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Jon Belkowitz

Jon Belkowitz

Dr. Jon Belkowitz, PhD, PE, is Chief Technical Officer at Intelligent Concrete LLC, a concrete research and education consultancy, and a frequent guest on the Concrete Logic podcast.

Oct 27, 2026

8:34
That's just your face, good.
8:36
We have to assume that fly ash was the problem.
8:40
And that's a pretty big assumption because a lot of things could have caused their scaling or their early age cracking issue.
8:47
But that's what we're going to assume.
8:49
And of course, many people are going to attack that.
8:51
But let's take a step backwards.
8:54
Class F fly ash is a coal combustion residue, and that means you start with apparent material, meaning you're Mine and sorry, I'm fumbling for words here.

11 MINS LATER

20:27
Is the fly ash a possible issue or not?
6:48
you know what you're right i got
6:50
that and then he well it's science i didn't mean to be right but now that you understand the science of it because he dropped a silicate powder can you answer this lovey a silicate powder onto moisture on his hand and that kicked off the corrosive reaction at very high ph And the same thing is said for concrete.
7:11
You asked before this, why do we care? Yes.
7:17
Okay.
7:18
And we only care if something goes bad with the concrete.
7:22
Now, why do we care if it's separated into two people? The contractor only has a one-year warranty and the asset manager who has many-year warranty or has to be concerned about.
7:34
There are some silicates when used the correct way.

6 MINS LATER

13:18
I guess what I was getting at, why are customers asking for a silica? What are they hoping that the silica will do?
14:05
does datum
14:06
temperature mean? If I took that type 1 cement to a type 3, that's a faster setting cement.
14:16
My datum temperature is lower.
14:20
Meaning...
14:21
Because I'm using a finer cement that kicks off like a bat out of hell when I add water to it, it can set up in lower temperatures.
14:31
Or that maturity cycle can happen in lower temperatures.
14:36
Now, if I'm using something like
Mike DuttonSOUNDBITE_SPEAKER
18:53
degrees Celsius.
12:16
Sure, sure, sure, sure.
12:19
Why don't you, can you pull some pictures of Hoboken up that are real pictures? And I would look at, you know, Hoboken in 10th.
12:30
Or, you know, the train station there.
12:33
There's a bar called Sully's.
12:38
That's a good place to look to parking in Hoboken.
12:41
But while you're talking about that, let's go to a prime example here in Indiana.
12:48
Indiana, we are big on 50-year design life.
15:37
So what, what does that look like?

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