What is Ggbs used for?
What is Ggbs used for?
Applications. GGBS is used to make durable concrete structures in combination with ordinary Portland cement and/or other pozzolanic materials.
How does Ggbs work in concrete?
GGBS (Ground Granulated Blast-furnace Slag) is a cementitious material whose main use is in concrete and is a by-product from the blast-furnaces used to make iron. The iron ore is reduced to iron and the remaining materials form a slag that floats on top of the iron.
Does Ggbs increase strength?
By keeping the water cement ratio low as 0.35, concrete containing GGBS up to 50% can achieve high early-age strength. GGBS concrete gains more strength than the PC concrete after the age of 28 day till 56 day.
Can Ggbs replace cement?
Ground Granulated Blast-furnace Slag (GGBS) as a cement substitute. GGBS is produced through quenching the molten slag in water and then grinding it into a fine powder. Chemically it is similar to, but less reactive than, Portland cement (Pc). When mixed with water it will hydrate in a similar way to Portland cement.
Is Ggbs a pozzolanic?
A GGBS is NOT a pozzolan. The free vitreous silica, or silica aluminates like in the Pozzolanic ashes, is unwanted because it can contaminate the steel and render it useless. Nevertheless the combination of calcium / aluminum / silica / iron compounds is less reactive than in cement.
What is Ggbs list its advantages?
What is the advantage of using GGBS as replacement of cement in concrete? From structural point of view, GGBS replacement enhances lower heat of hydration, higher durability and higher resistance to sulphate and chloride attack when compared with normal ordinary concrete.
Does Ggbs make concrete stronger?
Is code for use of Ggbs in concrete?
As per IS 9013-1978 code book method of making, curing and determining compressive strength of accelerated cured concrete test specimens are done only for plain concrete. In early ages of 1982 there is no awareness of using Ground Granulated Blast Furnace Slag (GGBS), Fly ash and Silica fume.
What is in fly ash?
Fly ash consists primarily of oxides of silicon, aluminum iron and calcium. Magnesium, potassium, sodium, titanium, and sulfur are also present to a lesser degree. When used as a mineral admixture in concrete, fly ash is classified as either Class C or Class F ash based on its chemical composition.
What is the difference between fly ash and Ggbs?
There is a wide variation in the chemical properties of fly ash and GGBS. Fly ash is low in calcium oxide content but rich in silica and alumina while GGBS is relatively high in calcium oxide. The combination of these two materials can be more beneficial when used as a stabilizing agent than using them individually.
How do I activate Ggbs?
The activation of GGBS involves the initial dissolution of the solid particles by alkaline hydrolysis, followed by the polycondensation of C-(A)-S-H gel [[2], [3], [4]]. Previous studies [[5], [6], [7], [8], [9]] have shown AAS mixes to provide high strength, good durability and high resistance to chemical attack.
Is Ggbs a admixture?
Admixtures are added in concrete to improve the quality of concrete. Mineral admixtures include fly ash (FA), silica fume (SF), ground granulated blast furnace slag (GGBS), metakaolin (MK), and rice husk ash (RHA) which possess certain characteristics through which they influence the properties of concrete differently.