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Publication Number: FHWA-HRT-04-046
Date: October 2004

Appendix D: Summaryof AGency PCC Specifications Received

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Kansas

Quality Control

The contractor is responsible for providing a QC plan that must be approved by the engineer prior to construction and providing qualified personnel and equipment to conduct QC testing. The contractor must allow the engineer access to the laboratory to observe any and all testing procedures, calculations, test documentation, and plotting of results. At a minimum, values for percent air, slump, unit weight, and gradation must be plotted on control charts. QC tests include aggregate gradation, slump, air content, unit weight/yield, compressive strength, flexural strength, material passing #200, percent moisture in aggregate, temperature, and density of fresh concrete. Cores are to be tested once per each sublot, where a sublot is the day's lot production divided into five sublots of equal surface area.

Quality Assurance

QA is the responsibility of the engineer and is accomplished through verification testing by Kansas DOT. The engineer conducts verification testing on aggregate gradation, slump, air content, unit weight/yield, compressive strength, flexural strength, material passing #200, percent moisture in aggregate, temperature, and density of fresh concrete.

Acceptance

Acceptance or rejection of material is based on the contractor's QC tests as verified by the engineer's tests. Should the results of the two tests disagree, the engineer's results will be used to determine acceptance or rejection. If the test results are disputed, referee testing will be conducted on additional samples by an independent laboratory. The referee test results will then be used for acceptance.

Pay Factors

Pay factors are assigned for smoothness, compressive strength, and thickness. The smoothness pay factor is based on the California profilograph. Values for this pay factor were not provided. Pay factors for thickness and compressive strength are based on a quality index for each characteristic. The quality index (Qi) is calculated as follows:

Equation 64.  The quality index, Q subscript I, equals the average measured thickness or compressive strength of all cores in the lot, X subscript AVG, minus the lower specification limit, LSL, all divided by the standard deviation of all thickness or compressive strength samples for the lot, S.     (64)

where: Xavg = average measured thickness or compressive strength of all cores in the lot
LSL = lower specification limit
S = standard deviation of all thickness or compressive strength samples for the lot

The quality index is then used to calculate a pay adjustment factor according to the following table:

Concrete Thickness and Compressive Strength Pay Adjustment

Table 135. Kansas concrete thickness and comprehensive strength pay adjustment.

Quality Index Pay Adjustment Factor
> 1.71 103%
1.56-1.71 102%
1.41-1.55 101%
1.26-1.40 100%
0.00-1.25 *
< 0 50%

*Calculated as P = 60 + (Q × 32)

A composite pay factor for the lot is then calculated as Pc = (Pt × Ps)/100.

QC/QA Tests for Kansas

Table 136. Kansas QC/QA tests.

Test Sampling Location QC Testing by Contractor Verification Testing by Kansas DOT
Aggregate gradation Feed bins One test per 1000 tons One per 30,000 tons
Slump Truck One per 500 yd3 or minimum of one per day One per day
Air content (plastic concrete) Truck One per 500 yd3 or minimum of one per day One per day
Cores Roadway One per sublot One per lot
Temperature Truck One per 500 yd3 One per day
Beams Truck As required for opening to traffic One set per week
Unit weight Truck One per 500 yd3 or minimum of one per day One per day
Material passing #200 (washed) Feed bins One test per 1000 tons One per week
Smoothness Roadway NA NA
Thickness Roadway One per sublot One per lot
Density of fresh concrete Roadway One complete transverse profile initially, then one per ½ day One per week

NA = Not applicable
1 cubic yard (yd3) = 0.765m3, 1 ton = 0.907 Mg

Illinois

Quality Control

The contractor is responsible for providing a QC plan that must be approved by the engineer prior to construction and providing qualified personnel and equipment to conduct QC testing. The contractor must allow the engineer access to the laboratory to observe any and all testing procedures, calculations, test documentation, and plotting of results. At a minimum, the contractor must have a level 1 PCC technician at the job site, as well as a level 2 PCC technician at the plant during mixture production and placement. QC tests include aggregate gradation, slump, air content, unit weight/yield, temperature, and compressive or flexural strength.

Quality Assurance

The engineer is responsible for all QA testing on split samples. The split sample is one of two equal portions of a field sample. At the engineer's discretion, he/she may also obtain independent field samples for testing. The results of the QA tests will be made available to the contractor as soon as they are completed. In the event that the contractor's or the engineer's tests for air content and strength are not within specification limits, referee testing will be conducted by Illinois DOT or by a mutually agreed upon laboratory at the contractor's option.

