506PLAIN OR REINFORCED CEMENT CONCRETE PAVEMENTS, RPS

506.1DESCRIPTION—This work is construction of normal strength or HES cement concrete pavement,

plain or reinforced, on a prepared surface under restricted performance specifications (RPS).

506.2MATERIAL—Section 501.2

506.3CONSTRUCTION—Section 501.3, with the following modifications:

include but are not limited to any full width lane used for travel, passing, climbing, center turn, acceleration, deceleration, and ramps.

include, but are not limited to approach slabs, bridge decks, tapers, shoulders, medians, or other pavement surfaces as directed.

The Inspector will determine lots and sublots as specified in Section 506.3(u). Complete all surface corrections or diamond grinding / grooving if specified by the contract, before testing for pavement depth. Test pavement depth by obtaining one core from each sublot. The Inspector will determine the location of each core using PTM No. 1. Drill cores at each sublot location, according to PTM No. 606, in presence of the Inspector. Thoroughly clean the vertical surface of the core hole of laitance and loose and foreign material. Fill the holes with the mixture used to construct the course and consolidate. As an alternative, use a premixed, non-shrink grout. Provide a measuring apparatus conforming to the requirements of PTM No. 614. The Inspector will:

• determine the core length according to PTM No. 614,

• determine the average lot pavement thickness by averaging the individual sublot core thicknesses,

• accept concrete as specified in Section 506.3(u)1, and

• determine price adjustments as specified in Section 506.4(a)

Submit every tenth core, as an information sample, to the LTS where an evaluation will be made of the entrained air content according to PTM No. 623, and for 28- day compressive strength testing according to PTM No. 606. For a partial lot, the Inspector will randomly select one core, according to PTM No. 1, for testing. If the core strength is less than 3,5 00 pounds per square inch immediately perform an investigation of the concrete operations to determine the cause of the low strength. Provide a written evaluation of the problem and the proposed solution to the Department.

Unless otherwise directed in writing, as specified in Section 110.10(d)1., by the District Executive, remove and replace defective pavement determined as follows:

1/2 inch.

for compressive strength or plastic air content is less than 55%, as specified in Section 506.3(u)2.

improper joint construction, improper curing procedures, improper final finish, cracking, or honeycombing that cannot be satisfactorily repaired as determined by the Representative.

contains depressions or high points as specified in Section 506.3( o) that cannot be satisfactorily corrected as determined by the Representative.

are not met. Remove and replace a minimum of 10 feet of pavement between transverse joints of reinforced cement concrete pavements or an entire panel of plain cement concrete pavement. Longitudinal edge spall repairs are not considered satisfactory repairs for edge slu mping or spalling between adjacent lanes or outside pavement edges. Where replacement extends to an existing transverse joint, replace the joint in kind. Construct transverse joints at other locations resulting from removal of defective pavement using the methods for joining pavements as shown on the Standard Drawings.

Lots and sublots for the combined pavement characteristics of depth, strength, and air content will be determined based on the full width of pavement placement. Lots and sublots will begin at the starting point of paving and continue until 5,600 square yar ds are placed. Lots and sublots will be calculated as the work progresses and will include any pavement designated as RPS pavement. Do not combine various depth pavement into any lot or sublot. A full lot is defined as 5,600 square yards of pavement, of the same constant depth, and consists of four equal sublots of 1,400 square yards each. Combine partial lots with the last full lot or make a separate lot according to the following procedure:

• If less than 4,200 square yards remain, combine the remaining pavement with the last full lot.

• If the remaining pavement is equal to or greater than 4,200 square yards, consider the remaining pavement as a separate lot.

• Determine sublots for the last pavement lot by establishing a number of equal size sublots.

• Determine the number of sublots by dividing the area of the combined lot or partial lot by 1,400 square yards and then rounding to the nearest whole number.

• Determine the equal size of each sublot by dividing the combined lot or partial lot quantity by the number of whole sublots calculated.

• Determine lots and sublots based on the full width of pavement placement.

depth if the average core depth of the lot is more than the design thickness (D) minus 0.5 inch and not more than one individual sublot core depth is less than the design thickness minus 0.5 inch.

compliance with the specification requirements, for compressive strength and air content, on a lot -by- lot basis, as specified in Section 105 and Section 106. The Representative will determine locations where samples of plastic concrete will be lifted according to PTM No. 1. Make one compressive strength test and one test for percentage of plastic air conten t on samples from each sublot. Sublot plastic air content acceptance test results outside specification limits will be included in the determination of the PWL.

