Method and apparatus for supporting cylindrical concrete samples for testing
AssigneeM. A. Industries, Inc.
InventorsBobbie D. Peacock, John N. Mushovic, Roger D. Geyer
Life of this patent
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Abstract
A method and apparatus for supporting concrete testing samples comprising providing closely machined aluminum, steel, or suitable molded plastic caps for the respective circular ends of a cylindrical concrete testing sample and removable, reusable flanged molded elastomeric pads which are inserted in a recessed cavity in each cap prior to positioning of the cap on the respective end of the concrete cylinder. Each pad has a space between the bottom and the side to provide at least an equivalency between sulfur capped cylinder compression load strengths and those generated by the above system over the wide range of compression load values normally occurring in this particular test.
Claims17
In a flexible elastomeric pad for insertion in respective cavities of each of the opposed caps which are fitted at opposite ends of a concrete test sample, comprising:
- a pad bottom surrounded by a peripheral side wall extending upwardly therefrom defining an open cavity in said pad for receiving one end of the concrete sample therein, the top of the pad bottom which receives the concrete flat end thereagainst being recessed and below the upper edge of the outer side wall whereby the side wall extends around the end of the concrete sample, said overall width and dimension of said pad being such that the pad is tightly fitted into the cavity of the cap so that the outside of the side wall is in contact with the inside of the cap, a recessed top on the bottom of said pad whereby the top of the bottom is below the side wall, said bottom being spaced from said side wall defining a depression between said side wall and said bottom, the pad bottom and end of the cylinder being about the same size but the inside of the cap being larger than the pad bottom.
In a flexible elastomeric pad for insertion in respective cavities of each of the opposed caps which are fitted at opposite ends of a concrete test sample, comprising:
- a pad bottom surrounded by a peripheral side wall extending upwardly therefrom defining an open cavity in said pad for receiving one end of the concrete sample therein, the top of the pad bottom which receives the concrete flat end thereagainst being recessed and below the upper edge of the outer side wall whereby the side wall extends around the end of the concrete sample, said overall width and dimension of said pad being such that the pad is tightly fitted into the cavity of the cap so that the outside of the side wall is in contact with the inside of the cap, said pad having the following properties:
- ______________________________________ ASTM ______________________________________ Tensile Strength 1,000-5,000 psi D412 Hardness 52-60 Shore A D2240 Split Tear >15 pli D1938 Elongation At least 200% D412 Rebound Min. 15-50% Permanent Set <15% D412 ______________________________________
Dependencies are inferred from the claim text.