Pebble/quartz gravel was weathered rocks stone water long-term handling of 60~200mm blunt natural grain size; Is greater than 200mm, then called Boulder. Gravel (gravel) is a long time, and gradually formed. Gravel (gravel) forming process can be divided into two stages, the first stage is the weathering of rocks, collapsing stage; Second stage is the handling and rounded rocks by the River in the river stage. Contains small stones and gravel, the cause is a broken rock blocks, only long distance transportation to make edges disappear, forming a cylinder, cone or stone ellipsoid (or gravel, gravel), and then by cementing rock known as gravel.
Pebbles support layer filter material, is the result of excavation of natural streams, screening, selected from the water, spherical-shaped pure color and noise, this product without impurities, water works, mechanical filters, cation-anion exchangers and other necessary materials. The indicators are in line with the GJ24.1 standard.
Analysis of test data analysis of test data
Silicon dioxide soluble in hydrochloric acid ≥ 98% rate 0.2%
Density 2.6g/cm3 capacity 1.85g/cm3
Clay content (1.1% mechanical strength 7.5
Pebbles is a necessary cushion in various filter media, I produced with natural pebbles (was elliptical-like noise) and machining-Pebble (nearly spherical, white) stone hard resistance wear resistance, is the best filter mat materials and common specifications: 2-44-88-1616-2525-3232-50.
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