This document discusses concrete overlays as a proven resurfacing strategy. It provides an overview of different types of concrete overlays, including bonded and unbonded overlays of concrete and asphalt pavements. Data is presented on the performance and longevity of concrete overlays constructed in Iowa over several decades, with many showing excellent performance up to 40 years. Thicker overlays and shorter joint spacings are associated with better performance. Overall, concrete overlays are shown to be a highly effective resurfacing solution with a expected service life of 30-40 years for Iowa's highway network.
Shear, bond bearing,camber & deflection in prestressed concreteMAHFUZUR RAHMAN
This Presentation was presented as a partial fulfillment of Prestressed Concrete Design Lab Course. Behavior & Design of Prestress on above topic is shortly discussed on the presentation. The part "Shear & Shear Design in Prestressed" Concrete was prepared by me. Other topics were prepared by other members of my group. Thanks to all my teachers & friends who helped us in different stages during preparation of the total presentation.
Construction Challenges For Bridges In Hilly AreasShantanu Patil
Hilly region pose unique problem for bridge construction. In a restricted hilly area itself climatic condition, Geographical features and hydrological parameters affect considerably. Keeping in view the bridge site and various constraints, type of bridges and method of construction are to be selected carefully for safe, economical and successful completion of bridges construction.
Shear, bond bearing,camber & deflection in prestressed concreteMAHFUZUR RAHMAN
This Presentation was presented as a partial fulfillment of Prestressed Concrete Design Lab Course. Behavior & Design of Prestress on above topic is shortly discussed on the presentation. The part "Shear & Shear Design in Prestressed" Concrete was prepared by me. Other topics were prepared by other members of my group. Thanks to all my teachers & friends who helped us in different stages during preparation of the total presentation.
Construction Challenges For Bridges In Hilly AreasShantanu Patil
Hilly region pose unique problem for bridge construction. In a restricted hilly area itself climatic condition, Geographical features and hydrological parameters affect considerably. Keeping in view the bridge site and various constraints, type of bridges and method of construction are to be selected carefully for safe, economical and successful completion of bridges construction.
A critical review of commonly used bituminous paving mixes has attempted based on
Mix selection based on function and location within flexible pavement.
Capabilities of present day hot mix asphalt plants
in this presentation, we should discuss what is the need for a survey in bridge construction site and what are the needed equipment use in construction. in this presentation, you should learn about how to locate activity of bridge construction.the different method should be learning in this presentation and it more effectively. it is more helpful in your career growth.
thank you
ASWINI & SAGAR
I'm Irfan Nasir. Currently studying Civil Engineering at Mehran University of Engineering and Technology. This is a slide made by me on Defects in rails from the subject Transportation Engineering.
Objective and classification of highway maintenance works. Distresses and maintenance measures in flexible and rigid pavements. Concept of pavement evaluation: Functional and Structural
Swedish Concrete Award 2017: Long and winding road to today's highly reliable...Svenska Betongföreningen
Swedish Concrete Award 2017: Long and winding road to today's highly reliable concrete pavements - Professor Mike Darter, USA. Presenterat på Betongdagen den 17 oktober 2017 på Quality Hotel Globe i Stockholm.
A critical review of commonly used bituminous paving mixes has attempted based on
Mix selection based on function and location within flexible pavement.
Capabilities of present day hot mix asphalt plants
in this presentation, we should discuss what is the need for a survey in bridge construction site and what are the needed equipment use in construction. in this presentation, you should learn about how to locate activity of bridge construction.the different method should be learning in this presentation and it more effectively. it is more helpful in your career growth.
thank you
ASWINI & SAGAR
I'm Irfan Nasir. Currently studying Civil Engineering at Mehran University of Engineering and Technology. This is a slide made by me on Defects in rails from the subject Transportation Engineering.
