Concrete, exfoliated vermiculite aggregate

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Concrete, exfoliated vermiculite aggregate
Categories:	Ceramic; Concrete
Material Notes:	0.25-0.45% drying shrinkage. Vermiculite is a flaky material, each flake formed of many layers, when heated rapidly to a high temperature the flakes open out (exfoliate) to give particles resembling small concertinas. Exfoliated vermiculite added to concrete produces an end product that is lightweight, a good thermal insulator, and fire resistant.
Key Words:	lightweight aggregates
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Physical Properties	Original Value	Comments

Density	0.400 g/cc	8:1 vermiculite-to-cement ratio
	0.480 g/cc	6:1 vermiculite-to-cement ratio
	0.560 g/cc	4:1 vermiculite-to-cement ratio
	0.320 - 0.800 g/cc	dry density range

Mechanical Properties	Original Value	Comments
Compressive Strength	>= 0.700 MPa	8:1 vermiculite-to-cement ratio; 28 day cure
	>= 0.950 MPa	6:1 vermiculite-to-cement ratio; 28 day cure
	>= 1.23 MPa	4:1 vermiculite-to-cement ratio; 28 day cure
	0.700 - 3.50 MPa

Thermal Properties	Original Value	Comments
Thermal Conductivity	0.160 - 0.260 W/m-K	at 5% moisture content

References for this datasheet.

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