... using different mould. Brief intruduction :QTJ4-25 block making machine is a kind of automatic product ,adopts flat vibration ,mould vibration ,and ... 25000-35000 pcs/day (standard blocks)Raw Materialscrushed stone, sand, cement, dust and coal fly ash, cinder, slag, gangue, gravel, ... pavers, squares, gardens, landscaping, city constructions, etc. QTJ4-25 Full-automatic concrete block making machine