ASTM C143/C143M-10 pdf free. Standard Test Method for Slump of Hydraulic-Cement Concrete.
ASTM C143/C143M covers determination of slump of hydraulic-cement concrete, both in the laboratory and in the field.
The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
3. Summary of Test Method
3.1 A sample of freshly mixed concrete is placed and compacted by rodding in a mold shaped as the frustum of a cone. The mold is raised, and the concrete allowed to subside. The vertical distance between the original and displaced position of the center of the top surface of the concrete is measured and reported as the slump of the concrete.
4. Significance and Use
4.1 This test method is intended to provide the user with a procedure to determine slump of plastic hydraulic-cement concretes.
6. Sample
6.1 The sample of concrete from which test specimens are made shall be representative of the entire batch. It shall be obtained in accordance with Practice C 172.
7. Procedure
7.1 Dampen the mold and place it on a rigid, flat, level, moist, nonabsorbent surface, free of vibration, and that is large enough to contain all of the slumped concrete. It shall be held tIrmly in place during filling and perimeter cleaning by the operator standing on the two foot pieces or by a clamping arrangement to a base plate as described in 5. I. From the sample of concrete obtained in accordance with Section 6, immediately tIll the mold in three layers. each approximately one third the volume of the mold (See Note 5). Place the concrete in the mold using the scoop described in 5.4. Move the scoop around the perimeter of the mold opening to ensure an even distribution of the concrete with minimal segregation.ASTM C143/C143M-10 pdf free download.