Pumice-Crete is a low density and resource-efficient concrete consisting of pumice aggregate, Portland cement, and water. It is an economical alternative to conventional building methods and materials since it combines structural strength and insulation in one product. Besides the variety of design applications Pumice-Crete is a durable, fireproof, and noise-resistant material that can be used in a variety of climates.
Pumice is a lightweight volcanic, sponge like rock formed by expansion of gases while molten lava rapidly cooled.Due to the material's inert nature it does not react with any of the ingredients of concrete or steel. With an average cured weight of under 50 lbs per cubic foot, Pumice-Crete produces a cured strength of 400 psi (compared to 2,000 psi in concrete) with an insulating value of R-1.5 per inch (compared to R-0.1 in concrete). Although over 350 residences have been completed in Colorado and New Mexico with Pumice-Crete, no official fire rating has been performed.
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