background & demonstration · pdf file · 2018-01-25acpa, nrmca, and pca...
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Background & Demonstration
1 hour Webinar with 15-minutes of Q&A
All attendees are muted
Questions? – Use ‘Questions’ Pane
Webinar Recording – NRMCA Channel
Presentation to be posted on website 01.24.2017
Your Presenter…Brian Killingsworth, P.E.
National Ready Mix Concrete Association
• Executive Vice President, Division Head for Local Paving• Focus on Parking Lot and Street Promotion and Technical Assistance• 6½ years with NRMCA• 19 years as Paving Consultant• Pavement Design, Materials, Construction, & Forensics• BSCE, MSCE – Texas A&M University
11/6/2017
MENH
VT
NY
PA
MA
NJ
MD
VA
NC
WV
SCGA
OH
TN
AL
KY
MS
INIL
WI
MO
FL
AR
LA
IA
MN
KS
NE
ND
WYSD
MT
CO
NMAZ
UT
OK
TX
ID
NV
WA
CA
OR
AK
HI
MI
PR
DE
CT RI
Amanda Hult, P.E.Senior Director
Southeast
Ken Justice, P.E.Senior Director
Midwest
Don Clem, P.E.Vice President
Northwest
Jon HansenSenior Vice President
Southwest
Phil KresgeVice President
East Central
Luke McHugh, P.E.Senior Director
Northeast
Brian Killingsworth, P.E.Executive Vice President
Team Lead
www.PaveAhead.com‘Meet The Experts’ Page
Do You need professional development hours (PDHs)?• If you need a pdh certificate, send request to
bkillingsworth@nrmca.org from the email you registered with.
• After confirmation of your registration, a pdf copy of the certificate will be emailed back to you within two weeks.
• For multiple attendees from one site registration, include a list of names and email addresses for all attendees with a statement confirming that all attendees completed the webinar.
Agenda• Need and Relevance• Development and Technical Background• Methodologies and References for Design (and Construction!)• Design Demonstrations
• Parking Lots• Streets and Roads• Intermodal
• Questions and Answers• Q&A handled through ‘Questions’ Pane.
PavementDesigner.org Partners
• American Concrete Pavement Association
• National Ready Mix Concrete Association &
RMC Research & Education Foundation
• Portland Cement Association
• RCC Pavement Council
Need and Relevance – Addressing Demand
• AASHTOWare Pavement ME – DOT Paving Projects
• Non-DOT agencies and consultants seeking design tools that are:• affordable,
• easy-to-understand in terms of input/output,
• applicable to traffic levels that are low to moderate, and
• utilizes widely available, cost effective materials characterization.
• Designers value quick-access design tools, providing robust answers
• Students looking for technology to assist with course work
• Professors often favor simple-to-implement solutions• no complicated or expensive licensing terms or lab setup
Need and Relevance – Provides Alternative to PaveXpress and I-PAVE
Website design tools sponsored by asphalt industry.Debatably conservative designs for rigid pavements.
Need and Relevance – Provides Alternative to PaveXpress and I-PAVE
• I-PAVE underrepresents foundation support• PaveXpress claims to follow AASHTO design methods but results show otherwise…
• Conservative thickness results for PCC lead to first-cost competitive disadvantagesFor details, see: Ferrebee, E. (Oct. 2015). I-PAVE and PaveXpress: Equitable Pavement Design? http://www.acpa.org/position-papers/
PCC Materials Run
Modulus of Rupture (psi)
Elastic Modulus (psi)
1 (Baseline) 690 4,000,0002 600 4,000,0003 662 4,000,0004 750 4,000,0005 600 2,564,5006 662 4,000,0007 690 4,634,5008 750 6,014,5009 690 2,564,500
10 690 6,014,500
Need and Relevance – Unify Industry Design Tools• Many existing design programs:
• ACPA StreetPave 12: Structural Design Software for Street and Road Concrete Pavement
• ACPA AirPave 11: Structural Design Software for Airport Concrete Pavement
• ACPA WinPAS 12: Structural Design of Concrete Pavement by AASHTO 1993 Method
• ACPA BCOA: Bonded Concrete Overlay on Asphalt Thickness Design Calculator
• Univ. of Pitt BCOA-ME: Bonded Concrete Overlay on Asphalt Thickness Design
• NRMCA Concrete Pavement Analyst (CPA): Concrete Pavement Design for Parking Lots
• PCA RCCPav: Structural Design of Roller-Compacted Concrete for Industrial Pavements
• PCA PCAPav: Structural Design of Concrete Pavement
• Can be challenging for designers to determine best choice and get consistent results and recommendations across software products
• Could contribute to negative perception that cement-based pavement solutions are difficult to design
Overview and Background• ACPA, NRMCA, and PCA partnership, with a contribution from