Acceptance

Acceptance of the material is based on: contractor's compliance with all contract documents for QC, validation of the contractor's QC test results by comparison with the engineer's QA tests, comparison of the engineer's QA test results with the specification limits using samples independently obtained by the engineer, and referee test results for unresolved failing tests obtained by the contractor or the engineer.

Pay Factors

Pay factors are assigned for smoothness and thickness.

QC/QA Tests for Illinois

Table 137. Illinois QC/QA tests.

Test Sampling Location QC Testing Frequency by Contractor Verification Testing Frequency by Illinois DOT (split sample)
Aggregate gradation At plant from bins or stockpiles One per 2500 yd3 First test performed by the contractor at the beginning of the project, and then a minimum of 10% of the tests required by the contractor
Slump Job site One per 500 yd3 or minimum of one per day First three tests performed by the contractor at the beginning of the project, and then a minimum of 10% of the tests required by the contractor
Air content (plastic concrete) Job site One per 100 yd3 or minimum of one per day First three tests performed by the contractor at the beginning of the project, and then a minimum of 10% of the tests required by the contractor
Strength Laboratory One per 1250 yd3 or minimum of one per day First test performed by the contractor at the beginning of the project, and then a minimum of 10% of the tests required by the contractor
Smoothness Job site NA NA
Thickness Job site NA NA
Temperature Plant As needed to control production NA

NA = Not applicable
1 yd3 = 0.765 m3

Iowa

Quality Control

The contractor is responsible for providing a QC plan that must be approved by the engineer prior to construction and providing qualified personnel and equipment to conduct QC testing. The contractor must allow the engineer access to the laboratory to observe any and all testing procedures, calculations, test documentation, and plotting of results. At a minimum, the contractor must perform QC tests on the unit weight of plastic concrete, aggregate gradation, flexural strength, air content, slump, and water-to-cement ratio.

Quality Assurance

The engineer is responsible for QA and acceptance of the material. QA is accomplished by conducting verification sampling and testing, observing the QC sampling and testing, taking additional samples for testing at any time, and monitoring control charts. Results of the verification tests will be made available to the contractor as soon as they are completed. Verification testing frequency will be at the discretion of the engineer, but must not be less than 10 percent of the QC tests. Verification testing will be conducted on those properties tested for QC.

Acceptance

Acceptance of the material will be based on the contractor's QC test results as long as the results agree with Iowa DOT's test results. Acceptance for thickness will be based on samples tested by the engineer. Coring for thickness will be on a lot-by-lot basis, where 1 day's production is considered a lot, which is divided into three equal sublots for testing.

Pay Factors

Pay factors are assigned for smoothness, thickness, and flexural strength. The pay factor for smoothness was not provided. The pay factor for thickness is determined using the following table:

Table 138. Iowa pay factors for thickness.

Thickness Index* Range (mm) Percent Payment Thickness Index* Range (mm) Percent Payment
0.00 or more 103 -13.98 to -15.24 91
-0.01 to -1.27 102 -15.25 to -16.51 90
-1.28 to -2.54 101 -16.52 to -17.78 89
-2.55 to -3.81 100 -17.79 to -19.05 88
-3.82 to -5.08 99 -19.06 to -20.32 87
-5.09 to -6.35 98 -20.33 to -21.59 86
-6.36 to -7.62 97 -21.60 to -22.86 85
-7.63 to -8.89 96 -22.87 to -24.13 84
-8.90 to -10.16 95 -24.14 to -25.40 83
-10.17 to -11.43 94 -25.41 to -26.67 82
-11.44 to -12.70 93 -26.68 to -27.94 81
-12.71 to -13.97 92 -27.95 or less 80

* The thickness index is determined as follows: TI = (Xavg - S) - T, where Xavg = mean core length for the section,
S = core length standard deviation for the section, and T = design thickness. Pavement, represented by cores, which is deficient from the design thickness by 25 mm or greater shall be replaced. Payment for thickness will be based on the percentage of the contract price.

The pay factor for flexural strength is determined by subtracting 1 standard deviation from the mean strength according to the following table. The average strength is based on three beams.

Table 139. Iowa pay factors for flexural strength.

