Appendix 3-2

January 29, 2016

 

PCC Paving Verification Responsibilities

Duty

Task

Performed By/
Required Cert

Minimum Frequency

1.  Sample and test aggregate gradations (Fine, Coarse, and Intermediate)

•Obtain independent sample per Materials IM 301.
•Test per Materials IM 302 and 306.

Construction
Sampling AGG I
Testing - AGG II

Sample 1/day
Test 1st day and 1/week
(QM-C Test 1st day and 2/week)

2.  Verify aggregate quality.

•Obtain independent sample and submit to Central Materials (Coarse and Intermediate).

Sampling - District Materials          AGG II

1/100,000 square yards

Testing - Office of Materials

3.  Verify cementitious.

•Obtain independent sample and submit to Central Materials (Portland Cement, Fly Ash, and Ground Granulated Blast Furnace Slag).

Sampling - District Materials
PCC II

1/100,000 square yards

Testing - Office of Materials

4.  Verify admixtures.

•Obtain independent samples and submit to Central Materials.

Sampling - District Materials
PCC II

1/producers lot

Testing - Office of Materials

5.  Verify air, Plastic

•Sample per Materials IM 327.
•Test per Materials IM 318.

Construction
PCC I

1/700 cubic yards  - Central Batch

1/100 cubic yards  - Ready Mix

6.  Slump, Hand Finish or Std. Fixed Form Only

•Sample per Materials IM 327.
•Test per Materials IM 317.

Construction
PCC I

1/700 cubic yards  - Min. 1/pour

7.  Verify reinforcement.

•Obtain independent samples and submit to Central Materials.

Sampling - District Materials
PCC II

Varies - Check IM 204

Testing - Central Materials

8.  Verify thickness

•Obtain core locations from District Materials
•Witness core drilling
•Secure and measure cores per Article 2301.05, A and Materials IM 347

Construction
PCC I

1/2000 square yards

9.  Verify smoothness.

•Randomly select segments and measure smoothness per Materials IM 341.
•Report results and compare to contractor's results.
•Check tolerance per IM 216.

District Materials
PROF

10% of project

 

PCC Paving Independent Assurance Responsibilities

Duty

 

 

Minimum Frequency

Task

Performed By/
Required Cert

Central Batch

Ready Mix

1.  Sample and test aggregate gradations (Fine and Coarse)

•Sample and test per Materials IM 204.
•Check tolerance per IM 216.

District Materials
AGG II

*1/100,000 square yards

*1/100,000 square yards

2.  Entrained Air, Plastic

•Sample and test per Materials IM 204.
•Check tolerance per IM 216.

District Materials
PCC I

*1/100,000 square yards

*1/100,000 square yards

3.  Test thickness cores

•Sample and test per Materials IM 204.
•Check tolerance per IM 216.

District Materials
PCC I

10% of project cores

10% of project cores

4.  Calibrate smoothness testing equipment

•Per Materials IM 341.

Office of Materials

Yearly

Yearly

* Systems Approach Applicable

 

 

Other Required PCC Paving Acceptance Process Responsibilities

Duty

Task

Performed By/
Required Cert.

Minimum Frequency

1. Inspect stockpiles

•Observe stockpiling procedures.
•Check for segregation.
•Check for contamination. 
•Check for degradation.
•Check for proper storage and handling of aggregates per Article 2301.02. C and Materials IM 527.

Construction
AGG II

Observe during startup and during visits

2. Concrete Grade Yield

•Compare quantity required to quantity batched and placed.

Construction
PCC II

Weekly

3.  Flexural Strength (beams) Curing and Testing

•Cast and cure per Materials IM 328.
•Test per Materials IM 316.

Construction
PCC I

Observe each occurrence

4.  Maturity Curve Development and Validation

•Observe maturity curve development per Materials IM 383.
•Observe casting and curing of beams.
•Observe testing of beams.
•Observe maturity meter readings at time of beam breaks.
•Review Maturity - Strength Development MOR - CPL form.

•Review Maturity - Field Data form.
•Review Validation of Maturity Curve form.

Construction/PCC I



District Materials Engr.

Construction/PCC I
District Materials Engr.

When available



Review each curve for each mix.
Review each form.
Review each validation.

5.  Field Maturity Testing

•Observe placement of maturity probes per Materials IM 383.
•Observe contractor maturity meter readings

Construction
PCC I

If using thermal meter, observe a temperature reading after first day and weekly thereafter

6.  Test Equipment

•Inspect test equipment to ensure in good working order and lab has been qualified.

Construction
PCC I & AGG II

During startup and Wwhen problems arise

7.  Audit Checks and Test results in Plant Book

•Check for proper completion of Daily Plant Checklist and Plant Site Inspection List.
•Observe beam break results (when used for pavement opening strength).
•Observe record of test results for moistures and specific gravities.

Construction
PCC II

Weekly

8.  Material certifications

Check certifications for:
•Cement
•Fly Ash
•GGBFS (Slag)
•Aggregates
•Admixtures

Construction
PCC II

During visits

9.  Observe aggregate moisture and specific gravitity testing

•Observe CPI perform test in accordance with Materials IM 307 and IM 308.

Construction
PCC II

Central Batch - Once during first week of production
Ready Mix - 1/project (structural or paving)

10.  Plant proportion control

•Observe delivery tolerance.
•Observe scale sensitivity.
•Observe admixture dispenser operation.
•Check for proper batch proportions on computer generated or hand written batch tickets

Construction
PCC II

Central Batch - Once during first week of production

11.  Observe mix times and number of revolutions

•Per Article 2001.21.

Construction
PCC II

Central Batch - During visits

12.  Audit Daily Diary

•Review for proper recording of events.

Construction
PCC II

During visits

13.  Plant Reports

•Check for proper project and mix identification.
•Check for dates and report number.
•Review batch weights and aggregate gradations.
•Check materials brands and sources.
•Check for correct concrete and cement totals (daily, weekly, and to date).
•Check for appropriate Plant Inspector signature or initials.
•Sign report after review.
•Check for hard copy or electronic backup of files

Construction
PCC II

Daily/Weekly

14.  Inspect Transit Mixers

•Inspect for buildup in drum per Article 2001.21 B.
•Inspect for fin wear or broken fins per Article 2001.21 B.
•Check for current truck certification per Article 2001.21 B.

Construction
PCC II

1/Month

15.  Monitor agitors & dump trucks for properly cleaned dump box

•Check for properly cleaned dump box

Construction
PCC I

Daily

16.  Inspect plant facility

•Observe plant calibration to assure compliance with Materials IM 527
•Check lab qualifications. 
•Inspect test equipment.

District Materials
PCC II

Central Batch - Startup
Ready Mix - Yearly