Tag: CEE

Tess Ahlborn shares her knowledge on Husky Bites, a free, interactive webinar this Monday, September 27 at 6 pm ET. Learn something new in just 20 minutes (or so), with time after for Q&A! Get the full scoop and register at mtu.edu/huskybites.

What are you doing for supper this Monday night 9/27 at 6 ET? Grab a bite with Dean Janet Callahan and Tess Ahlborn, Professor of Civil, Environmental, and Geospatial Engineering at Michigan Tech. The Portage Lake Bridge connecting Houghton and Hancock, Michigan, more commonly known as the Lift Bridge, was named as an ASCE National Historic Civil Engineering Landmark in late 2019 following a State Historic Landmark designation in 2018. 

During Husky Bites we’ll hear about the wonders of the Lift Bridge from the very trio who submitted its 300-page application to the American Society of Civil Engineers (ASCE). Prof. Ahlborn will be joined by two of her former students, Michael Prast ’19, now a timber structural engineer at Fire Tower Engineered Timber in Calumet, Michigan; and Emma Beachy ‘19, a design engineer at Corbin Consulting in Portland, Oregon. Both earned both their BS and MS degrees in civil engineering at Michigan Tech.

We’ll learn about crossings prior to the current Lift Bridge, the people involved in designing and building the Lift Bridge, and what makes the Lift Bridge so unique to the region and the nation to proudly earn the National Landmark designation. 

“Emma and Michael are two of Michigan Tech’s best students,” says Ahlborn. “I mentioned the topic of National Historic Landmarks during Bridge Design class, and let the class know I would be delighted if someone wanted to work on a nomination application for the Portage Lake Bridge. It didn’t take long for Emma and Michael to speak up, and the rest is history. I can’t thank them enough for taking on this project and seeing it through the application process!”

By the way, Prof. Ahlborn is a Michigan Tech alum, too. She earned her BS and MS at Michigan Tech, then went to University of Minnesota to earn a Doctorate of Philosophy in Civil Engineering in 1998. She’s been a member of the faculty at Michigan Tech for the past 26 years, teaching structural engineering courses focusing on concrete and the design of concrete buildings and bridges. 

She has a passion for bridges, something that began when she was quite small. “Growing up, I once told my mom I loved bridges. After that, she started taking me to look at a different bridge each week. Michigan has such beautiful bridges!” 

As the former Director of the Center for Structural Durability within the Michigan Tech Transportation Institute, Ahlborn has worked with the MDOT (Michigan Department of Transportation) and USDOT (US Department of Transportation) to seek solutions to improve the resiliency of our nation’s transportation infrastructure. 

In 2020, Ahlborn was appointed to the American Concrete Institute Committee 318, placing her in the small group of people who establish the ACI structural concrete building code used around the world, a “Supreme Court” of concrete, if you will.

“It also means her peers consider her to be one of the most knowledgeable and trustworthy among them,” says Materials Science and Engineering Professor Larry Sutter, a concrete expert in his own right, as well as associate dean of research and external relations in the College of Engineering.

After water, concrete is the most widely used substance on the planet. As a member of the committee, Ahlborn helps to chart the future of structural concrete—its safety, sustainability, technological advances and environmental impacts.

“We think of concrete almost as rock, but a big part of it is the steel,” Ahlborn said. “It’s a frame of steel bars encased in concrete. People the world over need to know, ‘How do I design with it?’ and ‘How does it behave?’ The code is based on over 100 years of research.”

Ahlborn knows the code inside and out. As a civil engineering student at Michigan Tech, she learned ACI Code 318 from civil engineering professor Bogue Sandberg, now a professor emeritus. “Over the years I have taught at least 1,500 students in the classroom about the 318 code requirements,” she said. 

As for her secrets to good teaching, she insists there aren’t any. “All you have to do is be fair and consistent and crack a joke once in a while,” said Ahlborn. 

She invites alumni to speak to her classes, and she regularly brings in current news articles relating to the course, not to mention chunks of concrete with stories to tell. All together, “it helps the students understand why what they are learning is important.” 