Objective and classification of highway maintenance works. Distresses and maintenance measures in flexible and rigid pavements. Concept of pavement evaluation: Functional and Structural
Swedish Concrete Award 2017: Long and winding road to today's highly reliable...Svenska Betongföreningen
Swedish Concrete Award 2017: Long and winding road to today's highly reliable concrete pavements - Professor Mike Darter, USA. Presenterat på Betongdagen den 17 oktober 2017 på Quality Hotel Globe i Stockholm.
Off side fabrication and modular construction is not new but, the way it is been done nowadays has a quantitative and qualitative impact. Reducing time and cost has been more achievable because of it.
We have formed a new P(N) process and Theoretical Production to account for the cost of the Glass Mix. In doing so we see that there is a split in the process between the inhouse and remote requirement, and we need to devise Order Fulfillment in such a way that we can account for the completion of the Order. This we accomplish in V2 and V3.
Permeable Pavers: Missed Opportunities and Simplified Cross SectionsElizabeth Arceneaux
This presentation shows many locations where pavers were used for decorative purposes and could have been used for stormwater management. Simplified cross sections of permeable paver systems that result in good infiltration and meet industry standards are presented.
Foundation Design For the abutment and footing design, soil anal.docxbudbarber38650
Foundation Design
For the abutment and footing design, soil analysis was required to determine allowable design loads. Our geotechnical engineers have provided a thoroughly soil reports and calculations for the abutment and is located in Appendix XX. With our design constraints, our structural engineers have come to concluded that spread footing design is best for our pedestrian bridge.
Design Criteria
Based on the geotechnical reports, our structural engineers have designed our abutment and footing to transfer the loads from the pedestrian bridge to the underlying soil and to prevent the soil from tipping the abutment over. Our structural team have worked closely with our geotechnical team to design an abutment that capable to support a 144 Kips (Dead + Live) loads coming from the bridge, and to not exceed the bearing capacity of 4000 psf. With the vertical depth of the abutment and footing of 26 ft, our teams already take into consideration that our footing need to be 3 ft below the channel to prevent the soil erosion below the footing. Our abutment and footing will be design for overturning moment and shear coming from soil pushing into the abutment wall. All stresses have been accounted for and designed to be able to handle the above mentioned stresses, all calculations are included in Appendix XX. Both abutment and footing are the same on both end span of the bridge.
Our structural engineers will use 4000 psi concrete, and 60000 psi steel for the abutment and footing design. The abutment dimensions will be 15 ft wide by 24 ft height and thickness of 4 ft. The footing will have dimensions of 15 ft wide by 2 ft depth a thickness of 12 ft.
With the dimensions of abutment and footing calculated, the righting moment created by reinforced concrete is much larger than the overturning moment pushing against it and is adequate for the bridge support.
Table of Contents
1. Executive Summary
2. Project Personnel
3. Preliminary Design Analysis
4. Appendices
a. Overall Plans and Exhibits
b. Traffic Study
c. Geotechnical Evaluation
d. Site – Civil & Utilities
e. Structural Calculations
f. Construction
g. Summary of Assumptions
MFilanc_FIL
Note
MFilanc_FIL
Text Box
The table of contents should be broken down more. For example: 1.1. Introduction
1.2. Background of project
1.3. purpose and Objective
Each one should also list which page and the entire report should have pagination.
Executive Summary
Introduction
Donovan & Associates looks forward to providing professional engineering services to
the City of Escondido for the design and construction of the new Escondido Pure Water
Pipeline.
Donovan & Associates prides itself in offering the most cost-effective and sustainable
solutions for
public infrastructure improvements and land development. The new Escondido Pure
Water Pipeline will be located on Washington Avenue and Spruce Street in the City of
Escondido. This
project will include the evaluati.
At the California Asphalt Pavement Association (CalAPA) Spring Asphalt Pavement Conference & Equipment Expo held on March 23-24, 2023 in Ontario, Calif., a presentation titled, "Compaction of Asphalt Pavements" was delivered by John Harvey, PhD, Director – City and County Pavement Improvement Center (CCPIC).
