RAT-TRAP BOND TECHNOLOGY

Rat-trap bond, also known as Chinese bond, is a type of garden wall bond similar to Flemish, but consisting of rowlocks and shiners instead of headers and stretchers (the stretchers and headers are laid on their sides, with the bed face of the stretcher facing outward). This gives a wall with an internal cavity bridged by the headers, hence the name. The main advantage of this bond is economy in use of bricks, giving a wall of one-brick thickness with fewer bricks than a solid bond.

But in my opinion use engish bond for strength.

Dear amit

Fly ash bricks are generally used for making curtain and partition walls of the houses/ buildings. Fly ash bricks are used in domestic building in the category of low or middle-income groups mostly have single or two storied dwelling units. Use of fly ash bricks in this type of construction is meant mainly to achieve economy and make profits.
PWD-DELHI Issues Circular for Use of Fly ash Brick
“The PWD-DELHI department Suggested Experimental Use of Fly ash bricks in Site office, Temporary Accommodation/ Boundary walls”