dison
Structural
- Nov 13, 2001
- 41
Is it possible to gain 4000 psi (full design strength) from normally cured (wet or membrane cure) concrete in 24 hours? How practical is this? expensive? What effect might this have on the durability of the concrete (if any)?
Several methods and products are available for obtaining high early strength. Of course, for reinforced concrete, no chloride-containing accelerators would be allowed. The ones to consider include the following (and maybe more?):
Non-corrosive, non-chloride admixture to the concrete mix to speed formation of cement gel and thus, speed the concrete cure rate.
Specialized addition to the cement itself during production (basically a special cement) that provides accelerated reaction.
Using a very high strength concrete such that the strength after 24 hours is only a small portion of the design strength (f'c >> 4000 psi).
What methods/products would be necessary? recommended?
Please also provide any resources you may know of to help in this task.
(I have posted this in the concrete engineering forum as well due to more members.) ~dison
Several methods and products are available for obtaining high early strength. Of course, for reinforced concrete, no chloride-containing accelerators would be allowed. The ones to consider include the following (and maybe more?):
Non-corrosive, non-chloride admixture to the concrete mix to speed formation of cement gel and thus, speed the concrete cure rate.
Specialized addition to the cement itself during production (basically a special cement) that provides accelerated reaction.
Using a very high strength concrete such that the strength after 24 hours is only a small portion of the design strength (f'c >> 4000 psi).
What methods/products would be necessary? recommended?
Please also provide any resources you may know of to help in this task.
(I have posted this in the concrete engineering forum as well due to more members.) ~dison
