RCP Evaluation Matrix 2 Goal PII National Overview

RCP Evaluation Matrix

2 Goal • PII National Overview & Lessons Learned • Provide Knowledge and Tools to obtain Correct Evaluation of Installed RCP www. concrete-pipe. org

3 WA VT MT ME ND MN NH OR NY WI ID MI SD WY RI CT PA IA NE OH IN NJ IL CA UT NV WV CO KS MO VA KY NC TN OK AZ AR NM AK SC MS AL TX GA LA FL DE MD MA

4 www. concrete-pipe. org

5 If you Put Horse (Specs. ) before Cart (Training and Preparation) • Results will be: § § § Fire Drills Wasted Effort Needless Cost Increases Frustration by ALL Realize not properly prepared to handle all decisions www. concrete-pipe. org

ALL STAKEHOLDERS MUST BE PREPARED! 6 • PREPARED? § Research & Understand Tools and Capabilities § Understand Piping Products (Accurate Expectations) § Identify & Train Evaluation Team § Write Clear Specs & Specific Report Requirements • Evaluation Criteria § Prepare and inform all STAKEHOLDERS • IMPLEMENT Slide 6

7 INSPECTION TEAM • Trained & Competent (NASSCO – PACP) • Proper Tools – Meet Spec. Requirements • Job = CLEAR Images – Report as Required by Specs! • REPORT FORMAT!

8 Tools • Standard Video Equipment § Add-Ons • Laser Profiling equip. & Software • Camera mounted Laser Micrometers • 360 Deg. Digital Scanning Cameras § Add-Ons • Laser Profiling equip. & Software www. concrete-pipe. org

Typical Inspection Set-Up – Flexible Pipeline CCTV Remote Controlled Camera Laser www. concrete-pipe. org 9

10 Typ. Video Insp. Tools RCP www. concrete-pipe. org

11 Evaluation Team • Know & Understand Specs. & AASHTO Guidelines • Be Able to Differentiate Between § Cosmetic = Non-ISSUES § Minor Construction “Bruises” = Note but No Repair § Structural Issue = Evaluate Severity and determine if acceptable or what remedy required www. concrete-pipe. org

13 Scope The document was developed for the sole purpose of providing information to allow the reader to properly evaluate post installation inspection data collected from newly installed Reinforced Concrete Pipe (RCP). www. concrete-pipe. org

Contents • Background on RCP Loads, Design, Structural Confirmation, & Joint Performance www. concrete-pipe. org 14

Contents • Background on RCP Loads, Design, Structural Confirmation, & Joint Performance www. concrete-pipe. org 15

Contents • Background on RCP Loads, Design, Structural Confirmation, & Joint Performance www. concrete-pipe. org 16

Contents • Background on RCP Loads, Design, Structural Confirmation, & Joint Performance • Decision Matrix § Crack Evaluation & Repair § Joint Evaluation & Repair § Spalling and Slabbing Evaluation & Repair www. concrete-pipe. org 17

Contents 18 • Background on RCP Loads, Design, Structural Confirmation, & Joint Performance • Decision Matrix § Crack Evaluation & Repair § Joint Evaluation & Repair § Spalling and Slabbing Evaluation & Repair • References & Supporting Documents www. concrete-pipe. org

19 INTERACTIVE www. concrete-pipe. org

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22 Crack Evaluation Matrix www. concrete-pipe. org

23 Crack Evaluation Matrix • Consistent with AASHTO Guidelines • Acceptance vs. Repair • Must know location, orientation, & crack width www. concrete-pipe. org

Crack measurement Accuracy? Can you expect 24 accurate measurements of cracks less than 0. 05” in width? (Width of U. S. Dime = 0. 05”) Slide 24

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Crack Matrix Allows user to quickly evaluate crack severity and determine if crack is detrimental or acceptable without repair. Follows AASHTO Guidance Be Prepared to see some cracking. Crack < 0. 10” (width of two Dimes) = Generally Acceptable www. concrete-pipe. org 26

AASHTO LRFD Bridge Construction Specification Section 27. 6. 4 (Summary) Crack < to 0. 01” These cracks are minor & OK Crack between 0. 01” and 0. 10” Evaluation required: is it detrimental and in a corrosive environment? (PH<5. 5) If non-corrosive or not detrimental – OK If corrosive and detrimental – Seal crack Crack > 0. 10” Evaluation required: is crack detrimental to structure? If not detrimental – OK If detrimental – repair and seal crack If not repairable – remediate or replace Slide 27 27

28 What do you think about this? Let’s take our CRACK Matrix and evaluate this…given the following facts. www. concrete-pipe. org

