Test Procedures

Send comments to Chuck Fuller or Corey Schwarz by November 13, 2020

The following test procedures, attached for your review, have been recommended by the Texas Department of Transportation and await industry comments.

Tex-928-K “Verifying Cameras and Thermometers,” (Spec Committee No. Tex-928-K-20209-5)

The primary revision to the test procedure is:
  • changes were necessary due to proprietary information related to the accuracy of measurements that could be obtained to meet tolerances.

If you have any questions, contact Chuck Fuller or Corey Schwarz  


Send comments to Chuck Fuller or Corey Schwarz by November 13, 2020

The following test procedures, attached for your review, have been recommended by the Texas Department of Transportation and await industry comments.

Tex-200-F “Sieve Analysis of Fine and Coarse Aggregate,” (Spec Committee No. Tex-200-F-202010-3)

The primary revision to the test procedure is:
  • editorial, corrected section references.
Tex-206-F “Compacting Specimens Using the Texas Gyratory Compactor (TGC),” (Spec Committee No. Tex-206-F-202010-4)

The primary revisions to the test procedure are:
  • clarify curing and compaction temperatures vs. discharge temperatures.
  • specify container for shipping HMA,
  • standardize curing protocol with same language as Tex-241-F “Compacting Bituminous Specimens Using the Superpave Gyratory Compactor (SGC),” to ensure proper aging,
  • modify time and temperature to place molds in oven for uniformity across labs,
  • additional guidance in procedure for clarification, and
  • report results to nearest 0.001.
Tex-226-F “Indirect Tensile Strength Test,” (Spec Committee No. Tex-226-F-202010-5)

The primary revisions to the test procedure are:
  • tighten density tolerance to ± 0.5% instead of ± 1.0%,
  • room temperature is now 75 ± 5°F instead of 77 ± 3°F since this covers a wider range and is more realistic.
  • added 6,000 lb. load cell in Article 2., “Apparatus” to conform to language in Tex-237-F
  • “Minimum Standards for Acceptance of a Laboratory for Hot Mix Testing,” and clarified procedural steps.
Tex-227-F “Theoretical Maximum Specific Gravity of Bituminous Mixtures,” (Spec Committee No. Tex-227-F-202010-6)

The primary revision to the test procedure is:
  • rice test allowed 10 min. or 15 min. We have now stated 15 min. ± 15 sec. to standardize.
Tex-237-F “Minimum Standards for Acceptance of a Laboratory for Hot Mix Testing,” (Spec Committee No. Tex-237-F-202010-7)

The primary revisions to the test procedure are:
  • revising to ensure procedures are referenced correctly and
  • revising to ensure equipment/process matches the parent test procedure.
Tex-241-F “Compacting Bituminous Specimens Using the Superpave Gyratory Compactor (SGC),” (Spec Committee No. Tex-241-F-202010-8)

The primary revisions to the test procedure are:
  • editorial,
  • specifying material thickness for different sized samples to ensure consistent curing,
  • specify a “material handling chute” to reduce segregation,
  • procedure to minimize segregation when loading SGC mold with material,
  • modifying curing protocol to ensure samples are not over cured, and
  • report results to nearest 0.001.
Tex-242-F “Hamburg Wheel-Tracking Test,” (Spec Committee No. Tex-242-F-202010-9)

The primary revisions to the test procedure are:
  • added a section with guidance for TBWC mixtures,
  • tighten density tolerance to ± 0.5% instead of ± 1.0%,
  • room temperature is now 75 ± 5°F instead of 77 ± 3°F since this covers a wider range and is more realistic,
  • clarification on how to properly cut samples to avoid excessive gaps,
  • added a section to discuss stripping and how to recognize it (pictures included in procedure), and
  • added reporting section to include stripping information.
Tex-244-F “Thermal Profile of Hot Mix Asphalt,” (Spec Committee No. Tex-244-F-202010-10)

The primary revisions to the test procedure are:
  • major revamp and updates:
    • Thermal Camera:
      • match test procedure with certification program at TxAPA,
      • include 2’ in the analysis (entire pavement width): removal of 2’ board,
      • simplify test procedure, and add spotter for safety, and
      • include paver stops in the analysis.
    • Thermal Imaging System:
      • 2’ offset is not excluded (same as before),
      • include paver stops in the analysis, and
      • open up the specification to allow for other commercially available systems to
      • provide thermal profiles.
Tex-245-F “Cantabro Loss,” (Spec Committee No. Tex-245-F-202010-11)

