FHWA Update on MCT & PEM/AASHTO PP 84

Transcription

1 PM(1 FHWA Update on MCT & PEM/AASHTO PP 84 Image Here MICHAEL F. PRAUL, PE SENIOR CONCRETE ENGINEER FHWA, OFFICE OF INFRASTRUCTURE Office of Infrastructure

2 Slide 1 PM(1 Approved 12/17xx Praul, Michael (FHWA), 2/1/2018

3 We Are Horrible With Change Timeframe for widespread use of SCM s 28-day strength testing Slump test

4 Evolution of Concrete Testing Slump Cone Pressure Meter Rapid Chloride Permeability Test ASTM C143 ASTM C FHWA/PCA

5 Performance Engineered Mixture Concept Understand what makes concrete last and what failure mechanisms we see Specify critical properties to address those failure mechanisms and test for them Starting point for a performance-driven QA specification and acceptance program for owner agencies

6 PEM Specification Development The Team Dr. Peter Taylor, Director, CP Tech Center/Iowa State Dr. Jason Weiss, Oregon State University Dr. Tyler Ley, Oklahoma State University Dr. Tom Van Dam, NCE Cecil Jones, Diversified Engineering Tom Cackler, CP Tech Center Mike Praul, FHWA Industry Participants/Reviewers Champion States ACPA National, ACPA Chapter Execs PCA NRMCA

7 PM(2 AASHTO PP 84: A Better Specification Require the things that matter Strength Shrinkage Cold weather resistance Transport properties (Permeability) Aggregate stability Workability*

8 Slide 6 PM(2 Images FHWA Praul, Michael (FHWA), 2/1/2018

9 PM(3 What do we want these tests to do? Measure critical performance criteria Be completed economically and rapidly in the lab or the field Allow innovation while evaluating the performance that matters

10 Slide 7 PM(3 Images FHWA Praul, Michael (FHWA), 2/1/2018

11 AASHTO PP 84 A guide specification with tests completed either during mixture design or at placement or both that focus on concrete performance. Allows DOTs to take what they like from the document and make it their own. DOTs should not give up what they already know is important for them.

12 AASHTO PP 84 A commentary is included that gives the technical background behind the tests and limits Includes both prescriptive and performance approaches A tool to help you improve your concrete The document is not designed to be used without modifying for local practice and experience

13 The document is not designed to be used without modifying for local practice and experience!!!

14 PM(4 Why We re Excited Concrete Evolution PEM/PP 84: It s our Superpave Most significant field-level advancement in decades Answers the question With our loss of staff and resources, how are we going to be able to get the job done in the future? Collaboration with industry (It s more than just the tests!)

15 Slide 11 PM(4 Approved 12/17xx Praul, Michael (FHWA), 2/1/2018

16 PM(5 Jerry Voigt, ACPA It s the agency s responsibility to allow for innovation. It s the contractor s responsibility to deliver.

17 Slide 12 PM(5 Approved 12/17xx Praul, Michael (FHWA), 2/1/2018

18 PM(13 Quality Control PP 84 acknowledges the key role of QC in a performance specification Requires an approved QC Plan Testing targets, frequency, and action limits Equipment and construction inspection Mirror design-build experience Requires QC testing and control charts Unit weight Air content/sam Water content Formation Factor (via Surface Resistivity) Strength

19 Slide 13 PM(13 Approved 12/17xx Praul, Michael (FHWA), 2/1/2018

20 PM(14 Mirror Design-Build (DB) Experience DB shifts control from agency to contractor Risk shifts with control Agency retains responsibility and accountability to the taxpayers Contractor submits proposal including how they will develop and deliver the project Post-award, contractor submits a detailed QC Plan Performance specifications have a similar shift of risk and control QC Plans are analogous

21 Slide 14 PM(14 Approved 12/17xx Praul, Michael (FHWA), 2/1/2018

22 PM(21 Quality Control Evolution Change state mindset that QC is not their business Gordon Smith example Change (some) industry mindset that QC is not their business Provide guidance on developing state specification language QC Testing Guide (very similar to guidance for the acceptance program but slanted to industry) QC tests one-pagers and videos Frequency Control charts and usage QC Plan template and guidance