Mold acceptance cylinders at the determined sublot location. The average of the test results from two cylinders, made from the same sample, tested according to PTM No. 604, will constitute the 28-day compressive strength. Cure test specimens according to Subsection 12.1 of PTM No. 611. The result of one sample of concrete obtained and tested according to AASHTO T 152 for stone and gravel, or AASHTO T 196 for slag coarse aggregate, will constitute the percentage of air content. The Representative will accept concrete based on the adequacy and uniformity of compressive strength at the age of 28 days, and, with respect to the air content, when the PWL is 55% or greater. Calculate the value of Q by one of the following equations, where X 4 is the average of the sublot test results. QL is the lower quality index and QU is the upper quality index. “s” is the Standard Deviation as specified in Section 106.03(a)3.a.4.

2.a For Class AA 28-day concrete compressive strength,

QL = X�4 − 3,300psi s

2.b For percentage of air content of Class AA concrete,

QL = X�4 − 5.0% s and QU = 8.5% − X�4 s

Determine the percentage of material within specification limits as specified in Section 106.03(a)3.

506.4MEASUREMENT AND PAYMENT—Square Yard

The Department will pay on a lot-by-lot basis at the contract price, adjusted for pavement characteristics relative to depth, compressive strength, and air content. The lot payment will be determined according to the multiple characteristic formula as specified in Section 506.4(a)3.

percentage for depth will be determined using Table A. The characteristic percentage for depth (Pd) will be placed in the multiple characteristic formula as specified in Section 506.4(a)3 to determine the lot payment.

Section 506.3(u)2. The characteristic percentages for compressive strength and air content will be determined by using Table B. The characteristic percentage for compressive strength (Ps) and the characteristic percentage for air content (Pa) will be used in the multiple characteristic formula as specified in Section 506.4(a)3 to determine the lot payment.

formula:

+ += 500 ) Pa Pd 2 Ps 2 (C Lp p where:

Lp = Lot Payment

Cp = Contract price per lot (contract price times lot size)

Ps = Characteristic Percentage of Compressive Strength. (T able B)

Pd = Characteristic Percentage for Depth. (Table A)

Pa = Characteristic Percentage for Air Content. (Table B)

TABLE A Characteristic Percentages for Concrete Pavement Cores (Pd) Relative to Specification Limits

15-inch Design Thickness 14.5-inch Design Thickness Characteristic Characteristic Average Core Percentage Average Core Percentage Thickness, inches Pd Thickness, inches Pd

15.00or greater 100.0 14.50 or greater 100.0

14.9014.99 97.1 14.40 - 14.49 96.9

14.8014.89 94.4 14.30 - 14.39 94.0

14.7014.79 91.4 14.20 - 14.29 90.9

14.6014.69 88.0 14.10 - 14.19 87.3

14.5014.59 86.4 14.00 - 14.09 85.5

Less than 14.50 * Less than 14.00 *

14-inch Design Thickness 13.5-inch Design Thickness Characteristic Characteristic Average Core Percentage Average Core Percentage Thickness, inches Pd Thickness, inches Pd

14.00or greater 100.0 13.50 or greater 100.0

13.9013.99 96.7 13.40 - 13.49 96.5

13.8013.89 93.6 13.30 - 13.39 93.2

13.7013.79 90.3 13.20 - 13.29 89.8

13.6013.69 86.5 13.10 - 13.19 85.8

13.5013.59 84.6 13.00 - 13.09 83.7

Less than 13.50 * Less than 13.00 *

13-inch Design Thickness 12.5-inch Design Thickness Characteristic Characteristic Average Core Percentage Average Core Percentage Thickness, inches Pd Thickness, inches Pd

13.00or greater 100.0 12.50 or greater

12.9012.99 96.3 12.40 - 12.49 100.0

12.8012.89 92.8 12.30 - 12.39 96.1

12.7012.79 89.2 12.20 - 12.29 92.4

12.6012.69 85.0 12.10 - 12.19 88.7

12.5012.59 82.8 12.00 - 12.09 84.8

Less than 12.50 * Less than 12.00 81.9

12-inch Design Thickness 11.5-inch Design Thickness Characteristic Characteristic Average Core Percentage Average Core Percentage Thickness, inches Pd Thickness, inches Pd

