The present study evaluated the potential use of blast furnace slag bfs as forming material of untreated granular layers in pavement e. Iron ore, coke and limestone are put into the top, and preheated air is blown into the bottom. Ground granulated blast furnace slag in concrete and its. Durability properties and microstructure of ground granulated blast. All bsi british standards available online in electronic and print formats. So far, very little work has been done to measure and quantify this impact. Click download or read online button to get blast furnace simulation book now. Strength development characteristics of concrete produced. Cdic can now conduct more than 100 mechanical tests, out of which, 55 tests come under the nabl accreditation. Blast furnace simulation download ebook pdf, epub, tuebl, mobi. Blast furnace simulation download ebook pdf, epub, tuebl. The producer of the ggbs has to guarantee not to exceed a specific moisture content. Ground granulated blastfurnace slag ggbs is a green construction material used to produce durable concrete. Metallic silicates and aluminosilicates various various 94100 crystalline silica as quartz 14808607 2388784 02.
Blast furnace slag bf slag is a byproduct from blast furnace exhaust temperature of 1450. However, this statement can be considered only partially correct. This site is like a library, use search box in the widget to get ebook that you want. This material is obtained by the heating of iron ore, limestone and coke at a temperature about 1500 degree celsius. The blast furnace is a huge, steel stack lined with refractory brick. Blast furnace slag bfs is a product of iron production, which has been widely investigated and utilized, particularly as a supplementary cementitious material for cement or alkaliactivated material, owing to its high hydraulic property or alkali activation reactivity. Download ground granulated blast furnace slag ggbfs specifications pdf download ground blast furnace slag gbfs specifications pdf recommended blast furnace slag articles. Properties of hardened concrete with blast furnace slag. Blastfurnace slag article about blastfurnace slag by the. In 2006, bfs was put forward for consideration by the waste protocols project which aimed to establish the point at which bfs ceased to be waste.
Daube j, bakker r 1983 portland blastfurnace slag cement. Ground granulated blast furnace slag is used as an additive with portland cement in combination with water and aggregates to form concrete. Blast furnace slag usage and guidance for indiana by tianqi. When used as part of a portland cement concrete, slag reacts with both the water latent hydraulic reaction and the. Although partial replacement of cement by scm reduced the cement consumption, it.
Flight dynamics and sensible heat recovery of granulated blast. The compressive strength, modulus of elasticity of harden concrete were determined in the laboratory. Due to environmental and energy issues, dry centrifugal granulation has. Properties of concrete containing ground granulated blast furnace slag. Its chemistry and use with chemical admixtures technical bulletin concrete mix design introduction ground granulated blastfurnace slag ggbfs, sometimes simply referred to as slag, is a glassy granular material formed when molten blastfurnace slag is rapidly chilled, as by immersion. Throughout this procedure, the slag becomes fragmented and changed into amorphous granules glass. The qualified slag powder particles will be collected by bag dust collector, then conveyed to and stored in the silos by the air slide and elevator. Yet for benchmarking, technology choice and general carbon optimization are important elements. Blast furnace slag is formed when iron ore or iron pellets, coke and a flux either limestone or dolomite are melted together in a blast furnace. Pdf properties of concrete containing ground granulated blast. When the metallurgical smelting process is complete, the lime in the flux has been chemically combined with the aluminates and silicates of the ore and coke ash to form a nonmetallic product called blast furnace slag. Herein, the activity of al 2 o 3 a al 2 o 3 in caosio 2 al 2 o 3 mgo slag equilibrated with molten cu at 1873 k is determined by applying the reference slag method.
This action exposes fresh sites for further reaction and is supposedly responsible for enhanced slag metal reaction rates, influencing the blast furnace operations and the quality of the metal. The total slag production of a blast furnace gives an accurate and relevant. Etdry granulation of molten blast furnace slag and. As a measure of slag volume reduction, the mgo content in the sinter has been reduced to the level of 5%. Ground granulated blast furnace slag, more commonly referred to as slag or slag cement, is a byproduct of steel production. The carbon cost of slag production in the blast furnace. Slag concrete has better durability, because it has small total pore volume, proper distribution. Blast furnace slag an overview sciencedirect topics.
Download blast furnace simulation or read online books in pdf, epub, tuebl, and mobi format. That is, the relationship between slag basicity and viscosity of blast furnace operation slag alumina 16%, magnesia 57% varies depending on temperature. The ground granulated blast furnace slag ggbfs is a byproduct of iron manufacturing which when added to concrete improves its properties such as workability, strength and durability. The paper deals with corrosion resistance of cement mortars with various amounts of ground granulated blastfurnace slag ggbs. Moisture measurement of grounded granulated blast furnace slag the ggbs is a byproduct in the steel industry and sold to the cement industry as aggregate. Thus, the activity of high al 2 o 3 slag in the blast furnace slag system needs further study.
This can perhaps be explained by the vast amount of blast furnace slag available 6. Us5977224a roll press grinding aid for granulated blast. They opined that alkaliactivated slag, such as blast furnace slag, steel slag, copper slag and phosphorus slag should be a prime topic for construction materials researchers. A grinding aid and an enhanced roll press method of grinding granulated blast furnace slag by treating the slag feed of the roll press with from about 0.
