What is a twisted steel bar?

Reader ,
We normally use the Ribbed bars in the RCC work .
This article gives information on the history of these bars .
Quite interesting article.

Answer by A Quora admin:

In the US, this was an antiquated form of reinforcing that predates modern rebar. The mechanical interlock between steel and concrete is critical in reinforced concrete. Early concrete reinforcing was sometimes smooth and square. This shape did not create much friction to make a solid interlock. One solution to this problem was to twist the bar like a corkscrew with creates many teeth for a strong mechanical lock. The primary drawback to doing this is that the twisting causes the steel to work harden and become more brittle.

Here is a patent image for a twisted steel reinforcing bar, from 1884.

What is a twisted steel bar?

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s