ASTM C1194-2003 Standard Test Method for Compressive Strength of Architectural Cast Stone《建筑铸石抗压强度的标准试验方法》.pdf

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1、Designation: C 1194 03Standard Test Method forCompressive Strength of Architectural Cast Stone1This standard is issued under the fixed designation C 1194; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A

2、 number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 sto

3、ne.1.2 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.1.3 The valu

4、es stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.2. Referenced Documents2.1 ASTM Standards:C 42 Test Method for Obtaining and Testing Drilled Coresand Sawed Beams of Concrete2C 109 Test Method for Compressive Strength of Hydraul

5、icCement Mortars3C 617 Practice for Capping Cylindrical Concrete Speci-mens23. 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

6、 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 C 109 unlessotherwise indicated therein.6. Sampling6.1 Select the s

7、ample 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 compressio

8、n 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 f

9、acing 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 618 in. (3.2 mm).7.3 Measure the top and bottom of the bearing surfaces ofthe test specimens to 0.01 i

10、n. (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

11、 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 C 617. Capping material is required that will exceedthe compressive strength of the tested cubes. Form the cap byspreading the cap

12、ping material upon a capping plate andpressing the specimen firmly on it. Make the cap as thin aspossible but not to exceed332 in. (2.4 mm). Caps must beallowed to harden a minimum of 16 hours prior to testing.10. Procedure10.1 Apply load through a spherical bearing block placed ontop of the specime

13、n 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). The1This test method is under the jurisdiction of ASTM Committee C27 on PrecastCon

14、crete Products and is the direct responsibility of Subcommittee C27.20 onArchitectural and Structural Products.Current edition approved June 10, 2003. Published August 2003. Originallypublished as C 1194 91. Last previous edition C 1194 02.2Annual Book of ASTM Standards, Vol 04.02.3Annual Book of AS

15、TM Standards, Vol 04.01.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.area 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 initi

16、al 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 head shall travel ata rate of approximately 0.05 in

17、./min (1.3 mm/min) when themachine is running idle.10.4 The compression testing machine shall have a low-range dial or a digital reading scale that shall have an accuracyof 61.0 % of the maximum load applied to the cast stonespecimens.10.5 Load specimens to failure.11. Calculations11.1 Calculate the

18、 compressive strength of each specimen asfollows:C 5 W/A (1)where:C = compressive strength of the specimen, psi (MPa),W = maximum load, lbf (N), on the specimen at failure,andA = calculated area of the uncapped bearing surface in in.2(mm2).12. Report12.1 Report the following information.12.1.1 The a

19、verage compressive strength of three specimenstaken from a single sample with the psi results rounded off tothe nearest 10 psi.12.1.2 The following information shall be reported as ap-plicable: identification of the sample, mixture proportions,compressive strength, name of the project, date of casti

20、ng, andage of sample when tested.13. Precision and Bias13.1 PrecisionThe precision of this test is similar to TestMethod C 42 for which data are not yet available. Theprecision of this test method will be stated when data becomeavailable.13.2 BiasSince there is no accepted reference materialsuitable

21、 for determining the bias of results of this test method,no statement on bias is being made.14. Keywords14.1 cast stone; compressive strengthASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this

22、 standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five year

23、s andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committ

24、ee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).FIG. 1 Loading PositionC1194032