You Are Not Going to Lab Your Way to Better Concrete

The concrete industry's daily lab. | Concrete Logic original.

The federal government has a new plan to speed up innovation in cement and concrete.

On July 29, Oak Ridge National Laboratory announced the launch of the Center of Excellence for Advancement and Acceleration of Cement and Concrete Engineering Technologies, better known as the ACCENT Center.

You can read the official ACCENT announcement from Oak Ridge National Laboratory here.

ACCENT is a Department of Energy-backed partnership between Oak Ridge National Laboratory and the National Laboratory of the Rockies. The center will combine materials testing, artificial intelligence, computer modeling, standardized data collection and pilot-scale production.

It also plans to create a publicly accessible concrete-materials database containing independent testing, long-term durability information and performance-based data.

The goal is to cut the typical 15-to-20-year concrete innovation cycle by as much as half.

That all sounds impressive.

But I cannot get past one basic question:

Is more government really the answer to a problem government helped create?

Who Built the Box?

The announcement treats concrete’s slow innovation cycle as if it results from a shortage of laboratories, data, artificial intelligence or pilot programs.

I do not think that is the real problem.

The concrete industry already conducts research.

We already run trial batches.

We already perform pilot pours.

We already collect compressive-strength results, permeability data, shrinkage measurements, maturity data and durability test results.

The industry is not sitting around waiting for someone at a national laboratory to introduce us to testing.

The larger problem is the box that concrete has been forced to operate inside.

Specifications prescribe materials instead of performance.

Standards take years to change.

Approval processes reward familiar products.

Owners, engineers and code officials are encouraged to avoid anything that does not have decades of history behind it.

Then the government looks at the resulting 20-year adoption cycle and concludes that we need another government-sponsored center to accelerate it.

More government to fix the bureaucracy created by government.

Perhaps ACCENT will generate useful research. Oak Ridge has capabilities that individual producers and contractors will never possess.

But research alone is not what is holding the industry back.

Permission is.

We Have Already Tried Pilot Pours

The announcement places significant emphasis on moving ideas from the laboratory into pilot-scale production and eventually into commercial use.

That sounds reasonable until you consider how often this is already happening.

Data center projects have been conducting pilot pours for years.

New mixture designs are proposed. Trial slabs are placed. Testing is performed. People gather around the placement, take notes and collect data.

Then what happens?

From what I have seen, the project often returns to the same cement, the same specification and the same basic concrete it planned to use before the pilot began.

The pilot pour becomes proof that the team explored an alternative.

It does not necessarily become permission to use it.

This is especially true on data center projects, where schedule risk often outweighs nearly every other consideration. No one wants to explain that a critical placement was delayed because the project decided to become a commercial-scale research program.

The owner wants certainty.

The engineer wants compliance.

The contractor wants predictability.

The producer wants materials it can source consistently.

A successful test placement does not erase the institutional fear of being first.

I have not seen pilot pours consistently convince data center owners to adopt a genuinely new cement or concrete system across a project. Maybe ACCENT will produce a different result.

I remain skeptical.

Concrete Is Not Delivered in Its Final State

Part of the problem is that concrete is often discussed as if it were manufactured like steel, glass or drywall.

It is not.

Concrete is delivered to the project before it reaches its final state.

That makes it one of the most unique building materials we use.

The cement may have been manufactured days or weeks earlier.

The aggregates came from a local source.

The water and admixtures were added at the batch plant.

The materials were mixed in a truck.

The concrete was transported through traffic.

It may then be pumped hundreds of feet, placed by a crew, finished under changing weather conditions and cured by another group of people.

Only after all of that does it become the material we expect to perform for the next 50 or 100 years.

Think about the number of variables involved:

The chemistry and consistency of the cement.

Aggregate moisture.

Batching accuracy.

Admixture compatibility.

Mixing time.

Truck revolutions.

Travel time.

Concrete temperature.

Air temperature.

Wind.

Humidity.

Sun exposure.

Placement location.

Pump configuration.

Crew experience.

Finishing practices.

Curing timing.

Curing method.

Joint installation.

Loading and construction sequencing.

That list is still incomplete.

We have discussed these variables repeatedly on the Concrete Logic Podcast over the past four and a half years.

Concrete does not fail because the industry lacks a sufficiently large database.

It often fails because concrete is a variable material being produced and installed in a variable environment by human beings working under schedule pressure.

You are not going to lab your way out of that reality.

Start With the Cement We Are Already Buying

Before we spend another $20 million searching for the cement of the future, perhaps the industry should become more selective about the cement it uses today.

Cement is often treated like a generic commodity.

A shipment arrives at the plant. It meets the supplier’s certification requirements. It goes into the silo.

Then the concrete producer is expected to manage whatever changes come with it.

The concrete may suddenly need more water.

The air system may become less stable.

Set times may shift.

Admixture demand may change.

Finishing characteristics may be different.

Early strength may rise or fall.

