• Estimating Concrete Strength Using the Rebound Hammer ...

    Aug 08, 2019· In-Place Test methods to estimate concrete strength has been extremely popular among engineers and inspectors involved in the field of structure inspection, ...

  • Concrete maturity calculation – How to estimate the strength

    Jun 15, 2020· In fact, the concrete maturity method is one of the best methods to estimate real strength. The best gain from the maturity method is the time. You can cut out the waiting time to check the 28 days strength of laboratory specimens if you estimate the real-time strength using the maturity method at the site.

  • Standard Practice for Estimating Concrete Strength by the ...

    5.1 This practice can be used to estimate the in-place strength of concrete to allow the start of critical construction activities such as: (1) removal of formwork and reshoring; (2) post-tensioning of tendons; (3) termination of cold weather protection; and (4) opening of roadways to traffic.

  • ACI 228.1R : Report on Methods for Estimating In-Place ...

    ACI 228.1R, 2019 Edition, January 2019 - Report on Methods for Estimating In-Place Concrete Strength. In-place tests are performed typically on concrete within a structure, in contrast to tests performed on molded specimens made from the concrete to be used in the structure. Historically, they have been called nondestructive tests because some ...

  • 228.1R-03: In-Place Methods to Estimate Concrete Strength

    Sep 16, 2003· This document was replaced by 228.1R-19. Guidance is provided on the use of methods to estimate the in-place strength of concrete in new and existing construction. The methods include: rebound number, penetration resistance, pullout, break-off, ultrasonic pulse velocity, maturity, and cast-in-place cylinders.

  • Estimating the In-Place Concrete Strength by a Matur ity ...

    Estimating the In-Place Concrete Strength by a Matur ity Method (This procedure modifies ASTM C 1074-11. The current ASTM C 1074 is to be used in conjunction with this procedure.) 1. SCOPE. 1.1 This provides a procedure for estimating -place concrete strength in the maturity method. using

  • 228.1R-03 In-Place Methods to Estimate Concrete Strength

    In-Place Methods to Estimate Concrete Strength ACI 228.1R-03 Guidance is provided on the use of methods to estimate the in-place strength of concrete in new and existing construction. The methods include: rebound number, penetration resistance, pullout, break-off, ultrasonic pulse velocity, maturity, and cast-in-place cylinders.

  • CIP 9 - Low Concrete Cylinder Strength

    Apr 09, 2020· acceptance of concrete should not be confused with field-cured cylinders. Tests of field-cured cylinders are used to evaluate whether the in-place concrete has been properly cured and protected, to estimate the early-age strength in the structure to strip forms or for post-tensioning, and to continue construction activity.

  • Maturity curve for estimating the in-place strength of ...

    Maturity curve for estimating the in-place strength of high performance concrete Aleksandra Mariak1,*, Marzena Kurpińska1, and Krzysztof Wilde1 1Gdańsk University of Technology, Faculty of Civil ...

  • Estimating the In-Place Concrete Strength by a Maturity Method

    1.1 This provides a procedure for estimating in-place concrete strength by means of the maturity method. The maturity index is expressed either in terms of the temperature-time factor or in terms of the equivalent age at a specified temperature. 1.2 This procedure is identical to ASTM C ...

  • ACI 228.1R - Report on Methods for Estimating In-Place ...

    Jan 01, 2019· An alternative approach for correlation between tests results and concrete strength is presented in EN 13791 (2007) and BS 6089 (2010). In-place tests can be used to estimate concrete strength during construction so that operations requiring a specific strength can be performed safely or curing procedures terminated.

  • Estimating In-Place Concrete Strength in Concrete Slab ...

    Feb 02, 2017· The Solution – Estimating In-Place Concrete Strength After careful review of existing data, FPrimeC designed a NDT/NDE plan for estimating in-place concrete strength in concrete slab (6″ thick). The test area was tested on a systematic grid layout, with dense spacing around the edges and shorings, and wider spacing in the interior parts of ...

