ASTM D8505 - D 8505M - 25 混凝土钢筋用玄武岩和玻璃纤维增强聚合物（FRP）钢筋的标准规范

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Designation: D8505/D8505M −25

Standard Speciﬁcation for

Basalt and Glass Fiber Reinforced Polymer (FRP) Bars for

Concrete Reinforcement

This standard is issued under the ﬁxed designation D8505/D8505M; 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 (´) indicates an editorial change since the last revision or reapproval.

1. Scope

1.1 This speciﬁcation covers basalt and glass ﬁber rein-

forced polymer (BFRP and GFRP, respectively) bars, provided

in straight (longitudinal) cut lengths, of solid round cross-

section, and having a surface enhancement for internal con-

crete reinforcement applications. Bars covered by this speciﬁ-

cation shall meet the requirements for geometric, material,

mechanical, and physical properties as described herein.

1.2 Subsection 1.6 deﬁnes the type of FRP bars that are out

of the scope of this speciﬁcation.

1.3 Bars produced according to this standard are qualiﬁed

using the test methods and must meet the requirements given in

Table 1. Quality control and acceptance of production lots of

bars are completed using the test methods and must meet the

requirements given in Table 2.

1.4 The standard sizes and dimensions of FRP bars and their

number designations are given in Table 3.

1.5 The text of this speciﬁcation references notes and

footnotes which provide explanatory material. These notes and

footnotes (excluding those in tables) shall not be considered as

requirements of the speciﬁcation.

1.6 The following FRP bar materials are not covered by this

speciﬁcation:

1.6.1 Bars made of more than one load-bearing ﬁber types

or different grade ﬁbers (that is, hybrid FRP).

1.6.2 Bars made from ﬁbers other than glass or basalt.

1.6.3 Bars having no external surface enhancement (that is,

plain or smooth bars, or dowels).

1.6.4 Bars with geometries other than solid, round cross

sections.

1.6.5 Pre-manufactured grids and gratings made with FRP

materials.

1.6.6 Bent bars (that is, bars that are not made of straight,

continuous lengths).

NOTE 1—Bent bars may include stirrups and hoops. Refer Speciﬁcation

D7957/D7957M for GFRP bent bar speciﬁcations.

1.7 This speciﬁcation is applicable for either SI (as Speci-

ﬁcation D8505M) or US units (as Speciﬁcation D8505).

1.8 The values stated in either SI units or US units are to be

regarded as standard. Within the text, the US units are shown

in brackets. The values stated in each system are not exact

equivalents; therefore, each system shall be used independently

of the other. Combining values from the two systems may

result in nonconformance with the speciﬁcation.

1.9 This standard does not purport to address all of the

safety concerns, if any, associated with its use. It is the

responsibility of the user of this standard to establish appro-

priate safety, health, and environmental practices and deter-

mine the applicability of regulatory limitations prior to use.

1.10 This international standard was developed in accor-

dance with internationally recognized principles on standard-

ization established in the Decision on Principles for the

Development of International Standards, Guides and Recom-

mendations issued by the World Trade Organization Technical

Barriers to Trade (TBT) Committee.

This speciﬁcation is under the jurisdiction of ASTM Committee D30 on

Composite Materials and is the direct responsibility of Subcommittee D30.10 on

Composites for Civil Structures.

Current edition approved Nov. 1, 2025. Published November 2025. Originally

approved in 2023. Last previous edition approved in 2023 as D3531 – 23. DOI:

10.1520/D8505_D8505M-25.

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the

Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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TABLE 1 Property Limits and Test Methods for Qualiﬁcation

Property Limit Test Method

Mean Glass Transition Temperature $100 °C [212 °F] (DSC) E1356

$110 °C [230 °F] (DMA) D7028

Mean Degree of Cure $95 % E2160

Mean Measured Cross-Sectional Area Table 3 D7205/D7205M, subsection 11.2.4.1

Guaranteed

Ultimate Tensile Force Table 3

D7205/D7205M

Guaranteed Ultimate Tensile Strength Report value

Mean Tensile Modulus of Elasticity $60 000 MPa [8 700 000 psi]

Mean Tensile Modulus of Elasticity

(using measured Cross-Sectional Area) Report value

Mean Ultimate Tensile Strain $1.1 %

Mean Transverse Shear Strength $152 MPa [22 000 psi] D7617/D7617M

Mean Apparent Horizontal Shear Strength $37.9 MPa [5 500 psi] D4475

Mean Bond Strength Table 3 D7913/D7913M

Mean Moisture Absorption #0.25 % in 24 hrs. at 50 °C [122 °F], and

#1.0 % to saturation at 50 °C [122 °F] D570, subsection 7.4

Mean Alkaline Resistance

$80 % of initial mean ultimate tensile force

following 90 days at 60 °C [140 °F] D7705/D7705M, Procedure A

$75 % of initial mean ultimate tensile force

following 90 days at 60 °C [140 °F]

D7705/D7705M, Procedure B

set an initial tensile strain

equal to 3000 microstrain

For the determination of the mean and guaranteed properties, at least 24 specimens (that is, test repetitions) shall be obtained in groups of eight or more from three or

more different production lots. The mean and guaranteed properties shall satisfy the limits.

