Concrete is an important part of concrete. The major raw materials for the production of cement are three. These are marl, clay, and also limestone. They are acquired in quarries by blowing up. They are likewise obtained by tearing with heavy tools.
Wheel loaders plus unload trucks both transport these resources to the squashing plants. There the rock is roughly squashed to the dimension of roadway gravel.
This material is called raw ballast and also is delivered to the ballast hall of the concrete functions using conveyor belts, cable cars, or trains and also, in phenomenal situations, also by truck, where it is saved in a mixed bed as well as homogenized (leveled).
Furthermore, the essential raw mix of pulped stone and the required additives (iron ore and quartz sand) is created by making use of metering tools. The mixture is ground to a great flour in a bowl or round mill and dried out at the same time as the warm exhaust gas from the burning procedure before it reaches the cement bin.
The burning of the raw dish to cement clinker at 1,450 ° C – one of the most essential procedures in concrete manufacturing – happens in rotating kilns, which function according to different procedures as well as vary mainly in the preparation and also preheating of the product to be melted. After shedding, the clinker is cooled down and also kept in clinker silos.
Concrete mills grind the clinker with the addition of plaster, anhydrite, and also often other additives, such as e.g. As limestone, blast heater slag, or fly ash, to seal.
Concrete is generally supplied wholesale as well as filled onto roadway or rail cars or ships using terminals. A slip of a proportion of this built concrete reaches the customer in tins or sacks, full of roto packers. They are then assembled by automatic palletizing systems.