Soft washed sand, with a particle size of 0-2mm, finds its primary application in construction. Its fine texture makes it ideal for creating strong, cohesive mixtures.
Key Uses of Soft Washed Sand:
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Mortar Production: It's a crucial component in making mortar for laying bricks, blocks, and paving. The fine texture ensures better binding with cement and water, resulting in strong adhesion between building materials. [Silverton Aggregates, AABC Group, Canvey Supply Company]
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Plastering: Soft washed sand is frequently employed in plastering, providing a smooth and workable consistency. [AABC Group, Canvey Supply Company] While suitable for plastering, some prefer coarser sand for certain finishes. [Plasterers Forum] Washed sand is favored for lime plastering, though the exact reasons are debated. [Period Property Forum]
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Other Construction Applications: Although primarily used in mortar and plastering, it falls under the broader category of "builder's sand," which has various uses in construction. [AS Paving]
Considerations and Contrasting Uses:
It's important to note that while soft washed sand is suitable for many applications, it is not recommended for all types of brickwork. Some sources suggest that mortar made with soft washed sand can be too rigid, increasing the risk of wall cracking. [DIYnot Forums] Furthermore, it differs from sharp sand, which is used for other purposes, such as improving soil drainage; soft washed sand is too fine for this. [Reddit GardeningUK] In contrast, silica sand, which has a different particle size and properties, is used for water filtration. [Soilyourself.au] The sand used in chicken coops is also typically washed construction-grade sand, and not play sand. [The Chicken Chick]
