When concrete isn't just concrete.....

Understanding Type IL Cement: The Changes and the Challenges

If you’ve had concrete work done in the past — or talked to someone who has — you may have heard comments like:

• “Concrete doesn’t seem to finish the same anymore.”

• “Why is this curing differently than older concrete?”

• “Why are contractors talking about additives now?”

  
  

The answer often comes down to one major change in the concrete industry: the widespread transition from traditional Type I cement to Type IL cement.

A Concrete Concepts we believe in being honest about industry changes, even when we don’t necessarily love them ourselves.

So let’s talk about what Type IL cement is, why it became the new standard, and how experienced contractors manage the challenges that come with it.

What Is Type IL Cement?

Type IL (“Type 1-L”) cement is a newer blended cement that includes finely ground raw limestone mixed into traditional Portland cement.

Compared to older Type I cement, Type IL generally contains:

• More raw limestone content

• Lower carbon emissions during manufacturing

• A reduced environmental footprint

  
  

Because of this, Type IL cement has become the preferred product across much of the concrete industry in the United States.

In many regions, it is no longer optional — it’s simply what ready-mix suppliers now carry, as is the case in North Idaho.

Why Did the Industry Switch?

The main reason is environmental regulation and sustainability goals.

Type IL cement helps reduce energy usage during production, carbon dioxide emissions, and overall environmental impact of cement manufacturing.

From a sustainability standpoint, the goals make sense. The concrete industry has been under increasing pressure to reduce emissions, and Type IL cement is one way manufacturers are addressing that issue.

So Why Do Some Contractors Struggle With It?

Here’s the honest answer:

Type IL cement can behave differently than older cement products — especially during placement and finishing.

Experienced finishers across the industry have noticed changes such as faster or less predictable set times, different moisture behavior, increased sensitivity to weather conditions, more risk of surface issues if timing is off, and finishing windows that can be shorter or inconsistent

For homeowners, this doesn’t mean your concrete project is “bad” or doomed to fail.  What it does mean is that concrete today often requires:

• More attention to mix design

• Better timing during placement

• Proper curing practices

• Skilled finishing crews who understand the material

  
  

Concrete has always been part science and part craftsmanship. Type IL simply leaves less room for error.

How We Manage the Challenges

At Concrete Concepts we’ve spent significant time learning how to work successfully with Type IL cement. That includes:

• Adjusting mix strategies

• Using performance-enhancing additives when appropriate

• Closely monitoring weather conditions

• Paying attention to placement timing and curing methods

• Continuing to adapt as the industry evolves

  
  

The reality is this: the product itself may have changed, but good concrete work still comes down to experience, preparation, and craftsmanship.

One of the biggest misconceptions in construction is that “concrete is just concrete.”

It isn’t.  Even small changes in materials can affect appearance, finish quality, curing times, cracking behaviors, and long-term durability,

That’s why choosing an experienced contractor matters more today than ever before.  A crew that understands modern concrete materials can often prevent problems before they start.

Final Thoughts

The transition to Type IL cement is likely here to stay.  While many contractors miss some of the consistency and workability of older cement products, the industry is adapting — and so are we.

Our goal at Concrete Concepts is simple:  stay informed, use the best practices available, and deliver quality concrete work that lasts.

If you have questions about your project, concrete performance, or today’s materials, we’re always happy to talk honestly about the process.