Strength (lbf/inch2) Pay Factor
< 450 Remove
450-474 70
475-499 75
500-524 80
525-549 85
550-559 90
560-569 92
570-579 94
580-589 96
590-599 98
600-624 100
625-649 101
650-674 102
≥ 675 103

1 lbf/inch2 = 6.89 kPa

The composite pay factor was not provided; however, it appears to be the individual pay factors multiplied together times the contract price.

QC/QA Tests for Iowa

Table 140. Iowa QC/QA tests.

Test Sampling Location QC Testing Frequency by Contractor Verification Testing Frequency by Iowa DOT Acceptance by Iowa DOT
Aggregate gradation Feed bins Two per day At least 10% of QC tests Verification of QC by Iowa DOT's tests
Air content (plastic concrete) Truck First load and then one per 500 yd3 At least 10% of QC tests Verification of QC by Iowa DOT's tests
Water-to-cement ratio Truck Two per day At least 10% of QC tests Verification of QC by Iowa DOT's tests
Unit weight of plastic concrete Truck One per day At least 10% of QC tests Verification of QC by Iowa DOT's tests
Thickness Roadway NA NA Five cores per sublot
28-day flexural strength Truck One per 1000 yd3 At least 10% of QC tests One set of three beams as determined by engineer

NA = Not applicable
1 yd3 = 0.765 m3

New Jersey

Quality Control

All plants producing concrete for New Jersey DOT projects shall have a QC plan in place, as outlined in "Requirements for a Portland Cement Concrete Quality Control Plan," June 25, 1998. A QC technician who is certified by the American Concrete Institute as grade I must be available during the production of concrete for any New Jersey DOT project. QC tests for slump, air content, compressive strength, aggregate gradation, and temperature are conducted at the plant. Concrete provided by any producer who has met applicable design, control, and acceptance testing requirements will be presumed to be in compliance with New Jersey DOT's standards at the time of delivery. However, the presumption will not waive the engineer's right to impose pay adjustments.

Acceptance

Acceptance of the material is determined through acceptance testing by New Jersey DOT. Acceptance will be based on the results of the slump, strength, and air content tests. Acceptance for compressive strength, slump, and air content will be on a lot-by-lot basis, with a lot being equal to 1 day's production. Acceptance tests will be conducted at a frequency of five per lot.

Pay Factors

Pay factors are assigned for air content and compressive strength. The pay factor for compressive strength and air content will be determined by the percent defective within the lot. Percent pay adjustments (PPA) are calculated using the following two equations:

Equation 65.  For PD less than 50, percent pay adjustments, PPA, equals 3.0 minus 0.3 times PD.      (65)

Equation 66.  For PD greater than or equal to 50, PPA equals 26.0 minus 0.76 times PD.      (66)

North Carolina

Quality Control

The contractor is responsible for providing a QC plan that must be approved by the engineer prior to construction. During the preconstruction meeting, the contractor and the engineer will determine the types and frequencies of testing that are required to produce materials that meet the specifications. The contractor must also provide qualified personnel and equipment to conduct QC testing. The contractor must allow the engineer access to the laboratory to observe any and all testing procedures, calculations, test documentation, and plotting of results. At a minimum, the contractor must have a technician who is certified to develop the concrete design, control the gradation and quality of the aggregates, and perform the required tests. QC testing must be conducted for aggregate gradation, air content, slump, compressive strength, profile index, and thickness.

Acceptance

Acceptance of the material is determined through acceptance testing by North Carolina DOT. Acceptance will be based on the results of the slump, flexural strength, thickness, profile index, and air content tests. Acceptance for slump and air content will be determined at the point of placement at a frequency determined by the engineer. A sample will be obtained immediately after the concrete has been discharged onto the road. Acceptance for thickness and flexural strength will be determined on a lot-by-lot basis, where a lot is 5333.3 yd3 and subsequently divided into four equal sublots. For each sublot, a set of two beams shall be used to test flexural strength. Additionally, two cores shall be taken from each lot to test for thickness. Acceptance testing of the longitudinal profile of the finished pavement must be performed by the contractor in the presence of the engineer.

Pay Factors

Pay factors are assigned for profile index, thickness, and flexural strength. The pay factor for the profile index was not provided. The pay factor for thickness is determined from the following table:

Table 141. North Carolina pay factors for thickness.

Deficiency (inches) Percentage of Price Allowed
0.00-0.20 100
0.21-0.30 80
0.31-0.40 72
0.41-0.50 68
0.51-0.75 57
0.76-1.00 50

1 inch = 25.4 mm

The pay factor for flexural strength is determined from the following table:

Table 142. North Carolina pay factors for flexural strength.

