Super Fine Grade A1 South African Vermiculite
.5 mm to 1 mm
J.P. Austin / A-Tops Vermiculite A - 1
J.P. Austin / A-Tops Vermiculite Grade A 1 is a premium, super fine particle size material meeting ASTM C516 Type 1, Grade 1 specifications. The material is ideally suited for use in industrial, horticultural, agricultural and construction applications.
Vermiculite is the geological name given to a group of hydrated, laminar minerals which are aluminum-iron-magnesium silicates, resembling mica in appearance. When exposed to intense heat, the material expands or exfoliates.
Exfoliated vermiculite has several unique properties which have industrial applications and account for its commercial value. These properties include, low thermal conductivity, high water holding capacity, incombustibility, and insolubility in both water and organic solvents.
Typical Sieve Analysis:
Unit Weight 5.5 6.5 lb/cf
pH in Water 8 9
Moisture loss @ 230°F 4 10%
Sintering Temp. 2100 - 2280° F