How many types of concrete slabs exist? There are 16 many types of concrete slabs that can be used in construction projects.
What type of concrete slabs do you use?
One-Way Slabs on Beams. …
One-Way Joist Slab, or Ribbed Slab. …
Waffle Slab. …
Flat Plates. …
Flat Slabs. …
Two-Way Slabs on Beams. …
Hollow Core Slab. …
What are slabs used to do?
. A slab is a concrete structural element that can be used to create horizontal surfaces like floors, roof decks, and ceilings. A slab is usually several inches thick and supported on beams, columns, walls, or by the ground.
How many types of two-way slabs are there?
Types of Two-Way Slab: Two Way Flat Plates, Slab. Two-way Flat Slabs. Two-way Waffle Plate Slab.
How do I find out what kind of slab I have
. One-way slabs are supported by beams on opposite sides. They carry the load in one direction. The ratio of longer span (l), to shorter span(b) is considered one-way slab.
What are the 16 types of slabs used in construction?
One-Way Flat Slab. …
Two-Way Flat Slab. …
Kitchen Slab. …
Sun Shade Slab. …
Sunken Slab. …
Cable Suspension Lab. …
How long can concrete slabs last.
. Concrete slabs should last 30 to 100 year depending on how they were installed. A concrete shell can often be used to replace wood or other materials in a home or building.
Which cement is best for slab construction?
. Both OPC and PPC cements can be used to make concrete slabs. OPC cement is used most often in large-scale industrial construction, while PPC cement is used most frequently for residential constructions. PPC can be used in areas where there are more chances of sulphate attacks than OPC. It has a better sulphate resistance than OPC.
What is a mudslab?
Noun. mud slab (plural: mud slabs), (construction) A layer made of concrete that is 2 to 6 inches thick and poured above the structural slab, but below a layer of wet soil or muddy soil.
What are LX and LY?
.Ly – A longer slab span. Lx – A shorter slab span.
How many types of RCC slabs exist?
. The main types of concrete slabs used for construction are flat slab and flat plate, hollow core slab, hollow slab, waffle slab and hollow slab.
What is a 2way slab?
. A slab that is supported on all four sides by beams and the loads are carried along both directions by the supports is called a two-way slab. Two-way slabs have a ratio of shorter span (b), to longer span (l). Two-way slabs will carry the load in both directions.
What are the three types of foundations you can choose from?
. Although foundation types can vary, it is likely that your home or addition will have one or more of the following three foundations: full basement, crawlspace or concrete slab-on grade.
What are solid slabs?
.Solid slabs are concrete slabs that can be customized in width, length, and thickness. You can design and produce solid slabs with mild reinforcing, or add prestressing strands. Specialty inserts are available for lifting, mounting and connecting hardware.
How are slabs divided
.Slabs can be divided into suspended slabs. Suspended slabs can be broken down into two types: (1) slabs that are supported on the edges of beams or walls; (2) slabs that are supported directly on columns and without beams, which is known as flat slabs. … One-way slabs have the main reinforcement along the shorter span.
What is a mother slab, you ask?
. A mother slab is a common way to drain storm water from a terrace. We know that there is a joint in old and new concrete. A bonding agent between the old and new concrete is needed for every joint. This should also have the ability to bond wet concrete to older concrete.
What is PQC? concrete (PQC), and dry lean concrete(DLC) blends. DLC is an Indian sub-base layer that is commonly used to construct concrete pavement. Concrete slump with maximum aggregate-cement ratio of. 15:1. What are the different types of slabs? How do you design them?
There are two types of slabs. They can be either one-way slabs or two-way slabs, depending on their length/width ratio. They can both be simple slabs on beams or more complex slabs. Slabs on joists (ribbed slabs
) Is it better to have a slab than a crawl space?
Slabs are resistant to moisture, but they crack easily when the soil shifts. Although crawl spaces are more efficient on sloped properties, they also cost more. Crawl spaces are more durable than slabs, and they can withstand floods and earthquakes better than crawl spaces.
Are slab-built houses bad?
. Poor construction and finishing techniques can lead to uneven floors. Water or moisture can also seep through cracks in the slab, causing damage to floors finishes. Concrete slab foundations are considered to be cheap and can negatively impact the house’s resale price.
Is it common for your slab to crack? A crack in a slab that is less than 1/8 inches is considered normal shrinkage cracks and should not be considered a concern. A structural engineer may be required to review the work if the crack grows or becomes larger. What is the cement price?