12.00or greater 100.0 11.50 or greater 100.0

11.9011.99 95.9 11.40 - 11.49 95.7

11.8011.89 92.0 11.30 - 11.39 91.6

11.7011.79 88.1 11.20 - 11.29 87.6

11.6011.69 84.5 11.10 - 11.19 83.8

11.5011.59 81.0 11.00 - 11.09 80.1

Less than 11.50 * Less than 11.00 *

11-inch Design Thickness 10.5-inch Design Thickness Characteristic Characteristic Average Core Percentage Average Core Percentage Thickness, inches Pd Thickness, inches Pd

11.00or greater 100.0 10.50 or greater 100.0

10.9010.99 95.5 10.40 - 10.49 95.3

10.8010.89 91.2 10.30 - 10.39 90.8

10.7010.79 87.0 10.20 - 10.29 86.5

10..60 - 10.69 83.0 10.10 - 10.19 82.3

10.5010.59 79.2 10.00 - 10.09 78.3

Less than 10.50 * Less than 10.00 *

10-inch Design Thickness 9.5-inch Design Thickness Characteristic Characteristic Average Core Percentage Average Core Percentage Thickness, inches Pd Thickness, inches Pd

10.00or greater 100.0 9.50 or greater 100.0

9.90 - 9.99 95.1 9.40 - 9.49 94.6 9.80 - 9.89 90.4 9.30 - 9.39 89.9 9.70 - 9.79 85.9 9.20 - 9.29 85.2 9.60 - 9.69 81.5 9.10 - 9.19 80.6 9.50 - 9.59 77.4 9.00 - 9.09 76.3 Less than 9.50 * Less than 9.00 *

9-inch Design Thickness 8.5-inch Design Thickness Characteristic Characteristic Average Core Percentage Average Core Percentage Thickness, inches Pd Thickness, inches Pd 9.00 or greater 100.0 8.50 or greater 100.0 8.90 - 8.99 94.0 8.40 - 8.49 94.0 8.80 - 8.89 89.3 8.30 - 8.39 88.7 8.70 - 8.79 84.4 8.20 - 8.29 83.5 8.60 - 8.69 79.6 8.10 - 8.19 78.5 8.50 - 8.59 75.1 8.00 - 8.09 73.8 Less than 8.50 * Less than 8.00 *

8-inch Design Thickness 7.5-inch Design Thickness Characteristic Characteristic Average Core Percentage Average Core Percentage Thickness, inches Pd Thickness, inches Pd 8.00 or greater 100.0 7.50 or greater 100.0 7.90 - 7.99 93.9 7.40 - 7.49 93.8 7.80 - 7.89 88.1 7.30 - 7.39 87.8 7.70 - 7.79 82.6 7.20 - 7.29 81.7 7.60 - 7.69 77.3 7.10 - 7.19 76.2 7.50 - 7.59 72.4 7.00 - 7.09 71.1 Less than 7.50 * Less than 7.00 *

7-inch Design Thickness 6.5-inch Design Thickness Characteristic Characteristic Average Core Percentage Average Core Percentage Thickness, inches Pd Thickness, inches Pd 7.00 or greater 100.0 6.50 or greater 100.0 6.90 - 6.99 93.7 6.40 – 6.49 93.6 6.80 - 6.89 87.4 6.30 – 6.39 87.1 6.70 - 6.79 80.8 6.20 – 6.29 79.8 6.60 - 6.69 75.1 6.10 – 6.19 73.9 6.50 - 6.59 69.7 6.00 – 6.09 68.3 Less than 6.50 * Less than 6.00 *

6-inch Design Thickness Characteristic Average Core Percentage Thickness, inches Pd 6.00 or greater 100.0 5.90 - 5.99 93.4 5.80 - 5.89 86.8 5.70 - 5.79 78.7 5.60 - 5.69 72.6 5.50 - 5.59 66.8 Less than 5.50 *

* Defective work, as specified in Section 506.3(t).

TABLE B Characteristic Percentages for Concrete Pavement Compressive Strength (Ps) or Air Content (Pa) Relative to Specification Limits

Percent Within Specification Limits Characteristic Percentage 90 - 100 100 85 - 89 99 75 - 84 94 65 - 74 83 55 – 64 66 Below 55 *

* Defective work, as specified in Section 506.3(t).

The price includes measuring apparatus, which remains the Contractor's property upon completion of the project.