1、Designation: C 1355/C 1355M 96 (Reapproved 2006)Standard Specification forGlass Fiber Reinforced Gypsum Composites1This standard is issued under the fixed designation C 1355/C 1355M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision,
2、the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers glass fiber reinforced gypsum(GRG) composites having minimum properties and qua
3、litysuitable to allow the production of GRG parts for non-loadingbearing, thin section, ornamental shapes for architecturalembellishment of interior building construction.1.2 The values stated in either inch-pound units or SI(metric) are to be regarded separately as standard. Within thetext, the SI
4、units are shown in brackets. The values stated ineach system shall be independent of the other. Values from thetwo systems shall not be combined.1.3 The text of this standard references footnotes whichprovide explanatory material. These footnotes shall not beconsidered as requirements of the standar
5、d.2. Referenced Documents2.1 ASTM Standards:2C11 Terminology Relating to Gypsum and Related Build-ing Materials and SystemsC 472 Test Methods for Physical Testing of Gypsum, Gyp-sum Plasters and Gypsum ConcreteC 473 Test Methods for Physical Testing of Gypsum PanelProductsC 947 Test Method for Flexu
6、ral Properties of Thin-SectionGlass-Fiber-Reinforced Concrete (Using Simple BeamWith Third-Point Loading)D 256 Test Methods for Determining the Izod PendulumImpact Resistance of PlasticsD 578 Specification for Glass Fiber StrandsD 696 Test Method for Coefficient of Linear Thermal Ex-pansion of Plast
7、ics Between 30C and 30C with aVitreous Silica DilatometerD 2583 Test Method for Indentation Hardness of RigidPlastics by Means of a Barcol ImpressorE84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE 136 Test Method for Behavior of Materials in a VerticalTube Furnace at 750C3.
8、Terminology3.1 Definitions: Definitions of terms shall be in accordancewith Terminology C11.3.2 Definitions of Terms Specific to This Standard:3.2.1 GRG composite, na thin section laminate madefrom the combination of alpha gypsum cement, glass fiber,additives and water.3.2.2 GRG part, nan individual
9、 molded component usedas architectural embellishment.4. Materials and Manufacture4.1 Materials:4.1.1 Alpha Gypsum CementAlpha-calcium sulfatehemihydrate-plaster which is noncombustible, has a low waterdemand, neutral (pH) or low alkalinity, and a purity of not lessthan 90 % by weight of CaSO42H2O.4.
10、1.2 “E” Glass FiberChopped glass fiber strands orcontinuous strand mats of calcia-alumina silicate glasses con-forming to Specification D 578.4.1.3 WaterPotable water.4.1.4 AdditivesIn accordance with the alpha gypsum ce-ment manufacturers specifications.4.2 Manufacturers Certification of Raw Materi
11、als:4.2.1 Alpha Gypsum CementEach lot of alpha gypsumcement shall be certified to be in compliance with 4.1 and 5.1.4.2.2 Glass Fiber ReinforcementEach lot of glass fiberreinforcement shall be certified to be in compliance withSpecification D 578.4.3 Composite Preparation:4.3.1 Prepare a flat, recta
12、ngular composite of sufficient sizeto obtain specimens required in 5.2. The composite preparedshall be the same formula as the intended GRG part.5. Mechanical Properties5.1 Neat Alpha Gypsum Cement:1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Mate
13、rials and Systems and is the direct responsibilityof Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products.Current edition approved May 1, 2006. Published May 2006. Originallyapproved in 1996. Last previous addition approved in 2001 as C 1355/C 1355M 96(2001).2For referenced AST
14、M 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshoho
15、cken, PA 19428-2959, United States.5.1.1 Normal Consistency shall be not more than 30 whentested in accordance with Test Methods C 472.5.1.2 Compressive Strength shall be not less than 6000 psi(41.4 MPa) when tested in accordance with Test MethodsC 472.5.1.3 Hardness shall be not less than 33 Barcol
16、 when testedin accordance with Test Method D 2583.5.2 Composite:5.2.1 Specimen Preparation5.2.1.1 Flexural StrengthAverage Flexural Yield (FY)shall be not less than 1200 psi (8.3 MPa) and an averageFlexural Ultimate (FU) shall be not less than 2500 psi (17.2MPa) when tested in accordance with Test M
17、ethod C 947,using a crosshead speed of 0.08 in./min (2 mm/min). Speci-mens shall be conditioned to a constant weight in accordancewith Test Methods C 473.5.2.1.2 Impact ResistanceAverage impact resistance shallbe not less than 3 ft-lb (4 j) when tested in accordance withTestMethods D 256, Test Metho
18、d A (Izod-unnotched method).5.2.1.3 HardnessAverage hardness shall be not less than50 Barcol when tested in accordance with Test MethodsD 2583. Specimens shall be conditioned according to TestMethods C 473.5.2.1.4 Coeffcient of Linear Thermal ExpansionCoefficient of linear thermal expansion shall be
19、 not more than11.1 3 106in./in. F (20.0 3 106mm/mm C) when tested inaccordance with Test Method D 696.5.2.1.5 Humidified DeflectionAverage humidified deflec-tion shall be not more than18 in. (3 mm) when tested on a316in. specimen (5 mm) in accordance with Test Methods C 473.5.2.1.6 Surface Burning C
20、haracteristicsFlame spread in-dex shall be 0 and smoke developed index shall be less than 10when tested in accordance with Test Method E84.5.2.1.7 Behavior at 750 CShall pass all criteria whentested in accordance with Test Method E 136.5.2.1.8 Nail Pull ResistanceShall be not less than 110 lbf(489 N
21、) when tested on a316 in. specimen (5 mm) inaccordance with Test Methods C 473 (Method B).6. Samples Taken at the Point of Manufacture6.1 When specified by the purchase agreement, samples ofthe GRG composite shall be taken at the place of manufactureand tested for compliance with 5.2.7. Number of Te
22、sts and Retests7.1 The number of tests and type of tests to be performedshall be part of the purchase agreement. Data from prior testsshowing compliance with Section 5 are permitted to besupplied by the producer showing compliance with the speci-fied requirements.8. Inspection8.1 Inspection of the G
23、RG composite shall be agreed uponbetween the purchaser and the producer or the supplier as partof the purchase agreement.9. Rejection and Rehearing9.1 GRG composite that fails to conform to the require-ments of this specification shall be reported to the producer orthe supplier promptly and in writi
24、ng. In case of dissatisfactionwith the results of the test, the producer or supplier, shall bepermitted to make a claim for a hearing to retest.10. Certification10.1 When specified in the purchase agreement, a produc-ers or suppliers report certifying that the GRG composite is incompliance with this
25、 specification, shall be furnished at thetime of shipment.11. Quality Assurance11.1 Testing for compliance with this specification is re-quired whenever glass fiber reinforced gypsum formulae areinitially established.11.2 Additional testing for compliance with this specifica-tion is required wheneve
26、r constituent materials are added ordeleted.11.3 Each producers test specimens shall be representativeof actual production procedures and materials.12. Keywords12.1 alpha gypsum cement; glass fiber reinforced gypsum;glass fiber reinforced gypsum composite; GRG; GRGcompositeASTM International takes n
27、o position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this 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 respon
28、sibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed
29、to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, 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 ad
30、dress 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).C 1355/C 1355M 96 (2006)2
