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Technical Service Center
Materials Engineering and Research Lab

MERL Partner: The University of Colorado at Denver


In 1940, the Portland Cement Association (PCA) and the Bureau of Reclamation (Reclamation) Materials Engineering and Research Laboratory, Denver, Colorado, formed a partnership to study the long term behavior of 27 different types of cement in concrete under service conditions. A parapet wall containing three or four test panels of each cement was constructed along the upstream bank at Green Mountain Dam, Big Thompson Project, Colorado. This project resumed the study of the durability of various concrete mix designs after fifty years of environmental exposure. After completion of a visual inspection and non-destructive testing of all panels, fourteen cements were selected for coring and laboratory testing. Cored samples were tested for static compressive strength, dynamic compressive strength, splitting tensile strength, cyclic (non-linear) compressive strength, modulus of elasticity, sonic modulus, Poisson's ratio, and unit weight.

For more information about this project, please contact Dr. Bill Kepler.

The pictures are of panels that were tested from the parapet wall.

Panel from the parapet wall that was tested
Panel from the parapet wall that was tested