Surkhi,Powdered broken brick (burnt brick)

SURKHI

Surkhi,Powdered broken brick
Surkhi

Surkhi,Powdered broken brick (burnt brick) locally called surkhi is used as fine aggregate in lime mortar. Surkhi,Powdered broken brick shall be prepared by finely grinding well burnt good quality bricks free from under burnt particles of soluble salts, pyrites and adherent coatings of soil or silt. The maximum quantity of clay, fine silt and fine dust present shall not exceed five per cent by weight.

Requirements for Broken Brick (surkhi) fine Aggregate for use in Lime Mortar

[table id=4 /]

FUNCTIONS OF SURKHI IN MORTAR

Surkhi,Powdered broken brick is used as an adulterant but it imparts strength and hydraulic properties to the mortar. To develop more strength is should be ground very finely with lime in the mortar grinding mill.

Surkhi mortar is a mixture of lime,surkhi and water. It is lime morta in which sand has been substituted by surkhi for economy and strength.
Note:- surkhi is finely powdered burnt clay and genarally made from slightly under burnt bricks. Good surkhi should be perfectly clean and free from any admixture of foreign substances and should not contain particles retained on IS sieve No.9 more than 10% by weight surkhi like sand is largely used in preparation mortar,concrete,plaster etc.. For economic considerations

This type of mortar is prepared by using fully surkhi instead of sand or by replacing half of sand in case of fat lime mortar. The powder of surkhi should be fine enough to pass BIS No. 9 sieve and the residue should not be more than 10% by weight. The surkhi mortar is used for ordinary masonry work of all kinds in foundation and superstructure. But it cannot be used for plastering or pointing since surkhi is likely to disintegrate after some time”

One thought on “Surkhi,Powdered broken brick (burnt brick)

  1. NAHID JALEEL

    Good evening,
    I’m from Mangalore, Manufacturing Clay Hollow Blocks in difference variance. Apart from that we are selling the “Surkki” or Brick Power 6100 per ton as Ex factory. So if you are interested please contact us. 9946666635 or nahidpvt@gmail.com
    Thankyou

Leave a Reply