· Differences Between Ordinary Portland Cement And Portland Pozzolana Cement Cement is made by heating limestone (calcium carbonate) with small quantities of other materials (such as clay) to 1450°C in a kiln. The resulting hard substance, called 'clinker', is then ground with a small amount of gypsum into a powder to make 'Cement', the most commonly used type of cement. This .
EPDs from different programs may not be comparable. PRODUCT General Use (GU) and PortlandLimestone (GUL) Cements DATE OF ISSUE March 21, 2016 PERIOD OF VALIDITY March 21, 2016 – March 20, 2021 EPD REGISTRATION NUMBER EPD RECIPIENT ORGANIZATION Cement Association of Canada 502 350 Sparks Street Ottawa, ON, K1R 7S8 Phone: (613) 236 9471 .