23 Slide 15 PM(21 Approved 12/17xx Praul, Michael (FHWA), 2/1/2018

24 PM(19 Dual Axis Plot Example Air content plotted on the left vertical axis Unit weight plotted on the right vertical axis Air Content,% 9% 8% 7% Air content and Unit Weight 6% 5% 4% 3% Air Content Unit Weight Test # Unit Weight, pcf

25 Slide 16 PM(19 Approved 12/17xx Praul, Michael (FHWA), 2/1/2018

26 PM(20 Unit Weight/Heat Signature/Permeability Surface Resistivity, KOhm-cm Low Moderate High 28 Days Unit Weight Real Time Surface Resistivity 28 Days Surface Resistivity, KOhm-cm Low Moderate High Days Heat Signature Info in a day Real Time Field Data from an MCT project Surface Resistivity 56 Days 28 / 56 days

27 Slide 17 PM(20 Approved 12/17xx Praul, Michael (FHWA), 2/1/2018

28 PM(22 But Mike, You re Asking for a Lot of Change Change has already happened! Cements Widespread use of SCM s Advancements in chemical admixture technology De-icers Agency personnel and experience levels Industry knowledge base

29 Slide 18 PM(22 Approved 12/17xx Praul, Michael (FHWA), 2/1/2018

30 MAP Brief Topics April and June 2017 Why Performance Engineered Mixes Where will PEM be beneficial Overview of PEM Requirements Aggregate Stability Fluid Transport Properties Cold Weather Shrinkage Concrete Strength Workability State agency Quality Assurance with PEM Quality Control

31 PM(24

32 Slide 20 PM(24 FHWA has rights to these images as the documents were developed under FHWA cooperative agreement. Additionally, I wrote a significant part of the 2nd one. Praul, Michael (FHWA), 2/1/2018

33 PM(29 FHWA Mobile Concrete Trailer (MCT)

34 Slide 21 PM(29 Image FHWA Praul, Michael (FHWA), 2/1/2018

35 PM(45 MCT Staff Mike Praul Nicolai Morari Jagan Gudimettla Jim Grove Jerry Clemons

36 Slide 22 PM(45 We have approval from all to use their pic Praul, Michael (FHWA), 2/12/2018

37 PM(41 MCT Program Goals Implement new and proven concrete technologies Evaluate new tests and equipment Demonstrate the benefits of statistical materials acceptance in both agency acceptance programs and industry quality control applications Assist states with concrete issues Specification review and development Technical assistance Forensics Source: Pixabay

38 Slide 23 PM(41 Image Pixabay Praul, Michael (FHWA), 2/6/2018

39 MCT Activities Field visits to active construction projects Quality in the Concrete Paving Process Workshop Focus on PEM implementation Equipment Loan Program, One-on-one Training Conferences, papers, and other activities

40 MCT Conventional Tests Temperature Slump Air Content (Type B) Strength Compressive Flexural Split Tensile Elastic Modulus and Poisson s ratio

41 MCT Non-destructive and In-situ Tests Box Test Match Curing Maturity Pull Out Strength Pavement Thickness Dowel Bar Alignment Tensile Bond Strength Ultrasonic Tomography Capillary Pressure Sensing Handheld Ground Penetrating Radar

42 MCT Durability Tests Super Air Meter (SAM) Surface Resistivity Rapid Chloride Permeability Calorimetry Microwave Water Content Coefficient of Thermal Expansion HIPERPAV software Aggregate gradation software

43 PM(36 MCT Field Visits Active field project for a two-week period Traditional and innovative testing Week 1: Fresh properties 28 Source: FHWA Kick-Off Meeting Testing Testing Week 1

44 Slide 28 PM(36 Images FHWA Praul, Michael (FHWA), 2/6/2018

45 PM(35 MCT Field Visits 29 Week 2: Hardened properties Open House Data in control chart format Source: FHWA Testing Testing Open House Week 2

46 Slide 29 PM(35 Images FHWA Praul, Michael (FHWA), 2/6/2018

47 PM(34 MCT Field Visits Close out meeting with the state DOT, FHWA Division Office, and contractor Summary report/action plan A free QA workshop using the field visit data Close Out QA Workshop

