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WHAT IS PUMICE
WHAT IS PUMICE CRETE
BENEFITS OF PUMICE
INSTALLATION OF PUMICE CRETE
CONTACT US
SABAY BIMSSTEIN
SABAY PONCE
PUMICING DI SABAY
PIEDRA POMEZ DE SABAY
POLIMENTO DE SABAY
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| INSTALLATION OF PUMICE CRETE |
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| HOW TO USE PUMICE CRETE IN CONSTRUCTION |
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| Pumice-Crete is mixed, either at a central plant and delivered in standard mixer trucks, or right on site with only enough cement to coat the aggregate and bind it. More cement increases the strength but reduces the thermal insulating qualities, whereas less cement increases the thermal insulating qualities but reduces the structural adequacy. For a single-story structure for example, an average mix proportion would be 2 to 2.5 bags of Portland cement for every cubic yard of Pumice-Crete with enough water to create an even paste around the aggregate. Pumice-Crete is usually poured on top of a concrete footing or slab. The reusable forms can be lighter than for conventional concrete construction, usually consisting of 1/2" plywood with 2x4 frame backing at 2' spacing. For up to two-story construction walls are poured with a thickness of 14" to 16", requiring no additional insulation or structural reinforcement. Pumice-Crete can be reinforced to increase seismic and additional load resistance. According to a contractor, Pumice-Crete domes spanning 30' and rising two stories can be poured with no interior support. Window and door openings are defined with 2x wood frames, which are more economical and lighter than typical concrete forms. Once forms are removed, after an average cure time of 3 days for a 16" wall, surfaces are plastered with two interior and two exterior coats, which improves thermal performance by trapping air within the honeycomb pumice-crete mix. Because of the uniform coarseness of the poured wall, plaster surfaces do not require stucco netting. Different roof systems can be specified for Pumice-Crete walls. After the desired height of the wall is reached either a structural concrete bond beam is poured over the top where anchor bolts are provided to fasten to wood plates, or rebar can be extended from the bond beam for masonry roof systems. |
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