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ASTM D7957/D7957M-17

(Specification)

Standard Specification for Solid Round Glass Fiber Reinforced Polymer Bars for Concrete Reinforcement

Standard Specification for Solid Round Glass Fiber Reinforced Polymer Bars for Concrete Reinforcement

SCOPE
1.1 This specification covers glass fiber reinforced polymer (GFRP) bars, provided in cut lengths and bent shapes and having an external surface enhancement for concrete reinforcement. Bars covered by this specification shall meet the requirements for geometric, material, mechanical, and physical properties described herein.  
1.2 Bars produced according to this standard are qualified using the test methods and must meet the requirements given by Table 1. Quality control and certification of production lots of bars are completed using the test methods and must meet the requirements given in Table 2.
TABLE 1 Property Limits and Test Methods for QualificationA    
Property  
Limit  
Test Method  
Mean Glass Transition Temperature  
Midpoint temperature ≥100 °C [212 °F]  
ASTM E1356  
Mean Degree of Cure  
≥95 %  
ASTM E2160  
Mean Measured Cross-Sectional Area  
Table 3  
ASTM D7205/D7205M, subsection 11.2.5.1  
GuaranteedB Ultimate Tensile Force  
Table 3  
ASTM D7205/D7205M  
Mean Tensile Modulus of Elasticity  
≥44,800 MPa [6 500 000 psi]  
ASTM D7205/D7205M  
Mean Ultimate Tensile Strain  
≥1.1 %  
ASTM D7205/D7205M  
GuaranteedB Transverse Shear Strength  
≥131 MPa [19 000 psi]  
ASTM D7617/D7617M  
GuaranteedB Bond Strength  
≥7.6 MPa [1100 psi]  
ASTM D7913/D7913M  
Mean Moisture Absorption to Saturation  
≤1.0 % to saturation at 50 °C [122 °F]  
ASTM D570, subsection 7.4  
Mean Alkaline Resistance  
≥80 % of initial mean ultimate tensile force following 90 days at 60 °C [140 °F]  
ASTM D7705/D7705M, Procedure A  
GuaranteedB Ultimate Tensile Force of Bent Portion of Bar  
≥60 % of the values in Table 3  
ASTM D7914/D7914M(A) For the determination of the mean and guaranteed properties, at least 24 samples 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.(B) Guaranteed property is defined in 3.2.5.  
TABLE 2 Property Limits and Test Methods for Quality Control and CertificationA,B    
Property  
Limit  
Test Method  
Fiber Mass Content  
≥70 %  
ASTM D2584 or ASTM D3171  
Glass Transition Temperature  
Midpoint temperature ≥100 °C [212 °F]  
ASTM E1356  
Degree of Cure  
≥95 %  
ASTM E2160  
Measured Cross-Sectional Area  
Table 3  
ASTM D7205/D7205M, subsection 11.2.5.1  
Ultimate Tensile Force  
Table 3  
ASTM D7205/D7205M  
Tensile Modulus of Elasticity  
≥44 800 MPa [6 500 000 psi]  
ASTM D7205/D7205M  
Ultimate Tensile Strain  
≥1.1 %  
ASTM D7205/D7205M  
Moisture Absorption in 24 h  
≤0.25 % in 24 h at 50 °C [122 °F]  
ASTM D570, subsection 7.4(A) For the determination of each of the property limits, five random samples shall be obtained from each production lot. Each individual sample shall satisfy the property limits.(B) For bent bars, the tests are performed on the straight portion of the bars.  
TABLE 3 Geometric and Mechanical Property Requirements    
Bar
Designation
No.  
Nominal Dimensions  
Measured Cross-Sectional Area Limits
mm2 [in.2]  
Minimum
Guaranteed
Ultimate
Tensile Force
kN [kip]  
Diameter
mm [in.]  
Cross-Sectional Area
mm2 [in.2]  
Minimum  
Maximum  
M6 [2]  
6.3 [0.250]  
32 [0.049]  
30 [0.046]  
55 [0.085]  
27 [6.1]  
M10 [3]  
9.5 [0.375]  
71 [0.11]  
67 [0.104]  
104 [0.161]  
59 [13.2]  
M13 [4]  
12.7 [0.500]  
129 [0.20]  
119 [0.185]  
169 [0.263]  
96 [21.6]  
M16 [5]  
15.9 [0.625]  
199 [0.31]  
186 [0.288]  
251 [0.388]  
130 [29.1]  
M19 [6]  
19.1 [0.750]  
284 [0.44]  
268 [0.415]  
347 [0.539]  
182 [40.9]  
M22 [7]  
22.2 [0.875]  
387 [0.60]  
365 [0.565]  
460 [0.713]  
241 [54.1]  
M25 [8]  
25.4 [1.000]  
510 [0.79]  
476 [0.738]  
589 [0.913]  
297 [66.8]  
M29 [9]  
28.7 [1.128]  
645 [1.00]  
603 [0.934]  
733 [1.137]  
365 [82.0]  
M32 [10]  
32.3 [1.270]  
819 [1.27]  
744 [1....

