American Concrete Institute
American Concrete Pavement Association
British Cement Association
Building Research Establishment - UK
Cement and Concrete Institute
Concrete Institute of Australia
Concrete Manufacturers' Association
Concrete Society - UK
Engineering Council of South Africa
Institute of Concrete Technology - UK
Portland Cement Association - USA
South African Bureau of Standards
South African Institute of Architects
South African Institution of Civil Engineering
Southern African Readymix Association
South African Reinforced Concrete Engineers' Association
The Concrete Centre - UK
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