Guaranteed property is deﬁned in 3.2.2.

TABLE 2 Property Limits and Test Methods for Quality Control and Acceptance of Production Lots

Property Limit Test Method

Fiber Mass Content $70 % D2584 or D3171

Glass Transition Temperature $100 °C [212 °F] (DSC) E1356

$110 °C [230 °F] (DMA) D7028

Degree of Cure $95 % E2160

Measured Cross-Sectional Area Table 3 D7205/D7205M, subsection 11.2.4.1

Ultimate Tensile Force Table 3

D7205/D7205M

Guaranteed Ultimate Tensile Strength Report value

Mean Tensile Modulus of Elasticity $60 000 MPa [8 700 000 psi]

Mean Tensile Modulus of Elasticity

(using measured Cross-Sectional Area) Report value

Ultimate Tensile Strain $1.1 %

Mean Apparent Horizontal Shear Strength $37.9 MPa [5 500 psi] D4475

Moisture Absorption in 24 h #0.25 % in 24 hrs. at 50 °C [122 °F] D570, subsection 7.1

For the determination of each of the property limits, ﬁve random specimens (i.e. test repetitions) shall be obtained from each production lot. Each individual specimen

shall satisfy the property limits.

TABLE 3 Geometric and Mechanical Property Requirements

Bar

Designation

Number

Nominal Dimensions

Measured Cross-Sectional

Area Limits

[in.

]

Minimum

Guaranteed

Ultimate Tensile

Force

kN [kip]

Minimum

Bond Strength

MPa [psi]

Diameter

mm [in.]

Cross-Sectional

Area

[in.

]

Minimum Maximum

M6 [2] 6.3 [0.250] 32 [0.049] 30 [0.046] 55 [0.085] 33 [7.4]

9.6

[1400]

M10 [3] 9.5 [0.375] 71 [0.11] 67 [0.104] 104 [0.161] 71 [16.0]

M13 [4] 12.7 [0.500] 129 [0.20] 119 [0.185] 169 [0.263] 124 [27.9]

M16 [5] 15.9 [0.625] 199 [0.31] 186 [0.288] 251 [0.388] 181.5 [40.8]

M19 [6] 19.1 [0.750] 284 [0.44] 268 [0.415] 347 [0.539] 254.9 [57.3]

M22 [7] 22.2 [0.875] 387 [0.60] 365 [0.565] 460 [0.713] 337.2 [75.8]

M25 [8] 25.4 [1.000] 510 [0.79] 476 [0.738] 589 [0.913] 422.1 [94.9] 7.6

[1100]

M29 [9] 28.7 [1.128] 645 [1.00] 603 [0.934] 748 [1.159] 511.5 [115.0]

M32 [10] 32.3 [1.270] 819 [1.27] 744 [1.154] 950 [1.473] 617.0 [138.7]

D8505/D8505M − 25

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2. Referenced Documents

2.1 ASTM Standards:

A615/A615M Speciﬁcation for Deformed and Plain Carbon-

Steel Bars for Concrete Reinforcement

C904 Terminology Relating to Chemical-Resistant Nonme-

tallic Materials

D570 Test Method for Water Absorption of Plastics

D578/D578M Speciﬁcation for Glass Fiber Strands

D792 Test Methods for Density and Speciﬁc Gravity (Rela-

tive Density) of Plastics by Displacement

D2584 Test Method for Ignition Loss of Cured Reinforced

Resins

D3171 Test Methods for Constituent Content of Composite

Materials

D3878 Terminology for Composite Materials

D3950 Speciﬁcation for Strapping, Nonmetallic (and Join-

ing Methods)

D3953 Speciﬁcation for Strapping, Flat Steel and Seals

D4475 Test Method for Apparent Horizontal Shear Strength

of Pultruded Reinforced Plastic Rods By the Short-Beam

Method

D4649 Guide for Use of Stretch Films and Wrapping Appli-

cation

D4675 Guide for Selection and Use of Flat Strapping Ma-

terials

D5728 Practices for Securement of Cargo in Intermodal and

Unimodal Surface Transport

D7028 Test Method for Glass Transition Temperature (DMA

Tg) of Polymer Matrix Composites by Dynamic Mechani-

cal Analysis (DMA)

