431 Cores shall not be taken within 2 ft of the edge of PCCP, over dowels, or within 5 ft 370 of a transverse construction joint. Cores shall be taken and measured in accordance with ITM 404. All core holes shall be fille d with PCC or rapid setting patch material within 24 h of drilling. If a core measurement reveals that the pavement is more than 1/2 in. deficient in thickness, additional cores shall be drilled at 20 ft intervals on each side of the original core. These additional cores shall be on a line which passes through the original core and parallel to the centerline of the pavement. The drilling shall continue in both directions at 20 ft intervals until two successive cores indicate a thickness deficiency of 1/2 in. or less, or where cores can no longer be drilled in the new PCCP. 380 If a core indicates a thickness deficiency of more than 1 in. and two cores drilled adjacent at 20 ft intervals i ndicate a thickness deficiency of not more than 1 in., additional cores shall be drilled at 5 ft intervals on each side of the initial core. The drilling shall continue in both directions at 20 ft intervals until two successive cores indicate a thickness deficiency of 1/2 in. or less, or where cores can no longer be drilled in the new PCCP. When a single core indicates a thickness de ficiency of more than 1 in., or if two or more adjacent cores indicate a thicknes s deficiency of more than 1/2 in., the 390 investigation will be expanded to include adjoining PCCP. The additional cores shall be taken from the adjoining traffic lanes or shoulders at the same station at which the first core or cores indicated the deficiency, whether the lane was paved at the same time or not. The width of adjudicated PCCP shall be the width of pavement lane in which the deficiency occurs. Pavement th at has been replaced shall be investigated for thickness.
a.Sections The quantity of PCCP for each pay item will be defined as a section. The section 400 will be divided into subsections of 1,200 sq yds. Sections less than 1,200 sq yds shall not be cored. A minimum of one core shall be drilled at a random location within each subsection. A section greater than or equal to 1,200 sq yds shall have a minimum of four cores drilled. Partial subsections shall not be cored unless otherwise directed. Widening of 3 ft or less shall not be cored unless otherwise directed. Formed drives shall not be cored unless otherwise directed. Verification of the required pavement depth on formed drives shall be checked in the presence of the Engineer prior to pouring, by making stringline measurements every 10 ft across the width of the drive. Any location deficient in thickness by 1/4 in. or more shall be 410 corrected prior to placing PCCP.
b.Average PCCP Thickness The thickness of the PCCP for each section shall be the average lengths of all cores from the section. However, no cores shall be included from areas for which no 502.21 432 payment will be made. Where PCCP has been removed and replaced, the initial core lengths will be discarded and the core lengths of the replaced PCCP will be substituted. Any core measurements exceeding the specifi ed PCCP thickness by more than 1/2 in. will be recorded as the specified PCCP thickness plus 1/2 in. Calculations shall be to the nearest 0.1 in. 420
c.PCCP Adjusted Payment If the average PCCP thickness is equal to or greater than the specified thickness, no adjustments will be made. If an average PCCP thickness is less than the specified thickness by up to 1/2 in., payment for that section will be adjusted in accordance with the following: Q T = Q x U x (1 – M2/S2) where: QT = quality assurance assessment for thickness Q = placed quantity of the PCCP section M = average PCCP thic kness of the section S = specified PCCP thickness of the section U = unit bid price.
d.PCCP Non-Payment Where two adjacent cores indicate a thickne ss deficiency of more than 1/2 in., no payment will be made unless the PCCP is removed and replaced. Payment for PCCP with non-adjacent cores indicating a thickness deficiency of more than 1/2 in. will be in accordance with 502.21(c). The limits of non-payment shall extend from deficient core to the transverse joint location nearest the first additional core indicating a thickness deficiency of less than 1/2 in. 440
e.PCCP Removal Where two adjacent cores indicate a thickne ss deficiency of more than 1 in. the PCCP shall be removed and replaced. No n-adjacent cores indicating a thickness deficiency of more than 1 in. do not require removal and replacement. The limits of removal and replacement sha ll extend from the defi cient core to the transverse joint location nearest the first additional core indicating a thickness deficiency of less than 1/2 in.
502.22 Method of Measurement
PCCP will be measured by the square yard of the thickness specified. The area of PCCP will be the planned width of the pavement multiplied by the length of the pavement, or as directed in writing. The width of the pavement will be as shown on the typical cross-section of the plans. The length of the pavement will be measured parallel to the surface of the pavement along the centerline of the roadway or ramp, excluding paving exceptions as shown on the plans. 502.22 Milled pavement corrugations will be measured in accordance with 606.04.
502.23 Basis of Payment
The accepted quantities of PCCP will be paid for at the contract unit price per square yard for the thickness specified, complete in place. Adjustments to the contract payment with respect to thickness will be included in a quality assurance adjustment pay item in accordance with 109.05.1. Milled pavement corrugations will be paid for in accordance with 606.05. Payment will be made for portland cement content of more than 564 lb/cu yd 470 when ordered in writing. Additional payment for the quantity used will be at the net unit price of portland cement as shown by certified vouchers for the quantity used in accordance with 109.05. Payment for pavement thickness determinations will be made at the contract lump sum price for coring, PCCP in accordance w ith 501.31. A change order in accordance with 109.05 will be developed to adjust the co st of PCCP when the final PCCP quantity differs from the bid quantity by more than 2,400 sq yds. This adjustment covers the cost of cores for the adjusted quantity of PCCP. The adjustment, plus or minus, will be based on the difference in the number of subsections, rounded to the nearest full 480 subsection, times $100. Payment will be made under: Pay Item Pay Unit Symbol PCCP, _________ _ in. .............................................................. SYS thickness No additional payment will be made for PCCP which has an average thickness 490 above that shown on the plans. The cost of trial batch demonstrations shall be included in the cost of PCCP. The cost of corrections for pavement sm oothness and retexturing shall be included in the cost of PCCP. Removal and replacement of PCCP found to be deficient or damaged by freezing shall be completed with no additional payment. 500 The cost of coring and refilling of the pavement holes for appeals shall be included in the cost of PCCP. 502.23
Source: Indiana Standard Specifications, 2024 Edition. Pages 429–432 of 1,248.