The SAI of the materials was determined and the results are presented in Table 3. the ratio of the compressive strength of a mortar cube made with equal amounts of slag and portland cement to the compressive strength of … Slag cement (Ground granulated blast- furnace slag): A hydraulic cement formed when granulated blast-furnace slag is ground to a suitable fineness. ... 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. It is used as a cementitious material in Portland cement concrete. Like fly ash, slag cement will generally enhance the workability of concrete. Slag cement usually decreases water demand between 1% and 10%, depending on dosage. Copper slag presented a potential application in mortars and concretes. 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. The results show that the activity index of the composite mineral admixture with higher GGBS content is larger, and this phenomenon is more obvious at later ages. Grade 100 must obtain an SAI of more than 70% at 7 days and 90% at 28 days. 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. 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. 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. To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Slag is a byproduct of steel production and is similar in character to volcanic rocks such as basalt and granite. De Activity Tracker is een horloge met heel veel slimme functies. This paper describes how ground granulated blast furnace slag (GGBFS), a by-product of the steel manufacturing industry, is being used as an effective partial cement replacement material, and it has already been proven to improve several performance characteristics of concrete. Slags are classified into three grades (80, 100, and 120) based on their respective mortar strengths when blended with an equal mass of portland cement (ASTM C989). 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. The ASTM C989 slag-activity index is often used as a basic criterion for evaluating the relative cementitious potential of slag cements. 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. ASTM C 1073 covers a rapid determination of hydraulic activity of 59 Als je bij Ictivity komt werken ga je aan de slag bij een innovatieve IT dienstverlener.We werken vanuit onze kantoren in Eindhoven en Vianen. The results show that the activity index of the composite mineral admixture with higher GGBS content is larger, and this phenomenon is … Screper2 Slag Activity Index Clause 6 Table 2 Vibration machine with timer & cube mould fitting assembly 12000 ± 400 vibration per min. As a measure of activity, we have used an index describing the average deviation of the horizontal field component from its normal value. High-alkalinity steel slag shows certain cementitious properties and should be given priority to be used as a supplementary cementitious material in concrete, based on economical and environmental considerations. The slag shall contain no additions and shall conform to the sulfide sulfur and sulfate chemical composition requirement. The activity index of steel slag-GGBS composite mineral admixture with different steel slag contents at the W/B of 0.3, 0.4, and 0.5 was investigated. 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. Compressive strength of concrete containing slag. Ground Granulated Blast Furnace Slag (GGBFS) is a by product of the steel industry. 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. Slag is a byproduct of steel production and is similar in character to volcanic rocks such as basalt and granite. Slag-activity Index. 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. The tests also included the evaluation of SC setting time and slag activity index. Specifications and Grade of Ground Granulated Iron Blast-Furnace Slags ASTM C 989 (AASHTO M 302) Grade 80 Slag with a low activity index Grade 100 Slag with a moderate activity index Grade 120 Slag with a high activity index 7. This login area is for SCA members only and is used to disseminate association meeting and activity information to members. Slag is primarily used in the cement and construction industries, and largely in road construction. GGBFSis divided into three classifications based on its activity index. 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 activity index (AI = (SiO 2 + Al 2 O 3 )/ (FeO + Fe 2 O 3 + MgO + MnO)) was defined to evaluate the hydration activity of steel slag, which was verified to be effective by the results of examples. 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. Pozzolanic activity may be directly determined by measuring the amount of reacted lime, using the technique of thermogravimetry analysis and differential thermal analysis (DTA). 325) sieve shall not exceed 20 percent. Grade80 has a low activity index and is used primarily in mass structures becauseit generates less heat than portland cement. similar. 3) - the waste product of the steel making process. Grade 120 has a high activity index and is more cementitious than OPC. In totaal met ruim 160 medewerkers. 1) - to spit. The slag activity index (SAI) of mortar using GGBF slag to replace PC at a rate of 50% by weight of the binder will not be less than 75% of the strength of the PC mortar at 28 days for grade 80. 