Cement TypePrices per SackHigher Early Strength Cement (80 (lb.) $6 29Portland Cement I and II (94 lb.)$11. 50Masonry Cement (70 lb.)$11. 50Plastic Cement (94 lb.)$12. 00
What is the standard thickness of slab?
The standard concrete slab thickness for residential construction is four inches. Concrete that will be subject to heavy loads such as garbage trucks or motorhomes is recommended to have a thickness of five to six inches. Which is more affordable OPC or PCP?
PPC is less strong than OPC, but it hardens with proper curing. PPC is also cheaper than OPC. OPC is more suitable for fast-paced construction. Because of its high heat of hydration, it cannot be used in mass concreting.
What is a raft slab?
Rafts are made of a thick, steel reinforced slab. These slabs are then integrated with steel reinforced beams that are dug into ground for additional strength and support. This slab is also better suited for sloping blocks because the edge beams are dug in the ground and work the slab into the soil.
What is blinding concrete? Blinding concrete can be used to transfer loads from the house to good bearing. This eliminates the need for increasing the footing depth in order to reach the good bearing soil beneath. The problem areas are usually found in the soil’s top layers. What is a lean mix? Lean concrete mixes are concrete mixes with low cement content and high proportions of aggregates. They are used in many works, such as blinding concrete below foundations and leveling course beneath footings. Lean Concrete – Base – Mix Design – Strength – Purpose – Uses. What is a flat slab? A flat slab is a reinforced concrete slab with two sides. The load is transferred to the concrete columns that support it. What are distribution bars in slabs?
Main reinforcement bars are used to transfer the slab’s bending moment. Distribution bars are used to support the slabs in any direction and resist cracks and shear stress at the top.
What is a crank bar in slab Crank bars / Bent-up bars are added to the reinforcement to resist the negative bending moment/Hogging of the slab supports. The slabs with bent-up bars have a significantly higher strength and deformation capability than slabs without bent bars. What are the five types of cement?
Ordinary Portland Cement.
Water Repellant Cement.
Low Heat Cement.
High Alumina Cement.
Rapid Hardening Cement.
What is a rib slab?
. A slab system that consists of a series of parallel reinforced concrete concrete T beams, which are then framed into reinforced concrete girders. The slab is the flange and the web is the extended portion. The extended part is called ribs.
What is a plate slab? The flat plate is a reinforced concrete framing system that uses a slab with uniform thickness. This is the simplest structural shape. Flat slab is a reinforced structural system with two-way reinforcement. It can be used to support heavier loads and allow for longer spans. What are T and L beams, you ask?
The portion of the slab that acts in tandem with the beam to resist loads, is known as the Flange of the L-beam. … The beam below the flange can be called Web or Rib. The T-beams support the slab, while the L-beams support it.
How many reinforcements are contained in a slab
As per ACI Code, the minimum reinforcement in a slab shall be 0. 18% Based on the slab’s gross sectional area (BxD), and taking into account B=1m of slab width and D=overall depth, including cover, minimum reinforcement shall be=0. 18/100x x 100x D=0. 18D sq.
What is the maximum slab span?
The allowed recommended span lengths for continuous slabs are equal to 13.6m for two-way slabs and to 12.5m for unidirectional slabs. The published recommendations resulted in that the constant depth slabs are erected worldwide with the maximum span limit set at around 12/13m.
What are the 4 types of foundations?
We’ll be covering mat, individual footing, and stem wall as examples of shallow foundations. Each one has its own unique structure and can be used in a variety of ways. What is an engineered slab, you ask? A slab-on-grade foundation, also known as a floating foundation, is a structural engineering technique in which the concrete slab to serve as the foundation of a building or another structure is made from a mold that has been inserted into the ground. What is an Alaskan slab, you ask?
Pouring Alaskan Slab. An Alaskan Slab is a type of concrete slab that we use a lot. The slab’s thickened edges act as a footing for the slab foundation. The Alaskan slabs that we pour are usually 6 inches thick in the middle, and 12 to 18 inch thick around the perimeter.
What is the minimum thickness for a RCC slab?
Minimum Thickness of RCC Slab. The minimum thickness for the RCC slab should be 4’’ or 100mm. This is for sidewalks and patios. It should also be 4’’ for driveways and parking. The aggregate size will not exceed 4 inches.
What is the difference between a solid slab and a ribbed slab.
Ribbed slabs are slabs that are cast in one piece with a series closely spaced beams. Ribbed floors have the advantage of being lighter than concrete that is below the neutral axis. … Solid slabs with uniform thickness can be either one-way or both.