From the limestone quarry to the delivery of the end product, follow every step in the cement manufacturing process. Step 1: extraction of raw materials The raw materials needed to produce cement (calcium carbonate, silica, alumina and iron ore) are generally extracted from limestone rock, chalk, clayey schist or clay.
Ejecting the block: source: ApproTec, 15 March 2015 VI. Curing It is a process of controlling the setting of cement in order to acquire maximum strength. This is the last process which starts 24 hours after production. If curing is not done properly, then the final blocks will be of poor quality.