Pay Factor Level Lower Acceptance Limits
Number of Tests in Lot
3 4 5 6
1.05 550 + 0.60R 550 + 0.66R 550 + 0.66R 550 + 0.66R
1.00 550 + 0.58R 550 + 0.54R 550 + 0.50R 550 + 0.46R
0.95 550 + 0.36R 550 + 0.27R 550 + 0.23R 550 + 0.21R
0.70 550 550 550 550

Note: R is the difference between the high and low tests in the lot. If multiple deficiencies occur, the payment is determined by successively multiplying the contract price by the appropriate factor indicated for each deficiency.

QC/QA Tests for North Carolina

Table 143. North Carolina QC/QA tests.

Test Sampling Location QC Testing Frequency by Contractor Acceptance Testing Frequency by North Carolina DOT
Aggregate gradation Feed bins Contractor's discretion as needed for control NA
Slump Roadway after discharge Two per day Engineer's discretion
Air content (plastic) Roadway after discharge Two per day Engineer's discretion
Profile index Roadway Three profiles: Two at 3.5 ft inside the outer wheel path and one along the longitudinal joint Based on QC test
Thickness Roadway (coring) Contractor's discretion as needed for control Two cores per lot
Flexural strength Truck NA Two beams per sublot (average)
Compressive strength Roadway (coring) Contractor's discretion as needed for control NA

NA = Not applicable
1 ft = 0.305 m

Oregon

Quality Control

The contractor is responsible for providing a QC plan that must be approved by the engineer prior to construction and providing qualified personnel and equipment to conduct QC testing. The contractor must allow the engineer access to the laboratory to observe any and all testing procedures, calculations, test documentation, and plotting of results. At a minimum, the contractor must have a concrete control technician (CCT) at the plant or job site and a QC technician (QCT) at the job site. QC tests include aggregate gradation, slump, air content, water-to-cement ratio, unit weight/yield, temperature, and compressive strength. QC tests will be conducted on a lot-by-lot basis, where a lot is the total amount of concrete produced for each mix design. This lot will then be divided and tested by the sublot, where a sublot is equal to 75 m3 of material.

Quality Assurance

The engineer is responsible for all QA. Assurance is accomplished through verification testing, observation of contractor sampling and testing, and additional sampling and testing conducted by the engineer. The results of the verification tests will be made available to the contractor as soon as they are completed. In the event that the contractor's or the engineer's tests are not within specification limits, they shall immediately work together to resolve the difference to avoid having the material rejected as not meeting specifications. Verification testing will be conducted on a lot-by-lot basis, where a lot is the total amount of concrete produced for each mix design.

Acceptance

Acceptance of the material is based on verification of the QC tests by Oregon DOT's tests. For aggregate acceptance, verification of the contractor's test values through check tests completed by the engineer will be used. For plastic concrete, acceptance is based on the QC tests performed by the contractor and on tests conducted by the engineer. The engineer may observe the QC tests performed by the contractor and/or conduct tests on all plastic concrete. Hardened concrete will be accepted based on the statistical analysis of the 28-day strength tests of cylinders cast by the engineer.

Pay Factors

Pay factors are assigned for smoothness, thickness, and compressive strength. The pay factor for smoothness is determined by the following equation:

Equation 67.  Bonus equals 0.00038 times the sum of 80 minus the average of the two wheel path profiles for the segment, PI, times quantity times unit price.      (67)

where: PI = average of the two wheel path profiles for the segment
Quantity = area in m2 represented by the segment
Unit price = price for the concrete shown in the bid schedule

The pay factor for thickness is determined using the following table. No additional payment will be made for pavement exceeding the minimum specification.

Table 144. Oregon pay factors for thickness.

Deficiency in Thickness (mm) Proportional Part of Contract Unit Price Allowed
0.0-5.0 100%
5.1-7.6 83%
7.7-10.1 76%
10.2-12.7 73%
12.8-19.0 63%
19.1-25.0 59%

The pay factor for compressive strength is based on statistical analysis to determine the total percent within the specification limits. This is then used to determine the pay factor for strength. In no case shall payment exceed the contract price. For pay factors less than 1.00, a pay reduction is calculated as follows:

Equation 68.  Payment equals 0.3 times the sum of PF minus 1.0, times the contract bid price.      (68)

A weighted pay factor (WPF) is determined by multiplying PF by a weighting factor fI provided in the contract. The method for determining a composite pay factor (CPF) for these items uses the following formula:

Equation 69.  CPF equals sigma WPF divided by sigma F subscript I.     (69)

where: WPF = weighted pay factor
fI = weighting factor

QC/QA Tests for Oregon

Table 145. Oregon QA/QC tests.

