ejected from a blast furnace, the slag is molten at a temperature of approximately 1,500℃. Depending on the cooling method used, it is classified either as aircooled slag or granulated slag [17]. Aircooled slag The molten slag flows into a cooling yard, where it is cooled .
Its effectiveness as hydraulic material is examined before and after heat treatment in an induction furnace. The study shows that while there is a marginal reduction in the early age strength of the Portland Slag Cement mortar, the later age strength does not suffer by replacing up to 20% of Ground Granulated Blast Furnace Slag (GGBFS) by EAF slag.
Therefore in this study geopolymer concrete is manufactured by 100% replacement of cement content by ground granulated blast furnace slag and a combination of sodium silicate and sodium hydroxide is used as an alkaline solution. The results have shown that the compressive strengths increased with increasing curing time and type of alkali activators.
Several studies comprising of the use of GGBS in cement concrete and mortar has been carried out. The influence of incorporation of GGBS on fresh and hardened properties of concrete is represented in following sections. 2. Workability . The use of GGBS as partial and full replacement of cement in. cement mortar and concrete has significant
Key words: Ground Granulated Blast Furnace Slag, Cement Concrete, Compressive Strength I. INTRODUCTION The BlastFurnace slag is a byproduct of the iron manufacturing industry. Iron ore, coke and limestone are fed into the furnace and the resulting molten slag floats above the molten iron at a temperature of about 1500 0C to 1600 0C.
Dec 06, 2004· Electric Arc Furnace Slag in Concrete ... Studies and tests were performed on the durability of these concretes showing an acceptable behavior against aggressive environments. Finally, some leaching tests were carried out in order to verify their environmental compatibility. ... Substitution of Hydrated Lime by Ground Granulated Blast Furnace ...
Nov 10, 2019· Ground granulated blast furnace slag (GGBS) is a byproduct from the blastfurnaces used to make iron. furnaces are fed with a controlled mixture of ironore, coke and limestone, and operated at a temperature of about 1,500° granulated slag is further processed by drying and then grinding in a vertical roller mill of rotating ball mill to ...
The blast furnace slag can impart many desirable properties to the masonry units such as lighter weight and increased fire resistance. According to studies as far back as 1927 by Penn State University, Ohio State University, Department of Agriculture, Auburn University, and Canadian research, AgSlag applications have been equivalent to limestone and dolomite in increasing crop yields at equal levels .
Ground granulated blast furnace slag (GGBFS) is designated in ASTM C 989 and consists mainly of silicates and aluminosilicates of calcium. GGBFS is divided into three classifications based on its activity index. Grade 80 has a low activity index and is used primarily in mass structures because it generates less heat than portland cement.
What is slag cement or ground granulated blastfurnace slag (GGBFS) Q. A. Blastfurnace slag is the nonmetallic product consisting essentially of silicates and aluminosilicates of calcium and other bases that develop in a molten condition simultaneously with iron in a blast furnace.
chinese technology for blast furnace slag granulation process. Baosteel Slag Short Flow technology used for granulation of converter and electric arc furnace steel mill slag Joint marketing and Siemens already offers solutions for slag granulation from pig iron production in blast furnaces . Click to view; titanium slag plant technology china YouTube
Possible Uses of Steelmaking Slag in Agriculture: An Overview 337 Bessemer or Thomas processes, as phosphating and/or liming agent started in 1880 (Geiseler, 1996). Fig. 2. The scrapbased steelmaking. The traditional use of slag as landfill material, after the increase of steel production since the
without ground granulated blast furnace slag is 16% higher than that of specimens with 90% content. In order to reduce carbon emissions, it is feasible to add 70% ground granulated blast furnace slag (GGBS) in concrete mixtures [8]. Adding superfine ground granulated blast furnace slag can make
Slag cement is often referred to as "ground granulated blastfurnace slag" (GGBFS). As requested in 2001 by slag cement manufacturers and the Slag Cement Association, the American Concrete Institute officially reviewed and changed the terminology from GGBFS to slag cement (ACI Committee 233, 2004).
On its own, ground granulated blast furnace slag (GGBS) hardens very slowly and, for use in concrete, it needs to be activated by combining it with Portland cement. A typical combination is 50% GGBS with 50% Portland cement, [4]but percentages of GGBS anywhere between 20 .
The Slag Cement Association (SCA) represents companies that produce and ship over 90 percent of the slag cement (ground granulated blast furnace slag) in the History. Slag cement use can be traced to the 1700's when the material was combined with lime to .
In Iranian iron and steel plants, slags are generated at three different stages of processing; Basic Oxygen Furnace (BOF), Electrical Arc Furnace (EAF) and Granulated Blast Furnace (GBF) are the slags used in this study. In this respect, some mixtures were made with 10%, 20% and 30 wt% of each slag replaced in ordinary Portland cement.
Wang Ling, Tian Pei, and Yao Yan from China Building Materials Academy [2] introduce studies and the application of ground granulated blast furnace slag (GGBS) in China. GGBS concrete is characterized by high strength, lower heat of hydration, and resistance to chemical corrosion.
The study performed a relative evaluation of the mechanical properties of concrete containing electric arc furnace oxidizing slag, steelmaking slag, and granulated blast furnace (GBF) slag. The study showed that replacing cement with EAF oxidizing slag deferred the hydration reaction at early ages, without any significant troubles in setting time, strength or shrinkage development.
granulated blast furnace slag (GGBS) and Black Rice Husk Ash (BRHA). e geopolymer concrete was prepared with GGBS as the primary binder instead of cement and BRHA was replaced with GGBS at various proportions. Addition of BRHA signi cantly improves the durability with reduced sorptivity and chloride permeability when compared to the control concrete.
The major contributors to this increase being GBFS (Granulated Blast Furnace Slag) at 100%, BFS (Blast Furnace Slag) at 71%, BOS (Basic Oxygen Slag) at 64%,EAFS (Electric Arc Furnace Slag) at 54% and other slags at 24%. FIGURE 1 (Inside front cover) shows a simple multilevel pie .
furnace slag promote excellent bonding with cement mortar. Blast furnace slags can be used as aggregates although they are used increasingly as a cement admixture because this use has a higher value. Blast furnace slag is nonreactive in a high alkali environment, such as concrete and soils. Blast furnace slag concrete can be reliably pumped when the slag is supplied