General Information

Status
Historical
Publication Date
31-Jul-2017
ICS
91.100.30 - Concrete and concrete products
Technical Committee
D30 - Composite Materials
Drafting Committee
D30.10 - Composites for Civil Structures
Current Stage
Ref Project

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ASTM D7957/D7957M-17 - Standard Specification for Solid Round Glass Fiber Reinforced Polymer Bars for Concrete ReinforcementASTM D7957/D7957M-17 - Standard Specification for Solid Round Glass Fiber Reinforced Polymer Bars for Concrete Reinforcement
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D7957/D7957M −17
Standard Specification for
Solid Round Glass Fiber Reinforced Polymer Bars for
1
Concrete Reinforcement
This standard is issued under the fixed designation D7957/D7957M; 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 1.7 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This specification covers glass fiber reinforced polymer
responsibility of the user of this standard to establish appro-
(GFRP) bars, provided in cut lengths and bent shapes and
priate safety, health and environmental practices and deter-
havinganexternalsurfaceenhancementforconcretereinforce-
mine the applicability of regulatory limitations prior to use.
ment. Bars covered by this specification shall meet the require-
1.8 This international standard was developed in accor-
ments for geometric, material, mechanical, and physical prop-
dance with internationally recognized principles on standard-
erties described herein.
ization established in the Decision on Principles for the
1.2 Bars produced according to this standard are qualified
Development of International Standards, Guides and Recom-
using the test methods and must meet the requirements given
mendations issued by the World Trade Organization Technical
by Table 1. Quality control and certification of production lots
Barriers to Trade (TBT) Committee.
ofbarsarecompletedusingthetestmethodsandmustmeetthe
requirements given in Table 2.
2. Referenced Documents
2
1.3 The text of this specification references notes and 2.1 ASTM Standards:
footnotes which provide explanatory material. These notes and
A615/A615M SpecificationforDeformedandPlainCarbon-
footnotes (excluding those in tables) shall not be considered as Steel Bars for Concrete Reinforcement
requirements of the specification.
C904 Terminology Relating to Chemical-Resistant Nonme-
tallic Materials
1.4 The following FRP materials are not covered by this
D570 Test Method for Water Absorption of Plastics
specification:
D792 Test Methods for Density and Specific Gravity (Rela-
1.4.1 Bars made of more than one load-bearing fiber type
tive Density) of Plastics by Displacement
(that is, hybrid FRP).
D2584 Test Method for Ignition Loss of Cured Reinforced
1.4.2 Bars having no external surface enhancement (that is,
Resins
plain or smooth bars, or dowels).
D3171 Test Methods for Constituent Content of Composite
1.4.3 Bars with geometries other than solid, round cross
Materials
sections.
D3878 Terminology for Composite Materials
1.4.4 Pre-manufactured grids and gratings made with FRP
D7205/D7205M Test Method for Tensile Properties of Fiber
materials.
Reinforced Polymer Matrix Composite Bars
1.5 This specification is applicable for either SI (as Speci-
D7617/D7617M Test Method for Transverse Shear Strength
fication D7957M) or inch-pound units (as Specification
of Fiber-reinforced Polymer Matrix Composite Bars
D7957).
D7705/D7705M Test Method for Alkali Resistance of Fiber
1.6 The values stated in either inch-pound units or SI units Reinforced Polymer (FRP) Matrix Composite Bars used
are to be regarded as standard. Within the text, the inch-pound in Concrete Construction
units are shown in brackets. The values stated in each system D7913/D7913M Test Method for Bond Strength of Fiber-
are not exact equivalents; therefore, each system shall be used Reinforced Polymer Matrix Composite Bars to Concrete
independently of the other. Combining values from the two by Pullout Testing
systems may result in nonconformance with the specification. D7914/D7914M Test Method for Strength of Fiber Rein-
forced Polymer (FRP) Bent Bars in Bend Locations
1
This specification is under the jurisdiction of ASTM Committee D30 on
2
Composite Materials and is the direct responsibility of Subcommittee D30.10 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Composites for Civil Structures. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Aug. 1, 2017. Published August 2017. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 2017. DOI: 10.1520/D7957_D7957M-17. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7957/D7957M−17
A
TABLE 1 Property Limits and Test Methods for Qualification
Property Limit Test Method
Mean Glass Transition Temperature Midpoint temperature$100 °C [212 °F] ASTM E1356
Mean Degree of Cure $9
...