  • Maturity Method: Estimating Concrete Strength - Maturix

    Estimate In-place Concrete Strength with the Maturity Method The strength development of a concrete structure is strongly influenced by the temperature and weather conditions at the job site. In construction projects, knowing this strength is crucial as many further decisions depend on it.

  • Estimating the In-Place Concrete Strength by a Matur ity ...

    Estimating the In-Place Concrete Strength by a Matur ity Method (This procedure modifies ASTM C 1074-11. The current ASTM C 1074 is to be used in conjunction with this procedure.) 1. SCOPE. 1.1 This provides a procedure for estimating -place concrete strength by means of the maturity in method.

  • in-place methods to estimate concrete strength

    In-Place Methods to Estimate Concrete Strength ACI 228.1R-03 Guidance is provided on the use of methods to estimate the in-place strength of concrete in new and existing construction. The methods include: rebound number, penetration resistance, pullout, break-off, ultrasonic pulse velocity, maturity, and cast-in-place cylinders.

  • Report on Methods for Estimating In-Place Concrete Strength

    This report provides methods for estimating the in-place strength of concrete in new and existing construction. These methods include: rebound number, penetration resistance, pullout, pull-off, ultrasonic pulse velocity, maturity, and cast-in-place cylinders. The principle, inherent limitations, and repeatability of each method are reviewed.

  • Estimating Concrete Strength by the Maturity Method

    Jan 15, 2019· Haghbin & Associates Ltd. was retained by EllisDon to develop the maturity calibration curves for various concrete mix designs (35 MPa, 50 MPa and 80 MPa) for CIBC Square project at 81 Bay Street, Toronto. Estimate In-Place Concrete Strength Maturity method—a technique for estimating concrete strength that is based on the assumption that samples of a given concrete …

  • Estimating in-place concrete strength

    Estimating in-place concrete strength. Q. Are there ways to estimate the compressive strength of in-place concrete without drilling cores from the structure? A. ACI 228.1R-19, "Report on Methods for Estimating In-Place Concrete Strength," reviews several …

  • Measuring the Strength of In-Place Concrete| Concrete ...

    Mar 30, 2012· The method for determining the rebound number of hardened concrete is given in ASTM C805. The uses of the rebound hammer are given in Section 5.1 of C805, which states that "this test method is applicable to assess the in-place uniformity of the concrete, to delineate regions in a structure of poorer quality or deteriorated concrete, and to estimate strength."

  • "Maturity Method" for In-Place Concrete Strength: What Is ...

    Jul 12, 2019· Estimating in-place concrete strength using the maturity method is the easiest and most efficient way of finding real-time strength. To ensure that this method is being executed properly and accurate results are being obtained, it is recommended that the maturity curve be validated before use.

  • 228.1R-03: In-Place Methods to Estimate Concrete Strength ...

    Guidance is provided on the use of methods to estimate the in-place strength of concrete in new and existing construction. The methods include: rebound number, penetration resistance, pullout, break-off, ultrasonic pulse velocity, maturity, and cast-in-place cylinders.

  • Engineering Brief # 34A - FAA

    TABLE 1 FLEXURAL STRENGTH ESTIMATE - AGE AND CONFIDENCE INTERVAL In-Place Concrete Age (in days) Flexural Strength (MR) Estimate where T = Splitting Tensile Strength from ASTM C 496 Confidence Interval (percent) up to 60 days MR (psi.) = 1.02 x T + 117 85 percent 60 to 276 days MR (psi.) = 1.02 x T + 117 - 0.25 x (Age ...

  • 7 Methods for Testing Concrete Strength | For Construction ...

    Jun 11, 2019· A lab must be used to obtain strength data. 6. Cast-in-place Cylinders (ASTM C873) ... A Study on Estimating Concrete Compressive Strength by Mechanical Impedance. January 20, 2021.

  • Reported by ACI Committee 228 ACI 228.1R-19

    in-place test results and the uncertainty of the relationship between these two parameters. These sources of uncer-tainty are discussed in this report. An alternative approach for correlation between tests results and concrete strength is presented in EN 13791 (2007) and BS 6089 (2010). In-place tests can be used to estimate concrete strength

  • Estimating Concrete Strength Using the Rebound Hammer ...

