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Gas (air) trapped in the mixture was not removed. The bubbles make the holes.
One method to reduce the holes and get a smooth finish when the formwork is removed, is to use a concrete vibrator. This tool is poked into the wet concrete before it sets and vibrates the mix to encourage air to come to the surface. It can be very effective. This also makes the concrete stronger by eliminating weaknesses caused by air pockets.
Concrete vibrators must be used carefully and should not be allowed to contact the formwork or reinforcing as they can mark the surface and move the reinforcing. Excessive use can also separate the fines and the coarse aggregate making the concrete weaker.
What else can I help you with?
Are concrete blocks cheaper then a concrete slab?
That's sort of a strange question. A concrete slab is a horizontal surface -- it's meant to be a surface you stand on or build things on. Concrete blocks are usually used for vertical surfaces -- walls. I believe that poured concrete walls are more expensive than concrete block walls. You wouldn't use concrete blocks as a substitute for a concrete slab.
Are poured concrete walls better than concrete block walls?
It depends on the application. For homes, masonry is fine as long as it is insulated well against the weather. Masonry rarely needs maintenance. Concrete walls are stronger and last longer than masonry but are more costly to construct. For basement walls, I suggest that you always use concrete walls. Above ground level, masonry is cheaper and strong enough for residential and commercial, multi-story applications. For retaining walls, 8" thick masonry works well up to about 8 feet of retained earth. Above that, the lower courses of block will get thicker to 12". You still need concrete footings for block walls.
What can you do with concrete?
With concrete and precast concrete you can build fences, walls, concrete sound walls, pre-cast concrete perimeter walls, masonry walls, masonry screen walls and more! If you are interested in having a concrete or precast fence, perimeter, sound wall, masonry wall or masonry screen wall, then go to the links below for more information. Well you can make walls, houses, bricks and so on.
What is a monolithic concrete slab?
is it a footer that is poured the same time as the slab?
How much does it cost for poured concrete?
8 dollars per acre
What are rat walls?
Concrete poured around a foundation.
How can I effectively hang things on concrete walls?
To effectively hang things on concrete walls, use a hammer drill to create pilot holes, insert wall anchors or screws into the holes, and then hang your items securely.
Are concrete blocks cheaper then a concrete slab?
That's sort of a strange question. A concrete slab is a horizontal surface -- it's meant to be a surface you stand on or build things on. Concrete blocks are usually used for vertical surfaces -- walls. I believe that poured concrete walls are more expensive than concrete block walls. You wouldn't use concrete blocks as a substitute for a concrete slab.
How can I hang items on concrete walls effectively?
To hang items on concrete walls effectively, use concrete anchors or screws designed for concrete. Drill pilot holes, insert the anchors or screws, and then hang your items securely.
How can I effectively hang stuff on concrete walls?
To effectively hang items on concrete walls, use concrete screws or anchors designed for this purpose. Drill pilot holes, insert the screws or anchors, and then hang your items securely.
What is the subject and prediceatice of the workers poured more concrete?
"Prediceatice" is not a word, so this answer assumes you meant "predicate". The subject of "The workers poured more concrete" is "workers", and the predicate (verb) is "poured". "Concrete" is the direct object.
How can I effectively fill holes in concrete walls?
To effectively fill holes in concrete walls, you can use a concrete patching compound. First, clean the hole and remove any loose debris. Then, mix the patching compound according to the instructions and apply it to the hole using a trowel. Smooth the surface and allow it to dry completely before painting or finishing as needed.
How are poured concrete wall forms used in the construction process?
Poured concrete wall forms are used in construction to create the shape and structure of concrete walls. These forms are typically made of wood, metal, or plastic and are placed in position before pouring concrete into them. Once the concrete has hardened, the forms are removed, leaving behind a solid concrete wall. This method allows for precise and consistent wall construction in various shapes and sizes.
Are poured concrete walls better than concrete block walls?
It depends on the application. For homes, masonry is fine as long as it is insulated well against the weather. Masonry rarely needs maintenance. Concrete walls are stronger and last longer than masonry but are more costly to construct. For basement walls, I suggest that you always use concrete walls. Above ground level, masonry is cheaper and strong enough for residential and commercial, multi-story applications. For retaining walls, 8" thick masonry works well up to about 8 feet of retained earth. Above that, the lower courses of block will get thicker to 12". You still need concrete footings for block walls.
How can I effectively hang pictures on concrete walls?
To effectively hang pictures on concrete walls, use concrete screws or anchors to securely attach picture hooks or hangers. Pre-drill holes in the concrete to make it easier to insert the screws or anchors. Make sure to use a level to ensure the pictures are straight before hanging them.
1 What does it means SITU concrete Construction?
insitu concrete is any concrete structure that is poured in its desired finished place. ie floor slabs of buildings because they are poured and never moved
When concrete is poured around steel bars what kind of a material does it form?
reenforced concrete
