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Difficulty Beginner Intermediate Advanced. Explore Documents. Astm C Uploaded by dana setiawan. Did you find this document useful? Is this content inappropriate? Report this Document. Flag for inappropriate content. Download now. Related titles. Carousel Previous Carousel Next. Examples of Applicable Steels for Typical Products. Jump to Page. Search inside document. Approved November 1, 1 Revised 5. Audrey Schwartz.
Amanda Ariesta Aprilia. Jorge Lewis Rodriguez Santos. Esteban Mora. Moatz Hamed. Muhammad Nauman. Zega Chris. Jorge R. Vega C. John Errol Saldevar Marcos. Shivam Shekhar. Juan Ch. Tariq Khan. ASTM C Carlos Guillermo Somoza Alvarenga. Vijayakrishna Singamsetti. Luis Angel Gutierrez.
More From dana setiawan. Shofihatul Maula. La longitud del instrumento debe ser al menos de 12 in. Muestra 6. Procedimiento 7. Coloque el concreto en el molde usando la pala descrita en 5. Compacte por varillado la capa inferior atravesando toda su profundidad. Luego de que se haya compactado por varillado la capa superior, enrase la superficie del concreto por medio de un movimiento de regleado y rolido de la varilla compactadora.
Levante el molde a una distancia de 12 in. Informe 8. Todos los ensayos en 3 rangos diferentes de asentamiento, desde 1. El concreto fue entregado y ensayado a un asentamiento bajo, con agua agregada entonces y mezclada con el concreto restante para producir independientemente concreto con asentamiento moderado, y finalmente concreto con asentamiento alto.
Se realizaron un total de ensayos de asentamiento. Palabras clave Se pueden obtener permisos para fotocopiar la norma a partir del sitio web de la ASTM www. If the coarse aggregate is larger than in.
Current edition approved Nov. Published November Originally approved in NOTE 2Concretes having slumps less than 12 in. Caution should be exercised in interpreting such results. United States. Apparatus 5.
The mold shall be sufficiently rigid to maintain the specified dimensions and tolerances during use, resistant to impact forces, and shall be non-absorbent. Metal molds shall have an average thickness of not less than 0. Plastic molds shall be ABS plastic or equivalent Note 3 with a minimum average wall thickness of 0. The manufacturer or supplier shall certify the materials used in mold construction are in compliance with the requirements of this test method.
The mold shall be in the form of the lateral surface of the frustum of a cone with the base 8 in. Individual diameters and heights shall be within in. The base and the top shall be open and parallel to each other and at right angles to the axis of the cone. The mold shall be provided with foot pieces and handles similar to those shown in Fig.
The mold shall be constructed without a seam. The interior of the mold shall be relatively smooth and free from projections.
The mold shall be free from dents, deformation, or adhered mortar. A mold which clamps to a nonabsorbent base plate is acceptable instead of the one illustrated, provided the clamping arrangement is such that it. If the test results differ by more than 0. The length of the tamping rod shall be at least 4 in. The rod shall have the tamping end or both ends rounded to a hemispherical tip of the same diameter as the rod. NOTE 4A rod length of 16 in. The instruement length shall be at least 12 in.
Sample 6. It shall be obtained in accordance with Practice C It shall be held firmly 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. From the sample of concrete obtained in accordance with Section 6, immediately fill 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.
Move the scoop around the perimeter of the mold opening to ensure an even distribution of the concrete with minimal segregation. A double dosage of a chemical retarder was used in an attempt to minimize slump losses and maintain workability of the concrete.
Concrete temperatures ranged from 86 to 93 F [30 to 34 C]. Slump losses averaged 0. Testing was performed alternately using metal and plastic molds, which were determined to produce comparable results. Precision data thus applies to both metal and plastic molds. A total of slump tests were performed. The precision values shown in inch-pound units are conversions from the millimetre measurements, which were recorded to the nearest 1 mm.
The reported results for the replicate readings apply to tests conducted by the same operator performing successive tests, one immediately following the other. Acceptable results of two properly conducted tests by the same operator on the same material Note 7 will not differ from each other by more than the d2s value of the last column of Table 1 for the appropriate slump value and single-operator precision.
The reported results for the replicate readings apply to tests conducted by different operators from different laboratories performing tests less than 4 min apart. Therefore, acceptable results of two properly conducted slump tests on the same material Note 7 by two different laboratories will not differ from each other by more than the d2s value of the last column of Table 1 for the appropriate slump value and multilaboratory precision.
NOTE 5One third of the volume of the slump mold fills it to a depth of in. For the bottom layer, this will necessitate inclining the rod slightly and making approximately half of the strokes near the perimeter, and then progressing with vertical strokes spirally toward the center.
Rod the bottom layer throughout its depth. For each upper layer, allow the rod to penetrate through the layer being rodded and into the layer below approximately 1 in. If the rodding operation results in subsidence of the concrete below the top edge of the mold, add additional concrete to keep an excess of concrete above the top of the mold at all times. After the top layer has been rodded, strike off the surface of the concrete by means of a screeding and rolling motion of the tamping rod.
Continue to hold the mold down firmly and remove concrete from the area surrounding the base of the mold to preclude interference with the movement of slumping concrete.
Remove the mold immediately from the concrete by raising it carefully in a vertical direction. Raise the mold a distance of 12 in.
Complete the entire test from the start of the filling through removal of the mold without interruption and complete it within an elapsed time of min.
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