ASTM C39 - Make no adjustment to rate of movement while the...

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Compressive Strength of Cylindrical Concrete Specimens ASTM C-39 Tim Boyer CM 442 Pre-Lab Purpose The purpose of this lab is to provide a standard method of determining the compressive strength of cylindrical concrete specimens for concrete having a unit weight greater than 50 lb/ft 3 . Equipment Testing Machine – should apply continuous load Procedure Tests should conducted as soon as practicable after removal from moist storage Wipe the bear faces clean and place specimen on lower block Align the axis and the center of thrust of the spherically seated block Adjust indicator to read 0 Apply load continuously, without shock A higher rate is allowed before 50% of anticipated load
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Unformatted text preview: Make no adjustment to rate of movement while the specimen is yielding rapidly immediately before failing Apply load until specimen fails and record maximum load carried Note type of failure and appearance of concrete = Compressive Strength Maximum LoadCross Sectional Area Post-Lab Test Conditions The test conditions for this procedure were normal. Results Average Diameter of Cylinder: 6.0315in Total Load: 116010lb Machine measured compressive strength: 4100psi Calculated compressive strength: 4060psi Comments The procedure was followed as written and everything proceeded normally....
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This note was uploaded on 04/29/2008 for the course CE 320 taught by Professor Mckinney during the Spring '08 term at Rose-Hulman.

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ASTM C39 - Make no adjustment to rate of movement while the...

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