Pavement performance requires a proper compaction of the asphalt mixture. Our partners at CCPIC will provide an overview of the importance of pavement compaction and an overview of the roles of contractors and agency representatives to maximize the performance of the pavement.
At the CalAPA Fall Asphalt Pavement Conference held Oct. 27, 2022 in Sacramento, a presentation on compaction of Asphalt Pavements was delivered by DingXin Cheng PhD, Director California Pavement Preservation Center (CP2). Pavement performance requires a proper compaction of the asphalt mixture. Our partners at CCPIC will provide an overview of the importance of pavement compaction and an overview of the roles of contractors and agency representatives to maximize the performance of the pavement.
Attending a job Interview for B1 and B2 Englsih learnersErika906060
It is a sample of an interview for a business english class for pre-intermediate and intermediate english students with emphasis on the speking ability.
RMD24 | Retail media: hoe zet je dit in als je geen AH of Unilever bent? Heid...BBPMedia1
Grote partijen zijn al een tijdje onderweg met retail media. Ondertussen worden in dit domein ook de kansen zichtbaar voor andere spelers in de markt. Maar met die kansen ontstaan ook vragen: Zelf retail media worden of erop adverteren? In welke fase van de funnel past het en hoe integreer je het in een mediaplan? Wat is nu precies het verschil met marketplaces en Programmatic ads? In dit half uur beslechten we de dilemma's en krijg je antwoorden op wanneer het voor jou tijd is om de volgende stap te zetten.
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Retail media wordt gezien als het nieuwe advertising-medium en ook mediabureaus richten massaal retail media-afdelingen op. Merken die niet in de betreffende winkel liggen staan ook nog niet in de rij om op de retail media netwerken te adverteren. Marvin belicht de uitdagingen die er zijn om echt aansluiting te vinden op die markt van non-endemic advertising.
As a business owner in Delaware, staying on top of your tax obligations is paramount, especially with the annual deadline for Delaware Franchise Tax looming on March 1. One such obligation is the annual Delaware Franchise Tax, which serves as a crucial requirement for maintaining your company’s legal standing within the state. While the prospect of handling tax matters may seem daunting, rest assured that the process can be straightforward with the right guidance. In this comprehensive guide, we’ll walk you through the steps of filing your Delaware Franchise Tax and provide insights to help you navigate the process effectively.
Falcon stands out as a top-tier P2P Invoice Discounting platform in India, bridging esteemed blue-chip companies and eager investors. Our goal is to transform the investment landscape in India by establishing a comprehensive destination for borrowers and investors with diverse profiles and needs, all while minimizing risk. What sets Falcon apart is the elimination of intermediaries such as commercial banks and depository institutions, allowing investors to enjoy higher yields.
What are the main advantages of using HR recruiter services.pdfHumanResourceDimensi1
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3.0 Project 2_ Developing My Brand Identity Kit.pptxtanyjahb
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Enterprise Excellence is Inclusive Excellence.pdfKaiNexus
Enterprise excellence and inclusive excellence are closely linked, and real-world challenges have shown that both are essential to the success of any organization. To achieve enterprise excellence, organizations must focus on improving their operations and processes while creating an inclusive environment that engages everyone. In this interactive session, the facilitator will highlight commonly established business practices and how they limit our ability to engage everyone every day. More importantly, though, participants will likely gain increased awareness of what we can do differently to maximize enterprise excellence through deliberate inclusion.
What is Enterprise Excellence?
Enterprise Excellence is a holistic approach that's aimed at achieving world-class performance across all aspects of the organization.
What might I learn?
A way to engage all in creating Inclusive Excellence. Lessons from the US military and their parallels to the story of Harry Potter. How belt systems and CI teams can destroy inclusive practices. How leadership language invites people to the party. There are three things leaders can do to engage everyone every day: maximizing psychological safety to create environments where folks learn, contribute, and challenge the status quo.
Who might benefit? Anyone and everyone leading folks from the shop floor to top floor.