the RCC Council to develop a website application to design cement-based solutions for:• Streets and Local Roads• Parking Lots• Intermodal/Industrial Facilities
• Design guidance and tools for:• Jointed-Plain Concrete Pavements• Continuously Reinforce Concrete Pavement• Concrete Overlays• Composite Pavements• Roller Compacted Concrete• Cement Modified Soils• Cement-Treated Base• Full-Depth Reclamation
Bringing Online the Best Available Design Tools for Multiple Platforms
Concrete Pavement Design Basics
• Failure modes are cracking and faulting• Roots date back to the 1960s PCA Method• Tailored for parking lots and streets
Cracking: Limit Stress Ratio to Allow Design Reps
• PavementDesigner (SR) = Stress / Concrete Strength
• PavementDesigner makes slab thicker to limit stress ratio low enough to achieve the design traffic repetitions
0.4
0.5
0.6
0.7
0.8
0.9
1
1.E+00 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07 1.E+08 1.E+09 1.E+10
Stre
ss R
atio
Repetitions
Fatigue Data
StreetPave R=95%
Inference space normalized to SR
Faulting: Function of Erosion Potential Below Slab
• If dowels used, faulting mitigated & fails by cracking
• No faulting data collected at the AASHO road test so model developed in 1980s using field performance data from WI, MN, ND, GA, and CA
• Similar to cracking models, the pavement is made thicker, as necessary, until faulting model predicts that the pavement will not fail by faulting during the design life
• Future version of PavementDesigner will include revised erosion & faulting model
Traffic Spectrum + Axle Counts
• Total trucks in design lane over the design life… calculated from trucks/day (2-way), traffic growth rate (%/yr), design life (yrs), directional distribution (%) and design lane distribution (%)
Single Axles
Axle Load (kip) Axles/1,000 Trucks
34 0.19
32 0.54
30 0.63
28 1.78
26 3.52
24 4.16
22 9.69
20 41.82
18 68.27
16 57.07
Tandem Axles
Axle Load (kip) Axles/1,000 Trucks
60 0.57
56 1.07
52 1.79
48 3.03
44 3.52
40 20.31
36 78.19
32 109.54
28 95.79
24 71.16
Rigid Pavement Thickness Design – Technical Guidance & ReferenceConstruction Type Parking Lots Streets Intermodal
New Construction:
Technical Manuals & Reference ACI 330-08
JPCP - ACI 325.12R-02 (2013)RCC - Guide for RCC CP Tech
CRCP - FHWA-HIF-16-026Composite – PCA Pubs
ACI 330.2R-17
Concrete Overlay (Bonded):
Technical Manuals & ReferenceCP Tech Center Guide to
Concrete Overlays of Asphalt Parking Lots
CP Tech Center Guide to Concrete Overlays (3rd Ed.) &
FHWA-ICT-08-016
No Standard Industry Guidance
Use ACI 330.2R-17 for reference
Concrete Overlay (Unbonded):
Technical Manuals & Reference ACI 330-08 (Design as new composite pavement)
CP Tech Center Guide to Concrete Overlays (3rd Ed.)
No Standard Industry Guidance
Use ACI 330.2R-17 for reference
Parking Lots – New Construction
Design Guidance For ConventionalConcrete Parking Lots
ACI 330-08
www.concrete.org
Parking Lots – New Construction
Design Criteria:
Minimize Mid-Slab Cracking
Support Materials From NRMCA• ACI 330-Quick Reference
• FAQ Parking Lots
• Lighting Benefits
• Design Assistance Program
• www.PaveAhead.com
Streets – New Construction (JPCP)
Design Guidance For ConventionalConcrete Streets and Local Roadways
ACI 325.12R-02 [2013]
www.concrete.org
Streets – New Construction (JPCP)
Design Criteria:
Minimize Faulting (Under Slab Erosion) and Mid-Slab Cracking
NRMCA Technical Support for JPCP StreetsTab 0 - Executive Summary & Table of Contents Tab 1 - Introduction to Rigid Pavements Tab 2 - Rigid Pavement Design Tab 3 - Code Language for Rigid Pavement Adoption Tab 4 - Determining the Soil Support Value for Design Tab 5 - Traffic Classification Tab 6 - Design Optimization Tab 7 - Materials and Construction Specifications Tab 8 - ConstructionTab 9 – Concrete Mixtures Tab 10 - Construction and Inspection Tab 11 - Maintenance and Rehabilitation Tab 12 - Sustainability Tab 13 - Certifications for Production and Construction Tab 14 - Example Pavement Design Report
https://paveahead.com/resources/
Streets – New Construction (CRCP)
Continuously Reinforced ConcretePavement Manual*
FHWA HIF-16-026
*In cooperation with the Concrete Reinforcing Steel Institute (CRSI)
Also see CRCPavement.org
CRCP Design with Pavement Designer
• PavementDesigner recommends using AASHTOWare’s Pavement ME
• Use PavementDesigner to get an estimated design with AASHTO 93
Streets – New Construction (CRCP)
AASHTO 93: Selection of steel reinforcement by crack spacing, maximum crack width, and maximum steel stress.