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. GGBFS is produced when molten slag is quenched rapidly using water jets, which produces a granular glassy aggregate. classifications based on a slag activity index (SAI) – 120, 100, 80 • This is the ratio of a slag cement mortar to a reference cement mortar • Residue on the 45 micron screen is limited to 20% • Air content of a slag mortar is limited to 12% • Sulfide Sulfur < 2.5% • Sulfate < … SCA Board Member Login SCA Technical Marketing Committee Login Air-cooled slag has a rough finish and larger surface area when compared to aggregates of that volume which allows it to bind well with portland cements as well as asphalt mixtures. Slag Activity Index Min., percent Average of Last 5 related to iron and steel slag products. Request. The activity index is expressed as a percentage of the strength of the control sample. 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 … Currently, most steel slag is used as aggregate for concrete, asphaltic paving and road bases. Compressive Strength machine Poking Rod , Petroleum Jelly Planetary mixer Jolting apparatus Scraper and demoulding device Proving ring with all accessories suitable for calibration of CST machine The compressive strength of the mortar was determined according to ASTM C109 . Effect of the dosage of high-calcium fly ash and fineness of phosphorous slag powders on activity index of phosphorous slag powders was explored. 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) This paper presents the experimental results of the fineness effect on the pozzolanic activity of Cu-Ni slag in cemented tailing backfill. The activity index of steel slag-GGBS composite mineral admixture with different steel slag contents at the W/B of 0.3, 0.4, and 0.5 was investigated. The higher the activity index, the higher the hydration activity of the steel slag. Granulated blast furnace slag (GBFS) is a by-product of ironmaking and widely used in the cement and concrete. 2) - a woman whom sleeps around, looks cheap &/or has questionable character. 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). 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. 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. The hydration samples of phosphorous slag powders with high-calcium fly ash content were analyzed using XRD, DSC-TG and SEM. The slag shall contain no additions and shall conform to the sulfide sulfur and sulfate chemical composition requirement. The thermal behavior of the original clay is presented by DTA analysis as shown Fig. 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. ICE Virtual Library essential engineering knowledge. The higher the activity index, the higher the hydration activity of the steel slag. Calcium silicate slag, Activity index, Storage time, Particle size distribution Abstract. In Australia slag is standardised in AS 3582.2:2016. Update/Correction/Removal ” [1] In the production of iron, blast furnaces are loaded with iron ore, fluxing agents, and coke. Slags are classified into three grades (80, 100, and 120) based on their respective mortar strengths when blended with an equal mass of portland cement (ASTM C989). Steel slag is a potential mineral admixture for cement or concrete production (Shi, 2004). This figure tells the geomagnetic activity as observed from Tromsø (in the auroral zone) during the last 33 days. The hydration activity index of GGBS wi … 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. Mechanical test and microstructural analyses are performed. Slag activity index: 100%. 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. Typically the air-cooled slags have a slag activity index by ASTM C989 of 40 to 50 at 7 days, and 50 to 60 at 28 days and are thus considered low grade slags not even meeting grade 80 of ASTM C989. Compressive Strength machine Poking Rod , Petroleum Jelly Proving ring with all accessories suitable for calibration of CST machine Tachometer Cube Moulds 70.6 × … In this study, slag cement (SC) is used to prepare different slag cement mortar (SCM) mixes to study mortar microstructure perspectives, physiochemical properties, mechanical properties and durability performance. 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. The difference of activity among different types of high-alkalinity steel slag cannot be further distinguished by alkalinity. Kortom: met de Activity Tracker blijf je fit en altijd op de hoogte van je laatste berichten. Cement paste and cemented tailing backfill samples that without or contain Cu-Ni slag with various grinding times were made and cured at 20°C for 7, 28, and 150 days. From a metallurgical standpoint, slag can be sorted as either basic or acidic, and the more basic of slag, the greater its hydraulic activity in the presence of alkaline activators, Lea also reported that the hydraulic values of slag increase with the increasing CaO/SiO 2 ratio up to a limiting value (not precisely stated). Naast de gebruikelijke puzzelwoorden kom je tijdens je zoekopdrachten duizenden weetjes tegen. The slag activity index (SAI) of mortar using GGBF slag to replace PC at a rate of 50% by weight of the binder will not be less than 75% of the strength of the PC mortar at 28 days for grade 80. For grade 120, SAI shall be less than 90% at 7 days and 110% at 28 days. Type C Fly Ash: 33.5. read more... Total Construction Material & Solutions. 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