• AASHTO T 106M/T 106 Standard Method of Test for

    This test method covers determination of the compressive strength of hydraulic cement mortar using 50-mm (or 2-in.) cube specimens (see Note 1). Note 1-ASTM C349 provides an alternative procedure for this determination (not to be used for acceptance tests). This test method covers the application of the test using either inch-pound or SI units.

  • AASHTO T 22 : Standard Method of Test for Compressive

    AASHTO T 22, 2017 Edition, 2017 Standard Method of Test for Compressive Strength of Cylindrical Concrete Specimens This test method covers determination of compressive strength of cylindrical concrete specimens such as molded cylinders and drilled cores. It is limited to concrete having a unit weight in excess of 800 kg/m 3 (50 lb/ft 3). The values stated in either SI units or inch-pound units are

  • AASHTO T 22 Standard Method of Test for Compressive

    AASHTO T 276 Standard Method of Test for Measuring Early-Age Compression Strength and Projecting Later-Age Strength Published by AASHTO on January 1, 2017 This test method covers a procedure for making and curing concrete specimens and for testing them at an early age.

  • AASHTO Materials Standards with ASTM Equivalencies as of

    AASHTO Materials Standards with ASTM Equivalencies as of August 26, 2019 TS Pt DesigNo StdNo Cat ASTMEq Title 1a 2 T 100-15 (2019) T 100-15 (2019) Jointly Owned D854-00 Specific Gravity of Soils 3a 2 T 106M/T 106-18 T 106M/T 106-18 Jointly Owned C109/C109M-16 Compressive Strength of Hydraulic Cement Mortar (Using 50-mm or 2-in. Cube

  • EXAMPLE 6 DECK DESIGN, INCLUDING COLLISION ON A

    Concrete top cover cTop = 2.00 in. AASHTO T.5.10.1-1 Concrete bottom cover cBot = 1.00 in. AASHTO T.5.10.1-1 Wearing surface tWS = 3.00 in. Concrete strength f'c = 4.50 ksi (Concrete Class D compressive strength) Reinforcement strength fy = 60.00 ksi (Minimum yield strength of grade 60 steel) Concrete density WC = 0.150 kcf

  • Standards for 7-day and 28-day strength test results

    No strength test falls below the specified compressive strength by more than 500 psi (3.5 MPa) if the specified compressive strength is 5000 psi (35 MPa) or less; or by more than 10 percent of the specified compressive strength if the specified compressive strength exceeds 5000 psi (35 MPa).

  • ASTM D7012 14e1 Standard Test Methods for Compressive

    5.2 Method C, uniaxial compressive strength of rock is used in many design formulas and is sometimes used as an index property to select the appropriate excavation technique. Deformation and strength of rock are known to be functions of confining pressure. Method A, triaxial compression test, is commonly used to simulate the stress conditions under which most underground rock masses exist.

  • Standard Test Method for Compressive Strength of

    5.1 Care must be exercised in the interpretation of the significance of compressive strength determinations by this test method since strength is not a fundamental or intrinsic property of concrete made from given materials. Values obtained will depend on the size and shape of the specimen, batching, mixing procedures, the methods of sampling, molding, and fabrication and the age,

  • METHOD OF TEST FOR COMPRESSIVE STRENGTH OF

    METHOD OF TEST FOR COMPRESSIVE STRENGTH OF MOLDED CONCRETE CYLINDERS. A. SCOPE This test method covers the procedure for compression tests of molded concrete cylinders. It is a modification of ASTM C 39/C 39M and AASHTO T 22. B. REFERENCES AASHTO T 22 Compressive Strength of Cylindrical Concrete Specimens

  • Basics of Concrete Pavement Thickness Design

    AASHTO DESIGN Subgrade Strength Typical Soil Relationships Soil Type Strength k-value (psi / in.) Mr (psi) CBR Silts / Clays Very Low 50-100 1000-1900 <3 Fine grained Low 100-150 1900-2900 3-5.5 Sands Medium 150-220 2900-4300 5.5-12 Gravely soils High 220-250 4300-4850 >12 Bitumin.Treat. High 350-450 100,000+ >12 Cement.Treat./LCB High 400-600

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  • COMPRESSIVE STRENGTH OF CYLINDRICAL CONCRETE

    COMPRESSIVE STRENGTH . OF . CYLINDRICAL CONCRETE SPECIMENS . AASHTO T 22 (ASTM C1231) APPARATUS [ ] Testing machine has a verification of calibration within the last 13 months [ ] Protective Cage . SPECIMENS [ ] Neither end of the cylinder shall depart from perpendicularity to the axis by more than 0.5

