c 496 método de prueba estándar para la tracción indirecta de fuerza de especímenes cilíndricos...

8/10/2019 C 496 Mtodo de prueba estndar para la traccin indirecta de fuerza de Especmenes Cilndricos de Concreto.doc

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This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. n all cases only the current versionof the standard as published by ASTM is to be considered the official document.

Designation: C 496/C 496M 04

Standard Test Method forSplitting Tensile Strength of Cylindrical ConcreteSpecimens1

This standard is issued under the fi!ed designation " #$%&" #$%M' the number immediately following the designation indicates the

year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last

reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

This standard has been approved for use by agencies of the Department of Defense.

1. Scope*

1.1 This test method covers the determination of the splitting tensile strength of cylindrical concrete specimens, such as molded

cylinders and drilled cores. *+T 1-or methods of molding cylindrical concrete specimens, see /ractice " 1$0 and /ractice

" 1. or methods of obtaining drilled cores see Test Method " #0.

1.0 The values stated in either inch2pound or S units are to be regarded separately as standard. The S units are shown inbrac3ets. The values stated in each system may not be e!act equivalents' therefore, each system shall be used independently of

the othe r . "ombining values from the two systems may result in nonconformance with the standard.

1. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory

limitations prior to use.1.# The te!t of this standard references notes that provide e!planatory material. These notes shall not be considered as

requirements of the standard.

1 This test method is under the 4urisdiction of ASTM "ommittee "2$ "5$ on "oncrete and "oncrete Aggregates and is the direct responsibility of Subcommittee "5$.%1

on Testing "oncrete for Strength.

"urrent edition approved 6an. 15, 1$$%. eb. 1, 055#. /ublished March 1$$%. 055#. +riginally published as " #$% 7 %0. approved in 1$%0. 8ast previous edition approved

in 1$$% as " #$% 7 $5%.

*A Summary of Changes section appears at the end of this standard.

Copyright ASTM International, 100 Barr Harbor Drive, PO Box C00, !e"t Con"hoho#$en, PA 1%&'()'%*%, +nite State"-


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2. Referenced Documents

0.1 ASTM Standards: 0

" 1&" 1M /ractice for Ma3ing and "uring "oncrete Test Specimens in the ield

" $&" $M Test Method for "ompressive Strength of "ylindrical "oncrete Specimens

" #0&" #0M Test Method for +btaining and Testing 9rilled "ores and Sawed Beams of "oncrete" 1$0&" 1$0M /ractice for Ma3ing and "uring "oncrete Test Specimens in the 8aboratory" %:5 /ractice for /reparing /recision and Bias Statements for Test Methods for "onstruction Materials

3. Summary of Test Method

.1 This test method consists of applying a diametral compressive force along the length of a cylindrical concrete specimen at

a rate that is within a prescribed range until failure occurs. This loading induces tensile stresses on the plane containing the

applied load and relatively high compressive stresses in the area immediately around the applied load. Tensile failure occursrather than compressive failure because the areas of load application are in a state of tria!ial compression, thereby allowing them

to withstand much higher compressive stresses than would be indicated by a unia!ial compressive strength test result..0 Thin, plywood bearing strips are used so that to distribute the load is applied uniformly along the length of the cylinder.

. The ma!imum load sustained by the specimen is divided by appropriate geometrical factors to obtain the splitting tensile

strength.

4. Significance and se

#.1 Splitting tensile strength is simpler to determine generally greater than direct tensile strength and lower than fle!ural

strength(modulus of rupture).

#.0 Splitting tensile strength is used in the design of structural lightweight concrete members to evaluate the shear resistance

provided by concrete in reinforced lightweight aggregate concrete members. and to determine the development length of

reinforcement.

!. Apparatus

;.1 Testing Machine-The testing machine shall conform to the requirements of Test Method " $&" $M and may be of any

a type of with sufficient capacity that will provide the rate of loading prescribed in :.;.

;.0 Supplementary earing ar or !late- f the diameter or the largest dimension of the upper bearing face or the lowerbearing bloc3 is less than the length of the cylinder to be tested, a supplementary bearing bar or plate of machined steel shall be

used. The surfaces of the bar or plate shall be machined to within % 5.551 in. (


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Standards, Eol 5#.50. volume information, refer to the standardFs 9ocument Summary page on the ASTM website.


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C 496/C 496M 9604

!"# , Detailed -lans for a S&ita'le (pparat&s for Mar)ing *nd Diameters +sed for (ligning the Specimen

!"# . ig for (ligning Concrete Cylinder and earing Strips

%. Ca&cu&ation

?.1 "alculate the splitting tensile strength of the specimen as follows

T; 0!&pld (1)

whereT H splitting tensile strength, psi (3/a),


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!"# 4 Detailed -lans for a S&ita'le (ligning ig for 6 'y 1, in# 120 'y .00 mm3 Specimen

!"# 2 Specimen -ositioned in a Testing Machine for Determination of Splitting Tensile Strength

'. Report

$.1 Geport the following information$.1.1 dentification number,$.1.0 9iameter and length, in. (m),


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$.1.? 9efects in specimen,$.1.$ Type of fracture, and$.1.15 Type of specimen.

1(. $recision and )ias

15.1 !recision-An interlaboratory study of this test method has not been performed. Available research data,

however,

suggests that the within batch coefficient of variation is ; C (see *ote ;) #) for % 1 102in. (1;0 1 5;2mm)