Construction aggregate or aggregate is a broad category of coarse particulate material used in construction, including sand, gravel, crushed stone, slag, recycled concrete and geosynthetic aggregates. Aggregates are the most mined materials in the world.
Crushed stone or stone or angular rock is a construction aggregate. It is created by mining a suitable rock formation and then using a crusher to break down the stone into different sizes. Crushed stone differs from gravel in that gravel has a more rounded shape and is made by the natural processes of weathering and erosion.
Crushed stone has continuously been used for a variety of construction needs because of its versatility. It is one of the most common and accessible natural resources on the planet. It is one of our most abundant and basic of raw materials.
Bentonite :
All cast iron, steel & malleable iron foundries are almost using bentonite with cost efficient results, kutch region is famous for a very good sodium bentonite for casting industries. For continuous mould making also kutch bentonite is used successfully. Our foundry grade bentonite powder gives good flow ability. Compact ability and thermal stability for the production of high quality castings
Following parameters help to make high quality castings
- High gelling time which gives high strength in less mulling time
- Ph maintaining
- Active clay maintaining
- High strength on good compatibility
Fly Ash :
Fly ash is produced from the burning of pulverized coal in a coal-fired boiler. It is a fine-grained, powdery particulate material that is carried off in the flue gas and normally collected from the flue gas by means of electrostatic precipitators , bag houses, or mechanical collection devices such as cyclones.
Fly ash is commonly used in production of concrete. It is applied as a supplementary cementing material. Initially the idea was to use fly ash for economical reasons - on one hand to utilize fly ash which is an industrial by product, on the other to reduce the amount of costly cement. However, it appears that application of fly ash in concrete has a lot of benefits, mainly by reduction of unwanted hydration heat.
Cement can be replaced with fly ash in concrete. It reacts (si) with ca (oh)2 and produces more csh gel which contributes to strength. With reduced cement, hydration heat will be reduced and hence there is strength gain.
Laterite :
Laterite is a soil layer that is rich in iron oxide and derived from a wide variety of rocks weathering under strongly oxidizing and leaching conditions. It forms in tropical and sub tropical regions where the climate is humid. It is a reddish weathering product of basalt. Laterites are rusty-red in color because of high iron oxide content.
Laterite is well known in asian countries as a building material for more than 1000 years. It was excavated from the soil and cut in form of large blocks. Uses and benefits of laterite uses :
Used as a building material. Strong, hardened varieties of laterite are sometimes cut into blocks and used as brick stones for building houses.
Laterites are economically most important for ore deposits, such as bauxite. Hardened laterite varieties are also applied for the construction of simple roads. Nowadays solid lateritic gravel is readily put in aquaria where it favours the growth of tropical plants. In artifacts, monuments, sculpture, oil and gas reservoir, decoration etc. Laterite- cement blocks are more economical building units for walling units.
Silica sand is a granular material that contains quartz and minute amounts of coal, clay and other minerals. It is also known as quartz sand and industrial sand, and is largely used in several construction applications.
Silica is another name for silicon dioxide, of which quartz is a specific latticed structure. So, silica sand is quartz that over the years , through the work of water and wind , has been broken down into tiny granules.
Industrial sand is a term normally applied to high purity silica sand products with closely controlled sizing. It is a more precise product than common concrete and asphalt gravels.
From water filtration, to glass manufacture, to industrial casting, to sand blasting, to producing concrete, to adding texture to slick roads, silica sand impacts every aspect of daily life.
Granulated Blast Furnace Slag :
Granulated blast furnace slag or gbfs is the residue of combustion in the furnace of the steel refining process. It is obtained by quenching molten iron slag from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine powder. Ggbfs or ground granulated blast furnace slag is formed when gbfs is further processed or ground using conventional cement clinker grinding technology.
Uses and benefits of GBFS/GGBFS uses :
- GGBFS or GBFS is the most used raw material in cement industry to make slag cement.
- Lightweight fill
- Raw material for the manufacture of glass
- GBFS can be used as a substitute for sand in building materials
- GGBFS can be used as a replacement for portland cement
