Welcome to the Concrete Podcast—where concrete finishers, engineers, GCs, ready mix producers, researchers, innovators, and DOT officials come together to share real conversations about materials, methods, and the challenges we’re solving across the concrete industry.
In Episode 11 of The Concrete Podcast: Unifying the Industry, Joe Shudderley and Joel Cookston travel to Alexandria, Minnesota for the podcast’s first live audience event. Instead of a scripted presentation, this episode becomes an open forum where the audience asks the questions that many people across the concrete industry are already thinking about.
The discussion covers the origins of E5 Nano Silica, modern concrete material changes, Type 1L cement, finishing timing, water demand, curing, durability, surface issues, admixture compatibility, and the need for better communication across the entire concrete supply chain.
Watch the latest episode of The Concrete Podcast from E5 Nano Silica below
Episode 11 of The Concrete Podcast answers live audience questions from Alexandria, Minnesota about modern concrete challenges, Type 1L cement, finishing issues, curing, and E5 Nano Silica technology. The episode explains why better concrete performance depends on communication, water control, material understanding, and collaboration between contractors, producers, engineers, and suppliers.
The episode opens in Alexandria, Minnesota, where Joe and Joel welcome a live room of concrete professionals. The event was made possible with support from Concrete Solutions, and the format immediately sets the tone: this is not a sales pitch or a one-way lecture.
It is a conversation.
The audience includes people who place concrete, produce it, specify it, work with it, and deal with the real consequences when concrete does not perform the way it should. That makes the Q&A format valuable because the questions come directly from the field.
From surface delamination and scaling to plastic shrinkage cracking, finishing problems, Type 1L cement, curing methods, and admixture behavior, Episode 11 focuses on the issues that contractors and producers are seeing every day.
Joe begins the episode by sharing his background as a third-generation concrete finisher. He explains that he grew up in the field, started working with concrete at a young age, and eventually grew a concrete company that poured significant annual volume.
That background matters because E5 was not developed from theory alone.
It came from the field.
Joe explains that many of the concrete problems he saw earlier in his career started to increase as supplementary cementitious materials, curing compounds, and changing cement systems became more common. He was introduced to early colloidal silica technology through Chris Wolf, a ready-mix technical director who focused on building concrete mixes around what finishers needed in the field.
At first, Joe was skeptical. But after testing the material on surface issues and seeing how it affected finishing behavior and water control, he began studying it more seriously.
That field-first approach became part of E5’s identity: test it, touch it, understand it, and do not ask other finishers to trust something until it has been proven under real working conditions.
Image: The Concrete Podcast Episode 11: Live audience in Alexandria, Minnesota asking concrete industry questions to E5 Nano Silica
A major theme in Episode 11 is that concrete has changed.
Joe explains that as cement chemistry shifted, especially with the move toward Type 1L cement, he began seeing differences in bleed rates, set timing, surface feel, abrasion resistance, and finishing behavior.
Those changes matter because many contractors were trained on older concrete systems. What worked with Type I cement may not work the same way with Type 1L cement, different limestone contents, new grinding aids, and modern admixture packages.
The episode makes one thing clear: when materials change but field education does not, the risk often lands on the people finishing the concrete.
That is why the conversation repeatedly comes back to transparency. If cement manufacturers, admixture suppliers, ready-mix producers, engineers, and contractors are not sharing information, the field is left guessing.
One of the strongest technical discussions in the episode centers on Type 1L cement and how it affects finishing timing.
Joe explains that when limestone content increases, the concrete can behave differently. In his experience and testing, the industry has seen concerns around slower bleed rates, altered set behavior, water reducer performance, abrasion resistance, and surface durability.
For finishers, the bleed rate matters because it influences when they can safely work the slab.
If bleed water is trapped beneath the surface, problems like delamination, scaling, and weak surface layers can follow. If the surface appears ready before the internal moisture behavior has caught up, crews may begin finishing too soon.
That is why Joe warns against treating every surface issue as a simple finishing mistake. Sometimes the problem starts much earlier, with mix chemistry, water balance, cement fineness, limestone content, or admixture compatibility.
The episode also challenges one of the most common responses to concrete failure: “You should have cured it better.”
Joe does not dismiss curing. In fact, he explains that temperature and moisture control are both critical. But he argues that traditional curing methods do not always solve internal concrete problems.
His point is that many surface problems begin inside the concrete system.
If internal stresses, moisture movement, hydration issues, or material incompatibilities are already present, simply applying more curing compound or wet curing at the wrong time may not solve the root cause.
Timing matters.
For example, putting wet cure or curing compound on too early can interfere with bleed water and surface behavior. On overlays, Joe still supports wet cure because thin sections need temperature control. But he emphasizes that curing should be understood as part of a larger system, not a blanket excuse or one-size-fits-all fix.
A key part of the live Q&A focuses on internal curing and how E5 approaches moisture management.
