smt 232 quiz: wood recycling and C&D

annual amount of construction and demolition waste in 2018 by EPA

600 million tons

construction

putting together all or part of a structure

demolition

complete removal of building

renovation

partial removal followed by construction

deconstruction

selective dismantlement of a building in order to reuse/recycle components

deconstruction types

soft stripping, structural, total

reasons for deconstruction

reduces need for landfill space, less pollution, protect local site

challenges of deconstruction

some materials hard to remove, contaminated materials, time, money

types of waste wood

industrial, lumbar yard, industry, urban tree, MSW, C&D

sources of used wood

old homes, barns, industrial, warehouses, lake logs, urban logs

percent of MSW that's wood waste

6%, 24% recycled

reuse techniques of recycled wood

building material, furniture, pallets, mulch

used wood criteria

big size, dimension, no lead based paint, no decay or insects, correct moisture, no metal, no glue

steps in reusing recycled wood

deconstruction, wash, dry, scan for nails, rip, mould

classification of wood products

structural vs visual appearance, softwood (pine/cedar) vs hardwood (oak, maple)

wood waste in C&D

20-30%