ASTM C 1073 covers a rapid determination of hydraulic activity of 59 The hydration samples of phosphorous slag powders with high-calcium fly ash content were analyzed using XRD, DSC-TG and SEM. Grade 100 must obtain an SAI of more than 70% at 7 days and 90% at 28 days. The pozzolanic activity is a measure for the degree of reaction over time or the reaction rate between a pozzolan and Ca 2+ or calcium hydroxide (Ca(OH) 2) in the presence of water.The rate of the pozzolanic reaction is dependent on the intrinsic characteristics of the pozzolan such as the specific surface area, the chemical composition and the active phase content. Since the test is performed with mortar, the results may not provide a direct correlation of how the fly ash or natural pozzolan will contribute to strength in concrete. 325) sieve shall not exceed 20 percent. To improve the properties of ground granulated blast furnace slag (GGBS) and utilize ground granulated blast furnace slag efficiently, this study investigates the effect of fineness on the hydration activity index (HAI) of ground granulated blast furnace slag. ” [1] In the production of iron, blast furnaces are loaded with iron ore, fluxing agents, and coke. Slag is primarily used in the cement and construction industries, and largely in road construction. This study was conducted to propose an effective method to evaluate the activity of high-alkalinity steel slag. Physical properties of the slag shall be in accordance with the requirements for fineness as determined by air permeability and air content, slag activity index, and compressive strength. Pozzolanic activity may be directly determined by measuring the amount of reacted lime, using the technique of thermogravimetry analysis and differential thermal analysis (DTA). Geomagnetic Activity Index, Tromsø. HI7 and HI28, thus obtained, have been mapped onto a Slag Activity Index (SAI) plot, giving an indication of the ranges of strength of slag. As a measure of activity, we have used an index describing the average deviation of the horizontal field component from its normal value. The research in the article indicate not only the possibility of dissolution of the ceramic material in the molten slag, but also possibility of erosive activity of the slag on that material. 102 Restrictions are placed on LOI (3.0%), insoluble residue (2.0%), sulfur (1.5%), MgO (15.0%), Al 2 O 3 (18.0%), FeO (1.5%) and MnO (2.0%). It is a non-metallic product, consisting of silicates and aluminosilicates of calcium and other bases, developed in a molten condition simultaneously with iron in a blast furnace. Slag activity index: 100%. Although the alkalinity determines the types of major minerals of steel slag, it does not determine the contents of these minerals. GBFS samples with different ratio of SiO2/Al2O3 were prepared under the laboratory conditions and ground by the agate ball mill at different times. The thermal behavior of the original clay is presented by DTA analysis as shown Fig. Request. Ground granulated blast furnace slag (GGBFS) is designated in ASTM C989 and consists mainly of silicates and aluminosilicates of calcium. 1) - to spit. ICE Virtual Library essential engineering knowledge. Hou je stappen, kilometers en aantal uren slaap bij. CORE is a not-for-profit service delivered by Ground Granulated Blast Furnace Slag (GGBFS) is a by product of the steel industry. Strength activity index test: According to (ASTM C989-99) Slag activity is evaluated by determining the compressive strength of both Portland- cement mortars and corresponding mortars made with the mass combinations of slag and Portland cement. SCA Board Member Login SCA Technical Marketing Committee Login The slag shall contain no additions and shall conform to the sulfide sulfur and sulfate chemical composition requirement. 2 Slag Activity Index Clause 6 Table 2 Vibration machine with timer & cube mould fitting assembly 12000 ± 400 vibration per min. Slag concrete compressive strength is mainly based on number of factors for instance slag type, finesses, activity index, and the amount employed in concrete mixtures in addition to other factors for example … Also referred to as granules. The three grades, 80, 100, and 120, are classified according to their slag activity index which is average compressive strength of the slag-reference cement cubes (SP), divided by the average compressive strength of the reference cement cubes (P), multiplied by 100 (see Table 1). Physical properties of the slag shall be in accordance with the requirements for fineness as determined by air permeability and air content, slag activity index, and compressive strength. Slag Activity Index Min., percent Average of Last 5 Consecutive Samples Any Individual Sample 7-Day index Grade 80 - - Grade 100 75 70 Grade 120 95 90 28-Day index Grade 80 75 70 Grade 100 95 90 Grade 120 115 110 For fineness, the amount retained when wet-screened on a 45 µm (No. Type C Fly Ash: 33.5. read more... Total Construction Material & Solutions. The activity index (AI = (SiO2 + Al2O3)/(FeO + Fe2O3 + MgO + MnO)) was defined to evaluate the hydration activity of steel slag, which was verified to be effective by the results of examples. to saturation with slag reagents and is then washed out and moves in the solid form to the slag. The results show that the SAI of slag is more than 100% for both 7 and 28 days. HOME > Association Activities The purpose of Nippon Slag Association is promoting a broad understanding of iron and steel slag products among consumer industries, governments, academic associations, and working for effective use of these products. Blast furnace slag is defined as “the non-metallic product consisting essentially of calcium silicates and other bases that is developed in a molten condition simultaneously with iron in a blast furnace. 