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Slag cement is a hydraulic cement formed when granulated blast furnace slag (GGBFS) is ground to suitable fineness and is used to replace a portion of portland cement. Once the slag has been cooled and ground to a usable fineness it is stored and shipped to suppliers throughout the United States.
Why slag is used in cement?
The use of slag in concrete has several benefits, including reduced energy, reduced greenhouse gas emissions, and reduced use of raw materials. – Granulated blast-furnace slag (GBFS)—The glassy granular material formed when molten blast-furnace slag is rapidly chilled, as by immersion in water.
What is slag cement made of?
Ground granulated blast-furnace slag, more commonly referred to as slag or slag cement, is a by-product of steel production. Slag is primarily composed of CaO, SiO2, aluminum oxide (Al2O3), and magnesium oxide (MgO).
Where is slag cement used?
Slag cement is used in virtually all concrete applications: Concrete pavements. Structures and foundations. Mass concrete applications, such as dams or retaining walls (SCIC #9, “Reducing Thermal Stress in Mass Concrete”).
Which slag is used in cement industry?
Steel-slag can be used to produce energy-saving cement by co-grinding with OPC clinker and blastfurnace slag. In such preparations OPC clinker is about 15-30%, steel-slag around 30-40% and blastfurnace slag is around 40-50%.
Is slag used in cement?
Slag cement is a hydraulic cement formed when granulated blast furnace slag (GGBFS) is ground to suitable fineness and is used to replace a portion of portland cement. It is a recovered industrial by-product of an iron blast furnace.
What is slag cement disadvantages?
The concrete using Ground Granulated Blast Furnace Slag (GGBS) has some disadvantages like as lower initial strength and higher dry shrinkage. Therefore, in this study, long term durability of concrete made with Metakaolin and GGBS under marine environment has been investigated.
Is slag cement good for construction?
Portland Slag Cement, commonly known as PSC, is blended cement. Slag is, essentially, a non-metallic product comprising of more than 90% glass with silicates and alumino-silicates of lime. PSC has been voted as the most suitable cement for mass construction because of its low heat of hydration.
Which is better fly ash or cement?
Fly ash can be a cost-effective substitute for Portland cement in many markets. By contrast, Portland cement has a very high embodied energy because its production requires a great deal of heat. Fly ash requires less water than Portland cement and is easier to use in cold weather.
What is slag used for?
Granulated blast furnace slag has been used as a raw material for cement production and as an aggregate and insulating material. and granulated slag have also been used as sand blasting shot materials.
What is slag formula?
The lead oxides are reduced by carbon forming CO and CO2 gases. To form slag, soda ash (Na2CO2) is added. The slag can generally be expressed by the formula FeSNa2S(O).
Can we use slag cement for plastering?
Best cement for plastering:- Best cement for plastering used in construction is OPC- 43 (Ordinary Portland cement grade 53) and PSC (Portland slag cement) brand of UltraTech Cement, ACC gold water shield, ACC Suraksha power, Ambuja Cement, Sagar cement, Dalmia Cement, Shri cement, Birla cement, etc.
What is the full form of PPC cement?
Portland Pozzolana Cement (PPC) is manufactured by a combination of pozzolanic materials. Pozzolana is an artificial or natural material that has silica in it in a reactive form. Along with pozzolanic materials in specific proportions, PPC also contains OPC clinker and gypsum.
What is Colour cement?
Coloured cements are made by grinding 5 to 10 percent of suitable pigments with white or ordinary gray portland cement. Air-entraining cements are made by the addition on grinding of a small amount, about 0.05 percent, of an organic agent that causes the entrainment of….
Is slag an aggregate?
Slag, generally classed as a synthetic aggregate (also called artificial aggregate), is produced by altering both physical and chemical properties of a parent material, which may be produced and processed specifically for use as synthetic aggregate.
Which is the No 1 cement in India?
UltraTech Cement Ltd Rank Indian Cement Company Revenue (Rs Cr) 1 UltraTech Cement Ltd 38,657 2 Ambuja Cements Ltd 26,646 3 ACC Ltd 15,398 4 Shree Cement Ltd 12,555.
Which cement is best for RCC?
OPC 53 Grade cement is recommended in all RCC structures like footing, column, beam and slabs, where ever initial and ultimate strength is the major structural requirement.
Which cement is best for roof?
Use of OPC 53 grade and PPC ( Portland pozzolana cement) is the best cement for roof dhalai and for all type of RCC structure like footing,slab, beam and column.
Which cement is better UltraTech or JSW?
JSW Cement Ltd is most highly rated for Job security and advancement and UltraTech Cement is most highly rated for Job security and advancement.
What is grade of UltraTech Cement?
Ultratech PPC Cement, Packing Size: 50 Kg, Grade: 43 53,43/53 Grade Packaging Type Sack Bag Grade 43 53,43/53 grade Type OPC (Ordinary Portland Cement), RHC (Rapid Hardening Cement), QSC (Quick Settling Cement) Packing Size 50 Kg Packaging Size 50 kg.
Is UltraTech Cement good?
UltraTech Cement Ltd. has been able to withstand the recent sell-off in cement counters better than peers ACC Ltd. and Ambuja Cements Ltd., despite higher valuations. While shares of ACC and Ambuja Cements slipped 13 percent and 16 percent, respectively, in May, UltraTech was able to restrict the fall to 6 percent.
Does fly ash weaken concrete?
Poor-quality fly ash can have a negative effect on concrete. The principle advantage of fly ash is reduced permeability at a low cost, but fly ash of poor quality can actually increase permeability. Some fly ash, such as that produced in a power plant, is compatible with concrete.
Does fly ash absorb water?
Percentage of water absorption in both fly ash and wood ash replaced cement mortar bricks increases as the percentage of fly ash and wood as content varies from 10 to 50%. It is also absorbed that fly ash replaced cement brick has less water absorption compared to the wood ash replaced bricks.
What is the disadvantage of using fly ash?
Disadvantages of Fly Ash The quality of fly ash can affect the quality and strength of Cement concrete. Poor quality fly ash can increase the permeability of the concrete and cause damage to the building.