Streets – New Construction (RCC)
Guide for Roller-Compacted Concrete Pavements
National Concrete Pavement Technology Centerwww.cptechcenter.org
Streets – New Construction (RCC)
Design Criteria:
Minimize Faulting (Under Slab Erosion) and Mid-Slab Cracking
Streets – New Construction (Composite)
Guide to Full-Depth Reclamation With Cement
National Concrete Pavement Technology Centerwww.cptechcenter.org
Other References:PCA Publications on
Cement Modified Soils &Cement Treated Bases
Streets – New Construction (Composite)*
JPCP Design Criteria:
Minimize Faulting (Under Slab Erosion) and Mid-Slab Cracking
*Also Options for Design of HMA or Chip Seals On Cement Treated Materials
Parking Lots – Bonded Concrete Overlay On Asphalt
www.cptechcenter.org
Guide to Concrete Overlays of Asphalt Parking Lots
National Concrete Pavement Technology Center
Parking Lots – Bonded Concrete Overlay On Asphalt
Design Criteria:
Minimize Mid-Slab Cracking
Streets – Bonded and Unbonded Concrete Overlays(On Concrete or Asphalt)
www.cptechcenter.org
Guide to Concrete Overlays, Third Edition
National Concrete Pavement Technology Center
Streets – Bonded Overlays on Asphalt
Design and Concrete Material Requirements for Ultra-Thin White Topping (Bonded
Concrete Overlays)
Illinois Center for Transportation
http://ict.illinois.edu/research/publications/
Streets – Bonded Overlays on Asphalt
BCOA-ME Theory Manual: Bonded Concrete Overlays of Asphalt Pavements Mechanistic-
Empirical Design Guide
University of Pittsburgh
http://www.engineering.pitt.edu/Sub-Sites/Faculty-Subsites/J_Vandenbossche/BCOA-ME/BCOA-ME/
Streets – Bonded Concrete Overlay On Asphalt
Design Criteria:
Minimize Mid-Slab Cracks
Intermodal – New Construction (JPCP)
Guide for the Design and Constrction of Concrete Site Paving for Industrial and
Trucking Facilities
ACI 330.2R-17
www.concrete.org
Intermodal – New Construction (JPCP)
Design Criteria:
Minimize Cracking by
Focusing Stress Ratio
(Calc Flex Stress/Flex Strength)
What About Pervious Concrete Pavement?
Pervious Concrete 6” – 10”
Open-Graded Base 6” – 24”+
Filter Fabric (optional)
Subgrade
Water Table
Pervious Concrete: Designing Cross-Sectional ThicknessTwo-Step Design Procedure:
• Structural Design: For Traffic Loading Conditions (PavementDesigner.org or PerviousPave)• Hydrologic Design: For Environmental Conditions
• Select the greater required thickness
Source: Charger Enterprises, Inc.
www.acpa.org/perviouspave/
Pervious Concrete References - ACI 522R-10 • Provides technical information on pervious concrete’s:
• application,• properties, and• construction methods.
www.concrete.org
Summary –• Primary audience is city, county, and consultant
engineers who design pavements
• Secondary audience is professors and students
• Unifies design methods, providing promoters with a single source to direct target audience to for consistent answers
• Fills a design void for some products
• Web-based platform, appealing to existing and future generations of design engineers…
• …with broad industry partner support!
• FREE and easily accessible!
Do You need professional development hours (PDHs)?• If you need a pdh certificate, send request to
bkillingsworth@nrmca.org from the email you registered with.
• After confirmation of your registration, a pdf copy of the certificate will be emailed back to you within two weeks.
• For multiple attendees from one site registration, include a list of names and email addresses for all attendees with a statement confirming that all attendees completed the webinar.
Demo Time!
Try it out at: www.pavementdesigner.org
• Questions? – Use ‘Questions’ Pane
• Webinar Recording – NRMCA Channel
• Presentation to be posted on website
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