Application of a Materials-Related Distress Rating System for Portland Cement

Concrete Airfield Pavements

Presented to the FAA Technology Transfer ConferenceAtlantic City, New Jersey

April 20 to 22, 2010

David Peshkin, P.E.

AcknowledgmentsApplied Pavement Technology, Inc.

Co-Authors

Tom Van DamJim Bruinsma

Background Properly designed and constructed PCC

generate expected M&R deterioration patterns Early, a pavement may lose 1 to 2 PCI

points/year; later, perhaps 2 to 4 Deterioration of PCC pavements with MRD is

extremely variable M&R options for MRD-affected pavements are

different and may not be appropriate for same period

Background (continued)

In 2009, APTech performed a project-level evaluation of a PCC feature with MRD

Evaluation included PCI, MRDR, limited petrographic, and FWD testing

Goal was to develop an M&R plan

PCI Evaluation

PCI performed at project level MRD survey procedure triggered by specific

distresses

PCI Results

Section PCI% Due To

Load Climate Other10 72 4 61 3520 81 7 49 4430 80 6 35 5940 80 59 29 12

Area-weighted PCI = 80 Overall good condition

PCI Distresses Corner Break (L, M) Linear Cracking (L, M) Durability Cracking (L, M, H) Joint Seal Damage (M) Popouts Small Patch (L, M, H) Large Patch (L, M) Map Cracking (M) Pumping Shrinkage Cracking Joint Spall (L, M, H) Corner Spall (L, M, H)

Deterioration (PCI)

PCI

Age

0

25

50

75

100

0 5 10 15 20

Critical PCI of 65 reached in 8 more years

Section 10 MRDR = 88

76

107

75

102

37

96

124

0

50

100

150

200

250

300

350

400

MR

D R

atin

g

08 11 16 21 22 25 30

Sample Unit Number

Section 20 MRDR = 103

10394

104

63 62

117 116

38

99

5469

114

3649

7184

167

65

42 36

373

304

0

50

100

150

200

250

300

350

400

MR

D R

atin

g

02 12 25 35 45 55 65 75 95 104 111 124 130 141 150 157 160 170 180 190 198 208

Sample Unit Number

Section 30 MRDR = 54

119

5440

47 50 47 4533

0

50

100

150

200

250

300

350

400

MR

D R

atin

g

07 13 17 25 27 33 39 45

Sample Unit Number

Primary MRD Indicators

Parallel cracking Perpendicular cracking Honeycombing Popouts Patching Staining

Parallel Cracking (L), Discoloration and Staining

Perpendicular and Parallel Cracking (L), Discoloration and Staining

Perpendicular and Parallel Cracking (M), Discoloration and Staining

Petrographic Examination

• Coarse aggregate is limestone and dolomitic limestone

• Fine aggregate is siliceous material (quartz and feldspar)

• All PCC includes Class C fly ash

• ASR identified in all cores

• Micro-cracking and gel are localized

Petrographic Examination

Lessons Learned

PCI indicates generally good conditions MRDR indicates one section already

requires significant rehabilitation, and two others will require rehabilitation within several years

In this instance, MRDR is better suited to assess FOD risk and plan for future M&R

Thank You!

David PeshkinApplied Pavement Technology, Inc.www.appliedpavement.com217.398.3977

dpeshkin@appliedpavement.com