The Story Behind SlumpScan

Built by someone who grew up in concrete.

SlumpScan didn't start in a lab. It started at the end of a concrete chute, at age 8, with a mix that came out all wrong.

Joe Tunge at World of Concrete
Joe Tunge Founder, SlumpScan · SD Mines
The Beginning

It started at 8 years old.

My introduction to concrete work began early. My dad's decision to build storage units meant I was running the concrete chute trying to help the family business at 8 years old.

I can still remember my dad's frustration when he asked for "a wetter" mix, and it came out completely watery. That moment stuck with me — not just the frustration, but what it revealed: how much was being left to interpretation on a job site.

As I grew older, I kept seeing the same pattern. Small inconsistencies in communication creating recurring issues with the quality and speed of concrete installation. Nobody had a better answer than experience and feel.

Young Joe on a construction site Early concrete work
605 Edging

Then I started my own business.

Years later, I founded 605 Edging — installing decorative concrete curbing from scratch, managing every variable myself: water content, temperature, mix ratios, timing.

With countless mixes thrown out and many hours spent researching a solution, I realized crews everywhere were doing the same thing — relying on experience and finishing skill to paper over inconsistencies in mix design. There was no objective measurement. No standard anyone could point to on the job.

The problem wasn't skill. It was the lack of a tool that made the invisible visible.

Joe and his dad at 605 Edging Finished concrete curbing work
SD Mines & SlumpScan

Turning a long-standing frustration into a tool.

Now, as a student at SD Mines, I have both the technical foundation and the network to build the solution I always wished existed on the job site.

SlumpScan is designed to make concrete consistency measurable, reliable, and accessible — on every pour, for every crew. Not just the ones with decades of experience and a good feel for the mix.

The goal is simple: give contractors the same confidence a seasoned foreman has, backed by real data.

SlumpMeter sensor on a slump cone

The crew behind the work.

SlumpScan is built on years of real job site experience — the kind you can't learn from a textbook.

605 Edging crew

Interested in SlumpScan?

Whether you're a contractor, engineer, or ready mix supplier — we'd love to hear from you.

Get in Touch