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Process for manufacture of speciality bricks (size 23 x 11 x 7.5 cm) through a portable C-brick machine.


Building industry.

Salient Features of Process/Technology

Raw materials e.g. flyash, sand, lime/cement are proportioned and mixed with additives along with water in a pan mixer. The bricks are shaped through c-brick machine based on vibro-compaction principle. These are then air dried for 24-48 hr, steam cured for 6 hr or wet cured for 28 days.

Status of Commercialisation

Four licensees, technology in production.

Minimum Economic Unit Size

3,000 bricks/shift

Indicative investment

Rs. 0.75 lakh.

Equipment and Machinery

C-brick machine (available from CSIR licensee), pan mixer, baby boiler.


Raw materials

Flyash, sand, lime/cement.


For further information please contact

The Director.
Central Building Research Institute, New Delhi