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permalite cryogenic pialite lite cool filter aid

 

IV. Construction Grade, lightweight concrete, fire proofing aggregate


LIGHTWEIGHT CONSTRUCTION MATERIALS


COMPOSITION


PIALITE Lightweight Construction
Materials are made from perlite, a siliceous volcanic rock containing a small amount of combined water. To prepare perlite constructions applications, perlite ore is heated at a temperature between 1400°F to 1600°F When heated the trap water vaporizes and the perlite expands and turns white. The expanded perlite contains countless air cells that account for its excellent insulating and lightweight properties.


PIALITE PERLITE CONSTRUCTION GRADE (C.G.)

PIALITE Perlite Construction Grade (C.G.) is a lightweight concrete and pre-cast aggregate for construction. When it is mixed with portland cement and water, it produce an ultra lightweight concrete with exceptional thermal and acoustic insulating capabilities. It is used for roof, wall and floor fills, slabs/partitions, pre-cast floor and wall, decorative pre-cast, and other non - load bearing concrete applications.

PIALITE Perlite concrete aggregate
Combined with portland cement and water produces a lightweight roof and floor fills, lightweight structural decks insulation for steam and coolant lines, bases of cryogenic storage tanks, pre-casting preparations, and fibers are often introduced to increase strength.


PIALITE Perlite roof deck insulation systems has been tested. Perlite insulating concrete is ideally suited for providing slope and is adapted to any roof configuration.


PIALITE Perlite concrete roof insulation systems are also well suited for reroofing applications. They provide permanent, cost-effective, slope-to-drain designs with high R values over flat and often irregular substrates found in reroofing projects.


Depending upon the condition of the existing roof, perlite concrete may be installed directly to B.U.R. and gravel roofs thus eliminating costly tear-offs.


Applicable ASTM Standards:


ASTM 332 – Specification for Lightweight Aggregates for Insulating Concrete.


ASTM 495 – Test for Compressive Strength of Lightweight Insulating Concrete.


ASTM 513 – Securing, Preparing and Testing Specimens from Hardened Lightweight Insulating Concrete for Compressive Strength.


Physical Properties of PIALITE perlite concrete vary according to mix design. Perlite concrete can be made with a dry density of 20 lb/ft3 (320 kg/m3) or with the addition of sand or other aggregates up to 90 lb/ft3 (1440 kg/m3). The lower the density, the higher insulating value. For most applications, and to have a acceptable balance between compressive strength and insulating value, a 1:6 mix is chosen with a density of between 24 and 30 lb/ft3 (0.085 to 0.065 W/m-K) and compressive strength of 125 to 200 psi (986 to 1378 Pa). For specific applications requiring higher strength or other special properties, consult PT. PERLITE INDONESIA ABADI.


Perlite concrete must be installed by a highly equipped and trained crew. The crew must furnish all labor, Materials and equipment for installing the perlite concrete over the specified structural substrate or form. Installation must be in conformity with specification of the perlite institute, Inc.


Perlite concrete must meet the specified physical properties at the point of replacement.


A minimum 1 inch (25.4 mm) pr 100 linear feet (30.5 m) thick control joint should be installed through the thickness of the perlite concrete around the perimeter of the roof deck and at through the building expansion joints. Control joints may be eliminated when substrate is galvanized steel deck.


As soon as the perlite insulating concrete can carry construction traffic, the built-up roofing must be applied. Under normal conditions, the perlite concrete should be permitted to cure at least 3 days. There are various acceptable methods of employing roofing attachments.

 

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