Hello!
We are going to cast our own slabs for the driveway.
About 6-8 cm thick concrete with reinforcement.
The slabs are 50x180cm large.
We bought reinforcement mesh at Biltema, but noticed that they look completely different than what I am used to. They are not ribbed but completely round and zinc-plated.
I am a bit unsure if this will work well or if I should return it.
Has anyone tried or knows the function of the ribs?
Grateful for any help!
We are going to cast our own slabs for the driveway.
About 6-8 cm thick concrete with reinforcement.
The slabs are 50x180cm large.
We bought reinforcement mesh at Biltema, but noticed that they look completely different than what I am used to. They are not ribbed but completely round and zinc-plated.
I am a bit unsure if this will work well or if I should return it.
Has anyone tried or knows the function of the ribs?
Grateful for any help!
If you need reinforcement, it should probably have 5 cm to air if I remember correctly. Otherwise, there is a risk that the reinforcement will rust in the construction and then explode. One method is to instead cast a slab with a solid cement mixture and then cut in proper crack inducers. Easier than making molds and casting one by one, quite a job if there are many. Crack inducers can also be made in slightly varying patterns.
I also read 5cm somewhere.T tobiast said:
Thinking that the reinforcement should be near the bottom.
I would prefer to have smooth and nice slabs without patterns. Actually, I am wondering if reinforcement is necessary. If you buy stone slabs for the driveway, they probably don't have any reinforcement? Possibly fiber.
The position of the reinforcement depends on what function it should have. I would have placed it high and low since reinforcement is not extremely expensive.
No, store-bought slabs don't have reinforcement as far as I know, possibly if they are larger and thicker slabs. You can make the crack indications look just like they are laid slabs. The trick is the cement mixture. A good cement classification, mixing, and careful mixing for strength, i.e., a lot of cement, less water, a good and well-adapted ballast. Check with professionals, not stores but craftsmen. I'm considering casting slabs for my greenhouse this fall. How many slabs are you going to cast, what are the dimensions, and how were you planning to proceed?J Juniperus said:
1. Reinforcement is extremely expensiveB BosseHansson said:
2. It's difficult to fit low and high reinforcement in a 6cm thick slab, especially if you intend to have 5cm coverage.
180cm is a damn long slab. Were you planning for these to be cast in place or are you going to lift them into place?
The slabs should be large, so they will be cast in place and then they will remain there. 50x180cm. I want it to look like a single large slab, so I want to find a solution where we can avoid creating grooves.
Reinforcement at 2cm above the ground and then at least 5cm on top, I hope will work. It’s primarily to handle the load of a car, so reinforcement at depth ensures it can withstand it. Then there is a risk of small cracks if we don't reinforce high, of course.
I will buy concrete from swerock as I am doing the garage slab at the same time.
SWEFROST40 C35/45 S4 DMAX 16 STDCEM XC4, XF2, XS3, XD3, XA1
Precast slabs are usually from 4 cm thick and up to 8 cm. And they are usually intended for parking at those dimensions. Larger slabs provide greater thickness, but I believe without reinforcement.
Reinforcement at 2cm above the ground and then at least 5cm on top, I hope will work. It’s primarily to handle the load of a car, so reinforcement at depth ensures it can withstand it. Then there is a risk of small cracks if we don't reinforce high, of course.
I will buy concrete from swerock as I am doing the garage slab at the same time.
SWEFROST40 C35/45 S4 DMAX 16 STDCEM XC4, XF2, XS3, XD3, XA1
Precast slabs are usually from 4 cm thick and up to 8 cm. And they are usually intended for parking at those dimensions. Larger slabs provide greater thickness, but I believe without reinforcement.
50x180cm large slabs. A total of 12 pieces. Cast in place in a mold. I was thinking of settling for 5-8 cm, but maybe I should add some thickness and dig in a bit instead. Reinforcement just below the middle to achieve both good load capacity and crack protection. The concrete will come from a concrete truck delivery with a chute.T tobiast said:
Ok. I assume they are placed edge to edge with each other? When you've cast the first one, how will you have room for the mold when you shape the next one so that there is an acceptably thin joint between them?J Juniperus said:
Best answer
The function of the ribs on reinforcement bars is to increase the bond strength between the reinforcement and the concrete.
If such types of bars have been calculated in the design (which is the most common), one should ensure that the reinforcement has that profile.
If such types of bars have been calculated in the design (which is the most common), one should ensure that the reinforcement has that profile.
From my own experience, I know that bilbutterix putsnät clearly has inferior strength compared to other "brand nets."
Thanks for answering the question!S scorp1on said:
Although I haven't calculated it, I'm trying to adhere to some kind of established construction practice. So if ribs are what's needed, then I probably have to stick to that. I don't know if I can calculate that myself. Is there any template online that I can use?