    Aug 08, 2019· In-Place Test methods to estimate concrete strength has been extremely popular among engineers and inspectors involved in the field of structure inspection, ...

  • Concrete maturity calculation – How to estimate the strength

    Jun 15, 2020· In fact, the concrete maturity method is one of the best methods to estimate real strength. The best gain from the maturity method is the time. You can cut out the waiting time to check the 28 days strength of laboratory specimens if you estimate the real-time strength using the maturity method at the site.

  • Standard Practice for Estimating Concrete Strength by the ...

    5.1 This practice can be used to estimate the in-place strength of concrete to allow the start of critical construction activities such as: (1) removal of formwork and reshoring; (2) post-tensioning of tendons; (3) termination of cold weather protection; and (4) opening of roadways to traffic.

  • ACI 228.1R : Report on Methods for Estimating In-Place ...

    ACI 228.1R, 2019 Edition, January 2019 - Report on Methods for Estimating In-Place Concrete Strength. In-place tests are performed typically on concrete within a structure, in contrast to tests performed on molded specimens made from the concrete to be used in the structure. Historically, they have been called nondestructive tests because some ...

  • 228.1R-03: In-Place Methods to Estimate Concrete Strength

    Sep 16, 2003· This document was replaced by 228.1R-19. Guidance is provided on the use of methods to estimate the in-place strength of concrete in new and existing construction. The methods include: rebound number, penetration resistance, pullout, break-off, ultrasonic pulse velocity, maturity, and cast-in-place cylinders.

  • Estimating the In-Place Concrete Strength by a Matur ity ...

    Estimating the In-Place Concrete Strength by a Matur ity Method (This procedure modifies ASTM C 1074-11. The current ASTM C 1074 is to be used in conjunction with this procedure.) 1. SCOPE. 1.1 This provides a procedure for estimating -place concrete strength in the maturity method. using

  • 228.1R-03 In-Place Methods to Estimate Concrete Strength

    In-Place Methods to Estimate Concrete Strength ACI 228.1R-03 Guidance is provided on the use of methods to estimate the in-place strength of concrete in new and existing construction. The methods include: rebound number, penetration resistance, pullout, break-off, ultrasonic pulse velocity, maturity, and cast-in-place cylinders.

  • CIP 9 - Low Concrete Cylinder Strength

    Apr 09, 2020· acceptance of concrete should not be confused with field-cured cylinders. Tests of field-cured cylinders are used to evaluate whether the in-place concrete has been properly cured and protected, to estimate the early-age strength in the structure to strip forms or for post-tensioning, and to continue construction activity.

  • Maturity curve for estimating the in-place strength of ...

    Maturity curve for estimating the in-place strength of high performance concrete Aleksandra Mariak1,*, Marzena Kurpińska1, and Krzysztof Wilde1 1Gdańsk University of Technology, Faculty of Civil ...

  • Estimating the In-Place Concrete Strength by a Maturity Method

    1.1 This provides a procedure for estimating in-place concrete strength by means of the maturity method. The maturity index is expressed either in terms of the temperature-time factor or in terms of the equivalent age at a specified temperature. 1.2 This procedure is identical to ASTM C ...

  • ACI 228.1R - Report on Methods for Estimating In-Place ...

    Jan 01, 2019· An alternative approach for correlation between tests results and concrete strength is presented in EN 13791 (2007) and BS 6089 (2010). In-place tests can be used to estimate concrete strength during construction so that operations requiring a specific strength can be performed safely or curing procedures terminated.

  • Estimating In-Place Concrete Strength in Concrete Slab ...

    Feb 02, 2017· The Solution – Estimating In-Place Concrete Strength After careful review of existing data, FPrimeC designed a NDT/NDE plan for estimating in-place concrete strength in concrete slab (6″ thick). The test area was tested on a systematic grid layout, with dense spacing around the edges and shorings, and wider spacing in the interior parts of ...