  • AASHTO T 208 : Standard Method of Test for Unconfined

    AASHTO T 208, 2015 Edition, 2015 Standard Method of Test for Unconfined Compressive Strength of Cohesive Soil This test method covers the determination of the unconfined compressive strength of cohesive soil in the undisturbed, remolded, or compacted

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  • AASHTO Materials Standards with ASTM Equivalencies as of

    AASHTO Materials Standards with ASTM Equivalencies as of August 26, 2019 TS Pt DesigNo StdNo Cat ASTMEq Title 1a 2 T 100-15 (2019) T 100-15 (2019) Jointly Owned D854-00 Specific Gravity of Soils 3a 2 T 106M/T 106-18 T 106M/T 106-18 Jointly Owned C109/C109M-16 Compressive Strength of Hydraulic Cement Mortar (Using 50-mm or 2-in. Cube

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  • EXAMPLE 6 DECK DESIGN, INCLUDING COLLISION ON A

    Concrete top cover cTop = 2.00 in. AASHTO T.5.10.1-1 Concrete bottom cover cBot = 1.00 in. AASHTO T.5.10.1-1 Wearing surface tWS = 3.00 in. Concrete strength f'c = 4.50 ksi (Concrete Class D compressive strength) Reinforcement strength fy = 60.00 ksi (Minimum yield strength of grade 60 steel) Concrete density WC = 0.150 kcf

  • ASTM D7012 14e1 Standard Test Methods for Compressive

    5.2 Method C, uniaxial compressive strength of rock is used in many design formulas and is sometimes used as an index property to select the appropriate excavation technique. Deformation and strength of rock are known to be functions of confining pressure. Method A, triaxial compression test, is commonly used to simulate the stress conditions under which most underground rock masses exist.

  • Standard Test Method for Compressive Strength of

    5.1 Care must be exercised in the interpretation of the significance of compressive strength determinations by this test method since strength is not a fundamental or intrinsic property of concrete made from given materials. Values obtained will depend on the size and shape of the specimen, batching, mixing procedures, the methods of sampling, molding, and fabrication and the age,

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  • 503 Prestressed Concrete Members

    compressive strength in psi for each cylinder according to AASHTO T22. Test each cylinder to failure. Use a compression machine that automatically records the date, time, rate of loading on a load vs. time plot, and maximum load for each cylinder. Include a printout of this information with the strength documentation for each cylinder tested.

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  • Basics of Concrete Pavement Thickness Design

    AASHTO DESIGN Subgrade Strength Typical Soil Relationships Soil Type Strength k-value (psi / in.) Mr (psi) CBR Silts / Clays Very Low 50-100 1000-1900 <3 Fine grained Low 100-150 1900-2900 3-5.5 Sands Medium 150-220 2900-4300 5.5-12 Gravely soils High 220-250 4300-4850 >12 Bitumin.Treat. High 350-450 100,000+ >12 Cement.Treat./LCB High 400-600

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  • Allowable Compressive Stress at Prestress Transfer

    analysis of the results, an increase of the allowable compressive stress limit at prestress transfer to 0.65f’ci is justified. Additionally, the use of self consolidating concrete with a maximum compressive stress of 0.65f’ci is not recommended. 17. Key Words Allowable release stress, compressive stress limit,

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  • Fabreeka -PTFE Bearing Pads

    compressive load and rotation (also known as “cold flow”), as the bearing pad compresses. Tensile Strength: ASTM D4894/4895 2,800 psi (min) Elongation: ASTM D4894/4895 200% • Bearing pad meets AASHTO 18.4.9.1, MIL-C-882 and most state DOT specifications • PTFE (Teflon) surface provides low friction for expansion • Accommodates

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  • Section 430 Portland Cement Concrete Pavement

    mix designs will be verified for early compressive strength according to ASTM C-684, Method A. Class HES concrete mix designs will be verified for compressive strength development at 72 hours according to AASHTO T 126 and AASHTO T 22. 430.2 Materials Ensure that materials meet the requirements of the following Specifications: Material Section

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  • AASHTO Pavement Thickness Design Guide

    AASHTO values are 4.5 for rigid pavement and 4.2 for flexible pavement. b. Terminal servability index (Pt) Pt is considered to be that PSI that represents the lowest Flexural Strength (S’c) can also be approximated from compressive strength (fc) as follows: S’c = 2.3fc^0.667(psi).