Wisconsin DOT Experience Steven W. Krebs, P.E. As-Designed - - PowerPoint PPT Presentation

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Wisconsin DOT Experience Steven W. Krebs, P.E. As-Designed - - PowerPoint PPT Presentation

Jul 27, 2023 198 likes •524 views

Wisconsin DOT Experience Steven W. Krebs, P.E. As-Designed Performance Models As-Constructed Designed Pavement Age Constructed M&R Plan As-Designed Pay Factors= f( LCC) As-Constructed Rational Contractor Pay Adjustments 2

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Wisconsin DOT Experience Steven W. Krebs, P.E.

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Constructed Designed Pavement Age As-Constructed As-Designed Performance Models As-Constructed As-Designed Rational Contractor Pay Adjustments Pay Factors= f(LCC) M&R Plan

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Initial Smoothness Slab Thickness PCC Strength Air Content

Compute PF Apply M&R and Compute LCC

Rehab Maintenance User Cost (optional)

Predict Future Performance

IRI Transverse Cracking Faulting Spalling

Define acceptable levels Define Sampling Plan

Lot Sublot Partial lot Sampling Frequency Testing Methods

Define Project Conditions

Traffic Subgrade Climate

  • Pav. Structure
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 AQC Target – Acceptance Quality Characteristic

Target: target average and standard deviation levels.

 RQL – Rejectable Quality Levels: AQC levels

requiring correction or replacement.

 MQL – Maximum Quality Levels: AQC levels

requiring no additional pay incentive.

 PF – Pay Adjustment Factor: Adjustment to

contract payment based on the ratio of the as- built pavement LCC to the as-designed LCC.

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5 Project ID Description Strength Air Content Thickness Initial Profile 1160-00-73, 1160-03- 61,62,63 IH 39, Stevens Point to Mosinee – CAPE 1161-00-73 IH 39, USH 51 to North County Line (Portage) – PCC 1209-02-73 USH 151, Belmont to Platteville – CAPE 1517-04-81 USH 10, STH 10 to USH 45 - STREU 1420-09- 70/72 USH 151, Madison to Fond du Lac Rd) - STREU

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 IH 39/90/94 Lake Delton-Madison Rd (NCL –

CTH V), Dane County

 Project ID 1011-01-88  6 lane divided with 8-in tied PCC shoulder  4.25 centerline miles  12.5 in PCC/6 in crushed stone base  18 ft joint spacing, 1.5 in dowels  Project constructed in 2006

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 Strength (Lot = 1 day’s paving)

  • Sublot ~ 500 ft in 2 lanes; 1,000 ft in 1 lane
  • 500 cu yd PCC

 Air Content (Lot = 1 day’s paving)

  • Sublot ~ 500 ft in 2 lanes; 1,000 ft in 1 lane
  • 500 cu yd PCC

 Thickness (Segment = 250 ft, 1 lane)  Smoothness (Segment = 0.1 mi, 1 lane)

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Thickness (Segment = 250 ft, one lane) Strength (Lot = 1 day’s paving) (Sublot ~ 500 ft in 2 lanes) (Sublot ~ 1,000 ft in 1 lane) Air content (Lot = 1 day’s paving) (Sublot ~ 500 ft in 2 lanes) (Sublot ~ 1,000 ft in 1 lane) Smoothness (Segment = 0.1 mi, one lane) ~ 500 ft Example: paving 2 lanes

Standard WisDOT PCC Sampling Plan

500 cu yd PCC

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 1-lane sublot – 0.2 mi (1,056 ft)  2-lane sublot – 0.1 mi (528 ft)  Total = 0.2 lane-mi  Approx. 490 cu yd of concrete (for 12.5 in slab)  AQC’s measured within each sublot boundary

Current Specifications: 500 cu yd strength sublot

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 28-day compressive strength – cylinders  AASHTO T 141*, T 23*, T 22  Average of 2 cylinders per sublot = 1 strength

measurement per sublot (n = 1) ⇒ No changes from current specifications

* As modified by Department in Construction & Materials Manual

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 Air pressure meters  AASHTO T 152*  1 air content measurement per sublot (n = 1)

⇒ No changes from current specifications

* As modified by Department in Construction & Materials Manual

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 Probes  AASHTO T 148, T 24, C & M manual 13.20.9  8 thickness measurements per sublot (n = 8)  4 random longitudinal locations every 0.05

lane-mi (264 ft)

  • 2 readings per location

⇒ Minor change from current specifications

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 California Profilograph – zero blanking band  4 PI measurements per sublot (n = 4)  2-lane sublot (0.1 mi) – inner and outer wheel

path for each lane

 1-lane sublot (0.2 mi) – inner and outer wheel

path for each lane per 0.1 mi ⇒ No change from current specifications

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Thickness (2 per lane per 0.05 mi) Strength (Average of 2 cylinders) Air content (1 per sublot) Smoothness (2 wheelpaths per lane)

0.1 mi (528 ft)

PRS Sampling Plan (2 lanes)

0.05 mi (264 ft) 0.05 mi (264 ft)

