450 Rigid Pavement

451 Reinforced Portland Cement Concrete Pavement
452 Plain Portland

1. Specification:

Sections 451.02, 452.02, 703.02, 702.13 C&MS.

2. Sampling and/or Inspection Requirements:

Use pre-qualified or certified component materials listed on OMMís website at:  http://www.dot.state.oh.us/Divisions/ConstructionMgt/Materials/Approved-List/Pages/default.aspx .  Sample as required by the individual materials.

Job Control Samples:

Gravel and limestone for use in Items 451 and 452, other than sizes 7, 78 or 8, have additional freeze-thaw requirements.  Verify that the aggregate source has been tested and passed the freeze thaw requirements.  A list of freeze thaw approved aggregates and dates thru which they are approved can be found on OMMís Aggregate information list at http://www.dot.state.oh.us/Divisions/ConstructionMgt/Materials/Pages/AggregateInformation.aspx .  If the aggregate does not appear on the list, it must be submitted to OMM for testing.

If a sample is needed for freeze-thaw tests, it shall be taken at the source and placed in aggregate bags furnished by the Department. Samples shall consist of 4 bags of the proposed aggregate. One bag shall be tested for gradation at the District lab and sent to the OMM Aggregate Section. The remaining bags shall be sent to OMM Aggregate Section and will be forwarded to OMM Concrete Section for testing and analysis.

Freeze-thaw samples shall be sent at least 90 days prior to intended use, and shall be accompanied by a TE-31. If samples require completion of testing at OMM, update the Responsible Location with "TL" and Lab with the appropriate Lab code "AG". The TE-31 will have the Sample ID of the sample tested by the District.

 Production Control:

Concrete should be proportioned, sampled and tested in accordance with Item 499 and recorded on Form TE-45.  Sample and test temperature, air, slump and yield.

The Determination to open pavement to traffic is based on attainment of an acceptable modulus of rupture. Do not allow mechanical equipment upon pavement for 7 days or until beam achieve a modulus of rupture of 600 psi (4.2 MPa). Finishing equipment may be permitted onto pavement after 3 days and after a modulus of rupture of 500 psi (3.5 MPa). (Field)

Make two (2) 6" x 6" x 4" beams for every 7500 yds2 (6300 m2), or fraction thereof incorporated each day.

Determination of price adjustment(s) shall be based on coring for pavement thickness. Core locations shall be determined per Supplement 1064. Project personnel shall witness the core procedure performed by the Contractor and measure or witness the measurement of the cores and record the thickness on the worksheet found in Supplement 1064. If a core is found to be deficient, take additional cores as per 1064.03 section 6K.

A separate worksheet should be used for different design thickness, type or JMF number. Refer to TAS Manual at OMM website for on-line instruction of core data input. (Field)

3. Methods of Tests

Freeze-Thaw: S 1024, ASTM C666, Procedure B (OMM Cement and Concrete Section)

Siliceous Particles: ASTM D 3042. (OMM Aggregate and Chemical Sections)

Concrete: Section 3 of 499. Computer generated TE-45 (Field)

Modulus of Rupture: S 1023. (Field)

Pavement Thickness: AASHTO T 148, Supplement 1064 Worksheet (Field)