29 Let’s Use Actual Data and Crack Matrix…. Practice Makes Perfect…. . § § § Longitudinal crack (C 1) Crack width = 0. 04” (C 4) No Vertical offset (C 7) Soil Maps indicate Ph = 6+/- (C 15 & 16) No spalling at crack (C 18) • Any Action to be taken? www. concrete-pipe. org

30 Action Required… ANSWER! Note in report…No Repair or remediation needed (C 19) Review Normal Crack Formation www. concrete-pipe. org

31 What’s This? www. concrete-pipe. org

32 Practice Makes Perfect…. . • Take out Crack Matrix… § § Transverse - Circumferential crack (C 2) Mid pipe from 3 o-clock to 9 0 -clock Crack width = 0. 15” No sign of soil migration (C 3) • Any Action to be taken? www. concrete-pipe. org

33 Proper Evaluation • No Circumferential Crack is not structural & No soil Migration means no long term effect…(C 21) www. concrete-pipe. org

34 Why are Transverse Cracks Not a Structural Issue? Slide 34

35 One More…. www. concrete-pipe. org

36 Practice Makes Perfect…. . • Take out Crack Matrix… § § Longitudinal crack (C 2) Crack at Invert 6 o-clock and 12 o-clock Crack width = 0. 08” (C 9) Soil Maps indicate Ph = 4+/- (C 16) • Any Action to be taken? www. concrete-pipe. org

37 Answer… § Yes - Seal Crack to protect steel and insure anticipated service life…. (C 17) § See Crack Repair Procedures. . • Cautions about wet v dry cracks • ZOOM issues • ACTUAL Accuracy www. concrete-pipe. org

Joint Evaluation Matrix www. concrete-pipe. org

39 Joint Matrix and Supporting Documents…. • Performance Expectation? § Leak Resistant, Silt Tight, Soil Tight § AASHTO PP-63 Excellent! • Understanding of Severity • Decisions & Repair options discussed… www. concrete-pipe. org

40 Joint Evaluation • Before you begin Evaluation you need: § Know Performance required § Manufacturers Allowable Gap www. concrete-pipe. org

41 Joints PII Report Info Required • Accurate Measurement of Gaps • Note any leaking joints • Note Evidence of soil migration through joint requires evaluation • Differential movement, cracks, spalls, improper gasket placement, movement or settlement to be noted Slide 41

42 Work through few Examples. . www. concrete-pipe. org

43 Work through few Examples. . • Given Problem… § § § Silt-Tight Performance Specified (J 5) Pipe Dia. = 36” No sign of Soil Migration Actual Measured Max Gap = ¾” (J 11) Manuf. recommended joint gap = 1. 25” No Vertical offset (J 13) • What Action should be taken? www. concrete-pipe. org

44 Is Remediation Needed? • No Action Needed (J 17) www. concrete-pipe. org

45 Next Condition to Eval… www. concrete-pipe. org

46 Work through few Examples. . • Given Problem… § § § § Soil-Tight Performance Specified (J 6) Pipe Dia. = 54” No sign of Soil Migration Actual Measured Max Gap = 1. 6” (J 11) Manuf. recommended joint gap = 1. 75” No Vertical offset (J 13) Crack 0. 12” (J 15) • What Action should be taken? www. concrete-pipe. org

47 Is Remediation Needed? • Yes • Repair Joint (J 16) • Tricky Issues in PII Videos/still shots § Camera not centered § Gaps appear larger than actual § Must Measure! www. concrete-pipe. org

Slabbing / Spalling Evaluation Matrix www. concrete-pipe. org

49 Spalling/Slabbing • Spalling § § crack face edges chipping at joint No steel exposed = No Problem Steel exposed needs repair www. concrete-pipe. org

50 Spalling/Slabbing • Spalling § § crack face edges chipping at joint No steel exposed = No Problem Steel exposed needs repair • Slabbing – typically caused by Radial Tension Shear § Cracks 30 deg off invert § Slabs of concrete can become dislodged § Slabbing is repairable www. concrete-pipe. org

51 Spalling/Slabbing • Spalling § § crack face edges chipping at joint No steel exposed = No Problem Steel exposed needs repair • Slabbing – typically caused by Radial Tension Shear § Cracks 30 deg off invert § Slabs of concrete can become dislodged § Slabbing is repairable www. concrete-pipe. org

Don’t Put the Cart Before the Horse! www. concrete-pipe. org 52

Concluding Encouragement! Prepare Before you Implement! 53 • PREPARE § § Research & Understand Tools and Capabilities Know Piping Products Train Evaluation Team Write Clear Specs & Specific Report Requirements • NASSCO/PACP Certified Inspection Teams • Specific Report Requirements • Evaluation Criteria § Prepare and inform all STAKEHOLDERS • IMPLEMENT Slide 53

54 I Am All Ears…. for your ? ’s