TECHNICAL DATA: HESS EXPANDED PERLITE GRADES Hess Perlite Grade 270E

EXPANDED PARTICLE SIZE SPEC GRADE 270E DESCRIPTION Perlite ore is a glassy volcanic rock with a SIZE ALLOWABLE vitreous, pearly luster and a characteris- MICRON U.S. MESH PERCENT PASSING tic concentric or perlitic fracture. Closely 595 30 69-100 related to pumice, it di ers from other 149 100 0-49 volcanic glasses principally in its com- TEST METHOD: C29 bined water content, which produces the unusual characteristic of expanding, or “popping,” up to 20 times its original EXPANDED LOOSE BULK DENSITY GRADE 270E volume upon being exposed to rapid, 5-6 lbs/per cubic foot controlled heating. Rapidly heating perlite ore to temperatures of about CHEMICAL COMPOSITION AND PHYSICAL PROPERTIES 900°C (1,700°F) soens the volcanic Chemical Name: Sodium Potassium Aluminum Silicate glass, causing entrapped water molecules in the rock to turn to steam and expand TYPICAL ANALYSIS GENERAL PROPERTIES the particles like popcorn. e resulting • Silicon Dioxide: 76.5% • Appearance: White Powder, Odorless expanded particles—actually clusters of • Aluminum Oxide: 13.5% • Refractive Index: 1.5 minute glass bubbles—are spherical in shape, usually u y or frothy, highly • Potassium Oxide: 4.65% • Hardness (MOHS): 5.5 porous due to a foam-like cellular • Sodium Oxide: 3.34% • pH: Neutral internal structure, and have a very low • Iron Oxide: 1.18% • Fusion Point: 1260 degrees C (2300F) density. • Calcium Oxide: 0.89% • Flash Point: Non- amable GRADE APPLICATIONS • Titanium Oxide: 0.8% • Specic Gravity: 2.33 Used for: masonry loose ll insulation, • Chlorine: 0.5% • Solubility: lightweight concrete and plaster sand, • Barium Oxide: 0.18% • Negligible in water and weak acids cryogenic applications, high-temperature • Soluble in hot concentrated alkali and HF • Magnesium Oxide: 0.12% insulative applications, water retentive • Moderately soluble (<10%) in 1N NaOH nes in engineered soils and soilless • Bound Water: 3.0% • Slightly soluble (<3%) in mineral acids (1N) grow media, functional bulking agent, • Thermal Conductivity (at 75˚F/24˚C): lter aid. Conductivity: 0.3332 Btu•in/ft2•hr•˚F Resistivity (R-per-inch): 3.001 ft2•hr•˚F/Btu•in PACKAGING OPTIONS • Plastic Bags (4 cubic feet) • Super sacks (55 or 118 cubic feet)

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