D7205/D7205M Test Method for Tensile Properties of Fiber

Reinforced Polymer Matrix Composite Bars

D7617/D7617M Test Method for Transverse Shear Strength

of Fiber-reinforced Polymer Matrix Composite Bars

D7705/D7705M Test Method for Alkali Resistance of Fiber

Reinforced Polymer (FRP) Matrix Composite Bars used

in Concrete Construction

D7913/D7913M Test Method for Bond Strength of Fiber-

Reinforced Polymer Matrix Composite Bars to Concrete

by Pullout Testing

D7957/D7957M Speciﬁcation for Solid Round Glass Fiber

Reinforced Polymer Bars for Concrete Reinforcement

D8448/D8448M Speciﬁcation for Basalt Fiber Strands

E1356 Test Method for Assignment of the Glass Transition

Temperatures by Differential Scanning Calorimetry

E2160 Test Method for Heat of Reaction of Thermally

Reactive Materials by Differential Scanning Calorimetry

3. Terminology

3.1 Deﬁnitions:

3.1.1 Terminology C904 deﬁnes terms relating to chemical-

resistant nonmetallic materials. Terminology D3878 deﬁnes

terms relating to composites materials.

3.2 Deﬁnitions of Terms Speciﬁc to This Standard:

3.2.1 bar, n—a straight element with a solid, round cross

section, having surface enhancement.

3.2.2 bar designation, n—an alphanumeric identiﬁer corre-

sponding to the standard size of the bar, as given in Table 3.

3.2.3 guaranteed property, n—a characteristic value pro-

vided by the manufacturer more than or equal to the mean

minus three standard deviations, where the mean is obtained

from at least 24 specimens (that is, test repetitions) in groups of

eight or more from three or more different production lots.

3.2.4 mean property, n—a value provided by the manufac-

turer equal to the average of a deﬁned set of tested specimens

(that is, test repetitions) according to a speciﬁed standard test

method.

3.2.5 measured cross-sectional area, n—the cross-sectional

area of the ﬁnished manufactured bar, including deformations,

lugs, sand coating or any bond-enhancing surface treatment,

measured according to Test Method D7205/D7205M, subsec-

tion 11.2.4.1.

3.2.6 nominal bar diameter, n—a standard diameter of a bar,

as given in Table 3.

3.2.7 nominal cross-sectional area, n—a standard cross-

sectional area of a bar, as given in Table 3.

3.2.8 production lot, n—any batch of bar produced from

start to ﬁnish with the same constituent materials used in the

same proportions without changing any production parameter

(for example, cure temperature or speed of production).

3.2.9 production lot number, n—a unique identiﬁcation

(number, alphanumerical, and/or symbols) assigned by the

manufacture to each bar production lot whereby it provides

traceability to the raw materials and manufacturing informa-

tion.

3.2.10 standard deviation, n—a value that indicate the

extent of deviation of a deﬁned set of tested specimens (that is,

test repetitions) according to a speciﬁed standard test method.

3.2.11 surface enhancement, n—any surface treatment, part

of the manufacturing process, that provides means of mechani-

cally transmitting force between the bar and the concrete

surrounding the bar, which may include for example

protrusions, lugs, sand coating, and/or deformations.

3.2.12 test, acceptance, n—an optional test, speciﬁed by and

completed under the supervision of the purchaser, to verify that

the material provided for a given project meets the require-

ments of the speciﬁcation.

3.2.13 test, qualiﬁcation, n—a test completed under the

supervision of the manufacturer to ensure conformance of the

bar or material to the requirements of a speciﬁcation.

3.2.14 test, quality control, n—a test completed on each

production lot of a bar or material, under the supervision of the

manufacturer, to ensure that the process of manufacturing the

bar remains under control and that the bar is within speciﬁca-

tion.

4. Ordering Information

4.1 The purchaser is responsible to specify all requirements

that are necessary for material ordered to this speciﬁcation.

For referenced ASTM standards, visit the ASTM website, www.astm.org, or

contact ASTM Customer Service at www.astm.org/contact. For Annual Book of

ASTM Standards volume information, refer to the standard’s Document Summary

page on the ASTM website.

D8505/D8505M − 25

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标签： #钢 #混凝土 #钢筋

摘要：

本页面详细介绍 ASTM D8505 - D8505M - 25 标准规范，该规范针对混凝土结构中使用的玄武岩和玻璃纤维增强聚合物（FRP）钢筋制定了统一的性能要求、测试方法及验收标准。作为最新发布的行业规范，ASTM D8505 涵盖了 FRP 钢筋的材料组成、力学性能、耐久性指标及尺寸公差等关键参数，适用于桥梁、隧道、海工结构及腐蚀环境下的混凝土加固工程。通过阅读本内容，工程师、采购人员及施工单位可快速掌握非金属 FRP 钢筋的合规性评估依据，确保选材符合国际安全与质量要求。

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ASTM D8505 - D 8505M - 25 混凝土钢筋用玄武岩和玻璃纤维增强聚合物（FRP）钢筋的标准规范

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