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Cleaner Technology Projects in Denmark 1996

The Recycled House– Cleaner Technology – Appendix Reports

The project contains a concrete assessment of aspects concerning resources and environment in connection with "The Recycled House". The assessments are compared with a conventional construction. The project also presents a method based on the life-cycle idea for the assessment of environmental aspects in connection with construction. The method includes the following aspects:

	Work environment
	Internal environment
	External environment

The project consists of a general report and six appendix reports. The general report contains a summary and conclusions, recommendations and a review of the results of the resource and environmental assessments. The appendix reports are independent reportings of the different project activities.

	Appendix report 1: Description of method for resource and environmental assessment of the construction elements
	Appendix report 2: Comparison norm
	Appendix report 3: Registration of work environment
	Appendix report 4: Analysis of waste production and waste handling
	Appendix report 5: Energy analysis of the production
	Appendix report 6: Assessment of environment and work environment

Appendix report 1 describes the method for comparing the assessment of construction materials used in "The Recycled House" and the conventional house. The method is designed for the concrete project, but can also be used as a paradigm for comparing resource and environmental assessments of construction projects in general.

Appendix report 2 contains an environmental audit of the demonstration project "The Recycled House". The environmental audit is a comparative assessment, in which the reference is a conventional house with corresponding utility value. In the report, the aspects that separate "The Recycled House" from the conventional alternative are identified and described.

Appendix report 3 contains an assessment of the work environmental conditions in the phases: demolition, production and construction of "The Recycled House". The assessment is only made where the work environment differs from conventional construction in connection with:

	Providing of secondary raw materials
	Production of building goods with recycled materials
	Construction in connection with building elements with recycled materials

The point of departure is taken in the method described in appendix report 1. Subsequently, in the light of the gained experience, the method has gradually been developed and adjusted.

The purpose of the analysis in appendix report 4 is to estimate how the waste production from "The Recycled House", from a relative point of view, differs from the waste production of conventional new building. Simultaneously, an assessment of the size of the waste production is made. This is done because the processing of the recycled building materials compared to the production of new materials, in reality causes an extra waste production. In the construction of "The Recycled House" it is the first time that a comparison of waste production in new building with and without recycled materials is made.

In appendix report 5 the expected gross energy consumption in the construction of the house is analysed. The particular energy demanding conditions in connection with the production, use and disposal of materials for the "Recycled House" and the comparison norm are identified. The following elements are identified.

	Contribution to air emission
	Energy consuming processes of a building’s life cycle
	Waste
	Life cycle of the materials
	Energy analysis of the building elements

The aim of appendix report 6 is to estimate the environmental and work environmental consequences in "The Recycled House"" seen from a life-cycle perspective. Against this background, a basis for comparison with a conventional building is made. The basis for the assessment of environmental and work environmental conditions is the selection of building elements and materials used in both the comparison norm and "The Recycled House". For each building element an environmental and a work environmental assessment of the complete life cycle is made, that is, an assessment of the following phases:

	Extraction of raw materials
	Production
	Use
	Disposal and recycling

Author/ institution

COWIconsult in co-operation with Laboratoriet for Bygningsmaterialer (The Laboratory for Construction Materials) and Danmarks Tekniske Universitet (The Technical University of Denmark), Institute for construction technique.

This report is subsidised by the National Council for Recycling and Cleaner Production

ISSN no. 0908-9195
ISBN no. 87-7810-602-8

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