Dr. William Harvey is a seasoned Operations Leader with extensive experience in chemical processing, manufacturing, and operations management. At Michelman, he currently oversees multiple sites, leading teams in strategic planning and coaching/practicing continuous improvement. William is set to start his eighth year of teaching at the University of Cincinnati where he teaches marketing, finance, and management. William holds various certifications in change management, quality, leadership, operational excellence, team building, and DiSC, among others.
Explore our most comprehensive guide on lookback analysis at SafePaaS, covering access governance and how it can transform modern ERP audits. Browse now!
9. SO, WHAT ARE WE DOING
ABOUT IT?
WE’RE WORKING IN PARTNERSHIP TO
DEVELOP STRATEGIES AND
GUIDELINES FOR PROJECT SPECIFIC,
COST EFFECTIVE CONCRETE
SOLUTIONS.
15. WT BOL UBOL
Secondary 1177.6 88.4 490.5 1756.5
Primary 81.8 52.7 160.7 295.2
1259.4 141.1 651.2 2051.7
miles
Municipal 300,000 SY
(approximate)
Airport 739,840 SY
(24 Runways)
16.
17. CONTENTS
1. Overview of Overlay
Families
2. Overlay Types and Uses
3. Evaluations & Selections
4. Six Overlay Summaries
(11”x17 “sheets)
5. Design Section
6. Miscellaneous Design
Details
7. Overlay Materials Section
8. Work Zones Under Traffic
9. Key Points for Overlay
Construction
10. Accelerated Construction
11. Specification Considerations
12. Repairs of Overlays
18. CONCRETE OVERLAYS
Bonded
Concrete
Overlay of
Concrete
Pavements
Bonded
Concrete
Overlay of
Asphalt
Pavements
Bonded
Concrete
Overlay of
Composite
Pavements
Bonded Overlay System
Unbonded
Concrete
Overlay of
Concrete
Pavements
Unbonded
Concrete
Overlay of
Asphalt
Pavements
Unbonded
Concrete
Overlay of
Composite
Pavements
Unbonded Overlay System
Thinner Thicker
BOND IS INTEGRAL TO DESIGN OLD PAVEMENT IS BASE
19. Not a new design procedure!
Background of recommended
overlay design techniques
Detailed examples of how to
use the existing design
methodology
Learn by example – then apply
for your situation!
http://www.cptechcenter.org
20.
21. Check Out
PavementDesigner
Pavement Design Simplified
for:• Streets and Roads
• JPCP
• RCC
• CRCP
• Overlays
• Parking Facilities
• Intermodal Yards
FREE Pavement
Design Program
26. ACKNOWLEDGEMENTS
Full Report: Performance of Concrete Overlays in
Iowa
Phase I of Iowa Highway Research Board TR-689
Project Team:
CP Tech Center: Jerod Gross, Dale Harrington, Dr.
Peter Taylor
Iowa State University: Yu-An Chen, Dr. Halil
Ceylan, Inya Nnelanya, Dr. Omar Smadi
27. CONCRETE OVERLAYS IN IOWA
Iowa: over 2,000 centerline miles of concrete
overlays have been constructed since the late ‘70s
Over half constructed since 2005
Mostly on county highway system
28. PROJECT BACKGROUND
How well have Iowa’s overlays
performed? (How long do they last?)