Durability of mortars containing ground granulated blastfurnace. Pdf characterization of blast furnace slag for road. Granulated blast furnace slag gbfs can be used like sand as an additional aggregate for building materials. This paper presents results of detailed investigations about the alkaline activation of ground granulated blast furnace slags whose chemical. Slag cement, ground granulated blast furnace slag ggbfs, granulated blast furnace slag gbfs, slag product form. Use of aircooled blast furnace slag as coarse aggregate. Pelletized blast furnace slag, in contrast to aircooled and expanded blast furnace slag, has a relatively smooth texture and rounded shape. Blast furnance slag user guideline portland cement. In china, the steel industry produces approximately 220mt of bfs per year, and the enthalpy of those slags is approximately equivalent to. Dicalcium silicate ca 2 sio 4 14284232, merwinite ca 3 mgsi 2 o 8 8644, and gehlenite ca 2 al 2 sio 7 2563.
Ground granulated blast furnace slag ggbfs was obtained from nippon denro ispat ltd. Groundgranulated blast furnace slag ggbs or ggbfs is obtained by quenching molten iron slag a byproduct of iron and steelmaking from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine powder. Properties of concrete containing ground granulated blast furnace. The report discusses acbfs aggregate production and properties, and the properties of concrete produced with acbfs coarse aggregate. Step 2e the blast furnace slag is less dense than iron and floats on the surface. Fly ash, slag, silica fume, and natural pozzolans, chapter 3. Analysis of slag flow in blast furnace during the extraction. The majority of components in granulated blast furnace slag are various glassy metallic silicates iron, calcium, magnesium, aluminum, and titanium silicates, including. Strength and durability of concrete with blast furnace slag core. Slags, ferrous metal, blast furnace 65996692 2660020 100% the following components comprise this basic blast furnace slag product and were used for hazard determination.
For example, if it is about 14501500 degreec which is a hot metal temperature of normal operation, unless the slag basicity exceeds 1. Blast furnace busted very dangerous above 45mtr height. Determination of al2o3 activity by reference slag method in. Granulated blast furnace slag has a cellular structure resulting from rapid quenching in water, is cementitious in nature, and sets to form a solid concretelike mass. Bw pdf download a blast furnace is a type of metallurgical furnace used for. This article presented a model for the system of coal gasification with steam and blast furnace slag waste heat recovery by using the aspen plus as the simulating and modeling tool.
Jan 16, 2016 step 2d the blast furnace when running continuously, iron is run out through a tap hole, drilled into the furnace at the bottom, b. Due to light color of blast furnace slag, color of slag concrete is lighter in comparison with conventional concrete. Blast furnace slag is used as a replacement for ordinary portland cement opc. Blast furnace slag as a by product background the status of blast furnace slag bfs has been disputed with industry for a number of years. Use of aircooled blast furnace slag as coarse aggregate in. Granulated blast furnace slag is obtained by quickly chilling quenching the molten ash from the furnace with the help of water. Constrained by mass and energy balance for the entire system, the. Jis for blast furnace slag cement was first developed in 1950, in which the content of blast furnace slag was specified to be approximately 70% or less. Very few studies have been reported on use of blast furnace slag in stabilizing the soils.
Slag is primarily composed of cao, sio 2, aluminum oxide al 2 o 3, and magnesium oxide mgo. This report presents available information regarding the use of aircooled blast furnace slag acbfs as coarse aggregate in concrete pavements. Download fulltext pdf prediction of heat transport in concrete made with blast furnace slag aggregate article pdf available january 2003 with 153 reads. The ground granulated slag powder is drying by the hot air supplied by hot blast furnace, and with the help of hot air, the powder selecting is made in the separator. The blast furnace slag takes part in the concrete has a better workability with slump without water reducing agents, a higher strength at old age and low heat of water hydration. Effect of blast furnace slag powder on compressive. The primary source of blast furnace emissions is the casting operation properties and uses of iron and steel slags d. Such a slag acquires liquid mobility and trickles down the furnace away from the site where it starts distorting plastically, as soon as possible.
Blast furnace slag 70% added with clinker and ground. Mar 31, 2014 the purpose of a blast furnace is to reduce and convert iron oxides into liquid iron called hot metal. Slag is run out through a second tap hole labeled c. Bosh slag chemistry control for high pcr and low slag volume. Feb 14, 2018 blast furnace,street fighter x tekken,str xp per hour,minecraft xbox, slag xrd,strength xp per hour,exp chart,exp guide,xp per hour osrs,xp calc,xp rates,water cooling system,working and.
Granulation of blast furnace slag is the first step for its heat recovery. Ground granulated blast furnace slag, blast furnace slag sand, carbonation. The quality of raw materials iron ore, coal, and coke has a clear impact on the carbon emissions of the hot metal production in steel making. Utilisation perspective on water quenched and aircooled blast furnace slags. Ground granulated blast furnace slag is commonly used in combination with portland cement in concrete for many applications10,11 7.
While blast furnace slag has a long history of use as an industrial byproduct, going back almost 100 years in the united states and 150 years in europe 8, steel slag was less popular. In this study, ground granulated blast furnace slag an. Effect of slag chemistry on the hydration of alkaliactivated blast. Crystallization behavior of perovskite in the synthesized. Influence of fly ash and ground granulated blast furnace slag on. Moreover, deep bluegreen color shown by interior part of slag concrete and can be noticed from slag concrete broken parts, for example, after compressive strength test. Measuring moisture of grounded granulated blast furnace slag.
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