As we all know that the waste from the industries is very harmful for the environment as well as 
to  our  health,  if  not  disposed  in  proper  manner.  The  residue  of  manufactured  sand  (M-sand)  after 
washing are present in enormous quantity. The M-sand residue however used to fill the basement, major 
quantity  of  the  material  is  still  disposed  into  the  water  bodies  as  waste.  The  aim  of  this  research  is  to 
avoid the wastage of M-sand and to partially replace the content of fly ash with the various % of residue 
obtained from the m-sand in the fly ash brick and also to determine the optimum % of residue for better 
results.  After  the  full  manufacturing  process  the  bricks  are  tested  in  the  laboratory  and  results  are 
analyzed  regarding  the  water  absorption  and  compressive  strength.  The  objective  of  this  research  is  to 
make economical and to reduce the fly ash content in bricks to maintain environmental balance and avoid 
problem of waste disposal. It was also expected that bricks must be lighter in weight, energy efficient and 
meet compressive strength requirements of IS 1077:199