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ASTM D7957/D7957M-22(Specification)
Standard Specification for Solid Round Glass Fiber Reinforced Polymer Bars for Concrete Reinforcement

ABSTRACT
This specification covers glass fiber reinforced polymer (GFRP) bars, provided in cut lengths and bent shapes and having an external surface enhancement for concrete reinforcement. It specifies the property limits and test methods for qualification, quality control and certification of GFRP bars, the geometric and mechanical property requirements, and minimum inside bend diameter of bent bars. Physical properties include fiber mass content, glass transition temperature, degree of cure, and bar sizes), whereas mechanical properties include ultimate tensile force, tensile modulus of elasticity, ultimate tensile strain, transverse shear strength, and bond strength.
This specification also covers the manufacturing process for constituent materials, namely, reinforcing fibers and matrix resins; durability properties (moisture absorption, resistance to alkaline environment); sampling (product qualification, quality control and certification); product certification; and markings and traceability.
SCOPE
1.1 This specification covers glass fiber reinforced polymer (GFRP) bars, provided in cut lengths and bent shapes and having an external surface enhancement for concrete reinforcement. Bars covered by this specification shall meet the requirements for geometric, material, mechanical, and physical properties described herein.  
1.2 Bars produced according to this standard are qualified using the test methods and must meet the requirements given by Table 1. Quality control and certification of production lots of bars are completed using the test methods and must meet the requirements given in Table 2.    
1.3 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.  
1.4 The following FRP materials are not covered by this specification:  
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 enhancement (that is, plain or smooth bars, or dowels).  
1.4.3 Bars with geometries other than solid, round cross sections.  
1.4.4 Pre-manufactured grids and gratings made with FRP materials.  
1.5 This specification is applicable for either SI (as Specification D7957M) or inch-pound units (as Specification D7957).  
1.6 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.7 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.8 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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ASTM D7958/D7958M-17(Test Method)
Standard Test Method for Evaluation of Performance for FRP Composite Bonded to Concrete Substrate using Beam Test

SIGNIFICANCE AND USE
5.1 This test method serves as a means for uniformly preparing and testing standard specimens suitable for being subject to environmental conditioning and subsequently used to evaluate FRP-bonded-to-concrete system performance, and evaluating and reporting the results.  
5.2 This test method is intended for use in the laboratory.  
5.3 The comparison of results from this test method conducted on identical specimens subject to different environmental conditioning protocols can be used to evaluate the effects of environmental exposure on the bond performance of FRP systems.
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1.2 This test method is used for assessment and comparison of FRP systems subject to environmental conditioning. This test method is not intended for job approval or product qualification purposes.  
1.3 This test method is intended for use with adhesive-applied FRP systems and is appropriate for use with FRP systems having any fiber orientation or combination of ply orientations comprising the FRP composite, although the test condition only considers forces in the direction parallel to the beam longitudinal axis.  
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.  
1.4.1 Within the text, the inch-pound units are shown in brackets.  
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ASTM C1293/C1293M-23(Test Method)
Standard Test Method for Determination of Length Change of Concrete Due to Alkali-Silica Reaction