The producer, contractor and testing agency are left trying to determine whether the weather changed, the aggregate moisture changed, the admixture changed, the batching changed or the cement changed.

By the time a pattern becomes obvious, thousands of yards may have been produced.

The industry needs more cement-quality and consistency testing when shipments arrive at ready-mix plants.

Not simply a mill certificate filed away for compliance.

Actual testing that helps producers understand whether the cement arriving today behaves like the cement that arrived last week.

Producers should have better tools for identifying changes in:

• Cement chemistry
• Fineness
• Sulfate balance
• Early hydration behavior
• Water demand
• Setting characteristics
• Admixture compatibility
• Strength development

That information would help producers adjust mixtures before problems appear in the field.

It would also allow the industry to reward cement suppliers that produce the most consistent product rather than treating every qualifying cement as interchangeable.

The industry does not necessarily need more types of cement.

It may need to become much more demanding about the cement it already uses.

Consistency Is Innovation

The industry’s definition of innovation has become too narrow.

Innovation is usually presented as a new binder, a new carbon-reduction technology, a new artificial intelligence model or a new product with a polished environmental declaration.

But better quality control is innovation.

Faster identification of cement variability is innovation.

Improved communication between the cement plant and ready-mix producer is innovation.

Giving batch plants practical tools to detect material changes before concrete reaches the project is innovation.

Writing specifications that allow knowledgeable concrete professionals to make performance-based decisions is innovation.

Allowing the producer to optimize the mixture for the materials actually available in its market is innovation.

Removing unnecessary bureaucratic barriers is innovation.

None of that sounds as exciting as artificial intelligence analyzing millions of data points at a national laboratory.

It may be far more useful.

Who Gets to Define Better Concrete?

The ACCENT announcement says the center will help develop resilient, cost-effective cement and concrete technologies while strengthening domestic supply chains and industrial competitiveness.

Those are good goals.

The concern is who gets to define success.

Is better concrete the mixture with the lowest theoretical carbon footprint?

Is it the mixture that produces the best laboratory durability result?

Is it the mixture that qualifies fastest under an accelerated test?

Or is it concrete that can be produced consistently, delivered reliably, placed successfully and cured properly using materials that are actually available in the local market?

Those are not always the same thing.

A mixture can look excellent in a controlled laboratory and become completely impractical on a project.

A binder can reduce calculated emissions but require more water, additional admixtures, longer curing or tighter production controls.

A product can pass a standardized test and still create problems for the people expected to place and finish it.

A material can be technically available in the United States but unavailable within an economical trucking distance of the project.

Concrete is local.

Any program attempting to standardize concrete innovation nationally needs to understand that fact.

Let the Concrete People Work

There is a role for research.

There is a role for national laboratories.

There is a role for better testing and shared data.

But those things should support the people who understand concrete, not create another layer they must satisfy.

The concrete industry already contains people who know how to improve concrete.

They work at cement plants.

They manage quality control at ready-mix operations.

They design mixtures.

They batch concrete.

They drive trucks.

They operate pumps.

They place and finish slabs.

They investigate failures.

They watch how concrete behaves when the laboratory assumptions collide with the project.

These are the people who understand that a concrete mixture is not merely a collection of ingredients.

It is a system.

Change the cement and you may change the admixture demand.

Change the water and you may change the air system.

Change the placing method and you may change the mixture requirements.

Change the weather and you may change almost everything.

The greatest obstacle to concrete innovation may not be a lack of research.

It may be the growing number of people who have the authority to control concrete without understanding how concrete actually works.

They write prescriptive requirements.

They select materials based on broad policy goals.

They add documentation and approval layers.

They demand innovation while making deviation from the familiar nearly impossible.

Then they wonder why the industry moves slowly.

Get Out of the Way

ACCENT may produce valuable information.

Its database may help researchers compare materials.

Its equipment may help evaluate new binders.

Its testing may reveal technologies worth pursuing.

I hope it does.

But another laboratory will not fix concrete.

Concrete is too dependent on local materials, production consistency, weather, logistics, workmanship, curing and project conditions.

Artificial intelligence will not eliminate those variables.

A national database will not eliminate them.

Pilot pours have not eliminated them.

The industry should focus first on better control of the materials already entering our plants, beginning with cement quality and consistency.

We should give producers more information about the cement they receive.

We should test incoming shipments more aggressively.

We should compare suppliers based on consistency and concrete performance.

We should allow qualified concrete professionals to adjust mixtures based on actual field conditions.

We should replace rigid prescriptive requirements with intelligent performance expectations where it makes sense.

Most importantly, the people who do not understand concrete need to stop building tighter boxes for the people who do.

Concrete innovation will not happen because the federal government creates another center.

It will happen when the industry becomes more selective, more accountable and more knowledgeable about the materials it already uses.

It will happen when field experience carries as much weight as laboratory modeling.

It will happen when we stop confusing compliance with quality.

And it will happen when the people who do not know concrete finally get out of the way.