4.1.1 Strength Activity Index— The test for strength activity index is used to determine whether fly ash or natural pozzolan results in an acceptable level of strength development when used with hydraulic cement in concrete. the Open University ... 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. Post-doctoral Researcher, Department of Civil Engineering, Tsinghua University, Beijing, People's Republic of China, Professor, Department of Civil Engineering, Tsinghua University, Beijing, People's Republic of China, PhD candidate, Department of Civil Engineering, Tsinghua University, Beijing, People's Republic of China, Copyright © ICE Publishing 2021, all rights reserved, Development, planning and urban engineering, Geology, geotechnical and ground engineering, Water engineering and wastewater management, https://doi.org/10.1680/macr.2011.63.10.737, Experimental blastfurnace cement incorporating high-magnesia slag, Magazine of Concrete Research, Volume 3, Issue 9, Investigation of the hydration of Portland blastfurnace slag cement: hydration kinetics, Advances in Cement Research, Volume 2, Issue 5, HEAVYWEIGHT CONCRETE WITH STEEL SLAG AGGREGATES. When the iron ore, which is made up of iron oxides, silica, and alumina, comes together with the fluxing agents, molten slag and iron are produced. Discover the world's research. SAI = slag-activity index, % SP = average compressive strength of slag-reference cement mortar cubes, psi P = average compressive strength of reference cement mortar cubes, psi Grades are determined when the mortar cube sample’s SAI falls within the allowed ranges of the following table. By comparison water-cooled blast furnace slags of similar composition and Blaine fineness satisfy grade 120 of ASTM C989. The physical properties of the slag have to be in accordance with the requirements for fineness as determined by air permeability and air content, slag activity index, and compressive strength. Slag cement usually decreases water demand between 1% and 10%, depending on dosage. Compressive strength of concrete containing slag. The hydration activity index of GGBS wi … Verbeter uw gezondheid met de Garmin Index Smart Scale, de verbonden weegschaal met meetfuncties om gewicht, Body Mass Index, lichaamsvet, spiermassa en meer te meten. Lijnen zijn kort en je krijgt direct eigen verantwoordelijkheid en vertrouwen. This login area is for SCA members only and is used to disseminate association meeting and activity information to members. Grade 100 must obtain an SAI of more than 70% at 7 days and 90% at 28 days. Keywords: mechanical properties, pozzolanic activity, volume stability, copper slag, cementitious materials. The ASTM C989 slag-activity index is often used as a basic criterion for evaluating the relative cementitious potential of slag cements. Some slag concretes have a slag component of 70% or more of the cementitious material. Like fly ash, slag cement will generally enhance the workability of concrete. related to iron and steel slag products. To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Copper slag presented a potential application in mortars and concretes. This paper presents the experimental results of the fineness effect on the pozzolanic activity of Cu-Ni slag in cemented tailing backfill. Welkom Welkom bij het puzzelwoordenboek waar je wat van opsteekt! The purpose of Nippon Slag Association is promoting a broad understanding of iron and steel slag products among consumer industries, governments, academic associations, and working for effective use of these products. Type C Fly Ash: 33.5. read more... Total Construction Material & Solutions. GGBFSis divided into three classifications based on its activity index. To improve the properties of ground granulated blast furnace slag (GGBS) and utilize ground granulated blast furnace slag efficiently, this study investigates the effect of fineness on the hydration activity index (HAI) of ground granulated blast furnace slag. We hope the information here will be helpful. Calcium silicate slag is a waste discharged during alumina extraction process from fly ash was investigated. 2 Slag Activity Index Clause 6 Table 2 Vibration machine with timer & cube mould fitting assembly 12000 ± 400 vibration per min. 1. In Australia slag is standardised in AS 3582.2:2016. Slag Activity Index Min., percent Average of Last 5 Grade80 has a low activity index and is used primarily in mass structures becauseit generates less heat than portland cement. 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