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FACTS ABOUT CEMENT:
There are about 70 varieties of cement and available in powder, paste and liquid form but we are only concerned here with constructional cement commonly known as Portland Cement. (Portland is the town in South England where cement was originally made. Portland (constructional) Cement is a fine powder mixture of various minerals. It is produced by mixing calcareous minerals such as chalk, limestone containing silica and alumina and heating it to 1450 deg C when it cools a clinker is formed. This clinker is then finely ground and mixed with small quantity 3-5% of gypsum which has calcium sulphate in it. The amount of gypsum controls the physical properties of the eventual concrete. Sometimes very minute quantities of pigments are also added. Cement producing processes do however vary
TYPES OF CEMENT:
This is not a comprehensive list.
Aluminous Cement
Anchoring Cement
Asbestos Cement
Asphalt Cement
Bituminous Cement
Clay Cements
Coal tar Cement
High Alumina Cement
Hydraulic Cement
Magnesia Cement
Non-Toxic Cement |
Magnesium Cement
Magnesium Oxychloride Cement
Oil well Cement
Ordinary Portland Cement (OPC)
Pozzolana Cement
Quick Setting Cement
Rapid Setting Cement
Refractory Cement
Slag Cement
Sulphate Resisting Cement
Super-sulphate Cement
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AENOR: |
Asociacion Espanola Normalization Certificacion |
SPAIN |
AFNOR |
Francaise de normalisation Association |
FRANCE |
ASTM |
American Society for testing & materials |
USA |
BSI |
British Standards Institution |
UK |
CEN |
Comite Europeen de Normalisation |
EU |
DIN |
Deitsches Institut fur Normung |
Germany |
JSA |
Japanese Standards Association |
Japan |
SABS |
South African Building |
S. Africa |
UNI-CEI |
Enti Italiani di Normazione |
Italy |
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- China, India, Indonesia, Iran, Russia & Ukraine Other CIS countries, Turkey, USA
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