Masonry material utilizing recycled construction and demolition waste
AssigneeWashington State University
InventorsTaiji Miyasaki, David Drake
Life of this patent
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Abstract
The embodiments herein are directed to dry wall waste mixtures, formed under pressure into example embodiments referred to herein as dry wall waste blocks (DWBs) and/or gypsum wallboard waste blocks (GWWBs) and tile structures. DWBs/GWWBs mixtures in particular, often incorporate a higher percentage in the composite mixtures from about 60% up to 85% of dry wall waste than other mixtures and beneficially often incorporates substantially all of the wallboard facing paper as part of the composite mixture. That is, waste processing is simplified by comingling core and paper layers in the final product. DWBs/GWWBs mixtures utilize demolition and construction waste, replacing a high percentage of Portland cement with waste-derived binder.
Claims17
A method for forming a structural unit from a wallboard material, comprising:
- comminuting a wallboard material comprised of a gypsum material having a wallboard front facing paper and a wallboard back facing paper respectively positioned on a front and a back of the gypsum material,
- wherein the comminuting is performed such that at least some of the wallboard front facing paper and the wallboard back facing paper are not separated from the gypsum material, and
- wherein the comminuting produces a comminuted material having particles that include the gypsum material with at least some non-separated wallboard front facing paper and/or non-separated wallboard back facing paper;
- mixing the particles that include the gypsum material with at least some of the non-separated wallboard front facing paper and/or the non-separated wallboard back facing paper with water and one or more aggregates and binders to form a composite mixture configured with a damp consistency, wherein damp consistency comprises a water percentage such that a sample, when gripped prior to curing, holds shape;
- and
- forming the composite mixture into the structural unit.
Dependencies are inferred from the claim text.