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Unformatted text preview: Slump of H yd raulic-Cement Concrete
ASTM C-143 Tim Boyer CM 442 P re-L ab Pu rpose
The purpose of this lab is to provide a standard method of determining the slump of hydraulic-cement concrete, either in the lab or in the field Equipment
Mold made of metal not readily attacked by cement paste; not thinner than 0.060in; be in the form of the lateral surface of the frustum of a cone with a base diameter of 8in and top diameter of 4in and height of 12in Tamping Rod round straight rod about 24in in length; both ends hemispherical P rocedure
Dampen mold and place on f lat, moist, nonabsorbent, r igid surface Hold in place by standing on to foot pieces Fill mold in three layers, each about 1/3 of volume Rob each layer with 25 strokes with tamping rod When filling top layer, heap concrete above the mold then rod Strike off excess using rod Immediately remove mold by raising straight up Immediately measure slump as the difference between the top of the mold and the displaced center of surface Procedure should be completed within 2.5 min Post-L ab Test Conditions
Test Conditions were normal for this procedure. Results
Slump: 1.5 in Comments
The procedure was followed as wri t ten 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.
- Spring '08