Approximately 470/506 overlay
projects are still in service today
Includes 68/96 constructed before
1990
Compare to older sources that
indicate expected service life for a
concrete overlay is only about 20
years Dallas County, IA, Constructed 1977
29. PROJECT BACKGROUND
However, as of 2015, there had been no attempt to
characterize performance of overlays to determine
expected service life & what made projects successful
Dallas County, IA, Constructed 1992
30. PROJECT OBJECTIVES
Define performance of Iowa’s concrete overlays
Create performance curves
Analyze specific design choices and characteristics and
link to performance
Overlay type (thin bonded, unbonded)
Thickness
Joint spacing
Traffic
Incorporate lessons learned to improve overlay design and
performance
31. DATA COMPILATION & COLLECTION
Automated pavement condition
data: Iowa Pavement Management
Program (IPMP)
Opt-in program for local agencies
Data collection began in early
2000s (opt-in)
Since 2013, all streets & roads
are covered every other year
This data then combined with
ICPA overlay project records to
produce the complete data set
32. OVERLAY TYPES
Bonded Concrete Overlay of Concrete (BCOC)
Bonded Concrete Overlay of Asphalt (BCOA)
Defined as thickness ≤ 6 inches
Unbonded Concrete Overlay of Concrete (UBCOC)
Unbonded Concrete Overlay of Asphalt (UBCOA)
Defined as thickness > 6 inches
33. DATA DISTRIBUTION
Typical designs in Iowa
Early on: 6 inches on asphalt
(“whitetopping”) or 6+ inches
unbonded on concrete
Performance data for
projects up to 40 years old
Washington County, IA, Constructed 1977
34. DATA DISTRIBUTION
Typical designs in Iowa
‘00s: more types of
projects, including
thinner overlays
Advent of new design
procedures, shorter slabs,
fiber-reinforcement
About 10 years worth of
data, with some
exceptions
Boone, IA, Constructed 2005
52. RESULTS AND ANALYSIS
Key findings and trends:
Overall performance of Iowa’s concrete overlays has been
excellent
As a whole: about 35 years to PCI = 60
About 40 years to IRI = 170 in/mi
Good performance from each of BCOA, UBCOA & UBCOC
Overlays of asphalt slightly better than UBCOC
BCOC less successful overall, but performed well in context of
design life expectations
53. RESULTS AND ANALYSIS
Key findings and trends:
Thickness
In general: thicker overlays have performed better for all overlay
types (e.g. for BCOA, 6” > 5” > 4”)
Transverse joint spacing
Good early performance from short slab designs (6”) on BCOA/thin
overlays
Older designs with 15-20 foot slabs performed well long-term
12 foot slabs—inconclusive
Traffic—inconclusive
Most of these projects are low-volume, <1,000 vpd
Not enough truck traffic data available from local agencies
54. RESULTS AND ANALYSIS
12 foot transverse joint spacing
Across multiple splits, apparent decline in performance of
overlays with 12 foot joint spacing (even compared to
longer spacings)
UBCOA (organized by joint spacing):
Figures: Chen and Ceylan
55. FIELD REVIEWS
Field reviews were performed to:
supplement data analysis
verify findings
investigate trends, outliers
Pottawattamie County, IA, Constructed 1993
56. FIELD REVIEWS
Observed distresses:
Materials-related
Pottawattamie County, IA, Constructed 1999
57. FIELD REVIEWS
Observed distresses:
Rough ride—construction or curling/warping
Occasional faulting
Buchanan County, IA, Constructed 1996
58. FIELD REVIEWS
Observed distresses:
Load-related, possibly mis-designed
or under-designed
Dallas County, IA, Constructed 2006
59. FIELD REVIEWS
Key takeaways:
Observed performance generally matches data
Poor performing outliers & early failure causes:
Materials-related
Load-related/under-design
Rough ride
In short... mostly the same issues that we run into with
conventional PCC pavements
Be aware of increased potential for curling/warping
Beyond above explanations, no direct observations to indicate that
there’s a specific problem with 12 ft joint spacing design
60. CONCLUSIONS
Overall performance of Iowa’s concrete overlays has
been excellent
Upwards of 30-40+ year performance life
Overlays are very well-suited to county highways
Good success to date on interstate, state highways, and
city streets as well
61. NEXT STEPS
Move from performance history → survivability, performance
models
Continue compiling data, keeping the database updated
Le Mars, IA, Constructed 2017
65. NORTHBOUND US 81 NEAR STRANG AND BELVEDERE, NE
8” UNBONDED PCC OVERLAY (1982 AND 1984)
65
66. US 30 BETWEEN LEXINGTON AND COZAD, NE
5” UNBONDED OVERLAY OVER ASPHALT OVER OLD
PCC (2015)
66
67. A 6-INCH UNBONDED OVERLAY OVER FULL-DEPTH HMA
PLACED IN 2010 IN PIERCE COUNTY ON 556TH
STREET
JUST NORTH OF NORFOLK, NEBRASKA
67
68. CELEBRATING 50 YEARS OF LEADERSHIP AND SERVICECELEBRATING 50 YEARS OF LEADERSHIP AND SERVICE
I-70I-70
Western KansasWestern Kansas
6x6x6 Concrete Overlay6x6x6 Concrete Overlay
THIS ISTHIS IS
RESURFACING!RESURFACING!
