Can i mix 2 different strength types of concrete together?


  #1  
Old 02-13-21, 11:28 AM
C
Member
Thread Starter
Join Date: Mar 2020
Posts: 33
Received 0 Votes on 0 Posts
Can i mix 2 different strength types of concrete together?

I make weights out of concrete, so it's important for them to be strong. Unfortunately my supplier stopped their delivery service and i don't own a car. So my only option now is to order it online from a different store, but they charge twice as much.

Can i order a brand concrete, and a no name concrete which is less strong, then mix it together to still have a strong concrete mix? It would save me a lot of money.

The concrete strengths where i live is labeled as C30/37.
The cheaper one is C20/25

I imagine dry mixing it before adding water would result in a C28 average? Would be fine for DIY weights?
Thank you.
 
  #2  
Old 02-13-21, 12:09 PM
Marq1's Avatar
Member
Join Date: Sep 2016
Location: USA MI
Posts: 7,513
Received 535 Votes on 495 Posts
So my only option now is to order it online
I should not be surprised in this day but having concrete delivered (and I'm assuming we're talking FedEx, not a BBS) would be a first!
 
  #3  
Old 02-13-21, 04:10 PM
C
Member
Thread Starter
Join Date: Mar 2020
Posts: 33
Received 0 Votes on 0 Posts
Some people told me if i mix some portland cement and sand etc together, the concrete i can make myself will be just as strong. Is this true?
 
  #4  
Old 02-14-21, 12:40 PM
P
Group Moderator
Join Date: Mar 2003
Location: NC, USA
Posts: 25,545
Received 966 Votes on 887 Posts
It all depends on the mix. There is nothing magical about most concrete mixes: cement, sand & aggregate.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description: