Listed below are recent changes to AASHTO and/or OHD L procedures included in the OHCMTCB training and certification process. The most recent changes affected procedures for Aggregates, Materials Sampling & Testing, Asphalt, Concrete, and Soils.



AASHTO T 27 - Sieve Analysis of Fine and Coarse Aggregate

AASHTO T 248 - Reducing Samples of Aggregate to Testing Size


AASHTO T 85 - Specific Gravity and Absorption of Coarse Aggregate

AASHTO T 87 is now AASHTO R 58

AASHTO T 88 - Particle Size Analysis of Soils

AASHTO T 89 - Liquid Limit

AASHTO T 90 - Determining the Plastic Limit and Plasticity Index of Soils

*AASHTO T 310 - Density and Moisture by Nuclear Gauge



AASHTO T 30 - Mechanical Analysis of Extracted Aggregate

AASHTO T 312 - Superpave Gyratory

AASHTO R 47- Reducing Samples of Hot Mix Asphalt to Testing Size

*OHD L-14

OHD L-45



*AASHTO T 22 - Compressive Strength

  • Changes were made to sections 6.2 and through
  • *AASHTO T 23 - Making and Curing Concrete Test Specimens in the Field

    *AASHTO T 119 - Slump

    *AASHTO T 152 - Air Content by Pressure Meter

    *AASHTO T 309 has been replaced by ASTM C1064

    *Included in Materials Sampling & Testing certification.