Sublot = 0.1 mi, Lot = 1 day’s paving, minimum 4 sublots

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Project ID Number of Lots Number of Sublots Paver Average Strength Strength Standard Deviation 1420-09-70/72 9 56 PCC CONSTRUCTION 4,976 280 1161-00-73,74,75,76, 1166-01-74 7 40 PCC CONSTRUCTION 3,923 210 1517-04-81 9 60 STREU CONSTRUCTION 4,893 261 1209-02-73 18 141 CAPE 4,928 452 1160-00-73, 1160-03- 61,62,63 7 85 JAMES CAPE AND SONS 5,308 505 Total 50 382 Mean: 4,806 402 Median: 4,928 Weighted SD

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 Target Mean ⇒ 4,500 psi  Target SD ⇒ 500 psi  RQL ⇒ 3,250 psi  MQL ⇒ 5,500 psi

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Project ID Number of Lots Number of Sublots Paver Average Air Content Air Content Standard Deviation 1420-09-70/72 10 63 PCC CONSTRUCTION 6.66 0.33 1161-00-73,74,75,76, 1166-01-74 8 43 PCC CONSTRUCTION 6.67 0.51 1517-04-81 16 112 STREU CONSTRUCTION 6.90 0.50 1209-02-73 19 149 CAPE 6.53 0.74 1160-00-73, 1160-03- 61,62,63 7 83 JAMES CAPE AND SONS 6.54 0.64 Total 60 450 Mean: 6.66 0.60 Median: 6.66 Weighted SD

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 Target Mean ⇒ 7.0%  Target SD ⇒ 0.6%  RQL ⇒ 5.5%  MQL ⇒ 8.5%

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Project ID Number of 500 ft 2 lane segments Paver Average Thickness Target Deviation Thickness SD 1209-02-73 23 CAPE 9.37 9.50

  • 0.13

0.198 1209-02-73 81 CAPE 9.43 9.50

  • 0.07

0.264 1160-00-73, 1160- 03-61,62,63 63 JAMES CAPE AND SONS 10.90 11.00

  • 0.10

0.216 1160-00-73, 1160- 03-61,62,63 20 JAMES CAPE AND SONS 10.84 11.00

  • 0.16

0.191 74 ?? - Highway 12, Saulk City 81 9.14 9.00 0.14 0.217 Highway 10, Amherst ??? 80 9.91 10.00

  • 0.09

0.187 1161-00-73 ?? - I- 39, Portage 101 11.07 11.00 0.07 0.184 6290-07-72 ?? - I- 151, Waupau 95 10.09 10.00 0.09 0.174 2 locations/lane per 250 linear ft Mean:

  • 0.03

0.207 Median:

  • 0.08

Weighted SD

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 Target Mean ⇒ 12.5 in  Target SD ⇒ 0.2 in  RQL ⇒ 11.5 in  MQL ⇒ 13.0 in

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Project ID Number of 528 ft segments Paver Average PI PI SE PI SD 1209-02-73 158 CAPE 21.50 4.17 4.85 1209-02-73 162 CAPE 23.74 4.31 5.03 1160-00-73, 1160- 03-61,62,63 178 JAMES CAPE AND SONS 29.41 10.24 13.27 74 ?? - Highway 12, Saulk City 134 26.52 6.26 6.56 Highway 10, Amherst ??? 136 22.88 4.22 4.60 1161-00-73 ?? - I- 39, Portage 142 26.29 4.53 4.83 6290-07-72 ?? - I- 151, Waupau 194 23.63 5.37 5.94 Mean: 24.85 7.27 Median: 23.74 Weighted SD

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 Target Mean ⇒ 25.0  Target SD ⇒ 7.0  RQL ⇒ 50.0  MQL ⇒ 10.0

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  • 5.0%
  • 4.0%
  • 3.0%
  • 2.0%
  • 1.0%

0.0% 1.0% 2.0% 3,000 3,500 4,000 4,500 5,000 5,500 Current Strength Pay Factors, SD = 550 psi SD = 0 psi SD = 500 psi SD = 1,000 psi

$30/sq. yd.

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  • 2.5%
  • 2.0%
  • 1.5%
  • 1.0%
  • 0.5%

0.0% 0.5% 1.0% 5.5 6.0 6.5 7.0 7.5 8.0 8.5 SD = 0 percent SD = 0.6 percent SD = 1.2 percent

$30/sq. yd.

No current pay factor for air content If air content outside control limits, strength bonus = 0.

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  • 25.0%
  • 20.0%
  • 15.0%
  • 10.0%
  • 5.0%

0.0% 5.0% 10.0% 10 20 30 40 50 60 Current Smoothness Pay Factors SD = 2 in/mi SD = 7 in/mi SD = 12 in/mi

$30/sq. yd.

Terminal IRI = 175 in/mi PI = 67 in/mi

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  • 30.0%
  • 25.0%
  • 20.0%
  • 15.0%
  • 10.0%
  • 5.0%

0.0% 5.0% 11.5 12.0 12.5 13.0 SD = 0 in SD = 0.2 in SD = 0.4 in Current Thickness Pay Factors

$30/sq. yd.

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Maximum Composite PF: 110% ?? Minimum Composite PF: 90 % ??

100 100 100 100 100 ⋅       ⋅       ⋅       ⋅       =

smth thk air str lot

PF PF PF PF PF

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 Pavement Condition

Index

  • Average of 97-98
  • Range of 94-100
  • 100 = a new pavement