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.