Now a days the use of concrete in infra- structural activity is on the rise and with cement being the most important but costly component of concrete, effort to reduce the cost by partial replacement of cement with supplementary cementitious materials has gained momentum and is even made as a government regulation. However, the production of concrete is not environmentally friendly.
In this scenario, the use of conventional waste materials, such fly ash, Rice husk ash, Ground granulated blast furnace slag, silica fume, sugar cane bagasse etc. as a replacement for Portland cement in concrete presents one viable solution with multiple benefits for the sustainable development of the concrete industry. Currently, industrial waste such as Fly Ash (FA) and Rice Husk Ash (RHA) are being used as supplementary cement replacement materials. Therefore, a great potential exists to reduce the concrete industry`s contributions to greenhouse gases through reduction in cement consumption.
An artificially built up stone resulting from hardening of a mixture of a cement, aggregates, and water with or without a suitable admixture is generally known as concrete. When the materials are mixed together so has to form a workable concrete, it can be moulded into beams, and slabs etc. a few hours after mixing the material undergo a chemical combination and has a consequence the mixture solidifies and hardens attaining greater strength with age. Concrete posses a high compressive strength and has a poor tensile strength. It also develops shrinkage stresses.
Cement is the most important material used in constructions. It has adhesive and cohesive properties so as to render it to form a good bond with other materials. As it is a binder material in concrete, when it is mixed with aggregates and water it turns the particles into a whole compound and solidifies. Cement is the most important and costliest ingredient of concrete, and it is obtained by burning a mixture of the siliceous, argillaceous and calcareous material in a definite proportions.
It can be manufacture in two processes i.e., wet process and dry process. In modern plants the wet process is replaced by dry process. Dry process consumes less fuel and therefore reduces the requirement of coal. The main constituents in cement that give cementitious properties are di-calcium silicate(C2S), tri calcium silicate(C3S), tri calcium aluminate(C3A) and tetra calcium alumina ferrite(C4AF).
Xegate is active in the important Sector of Cement in the following Activities:
- Feasibility Studies & FEED
- Process Licenses
- Basic & Detail Engineering
- Management of projects with EPC(F) Contractors
- Turnkey Projects
- Operation & Maintenance of Plants
- Efficiency Improvement
- Pollution Control & Improvement