But it wasn’t always concrete – in the 20s – we had to “get out of the mud”!
Our first concrete street was built in LeMars in 1904
Allow me to offer some brief insight to Iowa’s paving market as we prepare to look at proven cost effective pavement resurfacing solutions.
And our focus on what need’s to be done has changed, too. No longer building new roads, but taking care of what is out there.
Overlays on concrete, on asphalt, on composites, designed as bonded or unbonded, we’ve proven that we can effectively address all of these needs
The proof of the overlay success in Iowa.
See how the overlay is becoming more important to our future?
There is ongoing work to update and finish this document (explained later in this presentation), but it will be released early in 2012.
From ACPA’s overlay explorer. IA = about 1/3 of all overlay projects nationwide
Note two projects—same county, one failed in ~25 years, another going on 40 yrs old with no plan to replace
Briefly cover different overlay types. Note difference in thickness and joint spacing between different overlay types.
We have some older 3-5” PCC overlays, but newer short slab designs only really started appearing in ‘00s
Almost half of all projects are 6” overlays; thinner (4-5”) now account for close to 1/3 of total overlay mileage
Faulting is indirectly measured via IRI
PCI = 60 is where condition changes from ‘good’ to ‘fair.’ ‘Poor’ condition doesn’t actually begin until PCI = 40Performance plot of PCI vs. age for all concrete overlays. (Includes all types of overlays, all thickness, joint spacing, etc.) Key point of emphasis here is that the majority of concrete overlays are on track to fulfill a very good long-term service life. The trendline reaches a PCI of 60 at 35 years. Variability in the data means that you can’t directly infer a 35 year performance life for all concrete overlays, but projects are clearly performing well—certainly the vast majority are lasting longer than 20 years. (May also note here that PCI = 60 is where condition changes from ‘good’ to ‘fair.’ ‘Poor’ condition doesn’t actually begin until PCI = 40.)
PCI for BCOA projects only. This slide is here primarily to give a “sneak peek” at how many different plots/charts are available in the full report, breaking down the data into smaller groups and offering comparisons. One thing you can note here is that thicker BCOA projects (5-6 in.) have shown better long-term performance than thinner BCOA projects (4 in.). Although the more modern thin overlay designs only have data for about 10 years or so.
This slide makes performance of newer, short slab designs more clear. Also you can see kind of an outlier with 12 ft joint spacing performance. Similar to prior slide, but now BCOA performance is sorted by joint spacing as opposed to thickness.
Another sneak peek slide, this time for thick “unbonded” overlays of asphalt. Shows very good long term performance of 7 and 8 inch overlays.
Somewhat worse observed performance than our bonded and unbonded overlays of asphalt—except for very thick design (interstate)
Performance plot of IRI vs. age for all overlays. (Includes all types of overlays, all thickness, joint spacing, etc.) The reason a line is drawn at IRI = 170 in/mi is because that is FHWA’s standard for when ride quality becomes “not acceptable.” Like previous slide, data demonstrates great long-term performance of overlays in terms of ride quality. Trendline intersection appears to be at approx. 40 years, although same caveat applies.
So among thin overlays, the relatively thicker ones have had the longest performance life
Greater susceptibility for curling and warping on overlays—more surface area relative to volume of slab.
Maybe not just under-designed but also poor choice of slab size. Smaller slabs would have mitigated stresses.
