Concret Slab: Any Downside To A Higher Strength Mix?

[lakeroadster]

I've been reading some threads on GJ about concrete slabs. Some folks say if you order 3,000 psi it will end up being 2,800 psi due to adding water at the job site.

So that brings me to my question:

Is there any disadvantage to using higher strength concrete, let's say 4,000 psi vs 3,000 psi, other than initial cost?

Is higher strength concrete more prone to having issues such as through cracking or surface cracking or some other type issue?

I'll be having a slab poured in the spring and I have specified 5" of 3,000 psi. If tossing out a bit more money for an upgrade is a good idea, I'm all in.

Thanks in advance.

John

 

[Wardster]

Talk to your concrete guy and ask him what slump he needs to work with, then talk to the redi-mix company and design a mix specifically for your application. There are plenty of chemical additives that keep the concrete workable without messing up the w:c ratio (strength).

 

[Bondo]

Is there any disadvantage to using higher strength concrete, let's say 4,000 psi vs 3,000 psi, other than initial cost?

Ayuh,.... Higher strength means it sets up slightly quicker,....

Less workin' time,...

 

[bczygan]

If you order 3000, then you should get 3000 period!

Bill

 

[lattimer17]

Not a huge difference between 4000 and 3000 psi mixes in placement. 4000 will set up a little quicker, but not a big deal.