Test Sample Location QC Testing Frequency by Contractor Verification Testing by Oregon DOT Acceptance by Oregon DOT
Aggregate gradation Feed bins One per shift or 500 Mg One per shift or 500 Mg Verification of QC by Oregon DOT's test
Slump Roadway after discharge One per sublot One per lot Verification of QC by Oregon DOT's test
Air content (plastic) Roadway afterdischarge One per sublot One per lot Verification of QC by Oregon DOT's test
Water-to-cement ratio Roadway after discharge One per sublot One per lot Verification of QC by Oregon DOT's test
Yield Roadway after discharge One per sublot One per lot Verification of QC by Oregon DOT's test
Thickness Roadway One sticking of plastic concrete per 60 lane-meters Observation of QC test Observation of QC test
Compressive strength Cast in the field NA NA One set of four cylinders per sublot
Smoothness Roadway One pass per wheel path per 200-m segment Observation of QC test Observation of QC test
Temperature Roadway after discharge One per sublot One per lot NA

NA = Not applicable

Pennsylvania

Quality Control

The contractor is responsible for providing a QC plan that must be approved by the engineer prior to construction and providing qualified personnel and equipment to conduct QC testing. The contractor must allow the engineer access to the laboratory to observe any and all testing procedures, calculations, test documentation, and plotting of results. At a minimum, the contractor must have a certified technician to develop the concrete design, control the gradation and quality of the aggregates, and perform the required tests. QC testing must be conducted for aggregate gradation, air content, slump, compressive strength, profile index, and thickness.

Quality Assurance

QA is accomplished through independent sampling and testing by Pennsylvania DOT for air content, strength, and pavement thickness. Independent assurance testing is conducted to review the QC testing and to check the accuracy of the equipment used for acceptance testing.

Acceptance

Acceptance of the material is determined through acceptance testing by Pennsylvania DOT. Acceptance will be based on the results of the slump, strength, thickness, and air content tests. Acceptance for compressive strength and air content will be on a lot-by-lot basis, with testing conducted on sublots of 1400 yd2 (1170 m2). Acceptance for smoothness will be based on the QC profilograph test.

Pay Factors

Pay factors are assigned for profilograph, thickness, air content, and compressive strength tests. The pay factor for compressive strength and air content will be determined by the PWL for the lot. The pay factor for thickness will be determined by coring. The profile index pay factor is determined using a profilograph and assessing the index in inches per mile per lot. After determining the individual pay factors for each of the above characteristics, the lot payment is calculated using the following equation:

Equation 70.  Lot payment, L subscript P, equals contract price per lot, C subscript P, times the following: 2 times the payment percentage of the contract price for strength, P subscript S, plus 2 times the payment percentage of the contract price for depth, P subscript D, plus 2 times the payment percentage of the contract price for air content, P subscript A, divide by 500, plus the quotient of the sum of the payment percentage of the contract price for the profile, P subscript P, minus 100, divided by 100.     (70)

where: Lp = lot payment
Cp = contract price per lot
Ps = payment percentage of the contract price for strength
Pd = payment percentage of the contract price for depth
Pa = payment percentage of the contract price for air content
Pp = payment percentage of the contract price for the profile

QC/QA Tests for Pennsylvania

Table 146. Pennsylvania QA/QC tests.

Test Sample Location QC Testing Assurance Testing Acceptance Testing
Aggregate gradation Feed bins Varies: Established in QC plan NA NA
Slump Roadway after discharge One per 200 yd3 NA One per sublot
Air content (plastic) Roadway after discharge One per 200 yd3 One per two lots One per sublot
Profilograph Roadway Test as soon as concrete is cured NA Based on QC test
Thickness Roadway One core per sublot One core per two lots Four cores per lot
Compressive strength Cast in the field Two cylinders per sublot One cylinder per two lots Four cylinders per lot

NA = Not applicable
1 yd3 = 0.765 m3

Texas

Quality Control

The contractor is responsible for providing a QC plan that must be approved by the engineer prior to construction and providing qualified personnel and equipment to conduct QC testing. The contractor must allow the engineer access to the laboratory to observe any and all testing procedures, calculations, test documentation, and plotting of results. To complete the required testing, the contractor must provide technicians certified at levels I through IV, depending on the test being conducted. The standard lot size is 6000 yd2 (5000 m2) of surface area of PCC pavement of the same thickness. A sublot is equal to one-fifth of the surface area of a lot. If the final lot is 3000yd2 (2500 m2) or greater, it will be considered a full lot. QC must be exercised on all properties contained in the table entitled QC/QA Tests for Texas.

Quality Assurance

QA is accomplished through verification testing conducted by Texas DOT. Independent assurance testing is conducted to review the QC testing and to check the accuracy of the equipment used for verification testing.

Acceptance

Acceptance of the material is based on the QC tests and the verification tests. If the contractor's QC test results and the engineer's verification test results are not within tolerances, referee testing will be conducted. If referee tests are requested, the referee test results shall govern.

Pay Factors

Pay factors are assigned for ride quality, thickness, and flexural strength. The pay factor for flexural strength is based on the following table:

Table 147. Texas pay factors for flexural strength.

Average Flexural Strength (Three Beams) (lbf/inch2) Strength Adjustment Factor (SF)
≥ 555 1.0000
550 0.9695
545 0.9397
540 0.9106
535 0.8820
530 0.8542
525 0.8269
< 525 Remove or remain with no payment

1 lbf/inch2 = 6.89 kPa

The pay factor for ride quality was not provided. The pay factor for thickness is determined using the following table:

Table 148. Texas pay factors for thickness.

Thickness Deficiency (inches) Thickness Adjustment Factor (TF)
> 0.00-0.20 1.00
> 0.20-0.30 0.80
> 0.30-0.40 0.72
> 0.40-0.50 0.68
> 0.50-0.75 0.57

The pay adjustment factor for each lot is calculated as AF = (SF)(TF). The pay adjustment for each lot is then calculated as:

Equation 71.  Payment equals bid price, BP, times adjustment factor, AF, times the lot quantity of acceptable pavement.     (71)

where: BP = bid price
Q = lot quantity of acceptable pavement

QC/QA Tests for Texas

Table 149. Texas QC/QA tests.

Test Sample Location QC Testing by Contractor Verification Testing by Texas DOT Acceptance by Texas DOT
Mix temperature Plant One per sublot One per day Based on QC, verification, and referee, if required
Air content (plastic) Roadway after discharge One per sublot 1 per 10 QC tests Based on QC, verification, and referee, if required
Concrete unit weight Roadway after discharge One per sublot 1 per 10 QC tests Based on QC, verification, and referee, if required
Making/curing strength specimens Roadway after discharge One per sublot 1 set per 10 sublots NA
7-day flexural strength Roadway after discharge NA One per sublot Based on verification
Coarse aggregate gradation Stockpile One per stockpile per day 1 per 10 QC tests Based on QC, verification, and referee, if required
Coarse aggregate loss by decantation Stockpile One per 5 PCC production days 1 per 10 QC tests Based on QC, verification, and referee, if required
Fine aggregate gradation Stockpile One per stockpile per day 1 per 10 QC tests Based on QC, verification, and referee, if required
Fineness modulus Stockpile One per stockpile per day 1 per 10 QC tests Based on QC, verification, and referee, if required
Fine aggregate organic impurity Stockpile One per 5 PCC production days 1 per 10 QC tests Based on QC, verification, and referee, if required
Sand equivalent Stockpile One per 5 PCC production days 1 per 10 QC tests Based on QC, verification, and referee, if required
Aggregate moisture content Stockpile One per stockpile per day 1 per 10 QC tests Based on QC, verification, and referee, if required
Water-to-cement ratio Roadway after discharge One per batch Review plant printout and calibration Based on QC, verification, and referee, if required
Cement factor Roadway after discharge One per batch Review plant printout and calibration Based on QC, verification, and referee, if required
Admixture dosage Roadway after discharge One per batch Review plant printout and calibration Based on QC, verification, and referee, if required
Coring for thickness Roadway One per sublot NA NA
Measuring pavement thickness Roadway (plastic)
NA
One per sublot Based on QC, verification, and referee, if required

NA = Not applicable

Wisconsin

Quality Control

The contractor is responsible for providing a QC plan that must be approved by the engineer prior to construction and providing qualified personnel and equipment to conduct QC testing. The contractor must allow the engineer access to the laboratory to observe any and all testing procedures, calculations, test documentation, and plotting of results. At a minimum, the contractor must have the following certified personnel: aggregate technician 1, PCC technician 1A, PCC technician 2, concrete compressive strength tester, and profilograph operator 1. QC testing must be conducted on the following: aggregate gradation, material passing #200, aggregate moisture, air content, slump, temperature, thickness, profilograph, and compressive strength.

