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BASALT

The name “basalt” derives from the Ethiopian word “basal” meaning “boiled”. It is the most widespread among all extrusive rocks. By their appearance they are dark (dark grey or black), dense and fine-grained rocks with high solidity.

Basalt is extracted openly in quarries and is used as construction stone, as macadam and stone block in road construction, and as filler for concrete. Basalt columns are used in port facilities. It is often used for external finishing of buildings and as material for open-air sculptures. It is an ecologically clean, non-inflammable, heat-insulating material. Indisputable are the advantages of basalt materials in the production of heat resistant products: they can be used within the temperature range of -269°С to +700°С. They don’t collect radiation and are chemical-resistant.

Quarry: Shaki Community, Syunik Region, Armenia.

Chemical composition

No.	Content, %
1	SiO₂	Fe₂O₃	CaO	K₂O	MgO	TiO₂	Al₂O₃	SO₃	P₂O₅	x
2	53.17	7.78	7.6	2.6	4.36	1.05	17.54	0.75	4.23	0.19

Physical-Mechanical Features

No.	Factor	Measurement Unit	Average Value
1	Volume weight	kg/m³	2264
2	Density	g/cm³	2.8
3	Porosity	%	17.9
4	Water absorption	%	2.8
5	Frost resistance coefficient		0.88
6	Breaking point
	when dry	kg/cm²	486
	when watered	kg/cm²	392
	after 25 cycle freezing	kg/cm²	274

Application: interior finishing (floor, walls, stairs, balusters, column bases, cornices, etc.)