The primary revisions to the test procedure are:
  • tighten density tolerance to ± 0.5% instead of ± 1.0%,
  • room temperature is now 75 ± 5°F instead of 77 ± 3°F since this covers a wider range and is more realistic, and
  • for clarification, state to perform test on one sample at a time.
Tex-246-F “Permeability of Water Flow Through Hot Mix Asphalt,” (Spec Committee No. Tex-246-F-
202010-12)


The primary revisions to the test procedure are:
  • added language for TWFC and TOM and
  • removed Note 1 since limits should be addressed in the specification, not the test procedure.
Tex-248-F “Overlay,” (Spec Committee No. Tex-248-F-202010-13)

The primary revisions to the test procedure are:
  • updated definitions for CFE and CPR,
  • added a Note with examples of some recommended epoxies
  • updated formula, there were some incorrect units, updated to more easily convert, and
  • updated Article 8.,“Report.”
Tex-249-F “Shear Bond Strength Test,” (Spec Committee No. Tex-249-F-202010-14)

The primary revisions to the test procedure are:
  • clarify that we only require two samples now, not three,
  • modify language to standardize with our other performance tests, and
  • minimum thickness below bonded surface is now 3 in. instead of 1.5 in.
Tex-252-F “Methylene Blue,” (Spec Committee No. Tex-252-F-202010-15)

The primary revisions to the test procedure are:
  • added Class B balance for producing methylene blue solution,
  • requires wash water to be evaporated instead of decanted, and
  • added a Note for accelerating the test for specification limit pass/fail.

If you have any questions, contact Chuck Fuller or Corey Schwarz  


Request for TXAPA Comments
Send comments to Chuck Fuller or Corey Schwarz by September 11, 2020


Notice of Test Procedure Approved for Statewide Use
This test procedure has been approved for statewide use effective August 2020. 

The test procedure is:

  • new, added to the Soils and Aggregates 100 Series and
  • determines the moisture susceptibility of untreated, granular flexible base materials.

If you have any questions, contact Chuck Fuller or Corey Schwarz 


Response to TXAPA comments and request for additional commentsPlease email Chuck Fuller or Corey Schwarz with your comments or call TXAPA at (512) 312-2099 with questions. Please provide your comments on or before the deadline of July 23, 2020.
  • TEX-244-F - Thermal Profile of Hot Mix Asphalt

Revisions to TEX-500-C and TEX-501-C
​​Request for TXAPA comments due May 20, 2020.
  • TEX-198-E - Minimum Standards for Testing Soils and Flexible Base Materials
  • TEX-498-A - Minimum Standards For Acceptance of a Laboratory for Concrete and Aggregate Testing

Request for TXAPA comments due May 1, 2020. 
  • TEX-400-A - Sampling Aggregate, Flexible Base, Stone, Gravel, Sand, and Mineral Aggregates, and Stone Riprap
  • TEX-244-F - Thermal Profile of Hot Mix Asphalt

​Tex-500-C, “Sampling Bituminous Materials, Pre-Molded Joint Fillers, and Joint Sealers”
TEX-200-F Procedure (January 2020) - Sieve Analysis of Fine and Course Aggregates
TEX-201-F Procedure (January 2020) - Bulk Specific Gravity and Water Absorption of Aggregate
Corrections to TEX-251 and TEX-252 (October 2019)
  • TEX-251-F - Obtaining and Trimming Cores of Bituminous Mixtures
  • TEX-252-F - Determining the Presence of Harmful Clays Using Methylene Blue

TEX-206-F Procedure (July 2019) - Compacting Specimens Using the Texas Gyratory Compactor (TGC)
TEX-207-F Procedure (July 2019) - Determining Density of Compacted Bituminous Mixtures
TEX-226-F Procedure (July 2019) - Indirect Tensile Strength Test
TEX-227-F Procedure (July 2019) - Theoretical Maximum Specific Gravity of Bituminous Mixtures
TEX-236-F Procedure (July 2019) - Determining Asphalt Content from Asphalt Paving Mixtures by the Ignition Method
TEX-241-F Procedure (July 2019) - Compacting Bituminous Specimens Using the Superpave Gyratory Compactor  (SGC)
TEX-242-F Procedure (July 2019) - Hamburg Wheel-Tracking Test
TEX-245-F Procedure (July 2019) - Cantabro Loss


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