Ahlborn also serves as program director for all who seek a Michigan Tech online MS degree in Civil Engineering with a structural engineering focus. It’s a growing program, she says. “Most of our online graduate students are full-time working professionals taking one course per semester,” she says. “Every student’s program is tailored to their needs. They can obtain a full MSCE or a graduate certificate in, say, Structural Timber Design.  It’s a great avenue for professionals to enhance their careers.”

Prof. Ahlborn, how did you first get into engineering? What sparked your interest?

As a young kid, I was always fascinated by bridges.  It wasn’t until my high-school physics teacher asked me about my future plans. I was happy to report that I was applying to cosmetology schools, but I really liked bridges. After a few conversations, it was clear where I was heading: Civil Engineering. Soon enough, I jumped onto the structural engineering route and have loved working with bridges ever since!

Hometown?

Growing up in an all-American family in Kawkawlin, Michigan, followed by the real growing up as a student at Michigan Tech, I had the opportunity to watch the Zilwaukee bridge construction and land a dream job in the Minneapolis area designing dams, hydropower facilities, and bridges. When the engineering market slowed down, I jumped at the chance to complete a PhD. My husband, Mark, and I were blessed with twins, Jess and Jake, and chose the Keweenaw as the best place to settle down. I’m happy to share that we are now the proud grandparents of Charlie and Rory!

What do you do for fun?

I truly enjoy the outdoors and living in the Keweenaw, a very special place. Izzy, our Great Pyrenees, brings joy to our lives everyday and I love gardening, especially when she’s not running through the garden!

Michael, what first sparked your interest in engineering?

I’m originally from Holly, Michigan. I had a class in high school, Intro to Engineering, that went through some basics of the different engineering disciplines like electrical, computer modeling, and building. My favorite project was designing a balsa wood tower that was then compressed to failure. I really enjoyed it and my structure ended up being the most efficient in the class history comparing self weight to weight held. So I knew I wanted to do something with engineering and leaned towards buildings. I have been correct so far and love engineering a range of structures, mostly in heavy timber. 

How do you like to spend your spare time?

While my favorite is mountain biking, I love to hike, camp, hammock, kayak, and swim. I also have a passion for history. I’m part of the volunteer board for Painesdale Mine and Shaft and give tours of the Champion Mine shaft house, hoist house, and Captain’s office.

Emma, how did you decide upon engineering?

I was born and raised in Madison, Wisconsin. For a long time I thought I wanted to be an architect, but then, during my senior year in high school, I took classes in Physics and Calculus. I absolutely loved them! After that, structural engineering felt like the perfect middle ground between architecture, and math and physics.

Hobbies?

My hobbies mostly revolve around the outdoors. Living in Oregon now, I’m lucky that I can drive a short ways and get to the Pacific coast (I love looking for tide pools) or to the mountains (I also love hiking and backpacking). At home, I really enjoy cooking. Lately I’ve been trying out some vegetarian recipes, trying out some new and interesting ingredients. 

Russ Alger and Tony Kunnari generously shared their knowledge on Husky Bites, a free, interactive Zoom webinar hosted by Dean Janet Callahan. Here’s the link to watch a recording of his session on YouTube. Get the full scoop, including a listing of all the (60+) sessions at mtu.edu/huskybites.

What are you doing for supper this Monday night 2/8 at 6 ET? Grab a bite with Dean Janet Callahan and Russ Alger, Director of the Institute of Snow Research at Michigan Tech.

Alger knows about snow. He’s one of the world’s top go-to guys on cold climate roads and driving, with 45 years of experience and counting. During Husky Bites, he’ll talk about the natural properties of snow as well as some of the ways that snow can be used for engineering purposes.

Also joining in will be Toby Kunnari, Test Course Manager at the Keweenaw Research Center. The KRC’s test course is spread out over 1,000 acres just a few miles away from campus at Michigan Tech.

Ever since earning his BS and MS in civil engineering Michigan Tech, Alger has been working with vehicles and terrains. If there’s a way to alter strength and friction parameters on the surface of a terrain to enhance mobility, Alger can make it happen.

Whether it involves mobility in snow, or the development of pavements made entirely from snow, Alger and other Michigan Tech engineers and scientists at the Institute of Snow Research are ready to tackle the problem. They are also experts in winter maintenance of roads and runways—both anti-icing and deicing.

