Low density insulating concrete roof decks are monolithic composite systems cast over galvanized metal decks structural concrete wood decks or existing roof systems.
Lightweight concrete roof wood deck.
Hard rocks with a low water absorption rate and weighs approximately 2403 kg m 3 150 lb cf.
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Lwic decks provide high r values built in air barriers fire ratings sound ratings and improve the overall performance of the building envelope.
Roof systems installed over structural lightweight concrete in the tight time driven sequence of construction will likely incur a very heavy upward water vapor drive.
Dektek tile is an elegant and innovative precast concrete decking material that is especially designed for elevated decks and roof decks.
With standard structural concrete the aggregate used is sand and stone.
Concrete roof deck systems lightweight insulating concrete lwic roof decks are high performance roof insulation systems that reduce roof maintenance and replacement costs.
However when a lightweight structural concrete lwsc roof deck is poured in place it uses significantly more water.
It is designed for efficient construction of gradient and thermal insulating layers of flat roofs.
Polystyrene lightweight concrete s density compression strength and thermal conductivity are similar to that of foam concrete.
Dektek s luxury tile decking is custom poured high strength concrete deck tiles that support more than 1 000 lbs per tile.
Thereafter precast systems are commonly topside insulated below the roof cover using adhered insulation panels or cast in place lightweight insulating concrete.
The light weight is achieved through use of expanded aggregates such as perlite or vermiculite air entrainment or both.
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The normal weight concrete employs standard aggregates i e.
Lwic can be placed atop any of the above mentioned concrete deck types or directly upon a properly supported corrugated steel.
Because of the relatively high aggregate content excess free water is used in pouring the deck.
Lightweight insulating concrete decks non structural low density lightweight insulating concrete lwic can be placed upon a variety of structural deck systems that have been designed to carry loads.
With structural lightweight concrete a mix of shale slate slag and clay are used and with this mix the aggregate is fully saturated prior to mixing.
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