HYDRAULIC OPERATED INTERLOCKING BRICK MAKING .
Making Machine Curing of Bricks Water Supply Shaded area . 1. SOIL TYPE ... The best soil type is sandy loam (more sand than clay). Your optimum ration is 70% sand to 30% clay silt content. The reason for this is too much sand causes difficulties in handling, and too much clay causes the brick to shrink and in doing so they crack.