A study of the effective reuse of wooden waste by hand-demolition method

empirical study based on the model demolishing work

Abstract

For the effective reuse of wooden wastes discharged from demolishing work of wooden houses, the hand-demolition method was proposed so that the main parts such as columns, beams and others were recovered and reused for building halters after appropriate processing. The demolishment of houses was performed actually by hand-demolition method and the quality and amount of wooden wastes discharged were investigated. Based on these results, hand-demolition system proposed was compared with the present machine-based classifying demolition one concerning house demolition works, construction wastes treatment required, and recycling from the viewpoints of environmental and economic aspects. In all operations, the hand-demolition system required less energy and cost than the machine-based classifying one and the woods recovered could be effectively reused as house-building lumbers converting to the recycled lumbers and laminated lumbers. The wooden wastes could be stocked as house-building lumbers without burning or landfilling and they could contribute to a certain extent to decrease the generation of CO2.