Quality Assurance

QA is accomplished through verification testing by Wisconsin DOT for air content, strength, and pavement thickness. Independent assurance testing is conducted to review the QC testing and the verification testing. The independent assurance review will be done in accordance with Wisconsin DOT's Independent Assurance program and may include: split-sample testing, proficiency sample testing, witnessing of sampling and testing, review of control charts, and requesting additional samples for testing.

Acceptance

Acceptance of the material is based on the contractor's QC test results. This method of acceptance and payment will continue until it can be shown through verification or the dispute resolution process that the contractor's test results are in error. Acceptance will be based on the results of the strength, thickness, and air content tests.

Pay Factors

Pay factors are assigned for profilograph, thickness, and compressive strength. The pay factor for compressive strength will be determined by the lot and will be based on the contractor's QC cylinders fabricated for each sublot. A lot is considered to be 1 day's production divided into equal sublots not to exceed 500 yd3 (380 m3). The pay adjustment will be based on the lot's average strength minus 1 standard deviation. The factor is a dollars per yd2 adjustment. The factor is determined from the following table:

Table 150. Wisconsin pay factors for compressive strength.

Strength (lbf/inch2) Pay Adjustment ($/yd2)
≤ 2850 -0.552
2850 to 2950 -0.527
2950 to 3050 -0.452
3050 to 3150 -0.385
3150 to 3250 -0.309
3250 to 3350 -0.234
3350 to 3450 -0.167
3450 to 3550 -0.109
3550 to 3650 -0.050
3650 to 3750 -0.000
3750 to 3850 0.067
3850 to 3950 0.125
3950 to 4050 0.167
4050 to 4150 0.201
4150 to 4250 0.226
4250 to 4350 0.242
4350 to 4450 0.259
4450 to 4550 0.268
4550 to 4650 0.268
≥ 4650 0.276

1 lbf/inch2 = 6.89 kPa, 1 yd2 = 0.836 m2

The pay factor for the profile index will be determined according to the following table:

Table 151. Wisconsin pay factors for the profile index.

Profile Index (inches/mi)Pay Adjustment per 0.1-mi Section per Lane
< 19.0+$585
19.0-25.2+$350
25.3-44.3$0
44.4-50.6-$230
≥ 50.7-$940

1 mi = 1.61 km, 1 inch/mi = 15.8 mm/km

The pay factor for thickness will be determined according to the following table:

Table 152. Wisconsin pay factors for thickness.

Average Thickness Deficiency (inches)Pay Adjustment per 250-ft Lane Length Unit
0-3/8$0
> 3/8-½-$1143
> ½-¾-$2095
> ¾-1-$2667

1 inch = 25.4 mm, 1 ft = 0.305 m

These factors are applied according to the units listed in the tables.

QC/QA Tests for Wisconsin

Table 153. Wisconsin QC/QA tests.

TestQC Testing by ContractorVerification Testing by Wisconsin DOTAcceptance by Wisconsin DOT
Material passing #200Two per dayNANA
Aggregate gradation0-1000 tons: One per day 1000-2000 tons: Two per day 2000+ tons: Three per dayNANA
SlumpOne per sublotNANA
Aggregate moistureTwo per dayNANA
Air contentOne per sublotOne per lotBased on QC test
ProfilographAs soon as concrete has cured enough for testingNABased on QC test
ThicknessTwo per 250 ftTwo per dayBased on QC test
Compressive strengthThree cylinders per sublotOne per five lotsBased on QC test
TemperatureOne per sublotNANA

NA = Not applicable
1 ft = 0.305 m, 1 ton = 0.907 Mg

 

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The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT).
The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT). Provide leadership and technology for the delivery of long life pavements that meet our customers needs and are safe, cost effective, and can be effectively maintained. Federal Highway Administration's (FHWA) R&T Web site portal, which provides access to or information about the Agency’s R&T program, projects, partnerships, publications, and results.
FHWA
United States Department of Transportation - Federal Highway Administration