ASTM_C_1194_-_03_2011.pdf

Designation:C119403(Reapproved 2011)Standard Test Method forCompressive Strength of Architectural Cast Stone1This standard is issued under the fixed designation C1194;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the sampling,preparation ofspecimens,and determination of the compressive strength ofarchitectural cast stone.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C42/C42M Test Method for Obtaining and Testing DrilledCores and Sawed Beams of ConcreteC109/C109M Test Method for Compressive Strength ofHydraulic Cement Mortars(Using 2-in.or 50-mm CubeSpecimens)C617 Practice for Capping Cylindrical Concrete Specimens3.Terminology3.1 Definitions:3.1.1 cast stone,nan architectural precast concrete build-ing unit intended to simulate natural cut stone.4.Significance and Use4.1 This test method is to be used in determining thecompressive strength of cast stone.Compressive strength isone measure of resistance of cast stone to weathering andstructural stress.5.Apparatus5.1 Testing MachineThe testing machine shall conform tothe requirements prescribed in Test Method C109/C109Munless otherwise indicated therein.6.Sampling6.1 Select the sample to represent the cast stone underconsideration.The sample may be selected by the purchaser orhis authorized representative from each 500 ft3(14 m3)of caststone.Select a sample of adequate size to permit the prepara-tion of three compression test specimens.7.Test Specimens7.1 For compression tests,take three specimens from eachsample.Cut specimens from the finished surface of the sampleto consist of one surface intended to be exposed to view andfive saw-cut surfaces,except for faced cast stone,cut speci-mens through the faced surface to consist of approximatelyequal parts of the facing material and the backup material.7.2 Cut test specimens from the sample with saws.The testspecimens shall be 2-in.(50.8-mm)or 50-mm cubes.Theallowable size tolerance of the cubes shall be 618in.(3.2 mm).7.3 Measure the top and bottom of the bearing surfaces ofthe test specimens to 0.01 in.(0.25 mm)and average the twobearing areas to obtain the compression area.8.Conditioning8.1 For this test,oven dry specimens at a temperature of 100to 110C(212 to 230F)until the loss in mass is not more than0.1%in 24 h of drying.Remove from the oven and allow tocool in room temperature for 4 to 6 h before capping.9.Specimen Preparation9.1 Cap each specimen,after drying,using equipment,materials,and procedures that conform to those specified inPractice C617.Capping material is required that will exceedthe compressive strength of the tested cubes.Form the cap byspreading the capping material upon a capping plate andpressing the specimen firmly on it.Make the cap as thin aspossible but not to exceed332in.(2.4 mm).Caps must beallowed to harden a minimum of 16 hours prior to testing.1This test method is under the jurisdiction of ASTM Committee C27 on PrecastConcrete Products and is the direct responsibility of Subcommittee C27.20 onArchitectural and Structural Products.Current edition approved May 1,2011.Published June 2011.Originallypublished in 1991.Last previous edition approved in 2003 as C1194 03.DOI:10.1520/C1194-03R11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 10.Procedure10.1 Apply load through a spherical bearing block placed ontop of the specimen in a vertical testing machine.The loadingof homogenous specimens shall be parallel to the castingdirection and of faced specimens shall be normal to theposition in which the cast stone is laid in the wall(Fig.1).Thearea of the bearing block shall be the same,or slightly larger,than that of the test specimen.10.2 Center the specimen in the testing machine and applythe initial load at a rate which will permit hand adjustment ofthe contact plate on the specimen.10.3 Apply load uniformly and without shock.Loadingshall be at a rate of 200 to 350 psi/s(1380 to 2415 kPa/s)or fortesting machines of screw type,the moving he