Sand Extraction


Our Products
	McCallum Bros Ltd supplies high quality sand suitable for a number of industries including the building and construction industry. Sand is an important commodity for the building and construction where high-quality sands (defined by their mineral content, grain size, and the absence of components such as organic material and clays - all of which reduce the strength of concrete) are primarily used in the production of ready-mixed concrete.
Other uses for our sand products include landscaping, sportsfield drainage, sports turf, beach replenishment and industrial use.

Sources of Sand
Offshore coastal sand extraction is a significant source of sand throughout the world including Britain, France, Germany, Holland, Denmark, Sweden, Belgium, United States, Taiwan, South Korea and Japan. The main source of sand for Auckland’s building industry (as with similar regions around the world) is from marine coastal deposits.

Extraction Methods
In the Auckland Region, marine coastal sand extraction is typically carried out using suction dredges from consented areas. Sand is screened using mesh sizes of the order of 3 mm. The material caught on the screen (including shellfish, snails and other marine life) is returned to the seabed.