“The unique weather conditions on Michigan’s Keweenaw Peninsula, coupled with our large array of equipment and facilities, makes the Institute the right place to bring your research questions,” he says.

Alger studies the deformation of soil and snow particles under vehicle loads. He has characterized these terrains using standard physical property measurement techniques as well as through the use of bevameters, automated penetrometers, calorimeters, high speed imaging, and a number of other methods to extract data in harsh environments. (He’ll explain his toolbox during Husky Bites).

Alger holds a patent on a method he invented to “manufacture” snow pavements by mechanically altering the internal snow properties and developing high strengths in the snow pack.

Between 1994 and 2016 Alger took six trips to Antarctica, as part of a team that successfully scouted and created the first trail to the South Pole, needed as an alternative to flying in supplies. Every crevasse they discovered in the route had to be exposed and filled so tracked vehicles could safely pass over.

During his last trip to Antarctica in 2016 Alger went to make one snow road better—a fifteen-mile stretch from Scott Base (New Zealand’s research center) to the Pegasus runway, where supplies and people arrive in cargo jets.

He used a special groomer he and his colleagues developed at the KRC. Called a snow paver, it has the near-magical ability to turn snow into solid roadway.

“The paver works by first chewing up the snow with a miller drum, which smashes the ice crystals so they will stick together,” Alger explains. “Then comes a vibrating compactor, to get all the air out of the snow. That action compresses it enough to make a pavement.”

At Michigan Tech Alger also invented a product called SafeLane, an epoxy-aggregate mixture that is applied to roads, bridge decks, walkways and parking lots to improve traction and safety during hazardous winter conditions. Now marketed by Cargill, the product is widely used.

It’s busy season at the Institute of Snow Research, but Alger took time from his hectic schedule to answer a few questions for us in advance of Husky Bites.

Have any snow questions of your own? Alger will answer questions live via Zoom on Monday Feb. 8 during his session. Join early at 5:45 for some extra conversation, or stay after for the Q&A.

Q: Are there any best practices for preparing roadways in winter?

A: Road supervisors and crews rely heavily on the weather forecast. Air temp, pavement temp, temperature trends, precipitation rates and total amounts, wind, time of day, and more all play into the decision making process. For example, if it is going to be below 15 degrees F, it is likely that crews would consider adding something like calcium chloride to the mix since it is better at colder temps. They might just use sodium chloride above that temp since it works well and is much cheaper. The amount of deicer needed also increases as temperature decreases and there is a point where it doesn’t pay to use deicer at all except for maybe as a “kicker” for sand applications.

Here in the UP, combining salt and stamp sands seems to work pretty well to help us get around amid all the snowfall. In most of Houghton County, stamp sand is used. It’s abundant, and the County owns some stamp sand property. On top of that, stamp sand is actually a pretty good ‘grit’ for this purpose. The grain size is right to result in traction, which is the purpose of sand. It isn’t too dusty, and most importantly, it is crushed rock, so it is angular. That means it has sharp edges that help it dig into icy pavements and grip tires.

The addition of a small amount of deicer helps the stamp sand piles from freezing up. It also helps the sand particles melt into the surface of the road and stick, making a layer that acts like a piece of sandpaper. This is a pretty effective way to increase grip of tires on the surface, which is the end goal of this operation.

Q: When did you first get into engineering? What sparked your interest?

A: I became interested in engineering at a very young age and have always loved my job and profession. My father, George Alger, was a civil engineering professor at Michigan Tech for many years. His expertise was in ice-covered rivers and cold regions engineering in general. Growing up in Dollar Bay and working with him on outdoor projects, as well as being an outdoorsman myself, pointed me down that path at a young age. In 1976, my Dad, along with Michigan Tech civil engineering professors Ralph Hodek and Henry Sanford established a new curriculum at Michigan Tech, Cold Regions Engineering. I started with them that very first year. Growing up in the Copper Country helped to make me like snow for sure.

Q: Hometown, hobbies, family?

A: I have lived outside of Dollar Bay, Michigan for most of my life. I love being outdoors and especially love hunting, fishing and cooking outside. I live with my wife and one of my sons—and enjoy doing things with all of my sons, daughters and grandchildren.

Read More

Snow Going for Road-Building Engineers in Antarctica