Standard granules GS1

GS1 0,04 – 2,5
mm Standard granules GS1
Descriptions and a table of characteristics of KERWOOD^® foamed ceramic microspheres

A foamed ceramic microsphere with average technical characteristics. It was developed as a basic universal granule for a wide range of applications with a size of 0.04 — 2.5 mm. It is produced serially, being a standard warehouse item.

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The most widely-distributed type of microspheres

Index	Fraction, mm
	0.04 – 0.12	0.1 – 0.3	0.3 – 0.6	0.1 – 0.6	0.6 – 1.25	1.25 – 2.5
Article	GS1 0040-012 / 530	GS1 01-03 / 440	GS1 03-06 / 380	GS1 01-06 / 420	GS1 06-125 / 330	GS1 125-250 / 300
Apparent density, kg / m³	530±70	440±40	380±30	420±40	330±30	300±20
Volume (apparent) density of granules, kg / m³	1100±140	940±100	610±40	750±70	480±40	420±40
Compression strength in the cylinder, MPa, not less than (GOST 9758-2012, cylinder diameter 150 mm)	7	2.5	2.2	1.7	1.3	1.2
Coefficient of thermal conductivity, W / (m ·°K), not more than	0.09	0.085	0.08	0.083	0.077	0.072
Water absorption for 24 hours by weight, %, not more than	8	7	5	6	4	4
Resistance to silicate decay, %, not more than				2.5
Content of water-soluble sulphurous and sulphate compounds, %, not more than				1
Frost resistance, loss of mass after 25 cycles of freezing, %, not more than				5
Loss of mass during boiling, %, not more than				5
Humidity, %, not more than				0.5
Activity of natural radionuclides, Bq / kg, not more than				370

Tests in accordance with the Russian State Standard (GOST 9758-2012), except for water absorption;
Determination of water absorption according to DIN 4226-3-2002;
Determination of activity of natural radionuclides according to the Russian State Standard (GOST 30108-94);
Coefficient of compaction is 1.3;
Apparent density is determined with free filling, in the unconsolidated state of the material.

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