# Chapter 8: Acceptable Tolerance Limits for Independent Assurance

Anchor: #CEGDIGGI## 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*

- 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.