Test Procedure Revisions

• By: TXAPA
• On: 07/01/2016 16:08:37
• In: Technical Tips

Revisions for Tex-207-F:

ï‚· Deleting Part II, “Bulk Specific Gravity of Compacted Bituminous Mixtures using Paraffin”;
ï‚· Adding guidance on how to measure core height;
ï‚· Deleting the option of using a Corelok to dry samples, as it is ineffective and can damage the machine;
ï‚· Adding an oven  on  the list of apparatus;
ï‚· Revising the scope of Part VI, “Bulk Specific Gravity of Compacted Bituminous Mixtures using the Vacuum Method”; and
ï‚· Adding the calculation for correlated joint density under Part VII, “Determining Longitudinal Joint Density using a Density-Testing Gauge.”

Revisions for Tex-204-F:

• Incorporating the content of Part III, “Mix Design for Large Stone Dense-Graded Hot-Mix Asphalt Mixtures using the Superpave Gyratory Compactor,” into Part I, “Mixture Design for Dense-Graded Hot-Mix Asphalt Mixtures by Weight,” and replacing Part III with a reference to Part I;
• Adding thin overlay mixtures (TOM) to Part I;
• Updating examples that are designed using the new Excel worksheet;
• Adding a note requiring a blend design in permeable friction course rubber (PFCR) mixtures and stone-matrix asphalt rubber (SMAR) mixtures;
• Adding a note referencing Tex-226-F for determining the indirect tensile strength of samples;
• Adding guidance on how to select optimum asphalt content (OAC) for PFC mixtures;
• Adding an equation to differentiate between design and production VMA;
• Deleting Part VII, “Mix Design for Stone-Matrix Asphalt Rubber (SMAR) Mixtures,” and adding it to Part VI, “Mix Design for Stone-Matrix Asphalt (SMA) Mixtures”; and
• ï‚· Adding Part VIII, “Mix Design for Thin Bonded Wearing Course Mixtures” (previously Tex-247-F)

Revisions for Tex-205-F:

"Laboratory Method of Mixing Bituminous Mixtures” has been revised to remove the curing protocol.

Revisions to Tex-221-F"

"Sampling Aggregate for Bituminous Mixture, Surface Treatments, and LRA,” include:

• Modifying the definition of nominal maximum aggregate size to be consistent throughout the Department's flexible pavements test procedures;
• Updating sampling methods to match Tex-400-A, including;
  • o Sampling for stockpiles with only coarse or fine aggregate, plus sampling for stockpiles that contain both coarse and fine gradations;
  • o Cutting stockpiles using a front-end loader; and
  • o Sampling using a shovel; and
• Allowing a Department representative to sample rather than limiting to CST/M&P personnel.

Revisions for Tex-224-F, “Determining Flakiness Index,” has been revised to update the link to the Site Manager template and make editorial changes throughout.