why steel is used in concrete?

Answer 1

Concrete is very resistant to compression stresses but breaks rather easily under tension... The layout of the rebars (reinforcement bars) inside the concrete element make it possible for the elements to withstand tension forces applied to it that otherwise would break it.

Answer 2

It gives the concrete extra strength. Without the steel rebar or mesh, the concrete would be very weak and could not support the weight that iit is needed to support. If you where to build a house on a concrete foundation with out this, the weight of the house would crush the foundation easily.

Answer 3

When you put steel into concrete, it becomes reinforced concrete, and becomes much stronger than plain concrete. Reinforced concrete is used in applications where the concrete will be under a lot of pressure or will carry a lot of weight, such as the foundation of a house or the structure of a bridge.

Answer 4

the first thing you should know is that there are many different types of concrete.and just as many size aggregate(stone) there is air entrained conc.fast setting conc. for winter work light weight conc the one thing they all have in common is they share the closest possible expandability and seismic properties as steel re bar steel rusts todays re bar is actually coated with a thin plastic to prevent oxidation now like someone else said conc is brittle the steel gives its properties to the conc and together they are structurly superior than when used alone placement size of bar IE 1/2 3/4 so on and so on re bar is not refer ed to as 1/2 " its a number 6 bar i believe 6 or 5 so type of conc bar size,placement and quantity all come into play the bars are usually tied to each other with twist wire all these specs are designed for a specific project by a structural engineer.its important stuff when lives are at stake .another aspect is how the conc will be cured.to fast it flakes the longer out of the sun and moistened constantly the harder the finished product

Answer 5

Concrete is very good in compression

the steel bars are stretched almost to their elastic limit when the concrete is poured

this is 'pre-stressed' concrete

it is very strong and will stand heavy loads bcoz the steel keeps it in compression

Answer 6

Concrete alone takes compression well, but it's brittle.

By adding the reinforcing rods, the concrete shares in the steel's resistance to torque (twisting or bending).

Answer 7

The steel bars that are placed in concrete foundations and such are there because they reinforce the concrete, adding strength. Hope that helps.

Answer 8

What do you mean, like rerod?

Steel is used to reinforce concrete. A slab of concrete is much sturdier if rerod is inside it.

Answer 9

To make it strong, to hold it together so it wont crack, its called reinforcing, usually like in buildings or driveways which carry heavy traffic they lay reo rod down first then pour concrete in, the rod holds everything together and makes the concreted area strong, otherwise big peices might break off.

Answer 10

to strengthen it ,also wire mesh ,chicken wire ,iron grids
and wire ,depending on the job
the concrete is strong but in an earthquake ,for example could break in several parts and fall down ,with the steel and iron supports it only cracks but never falls apart