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How do you increase an existing concrete slabs thickness?
You must form on top of the existing slab and drill in anchors to join the new concrete to the old this is called a cap
In a concrete slab where should steel reinforcing rods be embedded in slab?
A conventional slab will have two bars side by side near the top and bottom of each beam and a 16" grid across the entire top of the slab. Can't help you with a post tention... they are inventing new ways to take steel out of them every day.
Why do all concrete slabs need rebar?
When the slab is loaded and force applied to it, the top of the slab directly under the load will be put in compression. However at the bottom of the slab. the concrete will pull itself in tension. Put the ends of your fingers together than flex your wrist up. You will feel the pressure at the top of your fingertips and you will see a gap open at the bottom. That is what is happening in a slab. Concrete is strong in compression, poor in tension. Rebar, or steel, is the opposite. By combining the two, you develop a product that is superior and complimentary to the strengths and weaknesses of the individual materials.
What is the top layer of concrete called?
The top layer of concrete is called the structural coat. It directly receives the most load which must then be transferred to lower layers.
Can you stain after sealing concrete floor?
Generally no. Most stains must absorb into the concrete. If the stain just sits on top of the sealer then it will likely wear away.
How do you increase an existing concrete slabs thickness?
You must form on top of the existing slab and drill in anchors to join the new concrete to the old this is called a cap
How do you build a concrete slab?
Building a concrete slab is not difficult. Simply excavate the area where the slab is to go, and build a wooden box frame around it. Then, add crushed stone and pour the concrete on top. Finally, just smooth it out and allow it to dry.
What is a minimum thickness for a residential slab?
For a conventional slab, 3 1/2". If you go 3 1/2" on a post tension slab (and some builders do...) the tops of the cables will be just below the top of the surface and surface cracks will form above the cables. I have even seen where the power screed will cut into the black cable cover.
In a concrete slab where should steel reinforcing rods be embedded in slab?
A conventional slab will have two bars side by side near the top and bottom of each beam and a 16" grid across the entire top of the slab. Can't help you with a post tention... they are inventing new ways to take steel out of them every day.
Do all concrete slabs need rebars?
When the slab is loaded and force applied to it, the top of the slab directly under the load will be put in compression. However at the bottom of the slab. the concrete will pull itself in tension. Put the ends of your fingers together than flex your wrist up. You will feel the pressure at the top of your fingertips and you will see a gap open at the bottom. That is what is happening in a slab. Concrete is strong in compression, poor in tension. Rebar, or steel, is the opposite. By combining the two, you develop a product that is superior and complimentary to the strengths and weaknesses of the individual materials.
Why do all concrete slabs need rebar?
When the slab is loaded and force applied to it, the top of the slab directly under the load will be put in compression. However at the bottom of the slab. the concrete will pull itself in tension. Put the ends of your fingers together than flex your wrist up. You will feel the pressure at the top of your fingertips and you will see a gap open at the bottom. That is what is happening in a slab. Concrete is strong in compression, poor in tension. Rebar, or steel, is the opposite. By combining the two, you develop a product that is superior and complimentary to the strengths and weaknesses of the individual materials.
Where do you find damp proof membrane in brickwork?
Usually there is a damp-coarse just above the concrete slab or if it is a peered hose about level with the top of the piers.
How do you raise a slab foundation?
Hire someone. This is not a do-it-yourself type of project. The contractor will essentially drill holes in the low parts of the foundation and pump a new concrete mixture (although it is not pure concrete anymore) underneath your current slab, which with enough pressure, will cause it to lift. You will have to have portions of the floor removed (whatever is on top of the slab) to get down to the slab however, so costs can add up quickly, unless you just have carpet everywhere (which is easy to remove and replace).
What is the top layer of concrete called?
The top layer of concrete is called the structural coat. It directly receives the most load which must then be transferred to lower layers.
What connects walls to floors?
The wall has a bottom plate or 2x4 laying flat that is nailed to the bottom of the studs. Two top plates at the top of the wall. The wall is built, stood up and nailed down to the floor. If the house is set on a concrete slab, bolts are set in the concrete and the wall is bolted down.
What is the function of the floor screed?
The function of floor screed is to make a structural level floor surface above a waterproof membrane. It is usually made by either pumping in a special mix of self- levelling runny 'concrete - like' material or more traditionally a sharp sand and cement mix. Traditional screed is tamped by a large flat wooden or aluminum beam, which is called a screed, from which screed gets it's name. It should be very flat once finished and can be tiled once it has dried out, which can take weeks. It is usually laid over an insulation foam and often has electric heating elements or warm water pipes in it to make it into a large radiator. Thin screed needs to be reinforced to make it strong enough for the loads that are put on top of it which can be steel mesh or special fibres. This means that thinner screeds are often made up of specialist ingredients to make them self levelling and strong.
Can you stain after sealing concrete floor?
Generally no. Most stains must absorb into the concrete. If the stain just sits on top of the sealer then it will likely wear away.