Joe explains that E5 Internal Cure was named because the technology helps hold more water inside the concrete matrix, supporting hydration and helping create a denser internal structure. He also explains that E5’s nano-sized particles are designed to fit between cement grains and influence how water moves through the concrete.
The goal is not to replace good practices.
The goal is to help concrete control water more effectively.
That matters because water is one of the biggest variables in concrete performance. Too much water can weaken the system. Too little usable water can contribute to workability problems, dehydration, cracking, and poor surface development.
E5’s internal curing approach is positioned as a way to help keep water where the concrete needs it, giving the system a better chance to hydrate, densify, and resist surface-related problems.
Joel and Joe also discuss particle packing, which is one of the easiest ways to understand how nano silica can influence concrete performance.
Concrete is made up of materials at different sizes: coarse aggregate, fine aggregate, cement particles, and paste. When those materials are packed more efficiently, the concrete can become denser and less porous.
Joe explains that E5 works within the paste system by introducing very small silica particles that help fill space, influence water movement, and support hydration.
The result is not magic. It is material science combined with field experience.
By helping keep water and particles in place, E5 can support stronger particle packing, improved density, and better durability outcomes when the rest of the mix design and placement process are handled correctly.
The live audience also asks about E5 Liquid Fly Ash.
Joe explains that E5 Liquid Fly Ash was developed after seeing recurring issues with fly ash availability, air stability, and consistency. The product is not traditional fly ash. Instead, it is a liquid nano-silica technology designed to help create some of the performance effects associated with supplementary cementitious materials while supporting better consistency and stability in certain mix designs.
The episode makes an important distinction: E5 Liquid Fly Ash is not presented as a simple one-for-one replacement in every situation.
Instead, Joe describes it as a tool that can enhance SCM strategies, help stabilize certain systems, and support mix adjustments when producers are trying to improve consistency, hydration behavior, and field performance.
Beyond the technical details, Episode 11 keeps returning to one central industry problem: communication.
Joe explains that when he was a contractor, his best ready-mix relationships worked because the producer cared about what the finisher needed. They communicated about aggregate changes, material changes, timing, and field performance. That partnership helped reduce risk for both sides.
But after entering the broader industry, he saw how fractured the system could be.
Contractors blame producers. Producers blame finishers. Engineers rely on specifications. Cement and admixture suppliers may not fully explain material changes. Everyone tries to protect themselves from risk.
The result is an industry where problems repeat because the right people are not always in the same conversation early enough.
Episode 11 argues that the path forward is not more finger-pointing. It is better transparency, shared field data, honest technical discussion, and a willingness to listen across disciplines.
One of the clearest messages from the episode is that strength is not the only measure that matters.
Concrete can hit its required PSI and still be difficult to place, finish, cure, or maintain. If a mix is too sticky, closes too quickly, traps bleed water, has poor timing, or creates surface problems, then the contractor still carries risk even when the lab numbers look acceptable.
Joe emphasizes that finishers are often the last line of defense for good concrete.
They are the last people to touch it, and they are often the first people blamed when something goes wrong. But they do not control every variable that affects the final result.
That is why finishability, workability, timing, moisture behavior, and surface durability need to be part of the conversation from the beginning.
Episode 11 gives the industry several practical reminders:
Modern materials may require different timing, tools, curing decisions, and finishing methods.
Surface issues can be connected to cement chemistry, bleed rate, water reducer performance, water demand, vibration, curing timing, or aggregate behavior.
Overcomplicated admixture packages can make it harder to diagnose problems when something goes wrong.
Contractors and ready-mix producers should talk through expectations, weather, timing, mix behavior, risk, and jobsite conditions before the truck arrives.
Concrete performance depends on materials, proportioning, batching, delivery, placement, finishing, curing, temperature, water movement, and long-term exposure.
The Alexandria live event reflects the purpose of The Concrete Podcast: to bring the industry together through open discussion.
Concrete is changing. Cement systems are changing. Admixtures are changing. Labor availability is changing. Project expectations are changing.
The industry cannot solve those challenges in isolation.
Contractors need producers. Producers need feedback from the field. Engineers need to understand constructability. Manufacturers need to explain material changes. Owners need durable results. And everyone needs better information before the concrete hits the ground.
Episode 11 is valuable because it puts those voices in the same room.
That is how the industry gets better.
Episode 11 is one of the most direct and interactive conversations so far from The Concrete Podcast: Unifying the Industry.
Recorded live in Alexandria, Minnesota, this episode answers real questions from contractors, ready-mix producers, engineers, and concrete professionals about Type 1L cement, curing, finishing, water control, durability, and E5 Nano Silica technology.
Watch Episode 11: The Questions the Industry Wanted Answered | A Live Audience in Alexandria, MN
The Concrete Podcast: Unifying the Industry brings together contractors, producers, engineers, owners, researchers, manufacturers, and educators for honest conversations about the challenges shaping modern concrete construction.
The goal is simple: help the industry build better concrete through open discussion, practical experience, and technical education.
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