Environmentally Friendly Cement
Contribution of Cement and Concrete to a LEED-NC project
American and Canadian LEED
Our LEED Achievements
Cements made using the Synergia™ Process of Ciment Québec Inc. (CQI) help reduce the carbon footprint of concrete.
Using the Synergia™ Process, the clinker (product resulting from heating the components of the cement before grinding and including additives) of CQI requires less energy and produces less air pollution than competitive processes. Cement made using the Synergia™ Process is more eco-efficient.
Limestone and gypsum are added to the clinker to make cement. The Canadian Standard Association (CSA-A3001-08) Standard allows the addition of up to 15% limestone to cement. Gypsum is used to regulate the setting time of the cement. All cements—simple and complex—have gypsum as an ingredient.
Industrial waste, such as silica fumes, fly ash, and other materials, can be added to base cement. Since they are recycled in the cement, this waste is diverted from landfills where it would normally end its useful life. Ciment Québec Inc. produces excellent cement using silica fumes : SF-modified type GU.
These additives help reduce the need for clinkers and substantially reduce the carbon footprint of cement. Concrete containing these cement product are in line with the LEED vision.
From a Local Source?
CQI is supplied locally. Stone used to produce the clinker is extracted from quarries near the cement plant and the silica fumes come from Quebec industry. Hence, we avoid greenhouse gas emissions associated with transportation and encourage regional economy.