Considering casting L-support in concrete...
But how long drying time should one expect if the L-support is 1m long, 40 cm at the bottom, 50cm high, and 7cm thick? One probably has to water it a couple of times a day, but for how much and how long?
It's a shame to split the mold too early!
Anyone have an idea?
/Peter
But how long drying time should one expect if the L-support is 1m long, 40 cm at the bottom, 50cm high, and 7cm thick? One probably has to water it a couple of times a day, but for how much and how long?
It's a shame to split the mold too early!
Anyone have an idea?
/Peter
Thanks for the response!
I'll try it then.
/Peter
I'll try it then.
/Peter
Yes, it's just to be able to level out the lawn a bit and make more use of the property.
No roads or buildings on what is being filled in.
/Peter
No roads or buildings on what is being filled in.
/Peter
If the concrete is made somewhat properly, you can probably remove the formwork after just one day. However, the concrete is quite far from full strength at that point, but the L-supports should hold together by themselves after about 12 hours or so, unless it's very cold during the casting.
On the other hand, the form removal itself doesn't do much damage to the concrete, so 2-4 days after feels quite reasonable.
On the other hand, the form removal itself doesn't do much damage to the concrete, so 2-4 days after feels quite reasonable.
Concrete does not harden by "drying." In fact, concrete must not dry before it reaches sufficient strength. Water is needed for the cement to hydrate. Too rapid drying can cause cracking.
How quickly concrete's strength develops depends on many factors, primarily the type of cement, temperature, and the ratio between cement and water. As a rule of thumb, one can assume that the concrete has reached 50% of its final strength after two days, 70% after seven days, and nearly 100% after a month.
If you plan to reuse the formwork, you should remove it as early as possible. The longer the concrete cures, the harder it is to clean the formwork.
How quickly concrete's strength develops depends on many factors, primarily the type of cement, temperature, and the ratio between cement and water. As a rule of thumb, one can assume that the concrete has reached 50% of its final strength after two days, 70% after seven days, and nearly 100% after a month.
If you plan to reuse the formwork, you should remove it as early as possible. The longer the concrete cures, the harder it is to clean the formwork.
Well, look at that!
Thanks for many great answers. Yes, I had planned to reuse the mold, so I made it detachable with formplyfa on the surfaces and pine on the gables. The idea is to oil everything before casting, so I hope it won't stick.
The mold is just finished and the premiere casting will be anytime now (maybe tonight, if only the rain stops). I've never cast in concrete before, so it's a bit exciting!
/Peter
Thanks for many great answers. Yes, I had planned to reuse the mold, so I made it detachable with formplyfa on the surfaces and pine on the gables. The idea is to oil everything before casting, so I hope it won't stick.
The mold is just finished and the premiere casting will be anytime now (maybe tonight, if only the rain stops). I've never cast in concrete before, so it's a bit exciting!
/Peter