What is continuously reinforced concrete?

Continuously Reinforced Concrete Pavement (CRCP) is constructed with steel reinforcing bars placed within the concrete along the entire length of the pavement. Because of its greater durability, longer life expectancy, and minimal maintenance requirements, CRCP can provide the best long-term value of any pavement type.

What are continuous slabs?

A slab which extends as a unit over three or more supports in a given direction.

What is reinforcement concrete slab?

A reinforced concrete slab is a crucial structural element and is used to provide flat surfaces(floors and ceilings) in buildings. On the basis of reinforcement provided, beam support, and the ratio of the spans, slabs are generally classified into one-way slab and two-way slab.

What is jointed reinforced concrete pavement?

Jointed reinforced concrete pavements (JRCP) contain steel mesh reinforcement (sometimes called distributed steel). In JRCP, designers intentionally increase the joint spacing and include reinforcing steel to hold together mid-panel cracks. The spacing between transverse joints is typically 30 feet or more.

How do you know if a slab is continuous?

The edge common to slab 1 and 2 is a continuous edge, similarly the edge common to slab 2 and 3 is continuous. Rest are discontinuous edges. Again, keep in mind that you have to detail (i.e. provide reinforcement) and cast (construct) the slab in such a manner that you make the edge common to the two slabs continuous.

How is reinforcement placed in slab?

Structural reinforcement is typically placed in the bottom portion of the slab thickness to increase the slab’s load capacity. Most structural slabs-on-ground have both top and bottom layers of reinforcement for controlling crack-widths and increasing load capacities.

What is the difference between dowels and rebar?

Rebar is a type of material that can be used as dowels. Yes they are made of the same material. Dowels usually refer to vertical rebar protruding from a concrete pour to attach columns and vertical components to a slab or wall. Smooth dowels are used to attach horizontal slabs at control joints between pours.

What is the area of reinforcement per unit width in concrete?

The area of reinforcement per unit width in each of these four layers shall be three quarters of the area required for the maximum midspan moment per unit width in the slab. Torsion reinforcement equal to half that described above shall be provided at a corner contained by edges over only one of which the slab is continuous.

What type of concrete is used for rectangular reinforced concrete slab?

A rectangular reinforced concrete slab is simply- supported on two masonry walls 250 mm thick and 3.75 m apart. The slab has to carry a distributed permanent action of 1.0 kN/m2(excluding slab self- weight) and a variable action of 3.0 kN/m2. The materials to be used are grade C25 concrete and grade 500 reinforcement.

What is the reinforcement in two way slab?

In two way slab main reinforcement is provided along both direction. Slabs could be simply supported, continuous or cantilever. In two way slab the corners may be held down by restraints or may be allowed to lift up. Additional torsion reinforcement is required at corners when it is restrained against uplifting as shown in Fig.1.

How does cracking affect the strength of a concrete slab?

The cracking does not affect the structure’s strength but it arises serviceability and aesthetic issues. The cracking’s control can be achieved by an additional light coherence reinforcement placed at the lower and upper slabs’ surfaces in the areas that remain otherwise unreinforced.