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5 concrete slab with no reinforcement?
Ok to create a slab with no reinforcement, you have to remove tensile forces from the slab, this is only possible by manipulating its shape for only compressive forces, like make it a bit pyramidal or with a vault etc.
Can you pour a concrete slab onto another concrete slab?
No. Concrete won't bond to concrete. It will end up cracking.
What is a raft slab?
Also reffered to as 'slab footing' and it consists of concrete footing beams integrated into the concrete floor slab.
How big can a floating concrete slab be?
no matter how big the concrete slab is, it will never float
Definition of a concrete transfer slab?
what is a ytransfer slab
5 concrete slab with no reinforcement?
Ok to create a slab with no reinforcement, you have to remove tensile forces from the slab, this is only possible by manipulating its shape for only compressive forces, like make it a bit pyramidal or with a vault etc.
What difference suspended concrete slab between unsuspended concrete slab?
Supended slab are slab not sit on the ground directlySuspended slab is a slab supported by beams.
When was Slab-O-Concrete created?
Slab-O-Concrete was created in 1994.
Can you pour a concrete slab onto another concrete slab?
No. Concrete won't bond to concrete. It will end up cracking.
Is cracking at joints acceptable after new pour of concrete?
Cracking at expansion joints is always acceptable and is the reason for the joint itself. There are two kinds of cracks, pretty ones and ugly ones! Ugly ones are random cracks where the concrete relieves itself from drying shrinkage in a random location within the slab of concrete which is normally not appealing to the eye. Expansion joints are placed at predetermined intervals within the slab where random cracks are weakened planes in locations where cracking is predicted prior to fresh concrete placement. All concrete shrinks when it dries, the larger the slab, the greater the overall shrinkage. When the tensile strength of drying shrinkage exceeds the tensile strength of the concrete, cracking will occur. Lets just hopes it cracks in a spot where we planned it instead of a location where didn't. By the way, joints should be cut at least 25% of the depth of the slab.
What is a raft slab?
Also reffered to as 'slab footing' and it consists of concrete footing beams integrated into the concrete floor slab.
How big can a floating concrete slab be?
no matter how big the concrete slab is, it will never float
What are Advantage pre cast concrete slab than insitu concrete?
What are Advantage pre cast concrete slab than insitu concrete?
What are slab sewers?
The sewers which are under the concrete slab
Definition of a concrete transfer slab?
what is a ytransfer slab
Why is high tensile steel wire used in prestressed concrete?
To mobilise the compressive strength of the full thickness of the slab. For an explanation see below. Concrete tends to be stronger in compression than tension. If you can imagine a large flat slab of concrete that is much wider than it is thick (for example a slab to be used in the construction of the floor of an upper level of a house), it will be supported at the corners or edges. This allows the centre of the slab to deform vertically downwards (by a very small amount). This deformation due to it's own self weight generates stresses in the slab. You now need to imagine that there was a straight line drawn along the centre of the edge of the slab from one end to the other. When the slab deforms this line will become a curve or arch. This is in fact what the slab is doing - performing as an arch. This means that the lower portion of the slab (below the line will have stretched and be under tension and the upper portion of the slab will have been compressed. Now in this case the failure strength of the arch is being controlled by the tensile strength of the slab which is much lower than it's compressive strength. As such when the concrete is being formed, high tensile strength steel wires are connected to anchor points in the factory and they are stretched or placed under a tensile stress. The concrete is than poured into a mould around the steel wire and allowed to set (or cure). The concrete than adheres to the steel cable. Once the concrete has fully hardened the stell wires are cut from the anchor points and the steel wires attempt to return to their original size, This stress is transferred to the concrete as compression by friction due to the bond between the c able and concrete. Now when the concrete slab is used as a floor it begins to deform under it's own weight, however the pre-stressed steel wires already under tension act to pull the entire slab including the base back into a compressive stress state meaning that the whole of the slabs compressive strength is mobilised rather than just the upper half and this effectively acts to make the slab stronger. There are a number of differing methods of making steel reinforce pre-stressed concrete and for further information, please see the related link.
How many millimeters thick is a concrete slab typically?
A concrete slab's thickness can vary greatly depending on the application. Typically, a concrete slab varies between 500mm to thousands of millimeters.
