n Journal of the South African Institution of Civil Engineering = Joernaal van die Suid-Afrikaanse Instituut van Siviele Ingenieurswese - The achievement of uniformity of straining during concrete cube testing in South Africa : technical paper




The need for checking on the extent of non-uniform straining of concrete cubes by testing machines in South Africa is reviewed. The magnitude of the effect of non-uniform straining on apparent cube strength is reported. The existing 'strain column' method for preventing non-uniform straining by testing machines is compared to a proposed new procedure in which the amount of strain non-uniformity that occurs in the course of normal cube testing is measured, then the effect it has had on the cube's strength is determined.


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