Crushed sand, also known as M sand (Manufactured
sand), is an alternative to natural river sand in construction applications. It
is produced by crushing rocks, quarry stones, or larger aggregates into
sand-sized particles. Here's a detailed explanation of crushed sand or M sand:
Production Process:
Crushed sand is manufactured through a mechanical crushing process. The rocks
or aggregates are initially broken down into smaller pieces using jaw crushers,
cone crushers, or impact crushers. The resulting coarse aggregates are then
further reduced in size to obtain sand-sized particles through the process of
shaping, screening, and washing.https://amzn.to/3IDadPf
Particle Size and Shape:
Crushed sand or M sand is characterized by its uniform particle size
distribution. It typically consists of particles ranging from 150 microns to
4.75 millimeters in size. The particle shape of crushed sand is angular or
cubical, with multiple fractured faces. This angular shape contributes to
better interlocking and bonding properties in concrete and other applications.
Availability and Sustainability:
Crushed sand is often used as a substitute for natural river sand due to the
limited availability of river sand in certain regions. The excessive mining of
river sand can cause environmental issues such as riverbed erosion and
depletion of natural resources. The use of crushed sand helps to conserve
natural resources and reduce the environmental impact associated with sand
extraction.
Quality and Grading:
To ensure consistent quality, crushed sand production involves controlling the
grading and particle shape through various stages of crushing, screening, and
washing. Proper quality control measures are implemented to meet specific
requirements and standards for different applications.
Benefits and Applications:
Crushed sand offers several benefits in construction applications:
Improved Workability: The angular shape and rough
texture of crushed sand provide better workability and cohesion in concrete
mixes.
Higher Strength: Crushed sand contributes to higher
compressive and flexural strength of concrete compared to natural river sand.
Reduced Shrinkage: The uniform particle size
distribution of crushed sand helps to minimize drying shrinkage in concrete.
Cost-Effectiveness: Crushed sand can be a
cost-effective alternative to river sand, particularly in regions where river
sand prices are high or availability is limited.
Suitable for Plastering and Masonry: Crushed sand is
also used in plastering and masonry work, providing a suitable surface for
plaster application and ensuring better bonding between masonry units.
It's important to note that the quality of crushed
sand or M sand can vary depending on factors such as the source of the
aggregates, the production process, and adherence to quality standards. It is recommended
to use crushed sand from reputable suppliers that follow proper production and
quality control practices.
Overall, crushed sand or M sand offers a sustainable
and reliable alternative to natural river sand, providing consistent quality
and performance in various construction applications.
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