Chapter 8: Acceptable Tolerance Limits for Independent Assurance

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Section 1: Acceptable Tolerance Limits

The following tables indicate the acceptable tolerance limits for the specified material.

  • Embankment

    Procedure

    Texas Test Method

    Tolerance

    In-place Density

    "Tex-115-E, Field Method for Determining In-Place Density of Soils and Base Materials"

    ± 2.5% Field Density



  • Untreated & Treated Sub-base and Base Courses

    Procedure

    Texas Test Method

    Tolerance

    In-place Density

    "Tex-115-E, Field Method for Determining In-Place Density of Soils and Base Materials"

    ± 2.5% Field Density

    Gradation:

    "Tex-110-E, Particle Size Analysis of Soils"

     

    • > No. 4
    • ≤ No. 4

     

    • ± 5%
    • ± 3%

    Liquid Limit

    "Tex-104-E, Determining Liquid Limit of Soils"

    15% of the mean*

    Plasticity Index

    "Tex-106-E, Calculating the Plasticity Index of Soils"

    20% of the mean*

    *The difference between compared test results shall not exceed the indicated percentage of the mean of the compared test results - the mean being the average of the two test results.



  • Asphalt Stabilized Base

    Procedure

    Texas Test Method

    Tolerance

    Gradation:

    "Tex-200-F, Sieve Analysis of Fine and Coarse Aggregates"

     

    • >No. 4
    • ≤ No. 4

     

    • ± 5%
    • ± 3%

    Liquid Limit

    "Tex-104-E, Determining Liquid Limit of Soils"

    15% of the mean*

    Plasticity Index

    "Tex-106-E, Calculating the Plasticity Index of Soils"

    20% of the mean*

    Percent Asphalt

    "Tex-210-F, Determining Asphalt Content of Bituminous Mixtures by Extraction"

    ± 0.3%

     

    "Tex-228-F. Determining Asphalt Content of Bituminous Mixtures by the Nuclear Method"

    ± 0.3%

     

    "Tex-126-E, Molding, Testing, and Evaluating Bituminous Black Base Materials"

    ± 0.3%

     

    "Tex-229-F, Combined HMAC Cold-belt Sampling and Testing Procedure"

    ± 0.3%

     

    "Tex-236-F, Determining Asphalt Content from Asphalt Paving Mixtures by the Ignition Method"

    ± 0.3%

    In-place Density (Cores)

    "Tex-207-F, Determining Density of Compacted Bituminous Mixtures"

    ± 1% Field Density

    *The difference between compared test results shall not exceed the indicated percentage of the mean of the compared test results - the mean being the average of the two test results.



  • Surface Treatment Aggregates

    Procedure

    Texas Test Method

    Tolerance

    Gradation:

    "Tex-200-F, Sieve Analysis of Fine and Coarse Aggregates"

     

    • > No. 4
    • ≤ No. 4

     

    • ± 5%
    • ± 3%


  • Portland Cement Concrete Coarse Aggregate

    Procedure

    Texas Test Method

    Tolerance

    Gradation:

    "Tex-401-A, Sieve Analysis of Fine and Coarse Aggregate"

     

    • > No. 4
    • £ No. 4

     

    • ± 5%
    • ± 3%


  • Portland Cement Concrete Fine Aggregate

    Procedure

    Texas Test Method

    Tolerance

    Gradation (3/8" through No. 200)

    "Tex-401-A, Sieve Analysis of Fine and Coarse Aggregate"

    ± 3%

    Sand Equivalent

    "Tex-203-F, Sand Equivalent Test"

    ± 10



  • Portland Cement Concrete Complete Mixture

    Procedure

    Texas Test Method

    Tolerance

    Flexural Strength Compressive

    'Tex-448-A, Flexural Strength of Concrete Using Simple Beam Third-Point Loading"

    "Tex-418-A, Compressive Strength of Cylindrical Concrete Specimens"

    20% of the mean*

    Slump

    "Tex-415-A, Slump of Portland Cement Concrete"

    ± 1.0"

    Entrained Air

    "Tex-414-A, Air Content of Freshly Mixed Concrete by the Volumetric Method"

    "Tex-416-A, Air Content of Freshly Mixed Concrete by the Pressure Method"

    ± 1%

    *The difference between compared test results shall not exceed the indicated percentage of the mean of the compared test results - the mean being the average of the two test results.



  • Asphaltic Concrete Coarse Aggregate

    Procedure

    Texas Test Method

    Tolerance

    Gradation:

    • > No. 10
    • £ No. 10

    "Tex-200-F, Sieve Analysis of Fine and Coarse Aggregates"

    • ± 5%
    • ± 3%

    Deleterious Material

    "Tex-217-F, Determining Deleterious Material and Decantation Test for Coarse Aggregates"

    ± 0.3 %

    Decantation

    "Tex-217-F, Determining Deleterious Material and Decantation Test for Coarse Aggregates"

    20% of the mean*

    *The difference between compared test results shall not exceed the indicated percentage of the mean of the compared test results - the mean being the average of the two test results.



  • Asphaltic Concrete Fine Aggregate

    Procedure

    Texas Test Method

    Tolerance

    Gradation (No. 10 through No. 200)

    "Tex-200-F, Sieve Analysis of Fine and Coarse Aggregates"

    ± 3%

    Bar Linear Shrinkage

    "Tex-107-E, Determining the Bar Linear Shrinkage of Materials"

    ± 2



  • Asphaltic Concrete Combined Aggregate

    Procedure

    Texas Test Method

    Tolerance

    Gradation:

    • > 5/8"
    • 5/8" through No. 200
    • Passing No. 200

    "Tex-200-F, Sieve Analysis of Fine and Coarse Aggregates"

    • ± 5%
    • ± 3%
    • ± 1.5%

    Sand Equivalent

    "Tex-203-F, Sand Equivalent Test"

    ± 10



  • Asphaltic Concrete Complete Mixture

    Procedure

    Texas Test Method

    Tolerance

    Asphalt Content

     

     

     

    "Tex-210-F, Determining Asphalt Content of Bituminous Mixtures by Extraction"

    ± 0.3%

    "Tex-228-F, Determining Asphalt Content of Bituminous Mixtures by the Nuclear Method"

    ± 0.3%

    "Tex-229-F, Combined HMAC Cold-belt Sampling and Testing Procedure"

    ± 0.3%

    "Tex-236-F, Determining Asphalt Content from Asphalt Paving Mixtures by the Ignition Method"

    ± 0.3%

    Maximum Theoretical Specific Gravity

    "Tex-227-F, Theoretical Maximum Specific Gravity of Bituminous Mixtures"

    ± 0.020

    Laboratory Molded Density

    "Tex-207-F, Determining Density of Compacted Bituminous Mixtures"

    ± 1.0%

    Laboratory Molded Bulk Specific Gravity

    "Tex-207-F, Determining Density of Compacted Bituminous Mixtures"

    ± 0.020

    Stability

    "Tex-208-F, Test for Stabilometer Value of Bituminous Mixtures"

    5 points

    Moisture

    "Tex-212-F, Determining Moisture Content of Bituminous Mixtures"

    ± 0.2 mL

    In-place Air Voids (Core)

    "Tex-207-F, Determining Density of Compacted Bituminous Mixtures"

    ± 1.0%



NOTE: The above tolerances are to be used when comparison of test results is by split samples. A tolerance of plus or minus two (2) standard deviations shall be used when comparison of test results is by proficiency samples.

Job Control test value

18

IA Test value

22

Mean

20

20% difference

4



Both values are within 20% of the mean.

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