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How can we identify the First class brick. How it helps for the building strengt

Sat Apr 10, 2010Total posts : 1
gk
gk
Join date: Apr 2010
Topic: How can we identify the First class brick. How it helps for the building strengt

How can we identify the First class brick. How it helps for the building strength.

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Wed Apr 14, 2010Post  #1
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008
Post subject: Reply-Identify brick and strength

Dear GK,

First class bricks are made from good earth which is free from saline deposits and are sand molded. You can identify the First class brick by following field tests and laboratory tests.
  • You can see the bricks should be burnt thoroughly without being vitrified and have deep red, cherry and copper color.
  • Bricks should have regular and uniform in shape and size with sharp and square edges and parallel faces.   
  • Bricks should give a clear ringing sound on being struck together and are free from flaws, cracks, chops, stones and lime.
Laboratory tests:- 
  • Bricks should not absorb water more than 20% of its own dry weight after 24 hours, immersion in cold water.
  • Bricks should have a minimum crushing strength of 105 kg per sq. cm when tested according to the specification.
  • Bricks should not show appreciable sign of efflorescence either in dry state or subsequent to soaking in water. 
 How it helps for the building strength?

First class bricks have more strength than second class and third class, as it is clear from minimum crushing strength of bricks i.e. First class bricks have minimum crushing strength 105 kg/ sq cm where as second class bricks have 70kg/ sq cm. First class bricks are fully brunt so there surface are more strong than second class bricks. For more information about bricks you can take help from the given below articles.
http://www.gharexpert.com/category/1395/Bricks-0.aspx?PL=2&Estimator=
 

Regards
S.L.Gupta

 

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