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    ASTM C39/C39M-09a

    Historical Standard: Método de Ensayo Normalizado para Resistencia a la Compresión de Especímenes Cilíndricos de Concreto


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    Significance and Use

    Care must be exercised in the interpretation of the significance of compressive strength determinations by this test method since strength is not a fundamental or intrinsic property of concrete made from given materials. Values obtained will depend on the size and shape of the specimen, batching, mixing procedures, the methods of sampling, molding, and fabrication and the age, temperature, and moisture conditions during curing.

    This test method is used to determine compressive strength of cylindrical specimens prepared and cured in accordance with Practices C31/C31M, C192/C192M, C617, and C1231/C1231M and Test Methods C42/C42M and C873.

    The results of this test method are used as a basis for quality control of concrete proportioning, mixing, and placing operations; determination of compliance with specifications; control for evaluating effectiveness of admixtures; and similar uses.

    The individual who tests concrete cylinders for acceptance testing shall meet the concrete laboratory technician requirements of Practice C1077, including an examination requiring performance demonstration that is evaluated by an independent examiner.

    Note 1—Certification equivalent to the minimum guidelines for ACI Concrete Laboratory Technician, Level I or ACI Concrete Strength Testing Technician will satisfy this requirement.

    1. Alcance

    1.1 Este método de ensayo trata sobre la determinación de la resistencia a compresión de especímenes cilíndricos de concreto, tales como cilindros moldeados y núcleos perforados. Se encuentra limitado al concreto que tiene un densidad mayor que 800 kg/m3 [50 lb/ft3].

    1.2 Los valores indicados en unidades SI o en unidades pulgada-libra deben ser considerados como los estándares. Las unidades pulgada-libra se muestran entre corchetes. Los valores indicados en cada sistema no son exactamente equivalentes; por eso, cada sistema debe ser utilizado independientemente del otro. La combinación de valores de los dos sistemas puederesultar en una no conformidad con esta especificación.

    1.3 Esta norma no pretende tener en cuenta todo lo relativo a seguridad. Es responsabilidad del usuario de esta norma establecer prácticas apropiadas de seguridad y salud y determinar la aplicabilidad de las limitaciones regulatorias previo al uso. (Peligro—Deben ser provistos los medios para contener los fragmentos de concreto durante la rotura repentina de especímenes. La tendencia a una rotura repentina se incrementa con el aumento de la resistencia del concreto y es más probable cuando la máquina de ensayo es relativamente flexible. Las precauciones de seguridad dadas en el Manual of Aggregate and Concrete Testing son recomendadas.)

    1.4 El texto de las notas de referencia de esta norma proveen material explicativo. Estas notas no serán consideradas como requerimientos de la norma.

    2. Documentos Citados

    C1077 Practice for Agencies Testing Concrete and Concrete Aggregates for Use in Construction and Criteria for Testing Agency Evaluation

    C1176/C1176M Practice for Making Roller-Compacted Concrete in Cylinder Molds Using a Vibrating Table

    C1231/C1231M Practice for Use of Unbonded Caps in Determination of Compressive Strength of Hardened Cylindrical Concrete Specimens

    C125 Terminology Relating to Concrete and Concrete Aggregates

    C1435/C1435M Practice for Molding Roller-Compacted Concrete in Cylinder Molds Using a Vibrating Hammer

    C1604/C1604M Test Method for Obtaining and Testing Drilled Cores of Shotcrete

    C192/C192M Practice for Making and Curing Concrete Test Specimens in the Laboratory

    C31/C31M Practice for Making and Curing Concrete Test Specimens in the Field

    C42/C42M Test Method for Obtaining and Testing Drilled Cores and Sawed Beams of Concrete

    C617/C617M Practice for Capping Cylindrical Concrete Specimens

    C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials

    C873/C873M Test Method for Compressive Strength of Concrete Cylinders Cast in Place in Cylindrical Molds

    C943 Practice for Making Test Cylinders and Prisms for Determining Strength and Density of Preplaced-Aggregate Concrete in the Laboratory

    E18 Test Methods for Rockwell Hardness of Metallic Materials

    E4 Practices for Force Verification of Testing Machines

    E74 Practices for Calibration and Verification for Force-Measuring Instruments

    R0030 Manual of Aggregate and Concrete Testing