CONCRETE DESIGN MIXTURE
CONCRETE DESIGN MIXTURE
(OP)
Hi!
I am a Quantity Surveyor, and I am tired/bored of my routinary daily activities as QS. I am now trying to read some reference online about below topic yet I can't open some site due to security of our company IP. I was not also good during my school days. Hope you find time answering my queries.
I am seeking for your an assistance on what classes & design mix ratios of the following concrete design mix:
1500 psi
2000 psi
2500 psi
3000 psi
3500 psi
4000 psi
5000 psi
6000 psi
Thanks in advance...
I am a Quantity Surveyor, and I am tired/bored of my routinary daily activities as QS. I am now trying to read some reference online about below topic yet I can't open some site due to security of our company IP. I was not also good during my school days. Hope you find time answering my queries.
I am seeking for your an assistance on what classes & design mix ratios of the following concrete design mix:
1500 psi
2000 psi
2500 psi
3000 psi
3500 psi
4000 psi
5000 psi
6000 psi
Thanks in advance...





RE: CONCRETE DESIGN MIXTURE
Dik
RE: CONCRETE DESIGN MIXTURE
This is a good start.
RE: CONCRETE DESIGN MIXTURE
Good link...
Dik
RE: CONCRETE DESIGN MIXTURE
http://www.cement.org/cement-concrete-basics
ACI is also good, but may require membership and is costly to purchase the manuals and codes
https://www.concrete.org/
RE: CONCRETE DESIGN MIXTURE
jgailla, that help a lot. I'll be using that on my computation.
cvg, thank you for your response. The site you gave has a wide range of studies, I will read it little by little for me to understand it well.
Your response were related to each step I need to consider. First is the materials, then computation, then supporting studies/document for me to check my ratio. THANK YOU!!!
RE: CONCRETE DESIGN MIXTURE
Dik
RE: CONCRETE DESIGN MIXTURE
RE: CONCRETE DESIGN MIXTURE
As dik notes, there are many considerations to be made in designing, mixing and controlling concrete. The "lag time" you asked about is a function of first introduction of water into the mix. That's when all the chemical processes start and the first 90 to 120 minutes are somewhat critical with initial set of the concrete, depending a lot on temperature. As with any chemical reaction, as temperature increases, the speed of the reaction increases thus causing the concrete to set up quicker. There are a lot of factors that play into this, but this one is fundamental.
RE: CONCRETE DESIGN MIXTURE