SIGNIFICANCE AND USE
4.1 Alkali-silica reaction is a chemical interaction between some siliceous constituents of concrete aggregates and hydroxyl ions (1).5 The concentration of hydroxyl ion within the concrete is predominantly controlled by the concentration of sodium and potassium (2).  
4.2 This test method is intended to evaluate the potential of an aggregate or combination of an aggregate with pozzolan or slag to expand deleteriously due to any form of alkali-silica reactivity (3, 4).  
4.3 If testing an aggregate with pozzolan or slag, the results are used to establish minimum amounts of the specific pozzolan or slag needed to prevent deleterious expansion. Pozzolan or slag from a specific source can be tested individually or in combination with pozzolan or slag from other sources.  
4.4 When selecting a sample or deciding on the number of samples for test, it is important to recognize the variability in lithology of material from a given source, whether a deposit of sand, gravel, or a rock formation of any origin. For specific advice, see Guide C295/C295M.  
4.5 This test method is intended for evaluating the behavior of aggregates portland cement in concrete with an alkali (alkali metal oxide) content of 5.25 kg/m3 [8.85 lb/yd3] or in concrete containing pozzolan or slag with an alkali content proportionally reduced from 5.25 kg/m3 [8.85 lb/yd3] Na2O equivalent by the amount of pozzolan or slag replacing portland cement. This test method assesses the potential for deleterious expansion of concrete caused by alkali-silica reaction, of either coarse or fine aggregates, from tests performed under prescribed laboratory curing conditions that will probably differ from field conditions. Thus, actual field performance will not be duplicated due to differences in concrete alkali content, wetting and drying, temperature, other factors, or combinations of these (5).  
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1.1 This test method covers the determination of the susceptibility of an aggregate or combination of an aggregate with pozzolan or slag for participation in expansive alkali-silica reaction by measurement of length change of concrete prisms.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as the standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.
Note 1: Sieve size is identified by its standard designation in Specification E11. The alternative designation given in parentheses is for information only and does not represent a different standard sieve size.  
1.3 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.  
1.4 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.2)  
1.5 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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ASTM D4791-19(2023)(Test Method)
Standard Test Method for Flat Particles, Elongated Particles, or Flat and Elongated Particles in Coarse Aggregate

SIGNIFICANCE AND USE
5.1 The particle shape of coarse aggregates influences the properties of some construction materials and may affect their placement and consolidation.  
5.2 This test method provides a means for checking compliance with specifications that limit such particles or to determine the relative shape characteristics of coarse aggregates.
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4.1 This practice provides for using an unbonded capping system in testing hardened concrete cylinders made in accordance with Practices C31/C31M or C192/C192M, or cores obtained in accordance with Test Method C42/C42M in lieu of the capping systems described in Practice C617/C617M.  
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1.3 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.  
1.4 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. Combining values from the two systems may result in non-conformance with the standard.  
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1.6 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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Standard Test Method for Passing Ability of Self-Consolidating Concrete by J-Ring

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5.1 This test method provides a procedure to determine the passing ability of self-consolidating concrete. This test method is applicable for laboratory use in comparing the passing ability of different concrete mixtures. It is also applicable in the field as a quality control test.  
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5.3 This test method is limited to self-consolidating concrete with nominal maximum size of aggregate of up to 25 mm [1 in.].
SCOPE
1.1 This test method covers determination of the passing ability of self-consolidating concrete (SCC) by using the J-Ring in combination with a mold.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.  
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ASTM C617/C617M-23(Practice)
Standard Practice for Capping Cylindrical Concrete Specimens

SIGNIFICANCE AND USE
3.1 This practice describes procedures for providing plane surfaces on the ends of freshly molded concrete cylinders, hardened cylinders, or drilled concrete cores when the end surfaces do not conform with the planeness and perpendicularity requirements of applicable standards. Practice C1231/C1231M describes alternative procedures using unbonded caps or pad caps.
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1.1 This practice covers apparatus, materials, and procedures for capping freshly molded concrete cylinders with neat cement and hardened cylinders and drilled concrete cores with high-strength gypsum paste or sulfur mortar.  
1.2 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.  
1.3 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. Combining values from the two systems may result in non-conformance with the standard.  
1.4 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific precaution statements see 4.3.1 and 6.2.4.1.  
1.5 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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ASTM C142/C142M-17(2023)(Test Method)
Standard Test Method for Clay Lumps and Friable Particles in Aggregates

SIGNIFICANCE AND USE
4.1 This test method is of primary significance in determining the acceptability of aggregate with respect to the requirements of Specification C33/C33M.
SCOPE
1.1 This test method covers the approximate determination of clay lumps and friable particles in aggregates.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
Note 1: Sieve sizes openings are identified by their Specification E11 designation with their alternative Specification E11 designation given in parentheses for information only.  
1.3 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 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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ASTM C1701/C1701M-17a(2023)(Test Method)
Standard Test Method for Infiltration Rate of In Place Pervious Concrete

SIGNIFICANCE AND USE
5.1 Tests performed at the same location across a span of years may be used to detect a reduction of infiltration rate of the pervious concrete, thereby identifying the need for remediation.  
5.2 The infiltration rate obtained by this method is valid only for the localized area of the pavement where the test is conducted. To determine the infiltration rate of the entire pervious pavement multiple locations must be tested and the results averaged.  
5.3 The field infiltration rate is typically established by the design engineer of record and is a function of the design precipitation event.  
5.4 This test method does not measure the influence on in-place infiltration rate due to sealing of voids near the bottom of the pervious concrete slab. Visual inspection of concrete cores is the best approach for determining sealing of voids near the bottom of the pervious concrete slab.
SCOPE
1.1 This test method covers the determination of the field water infiltration rate of in place pervious concrete.
Note 1: For permeable unit pavement systems, Test Method C1781/C1781M should be used. Test Method C1781/C1781M is functionally identical to this test method but includes added provisions for positioning and securing the test ring to a discontinuous surface. Both tests methods give comparable results  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.3 The text of this standard references notes that provide explanatory material. These notes shall not be considered as requirements of the standard.  
1.4 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 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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ASTM
ASTM C873/C873M-23(Test Method)
Standard Test Method for Compressive Strength of Concrete Cylinders Cast in Place in Cylindrical Molds

ABSTRACT
This test method covers the determination of strength of cylindrical concrete specimens that have been molded in place using special molds attached to formwork. A concrete cylinder mold assembly consisting of a mold and a tubular support member is fastened within the concrete formwork prior to placement of the concrete. The elevation of the mold upper edge is adjusted to correspond to the plane of the finished slab surface. The mold support prevents direct contact of the slab concrete with the outside of the mold and permits its easy removal from the hardened concrete. Strength of cast-in-place cylinders may be used for various purposes, such as estimating the load-bearing capacity of slabs, determining the time of form and shore removal, and determining the effectiveness of curing and protection. Consolidation of concrete in the mold may be varied to simulate the conditions of placement. Internal vibration of concrete in the mold is prohibited except under special circumstances.
SIGNIFICANCE AND USE
4.1 Cast-in-place cylinder strength relates to the strength of concrete in the structure due to the similarity of curing conditions because the cylinder is cured within the slab. However, due to differences in moisture condition, degree of consolidation, specimen size, and length-diameter ratio, there is not a unique relationship between the strength of cast-in-place cylinders and cores of the same age. When cores can be drilled undamaged and tested in the same moisture condition as the cast-in-place cylinders, the strength of the cylinders can be expected to be on average 10 % higher than the cores at ages up to 91 days for specimens of the same size and length-diameter ratio.4  
4.2 Strength of cast-in-place cylinders may be used for various purposes, such as estimating the load-bearing capacity of slabs, determining the time of form and shore removal, and determining the effectiveness of curing and protection.
SCOPE
1.1 This test method covers the determination of strength of cylindrical concrete specimens that have been molded in place using special molds attached to formwork. This test method is limited to use in slabs where the depth of concrete is from 125 mm to 300 mm [5 in. to 12 in.].  
1.2 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.  
1.3 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. Combining values from the two systems may result in non-conformance with the standard.  
1.4 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.2)  
1.5 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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  • Standard
    4 pages
    English language
    sale 15% off