April 2019, Volume 35, Issue 4 Print

President's Memo

This is my last memo as President. It has been a pleasure being the president for the second time. As I look back, I feel accomplished since I met all the goals that I set out to do coming in as president. Our new website has been working out great. The new platform lets us easily manage memberships, send emails, and receive payments for events. The website also makes it easy to fill out our Annual Report to National. In light of this, I’m proud that our chapter received the Excellent Chapter award for 2018. An Excellent Chapter is the highest status a chapter can achieve. The awards are based on membership participation, certification, financials, support to other chapters, and successful events. There are over 100 ACI chapters and only 23 have been awarded this status.

I’m happy to announce our Inaugural Illinois Chapter Excellence in Concrete Construction Awards. Nominating a concrete project was the easy part, but submitting an application took a bit of coordination between the Owner, Architect, Engineer, General Contractor, Concrete Contractor, and Concrete Supplier. There can be winners from six categories, and for our first year, we have two winning projects! 150 North Riverside is our winner in the High Rise Category, and IL 390 / I-290 Interchange is our winner in the Infrastructure Category. Read further to find out more about each project and team members.  All team members have been invited to our Annual Dinner on May 11th, 2019. We hope that you can attend the Annual Dinner to be there to congratulate them.

Joni L. Jones
ACI-IL President

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Calendar of Events

Monthly Dinner Meetings
April 17 at Gibsons Oakbrook

Meeting with Student Chapter (All are Welcome)
Thursday, April 18th
University of Illinois in Urbana

Annual Dinner
May 11, 2019 at the Mid-America Club
200 East Randolph Dr 80th Floor
Chicago, IL 60601

Golf Outing
Thursday, June 13
Tamarack Golf Club
Naperville, IL

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April Dinner Meeting

Please join us for our April Dinner Meeting on April 17th at Gibsons Oak Brook.

Topic: Illinois Tollway Updates

Cindy Williams
Deputy Chief of Program Implementation
Illinois Tollway

Cindy Williams joined the Illinois Tollway in March 2018 as Deputy Chief of Program Implementation. She brings with her 20 years of experience in construction and materials management.

At the Tollway she is responsible for infrastructure asset management and materials engineering relative to design and construction.

She joins the Tollway near the middle of its 15-year, $14 billion Move Illinois capital program and looks forward to the challenges ahead as she seeks to improve internal and external communication, identify vulnerabilities and evaluate opportunities for innovation.

Networking - 5:00 pm
Dinner - 6:00 pm
Presentation - 7:00 pm

Members: $60
Non-Members: $65

To register click here

If you are a member, remember to login first to get the member pricing. If you have any questions or problems, please e-mail support@aciillinois.com.

Please register by Monday April 15th.

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Annual Dinner 2019

To register click here

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2019 Illinois Chapter Excellence in Concrete Construction Awards

High Rise Category: 150 North Riverside
Owner: Riverside Investment & Development
Architectural Firm: Goettsch Partners
Engineering Firm: Mangusson Klemencic Associates
General Contractor: Clark Construction
Concrete Contractor: Goebel Forming
Concrete Supplier: Prairie Material

150 North Riverside is one of Chicago’s Engineering Marvels. The site is located prominently at the confluence of three branches of the Chicago River. With exposed railroad tracks on the west side of the site and the city requirement for a riverside pedestrian path on the east side, the remaining area on which to build was considered impossibly narrow. The project site is two acres, but more than 75 percent is landscaped public park, plaza, and a section of the Chicago Riverwalk. That leaves the 1.2-million-sq-ft, $270-million, 54-story, 752-ft-tall building to sit upon a narrow 47-ft-wide core. In response to multiple site challenges, the building features a tapered superstructure design to create a footprint equal to just 30 percent of the tower’s floor area. Innovative structural engineering and high-strength concrete was involved to nestle this tall building between the Amtrak rail lines and the Chicago River which lead to many engineering “firsts.” Some of these “firsts” include the development of a thin concrete central building core structure system; use of the largest rolled steel sections in the world (W36X925), and Chicago’s first liquid mass damper systems that are built with two concrete water vaults atop the building.

Infrastructure Category: IL 390 / I-290 interchange
Owner: Illinois State Toll Highway Authority
Architectural & Engineering Firm: Jacobs
General & Concrete Contractors: Judlau Contracting, Lorig Construction Co., and F.H. Paschen, S.N. Nielsen & Assoc., LLC
Concrete Suppliers: Ozinga Ready Mix Concrete, Inc., Elmhurst Chicago Stone Co., and Prairie Material

The I-290 Interchange Project has significantly improved travel and enhanced mobility for residents and commuters throughout the western Chicago suburbs. Completed in 2017, the $440 million I-290 Interchange Project included construction of 17 ramps and 15 new bridges in the interchange area between Meacham/Medinah Road and Prospect Avenue, which includes three lanes in each direction.  The project created direct access to and from Illinois Route 390 Tollway in all directions, with free-flow traffic movements. The new interchange is expected to reduce travel times by up to 35 percent.

