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The ground granulated blast furnace slag (GGBFS) is a by-product of iron manufacturing, when added to concrete improves its properties such as workability.. The ground granulated blast furnace slag (GGBFS) is a by-product of iron manufacturing which when added to concrete improves its properties such as workability, strength and durability.
Granulated Blast Furnace Slag. Granulated blast furnace slag is a glassy granular material that varies, depending on the chemical composition and method of production, from a coarse, popcornlike friable structure greater than 4.75 mm (No. 4 sieve) in diameter to dense, sand-size grains passing a 4.75 mm (No. 4) sieve.
The grade of a ground granulated blast-furnace slag is based on its activity index, which is the ratio of the compressive strength of a mortar cube made with a 50% ground granulated blast-furnace slag-cement blend to that of a mortar cube made with a reference cement.
The glassy and granular material is generated when slag is rapidly chilled by immersion in water. The most common process for granulating blast furnace slag involves the use of high water volume, high pressure water jets in direct contact with the molten blast furnace slag at a .
BLAST FURNACE SLAG GRANULATION. Slag handling is an important aspect of modern blast furnace operation. Today, blast furnace slag is a saleable product (granulated slag sand used as CO 2-friendly substitute of clinker in cement production) rather than a difficult and costly waste material.
Sep 23, 2019· During the drilling process for piles we encountered water in all pile trenches and the concrete has to be casted in the water as we cannot drain the water, but contractor does not want to use water proofing admixture as ground granulated blast furnace slag (GGBS) is used in .
May 05, 2013· Blast furnace slag granulation at cast house. Blast Furnaces normally generate 250 to 350 Kg of liquid slag for every ton of hot metal produced. This molten slag is at around 1400 – 1550 deg C temperature. Till seventies blast furnace (BF) slag was considered a waste product and was being dumped at a convenient place away from the blast furnace.
Three significant types of BFS that are granulated, air-cooled, and expanded slags can be produced depending on the cooling and solidifying methods of molten slag. Granulated blast furnace slag (GBFS) is obtained by rapidly quenching the molten slag by using high-pressure water jets.
Granulated Blast Furnace Slag Granulated blast furnace slag is a glassy granular material that varies, depending on the chemical composition and method of production, from a coarse, popcornlike friable structure greater than 4.75 mm (No. 4 sieve) in diameter to dense, sand-size grains passing a 4.75 mm (No. 4) sieve.
Granulated blast furnace slag is the glassy material formed by water quenching of molten slag discharged from the blast furnaces in the iron-making industry. The water quenching process is termed granulation and its product, granulated blast furnace slag, is sand-like in appearance.
Ground Granulated Blast furnace Slag (GGBS)[1] is a by product from the blast furnaces used to make iron. These operate at a temperature of about 1500 degrees centigrade and are fed with a carefully controlled mixture of iron ore, coke and limestone. The iron ore is reduced to iron and the remaining materials from a slag
Pelletized blast furnace slag has a unit weight of about 840 kg/m 3 (52 lb/ft 3) (Emery, 1980). 8.1.1.4 Granulated Blast Furnace Slag. If the molten slag is cooled and solidified by rapid water quenching to a glassy state, little or no crystallization occurs.
Iron Blast Furnace Slag Aggregate for Concrete" in 1977 and fine BF slag aggregate as JIS A 5012 "Water Granulated Iron Blast Fur-nace Slag Aggregate for Concrete" in 1981. Thereafter, the two were unified as JIS A 5011-1 "Slag Aggregate for Concrete, Part 1 Blast Furnace Slag Aggregate". Then, in 1983, the Japan Society of Civil
Slag cement (Ground granulated blast- furnace slag): A hydraulic cement formed when granulated blast-furnace slag is ground to a suitable fineness. Granulated blast-furnace slag: The glassy, granular material formed when molten blast-furnace slag is rapidly chilled as by immersion in water. Also referred to as granules. Blast-furnace slag:
Fig 1 Granulated and air cooled BF slag. 1. Granulated blast furnace slag – When liquid slag is cooled and solidified by rapid water quenching to a glassy state, little or no crystallization occurs.This process results in the formation of sand size (or frit-like) fragments, usually with some friable clinker like material.
Granulated slag is rapidly cooled by large quantities of water to produce a sand-like granule that is primarily ground into a cement commonly known as GGBS (Ground Granulated Blast FurnaceSlag), or Type S slag cement. It is also mixed with Portland cement clinker to make a blended Type 1S cement.
How is Granulated Blast Furnace Slag made? The process of slag granulation involves pouring the molten slag through a high-pressure water spray in a granulation head, located in close proximity to the blast furnace. Granulation process is the controlled quenching of the slag in cold water which does not give time for crystalline growth to take ...
Concrete Properties / Properties of Hardened Concrete with Blast Furnace Slag (GGBFS) Posted in Concrete Properties, Concrete Technology The physical properties of Ground Granulated blast furnace slag (GGBFS) provides advantages to the concrete in fresh state as well as in its hardened state.
iron ore, iron sintering). Blast furnace slag is generated at temperatures over 1500 ºC. Blast furnace slag is quenched in water, which gives it hydraulic properties relating to its glassy structure. Granulated slag's structure depends on the temperature during quenching. The substance is mostly glassy.
To obtain glassy phase, liquid slag is normally subjected to water granulation process. Rapid cooling of liquid slag in the water prevents the crystallization of slag and breaks the slag into small particles by thermal stress. Liquid slag freezes in an amorphous granulate, called granulated BF slag.
Converting Granulated Blast Furnace Slag into Fine Aggregate 95 slags can be increased by optimizing granulation parameters such as water temperature and flow rate to produce slag sand similar to river sand. Based on this concept, several trials were conducted at blast furnace slag granulation
slag does not have the hydraulic properties of water-cooled slag. Granulated blast furnace slag was first developed in Germany in 1853 (Malhotra 1996). Ground slag has been used as a cementitious material in concrete since the begin-ning of the 1900s (Abrams 1925). Ground granulated blast-furnace slag, when used in general purpose concrete in
Granulated Blast furnace Slag is the by - product obtained in the manufacture of pig Iron in blast furnaces at around 1400° to 1500°C in the molten form. The slag is obtained by rapidly chilling the molten ash from the furnace by means of chilled water and is ground about 400 m2/kg of fineness by using state of the art grinding mill to make GGBS.
Using ground granulated blast furnace slag as an ultrafine aggregate, workability and consistency of fresh concrete can be improved, yielding a consistent mix and higher compressive and flexural strength after 3 days; that is, early age strength compared to a control mix .
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