  • Maturity Method: Estimating Concrete Strength - Maturix

    Estimate In-place Concrete Strength with the Maturity Method The strength development of a concrete structure is strongly influenced by the temperature and weather conditions at the job site. In construction projects, knowing this strength is crucial as many further decisions depend on it.

  • Estimating the In-Place Concrete Strength by a Matur ity ...

    Estimating the In-Place Concrete Strength by a Matur ity Method (This procedure modifies ASTM C 1074-11. The current ASTM C 1074 is to be used in conjunction with this procedure.) 1. SCOPE. 1.1 This provides a procedure for estimating -place concrete strength by means of the maturity in method.

  • in-place methods to estimate concrete strength

    In-Place Methods to Estimate Concrete Strength ACI 228.1R-03 Guidance is provided on the use of methods to estimate the in-place strength of concrete in new and existing construction. The methods include: rebound number, penetration resistance, pullout, break-off, ultrasonic pulse velocity, maturity, and cast-in-place cylinders.

  • Report on Methods for Estimating In-Place Concrete Strength

    This report provides methods for estimating the in-place strength of concrete in new and existing construction. These methods include: rebound number, penetration resistance, pullout, pull-off, ultrasonic pulse velocity, maturity, and cast-in-place cylinders. The principle, inherent limitations, and repeatability of each method are reviewed.

  • Estimating Concrete Strength by the Maturity Method

    Jan 15, 2019· Haghbin & Associates Ltd. was retained by EllisDon to develop the maturity calibration curves for various concrete mix designs (35 MPa, 50 MPa and 80 MPa) for CIBC Square project at 81 Bay Street, Toronto. Estimate In-Place Concrete Strength Maturity method—a technique for estimating concrete strength that is based on the assumption that samples of a given concrete …

  • Estimating in-place concrete strength

    Estimating in-place concrete strength. Q. Are there ways to estimate the compressive strength of in-place concrete without drilling cores from the structure? A. ACI 228.1R-19, "Report on Methods for Estimating In-Place Concrete Strength," reviews several …

  • Measuring the Strength of In-Place Concrete| Concrete ...

    Mar 30, 2012· The method for determining the rebound number of hardened concrete is given in ASTM C805. The uses of the rebound hammer are given in Section 5.1 of C805, which states that "this test method is applicable to assess the in-place uniformity of the concrete, to delineate regions in a structure of poorer quality or deteriorated concrete, and to estimate strength."

  • "Maturity Method" for In-Place Concrete Strength: What Is ...

    Jul 12, 2019· Estimating in-place concrete strength using the maturity method is the easiest and most efficient way of finding real-time strength. To ensure that this method is being executed properly and accurate results are being obtained, it is recommended that the maturity curve be validated before use.

  • 228.1R-03: In-Place Methods to Estimate Concrete Strength ...

    Guidance is provided on the use of methods to estimate the in-place strength of concrete in new and existing construction. The methods include: rebound number, penetration resistance, pullout, break-off, ultrasonic pulse velocity, maturity, and cast-in-place cylinders.

  • Engineering Brief # 34A - FAA

    TABLE 1 FLEXURAL STRENGTH ESTIMATE - AGE AND CONFIDENCE INTERVAL In-Place Concrete Age (in days) Flexural Strength (MR) Estimate where T = Splitting Tensile Strength from ASTM C 496 Confidence Interval (percent) up to 60 days MR (psi.) = 1.02 x T + 117 85 percent 60 to 276 days MR (psi.) = 1.02 x T + 117 - 0.25 x (Age ...

  • 7 Methods for Testing Concrete Strength | For Construction ...

    Jun 11, 2019· A lab must be used to obtain strength data. 6. Cast-in-place Cylinders (ASTM C873) ... A Study on Estimating Concrete Compressive Strength by Mechanical Impedance. January 20, 2021.

  • Reported by ACI Committee 228 ACI 228.1R-19

    in-place test results and the uncertainty of the relationship between these two parameters. These sources of uncer-tainty are discussed in this report. An alternative approach for correlation between tests results and concrete strength is presented in EN 13791 (2007) and BS 6089 (2010). In-place tests can be used to estimate concrete strength