In the second case we have a secondary crusher one example of a secondary crusher is cone crusher. Finally, the finer particles come out at the bottom. The moving jaw basically vibrates using some mechanism here and once the aggregates are fed to the movement of the jaw it breaks the aggregate into finer particles. So that the aggregate can be fed from the top and collected at the bottom. There are two figures shown above to the left the figure is without aggregate fade in it also the primary crusher essentially consists of a fixer jaw more or less vertical and there is also a moving jaw which is inclined at some angle so that the spacing at the bottom is lower compared to the spacing at the top. In this, we have primary crushers and jaw crushers are very often used for primary crushing. Crushing Or Grinding: Crushing and Grinding Machine If the aggregate sources are below water bodies, in that case, the process of dredging is used. If the source of rocks is softer, in that case, here you have soft material so stripping is used. If the rocks are hard in nature then blasting and drilling operations may be required. As you can see that depending upon the hardness of rocks, each of these operations is carried out. The above figure shows the blasting operations, drilling operations, stipping operations, and dredging operations. Extraction or Mining (Blasting, Stripping, Drilling, Dredging, etc.).Aggregate Production OperationĪggregate production operations include the following: So, the aggregate production unit consists of vibration feeder, primary crusher, secondary crusher, belt conveyors, vibrating screens, and also you have stockpiles, and we will study each one of them in detail. In the figure you can see on one side there is a natural resource available in the form of rocks and on the other side, you have the aggregate production unit which is usually installed very close to the aggregate source. The figure above you see is the aggregate production unit. Plaster, mortar, grout, filter materials, etc.Īggregates are extracted from rocks in quarries using different operations.Now aggregates are used for many civil engineering and construction applications. These rocks are originally igneous or sedimentary rocks and due to some intense heat and pressure changes.Īpplications Of Aggregates In Civil Engineering Constructions.These rocks are formed from the solidification of chemical or mineral sediment deposits.Coarse-grained rocks cool slowly than fine-grained rocks and because of that, the physical and chemical properties may be different. There are differences between coarse-grained rocks and fine-grained rocks.
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