Masonry material utilizing recycled construction and demolition waste
AssigneeWashington State University
InventorsTaiji Miyasaka, 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.
Claims14
A recycled drywall waste structural composition, comprising:
- a core material, wherein the core material includes:
- 60 percent up to about 85 percent by total dry weight of wallboard demolition waste;
- wherein the demolition waste further comprises 2 percent (%) up to 15 percent (%) by dry weight of recycled paper waste, a dry density range of 1.20-1.23 g/cm3, a resultant percent water absorption of 26.5 up to 36.3, and a resistance to thermal conductivity ranging from 0.266 m2K/W down to 0.251 m2K/W.
Dependencies are inferred from the claim text.