Low density insulating and fire-resistant perlite concrete
First Claim
1. A method of fire-proofing and thermally insulating a building by substantially filling structural member voids therein comprising the steps ofplacing at least one conforming containment bag within the void to be filled,pumping a cementitious composition containing portland cement and at least 10% by weight of a smooth-surfaced, vesicular, expanded perlite into said containment bag to substantially conform said containment bag to said structural member adjacent said void and to substantially fill said void with said cementitious composition, andallowing said cementitious composition to cure to a substantially hardened state.
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Accused Products
Abstract
The present invention relates to a method of providing thermal insulation and fire-resistance to buildings, by filling voids or spaces in and around structural members with a low density thermally insulating and fire-resistant cementitious composition containing a high proportion of a relatively smooth-surfaced, vesicular, expanded perlite. The method includes placing a flexible, woven, fire-resistant bag in the space to be filled, so as to act as a containment vessel, pumping a cementitious composition into the bag to fill a space by conforming to the shape of the space, while the bag simultaneously contains the cementitious composition in the desired position, and allowing the composition to cure into a lightweight, fire-resistant, and thermally insulating concrete. The method is particularly useful in and directed to remedial, post-construction applications in occupied buildings.
31 Citations
14 Claims
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1. A method of fire-proofing and thermally insulating a building by substantially filling structural member voids therein comprising the steps of
placing at least one conforming containment bag within the void to be filled, pumping a cementitious composition containing portland cement and at least 10% by weight of a smooth-surfaced, vesicular, expanded perlite into said containment bag to substantially conform said containment bag to said structural member adjacent said void and to substantially fill said void with said cementitious composition, and allowing said cementitious composition to cure to a substantially hardened state.
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8. A method of thermally insulating and making fire-resistant a structure by disposing a material within portions of structural members of the structure, comprising the steps of
placing at least one conformable containment bag adjacent the portions of the structural member to be protected, pumping a cementitious composition into said containment bag, said composition being curable into a refractory insulating concrete and containing portland cement and at least about 10% by weight of a smooth-surfaced, vesicular, expanded perlite, filling said containment bag, said filled containment bag substantially conforming to and substantially filling the portion of the structural member, and allowing said cementitious composition to cure to a substantially hardened, refractory insulating state.
Specification