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SUSTAINABLE HOUSING INSIGHT Environmental Responsibility and Affordability
Consider using concrete with high fly-ash content to improve workability and reduce the amount of cement and aggregate needed in the mix. The cement in concrete is made by cooking limestone at a very high temperature, which means it takes a lot of energy to manufacture. To reduce environmental impact and material costs:
Estimate concrete quantities carefully when ordering.
Ensure formwork is adequate to retain the concrete after placement to avoid swelled or failed forms that may result in wastage. Use concrete with the required strength for the application and allow it to cure so that it develops its full potential strength and can have a long, satisfactory service life. For sloped sites, use a stepped foundation to reduce the quantity of wall and footing concrete. Consider using fabric-type forms for footings to reduce formwork and protect footings from rising damp.
RELATED PUBLICATIONS CSA Standard A23.1-09/A23.2-09: Concrete materials and methods of concrete construction/Test methods and standard practices for concrete, Canadian Standards Association
Consider using concrete with high fly-ash content to improve workability and reduce the amount of cement and aggregate needed in the mix. The cement in concrete is made by cooking limestone at a very high temperature, which means it takes a lot of energy to manufacture. To reduce environmental impact and material costs:
Estimate concrete quantities carefully when ordering.
Ensure formwork is adequate to retain the concrete after placement to avoid swelled or failed forms that may result in wastage. Use concrete with the required strength for the application and allow it to cure so that it develops its full potential strength and can have a long, satisfactory service life. For sloped sites, use a stepped foundation to reduce the quantity of wall and footing concrete. Consider using fabric-type forms for footings to reduce formwork and protect footings from rising damp.
RELATED PUBLICATIONS CSA Standard A23.1-09/A23.2-09: Concrete materials and methods of concrete construction/Test methods and standard practices for concrete, Canadian Standards Association
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