ASTM D7957 D7957M-2017 2500 Standard Specification for Solid Round Glass Fiber Reinforced Polymer Bars for Concrete Reinforcement《钢筋混凝土用实心圆玻璃纤维增强聚合物杆的标准规格》.pdf
《ASTM D7957 D7957M-2017 2500 Standard Specification for Solid Round Glass Fiber Reinforced Polymer Bars for Concrete Reinforcement《钢筋混凝土用实心圆玻璃纤维增强聚合物杆的标准规格》.pdf》由会员分享,可在线阅读,更多相关《ASTM D7957 D7957M-2017 2500 Standard Specification for Solid Round Glass Fiber Reinforced Polymer Bars for Concrete Reinforcement《钢筋混凝土用实心圆玻璃纤维增强聚合物杆的标准规格》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D7957/D7957M 17Standard Specification forSolid Round Glass Fiber Reinforced Polymer Bars forConcrete Reinforcement1This standard is issued under the fixed designation D7957/D7957M; the number immediately following the designation indicates theyear of original adoption or, in the case of
2、 revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers glass fiber reinforced polymer(GFRP) bars, provided in cut lengths an
3、d bent shapes andhaving an external surface enhancement for concrete reinforce-ment. Bars covered by this specification shall meet the require-ments for geometric, material, mechanical, and physical prop-erties described herein.1.2 Bars produced according to this standard are qualifiedusing the test
4、 methods and must meet the requirements givenby Table 1. Quality control and certification of production lotsof bars are completed using the test methods and must meet therequirements given in Table 2.1.3 The text of this specification references notes andfootnotes which provide explanatory material
5、. These notes andfootnotes (excluding those in tables) shall not be considered asrequirements of the specification.1.4 The following FRP materials are not covered by thisspecification:1.4.1 Bars made of more than one load-bearing fiber type(that is, hybrid FRP).1.4.2 Bars having no external surface
6、enhancement (that is,plain or smooth bars, or dowels).1.4.3 Bars with geometries other than solid, round crosssections.1.4.4 Pre-manufactured grids and gratings made with FRPmaterials.1.5 This specification is applicable for either SI (as Speci-fication D7957M) or inch-pound units (as SpecificationD
7、7957).1.6 The values stated in either inch-pound units or SI unitsare to be regarded as standard. Within the text, the inch-poundunits are shown in brackets. The values stated in each systemare not exact equivalents; therefore, each system shall be usedindependently of the other. Combining values fr
8、om the twosystems may result in nonconformance with the specification.1.7 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, health and environmental practices an
9、d deter-mine the applicability of regulatory limitations prior to use.1.8 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-
10、mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete ReinforcementC904 Terminology Relating to Chemical-Resistant Nonme-tallic MaterialsD5
11、70 Test Method for Water Absorption of PlasticsD792 Test Methods for Density and Specific Gravity (Rela-tive Density) of Plastics by DisplacementD2584 Test Method for Ignition Loss of Cured ReinforcedResinsD3171 Test Methods for Constituent Content of CompositeMaterialsD3878 Terminology for Composit
12、e MaterialsD7205/D7205M Test Method for Tensile Properties of FiberReinforced Polymer Matrix Composite BarsD7617/D7617M Test Method for Transverse Shear Strengthof Fiber-reinforced Polymer Matrix Composite BarsD7705/D7705M Test Method for Alkali Resistance of FiberReinforced Polymer (FRP) Matrix Com
13、posite Bars usedin Concrete ConstructionD7913/D7913M Test Method for Bond Strength of Fiber-Reinforced Polymer Matrix Composite Bars to Concreteby Pullout TestingD7914/D7914M Test Method for Strength of Fiber Rein-forced Polymer (FRP) Bent Bars in Bend Locations1This specification is under the juris
14、diction of ASTM Committee D30 onComposite Materials and is the direct responsibility of Subcommittee D30.10 onComposites for Civil Structures.Current edition approved Aug. 1, 2017. Published August 2017. Originallyapproved in 2017. DOI: 10.1520/D7957_D7957M-17.2For referenced ASTM standards, visit t
15、he 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.
16、United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barr
17、iers to Trade (TBT) Committee.1E1356 Test Method for Assignment of the Glass TransitionTemperatures by Differential Scanning CalorimetryE2160 Test Method for Heat of Reaction of ThermallyReactive Materials by Differential Scanning Calorimetry3. Terminology3.1 Definitions:3.1.1 Terminology C904 defin
18、es terms relating to chemical-resistant nonmetallic materials. Terminology D3878 definesterms relating to high-modulus fibers and their composites.3.2 Definitions of Terms Specific to This Standard:3.2.1 bar, na straight or bent element with a solid, roundcross section in the straight portion, havin
19、g surface enhance-ment that intends to provide mechanical interlock with con-crete.3.2.2 bend angle, nthe intentional deviation of a portionof a bar from the main axis of the bar, measured in degrees.3.2.3 bend diameter, nthe inside diameter of a bent bar, asprovided in Table 4.3.2.4 commercial grad
20、e material, na material formulatedfor and used in industrial (not consumer) applications.3.2.5 guaranteed property, na characteristic value pro-vided by the manufacturer less than or equal to the mean minusthree standard deviations of the samples tested according to aspecified method.3.2.6 mean prop
21、erty, na value provided by the manufac-turer less than or equal to the mean of the samples testedaccording to a specified method.TABLE 1 Property Limits and Test Methods for QualificationAProperty Limit Test MethodMean Glass Transition Temperature Midpoint temperature $100 C 212 F ASTM E1356Mean Deg
22、ree of Cure $95 % ASTM E2160Mean Measured Cross-Sectional Area Table 3 ASTM D7205/D7205M, subsection 11.2.5.1GuaranteedBUltimate Tensile Force Table 3 ASTM D7205/D7205MMean Tensile Modulus of Elasticity $44,800 MPa 6 500 000 psi ASTM D7205/D7205MMean Ultimate Tensile Strain $1.1 % ASTM D7205/D7205MG
23、uaranteedBTransverse Shear Strength $131 MPa 19 000 psi ASTM D7617/D7617MGuaranteedBBond Strength $7.6 MPa 1100 psi ASTM D7913/D7913MMean Moisture Absorption to Saturation #1.0 % to saturation at 50 C 122 F ASTM D570, subsection 7.4Mean Alkaline Resistance$80 % of initial mean ultimate tensile force
24、 following90 days at 60 C 140 FASTM D7705/D7705M, Procedure AGuaranteedBUltimate Tensile Force of Bent Portionof Bar$60 % of the values in Table 3 ASTM D7914/D7914MAFor the determination of the mean and guaranteed properties, at least 24 samples shall be obtained in groups of eight or more from thre
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