Principle of raw material selection
1.Regional principle:the selected materials should be near the block factory,so as to ensure the transportation cost.
2.Proportion principle:the porportion must be of best effect,to ensure block quality,minimize the amount of cementitious material
and low production cost.
By following these two principles,to ensure production quality and reasonable production cost,then we can get the
maximum economic benefit in the condition of high quality and high yield.