Investigation of portland blastfurnace slag cements. Properties of blastfurnace cements cem iiia, b, c based on portland cement clinker, blastfurnace slag and cement kiln dusts. Blast furnace slag cementsfly ash reference properties. 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. Certified cement, granulated blast furnace slag, and blended cement program. A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally pig iron, but also others such as lead or copper. The slag is a waste product in the manufacturing process of pigiron and it contains the basic elements of cement, namely, alumina, lime and silica. Blast furnace slag cement is the mixture of ordinary portland cement and fine granulated blast furnace slag obtained as a by product in the manufacture of steel with percent under 70% to that of cement. When this slag is actively cooled and ground, gbfs is produced, which can be utilised as a cement or concrete addition. The forging furnace is used for preheating billets and ingots to attain a forge temperature. The report discusses the following studies made to supplement the first report of this series.
Pdf properties of blastfurnace cements cem iiia, b, c. Effects of ground granulated blast furnace slag in portland cement. It results in the production of gas com pounds blast furnaces gas, of liquid slag castiron, and of solid gas dust. Figure 2 shows compressive strengths of mortars cured in a guide to the use of iron blast furnace slag in cement and concrete asa data sheet 3 3 figure 1. Forging furnaces use an open fireplace system and most of the heat is transmitted by radiation.
The iron ore concentrate is now mixed and ready for the pelletizing process. Ground granulated blast furnace slag is used as an additive with portland cement in combination with water and aggregates to form concrete. Abstract the use of blast furnace slag in civil engineering researches is becoming more popular because of its availability cum performance. Accordingly, the present invention provides an improved process for the production of portland slag cement using granulated blast furnace slag, which comprises. Ground granulated blastfurnace slag cement is a supplementary. Granulated blast furnace slag is used as a component in portland cement manufacture. Application of blast furnace slag sand in cement concretea case study 455 superplasticizer. C3s content, blastfurnace slag cement, compressive strength, autogenous shrinkage, drying shrinkage. Fly ash and blast furnace slag for cement manufacturing. Blast furnace cement in blast furnace cement, the slag as obtained from blast furnace is used. Air heated in the blast furnace stoves, is applied from the bottom of the. This study investigates the potential use of blast furnace slag as a partial replacement for cement in the production of concrete. Types of cement where the blast furnace slag is used in turkey and sales figures for 2006.
Blast furnace cement pbfc and highslag blast furnace cement hsbfc, with ggbs content ranging typically from 30 to 70% and in the production of readymixed or sitebatched durable concrete. Standard specification for slag cement for use in concrete. This report presents available information regarding the use of aircooled blast furnace slag acbfs as coarse aggregate in concrete pavements. The typical load is 5 to 6 ton with the furnace operating for 16 to 18 hours daily. Blast furnace cement an overview sciencedirect topics. Meaning, pronunciation, translations and examples log in dictionary. History and utilization of portland blast furnace slag cement. Manufactured sand msand, granulated blast furnace slag gbfs, stone crusher dust, quarry dust, washed bottom ash, sheet glass powder etc. Properties of concrete with blastfurnace slag cement made from.
Up to today, lining materials have been supplied to about 50 blast furnaces in italy and abroad always achieving excellent results and acquiring a solid reputation among the users. Blastfurnace cement definition and meaning collins english. It is a recovered industrial byproduct of an iron blast furnace. Table 1 shows the jis specifica tions of blended cements. Effects of ground granulated blast furnace slag in portland. In addition, silica fume was added at 10% cement replacement. Strength and durability of concrete with blast furnace slag core. 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. Replacement of fine aggregate by granulated blast furnace. Portland blast furnace cement simply called slag cement refers to the hydraulic binding material ground by mixing portland cement clinker, granular blast. As a world leader in the building materials industry, lafargeholcim ltd and its subsidiaries have the assets necessary to meet the building and design challenges of todays increasing urbanization. The clinkers of cement are ground with about 60 to 65 per cent of. The latent hydraulic property of the blast furnace slag gives excellent longterm strength.