The interchange consisted of two curved, multi-span, tri-level steel structures that crossed multiple mainline and ramp pavements. Erection of the complex steel structures required review of detailed erection plans and processes. Several locations required the installation of shoring towers to facilitate the placement and stability of the massive, nine-foot-tall girders. This interstate-to-interstate interchange project required extensive coordination with the Illinois Department of Transportation and local municipalities in order to manage the complex maintenance of traffic and enable the team to maintain travel for motorists.  Prior to construction, up to 83,000 vehicles per day utilized the ramps at the Illinois Route 390/I-290 Interchange. This was projected to increase to nearly 127,000 vehicles when the new interchange ramps opened in 2017 – an increase of more than 53 percent. Currently, up to 240,000 vehicles a day travel through the Illinois Route 390/I-290 area. By 2030, that number is expected to increase to 340,000.  These improvements are part of the $3.4 billion Elgin O’Hare Western Access Project, which is included in the Illinois Tollway’s 15-year, $14 billion capital program, Move Illinois: The Illinois Tollway Driving the Future.

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2020 Planning Meeting

Please join us on April 17, 2019 at 3:00 p.m. (prior to our monthly board meeting & presentation) at Gibsons to start preparing for the ACI Spring 2020 Convention Concrete in the Windy City (March 29-April 2, 2020).

We are currently looking for volunteers to help with this convention. Even if you have just a few hours to help coordinate activities, please let us know!

Feel free to contact any Tri-Chairs with questions:
Peter Stamatopoulos - stamatopoulosp@ecstone.com
Brad Pfanenstiel - bradleypfanenstiel@basf.com
Sarah Kilroy - skilroy@statetestingllc.com

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March Meeting Summary

It was a pleasure to have Dr. Nadelman present on Ultra-high performance concrete at the March 20th, 2019 monthly dinner meeting at Erie Street Café.  She gave a very informative and interesting presentation.  Following, she fielded many questions.  The Illinois ACI chapter greatly appreciates her time.

To begin, a brief timeline of concrete starting in 1918 was shared.  Early in the history of modern concrete, it was established that reducing water proportions will result in higher concrete strengths; Abrams’ rule! In the 1970’s, admixtures were introduced to create higher strength concrete.  She noted that Chicago’s very own Water Tower Place is one of the first structures built with modern high strength concrete.  Introducing binary and trinary cementitious combinations into concrete mixtures lead to high performance concrete.  Further reduction in water contents and advancements in admixture chemistry lead to ultra-high performance concrete mixtures. 

These UHPC mixtures are characterized by very low water cement ratios, no entrained air, fibers, sand, and NO coarse aggregates.  This combination of materials results in a dense microstructure with very low permeability.  The dense microstructure allows for very high compressive strengths, pre AND post cracking tensile strength and enhanced durability.  Typical concrete compressive strengths range from 3000 to 6000 psi; UHPC is 17,000 psi and up!  UHPC by nature is self-consolidating and is regularly used in precast applications.

Typical to many types of construction materials, many agencies and organizations have tried to define the properties of UHPC.  At this time, there are varying compressive strength UHPC qualifications.  The FHWA defines a UHPC mixture as having 21,700 psi or greater.  ACI defines UHPC at 22,000 psi whereas Canada identifies 17,400 psi.  As the name designates, performance is a critical factor to any UHPC mixture.  The performance is highly variable depending on the specific chemistry and gradation of the raw materials.  One example presented contained 46% cementitious materials and 6% water.  Unlike typical concrete mixtures, Dr. Nadelman explained how particle packing models are used to develop UHPC mixtures.  One well known model used, is the Andreasen and Andersen (A&A) model circa 1930.

The presentation included many interesting pictures and videos.  One such video showed a time lapse of how a UHPC mixture is combined.  The mixture starts as dry powder, water is added, then the dry powder turns into a cake batter-like consistency, then to a firmer dough texture, and then to a low viscosity mixture typically having an 8 to 10 inch spread over a period of 10 minutes.  This state transformation requires more mixing energy than a typical concrete; this is accomplished with a high shear pan mixture.  Another interesting aspect to UHPC is that the mixture requires heated curing.  Post cure thermal treatments are used to improve strength and durability.  Dr. Nadelman concluded the presentation by showing examples of where UHPC has been used in interesting applications such as precast bridge structures and mass concrete applications.  UHPC concrete is certainly a great solution for unique construction needs.

The ACI board and executive members truly appreciated Dr. Nadelman’s participation at the March 20th dinner.

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Upcoming Certification Sessions

Certification sessions are usually held at the ACI-IL Certification Facility: 650 W. Grand Ave., Elmhurst, IL 60126 - Suite 106

ACI-IL Certification programs include the following offerings:
Grade 1 Field Technician
Aggregate Lab Technician 1
Strength Lab Technician 1
Concrete Construction Special Inspector
Adhesive Anchor Installer
Adhesive Anchor Installer Inspector

Check the schedule below for a session or sessions of interest. Review the class listings below and register. Sessions are filling up quickly, so don’t delay!

APRIL 2019
4th - 5th - Concrete Field Testing Tech Grade 1, Lakeland College,
Mattoon, IL
16th - 17th - Concrete Field Testing Tech Grade 1, Elmhurst, IL
18th - 19th - Strength Lab Technician 1, Downers Grove, IL

MAY 2019
2nd - 3rd - Strength Lab Technician 1 - Downers Grove, IL
14th - 15th - Concrete Field Testing Tech Grade 1, Elmhurst, IL

See the ACI-IL website for course descriptions, registration forms and frequently asked questions at www.aciillinois.com.

If you need help registering just call (773)775-7558 and leave a message for our registrar Ms. Nicole Galati who will assist you with registration assistance, hotel recommendations and payment methods.

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Certification Sponsors

Thank you to our Certification Sponsors!

Certification GOLD Sponsors:

Certification SILVER Sponsors:

Interested in sponsoring?
Contact Pete Stamatopoulos at 630-804-9577.

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