48 Slide 30 PM(34 Images FHWA Praul, Michael (FHWA), 2/6/2018

49 Quality in the Concrete Paving Process Workshop Two-day workshop on concrete materials and construction Benefits of a concrete Quality Assurance Program Contactor benefits of improved Quality Control New technologies and tools for testing and inspection Agency and Contractor Participation (50/50) Class size 30 to encourage discussion DOT (Materials, Construction Staff etc.) Contractor staff (Superintendents, QC Managers etc.) FHWA Division Office staff

50 PM(37 PEM/PP 84 Implementation Assisting PEM Team and TFHRC with ongoing PEM-related research Continuing to assist with Super Air Meter Parallel PEM and state testing during field visits Demonstrating PEM equipment and testing Conferences and other venues Investment through Equipment Loan Program

51 Slide 32 PM(37 Image FHWA Praul, Michael (FHWA), 2/6/2018

52 PM(38 Equipment Loan Program States or industry can borrow MCT equipment MCT staff will provide training, if desired PEM/PP 84 focus Anticipate new equipment purchase for Spring 2018 Currently enhancing information on our website

53 Slide 33 PM(38 Images FHWA Praul, Michael (FHWA), 2/6/2018

54 PM(39 Training One-on-one training to DOT engineers and technicians Side by side comparison of new technologies

55 Slide 34 PM(39 Images FHWA. Model releases obtained from those in middle pic. Praul, Michael (FHWA), 2/6/2018

56 PM(40 One Pagers New effort to use MCT data Narrowly focused Meant to stir interest and point reader to resources 1st : Cement Content 2nd: Optimized Mix Design 3rd : Cores vs. Cylinders 4th : NDT Pavement Thickness 5th: Tining

57 Slide 35 PM(40 Images FHWA Praul, Michael (FHWA), 2/6/2018

58 PM(42 Planned 2018 State Site Visits 36 Minnesota Iowa Colorado (PRS shadow) Texas (PRS shadow) Idaho Florida

59 Slide 36 PM(42 Image FHWA Praul, Michael (FHWA), 2/6/2018

60 2018 Conferences (so far) 37 Maryland Concrete Conference NY Construction Materials Association Technical Conference Texas Concrete Conference ASCE Indiana State Section Annual Meeting Roadway Management Conference (PA)

61 Other FHWA Planned Efforts to Advance PEM 38 Sample state specification language for using QC info (with/without using in acceptance decision) Quality Control Plan template Control chart templates and guidance Guidance on test frequency Guidance on analysis and use of QC data

62 PM(25 Moving Forward--A Transportation Pooled Fund Project PERFORMANCE ENGINEERED CONCRETE PAVING MIXTURES (PEM)

63 Slide 39 PM(25 Image Pixabay Praul, Michael (FHWA), 2/1/2018

64 PM(26 Project Emphasis Implementation of PP 84 Education and Training Adjustments to PP 84 based on field performance Continued development of a knowledge base relating early age properties to performance

65 Slide 40 PM(26 Image Pixabay Praul, Michael (FHWA), 2/1/2018

66 PM(27 PEM/TPF Partners Federal Highway Administration (FHWA) State Departments of Transportation (DOTs) Industry (ACPA-PCA-NRMCA-SCA- Others)

67 Slide 41 PM(27 IMage Pixabay Praul, Michael (FHWA), 2/1/2018

68 PM(28 Pooled Fund Participants 15 States + FHWA & Industry (December 2017)

69 Slide 42 PM(28 Image provided by CP Tech Center under FHWA contract. Praul, Michael (FHWA), 2/1/2018

70 PP 84 Implementation Incentive Funds Available to pooled fund participating states $40,000 for two or more new tests in the mix design/approval process (shadow testing acceptable) $20,000 for one or more new tests in the acceptance process (shadow testing acceptable) $20,000 for requiring an enhanced QC Plan from the contractor $20,000 for requiring the use of control charts Report required within 4 months of construction

71 PEM Incentive Implementation Funds 44 Four states: Categories A, B, C, and D One state: A, B, D Two states: A, B Four states: Currently working on application Two states: No submittal (no concrete paving) Kudos to Maria Masten and Minnesota!

72 PM(33

73 Slide 45 PM(33 My wife and I Praul, Michael (FHWA), 2/1/2018

74 PM(32 Questions? Contact info

75 Slide 46 PM(32 Approved 12/17xx Praul, Michael (FHWA), 2/1/2018