... eight.3. Ratio of raw material:cement 8%-10% sand 30%-40% stone:50%-60%,about cement :sand : stone is1:4 ... raw material Weight.D) HY-QM4-12 automatic block making machinery guarantee:Our hollow block making machine is of one year guarantee,during the ... ,River brick,Road-rim bricks,Pathway brick.The automatic production line which can produce 30,35,40 million autoclaves bricks per yearThe ...