INDUSTRIAL SANDS
www.industrialsands.co.nz
info@industrialsands.co.nz
612 Swanson Rd. Swanson,
Auckland, New Zealand.
Telephone : + 64 9 473 5417
Facsimile : + 64 9 473 8417
Mobile : ( 0274 ) 979 888
Factory : + 64 9 833 7576
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FILTRATION MEDIA
ISL are specialists in the production and supply of Filter Media products – distributed throughout NZ.
Specification:
As a New Zealand standard does not exist for Filter sand, the USA standard AWWA B100 Filtering material is used as a basis in conjunction with NZS 3111 Methods of test for water and aggregate in concrete.
Filter sand is hard grained quartz or silica sand having no constituent & in any way friable or liable to mechanical breakdown when subject to pressure. The sand contains no carbonaceous matter, clay or silt and the loss on acid washing and ignition in each case is less than 2% by weight. The specific gravity is not less than 2.2 or more than 2.5 The filter sand is within the size range of 0.6mm to 2mm
The effective size is approximately 0.65mm. (Effective size is defined as the size such that 10% of sand grains are smaller & 90%larger).
The uniformity of coefficient is the ratio of the sieve size passing 60% to the sieve size passing 10% of the sand.
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