Slag cement benefits and use in concrete slag cement news. Fly ash and blast furnace slag for cement manufacturing gbfs is slag from the iron production in basic oxygen furnaces. Granulated blast furnace slag is similar to the chemical composition of portland cement. Black furnace cement tub65 the home depot store finder. Cementitious applications of ground granulated blast furnace slag mf 1845 national slag association. The aim of the present work is to study the effect of cement dust substitution instead of ordinary portland cement opc, blast furnace slag cement bfsc, and sulphate resistance cement src on.
The granulated blast furnace slag may be used to make blast furnace slag cement either by being interground with the portland cement clinker or by grinding the blast furnace slag separately and then blend. Blast furnace an introduction blast furnace is the focus of any integrated steel plant. Blast furnace, a vertical shaft furnace that produces liquid metals by the reaction of a flow of air introduced under pressure into the bottom of the furnace with a mixture of metallic ore, coke, and flux fed into the top. Concrete made with ggbs cement sets more slowly than concrete made with ordinary portland. Gbfs is said to increase durability of concrete due to an increased setting time, which reduces. Pelletized blast furnace slag, in contrast to aircooled and expanded blast furnace slag, has a relatively smooth texture and rounded shape. The compressive strength development of cement mortar. The furnace temperature is maintained at around 1200 to 1250 oc.
C989 c989m18a standard specification for slag cement for use in concrete and mortars groundgranulated blast furnace slag. A portland cement mixed with a designated amount of ground granulated blast furnace slag. Blast furnace is used to reduce the iron ore to iron. Use of aircooled blast furnace slag as coarse aggregate in. Page 3 specifications although the final blended cement in the concrete is simply an improved portland blast furnace slag cement, it cannot be subjected to the ordinary cement tests. Properties significant chemoresistance, and suppression of alkaliaggregate reaction type b and c. Blast furnace slag cement manufacture, properties and uses. In c219, slag cement is defined as a blend of granulated blastfurnace slag and hydrated lime in which the slag constituent is more than a specified minimum. Grinding reduces the particle size to a cement fineness for use as a hydraulic cement, which is typically less than 3500 cm 2 g.
The samples of the cement composites were prepared with the following types of cements. Us7410537b2 process for the production of portland slag. Ground granulated blast furnace slag cement ggbfs is a fine glassy granules which contain cementatious properties. Blast refers to the combustion air being forced or supplied above atmospheric pressure. Fly ash and blast furnace slag were used in a systematic replacement of cement at the levels of 25%, 50%, and 70%. Slag cement can therefore be substituted for opc in a wide range of equal mass replacement ratios. Blast furnance slag user guideline portland cement. Pdf properties of blastfurnace cements cem iiia, b, c based on.
Blast furnace slag an overview sciencedirect topics. A study of effects of abbreviated moistcuring of concrete revealed no indications that concrete containing portland blast furnace slag cements is more adversely affected than type ii cement concrete. Pelletizing a pellet plant contains a series of balling drums where the iron ore concentrate is formed into soft pellets, in much the same manner that one rolls a snowball, to make a pellet about the size of a marble between 14 and 12. Effects of ground granulated blast furnace slag in portland cement concrete pccwisconsin highway research program whrp 0701 irene k. 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. Chloride ion penetration after immersion in seawater for 3 years. Minnesota department of transportation mndot will only accept cementitious materials from the mndot certified sources list.
Zulu 1, shingo miyazawa 2 and nobukazu nito 3 1 graduate school of engineering, ashikaga university, ashikaga 326 8558, japan. The mixed amount of granular blast furnace slag in cement is 20% 70% by weight. The charge, which consists of iron ore, coke and limestone etc. Application of blast furnace slag sand in cement concretea. The aim of this study is to determine the strength of cement mortar, replacing fine aggregate with granulated blast furnace slag gbfs by various percentages such as. Portland blast furnace cement simply called slag cement refers to the hydraulic binding material ground by mixing portland cement clinker, granular blast furnace slag, and appropriate amount of gypsum, codenamed p s. The report discusses acbfs aggregate production and properties, and the properties of concrete produced with acbfs coarse aggregate. Because the root blastfurnace slag material would otherwise. Clinker and cement production capacity of adana cement. Investigating the local granulated blast furnace slag. Blastfurnace cement definition of blastfurnace cement by. Minnesota department of transportation certified cement.
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