It is mainly used for plastering. The sand passing through a screen with
clear openings of 3.175 mm is known as the coarse sand. It is generally used
for masonry work. The sand passing through a screen with clear openings of 7.62
mm is known as the gravel sand. It is generally used for concrete work.
No comments:
Post a Comment