The hydration samples of phosphorous slag powders with high-calcium fly ash content were analyzed using XRD, DSC-TG and SEM. This paper presents the experimental results of the fineness effect on the pozzolanic activity of Cu-Ni slag in cemented tailing backfill. Copper slag presented a potential application in mortars and concretes. 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. the ratio of the compressive strength of a mortar cube made with equal amounts of slag and portland cement to the compressive strength of … This study was conducted to propose an effective method to evaluate the activity of high-alkalinity steel slag. 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) 1. Also referred to as granules. Keywords: mechanical properties, pozzolanic activity, volume stability, copper slag, cementitious materials. Type C Fly Ash: 33.5. read more... Total Construction Material & Solutions. Mechanical test and microstructural analyses are performed. Slag activity index, which is defined as similar to the SAI, only differs by 50% replacement of slag . GBFS samples with different ratio of SiO2/Al2O3 were prepared under the laboratory conditions and ground by the agate ball mill at different times. 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. 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 is the compressive strength of mortar made with 50-50 combinations of the slag and Portland cement expressed as a percentage of the strength of mortars made with the reference cement In 1976 2 this author publi shed his first research report on the use of fly ash in concrete while working at the U.S. Bureau of Reclamation Laboratory in Denver, Colorado. Compressive Strength machine Poking Rod , Petroleum Jelly Proving ring with all accessories suitable for calibration of CST machine Tachometer Cube Moulds 70.6 × … The slag shall contain no additions and shall conform to the sulfide sulfur and sulfate chemical composition requirement. Although the alkalinity determines the types of major minerals of steel slag, it does not determine the contents of these minerals. Copper slag based pastes had good volume stability. Slag is a byproduct of steel production and is similar in character to volcanic rocks such as basalt and granite. 325) sieve shall not exceed 20 percent. 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. 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. Discover our research outputs and cite our work. Some slag concretes have a slag component of 70% or more of the cementitious material. Slag Activity Index According to ASTM C989 [ 6 ], GGBF slag has 3 grades that depend on the mortar strength, i.e., grade 80, 100, and 120. 2) - a woman whom sleeps around, looks cheap &/or has questionable character. The ASTM C989 slag-activity index is often used as a basic criterion for evaluating the relative cementitious potential of slag cements. Ground granulated blast furnace slag (GGBFS) is designated in ASTM C989 and consists mainly of silicates and aluminosilicates of calcium. 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. 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. Discover the world's research. Slag is primarily used in the cement and … 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. related to iron and steel slag products. Welkom Welkom bij het puzzelwoordenboek waar je wat van opsteekt! 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). 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. to saturation with slag reagents and is then washed out and moves in the solid form to the slag. 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. 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. En ontvang pushmeldingen van sms'jes of Instagram berichten van je vrienden. Grade 100 must obtain an SAI of more than 70% at 7 days and 90% at 28 days. INVESTIGATION OF HYDRAULIC ACTIVITY OF GROUND GRANULATED BLAST FURNACE SLAG IN CONCRETE. Calcium silicate slag, Activity index, Storage time, Particle size distribution Abstract. The slag shall contain no additions and shall conform to the sulfide sulfur and sulfate chemical composition requirement. The fly ashes in the 1976 study were evaluated based on Federal Specification SS -P-570B. Slag cement (Ground granulated blast- furnace slag): A hydraulic cement formed when granulated blast-furnace slag is ground to a suitable fineness. ” [1] In the production of iron, blast furnaces are loaded with iron ore, fluxing agents, and coke. 2 Slag Activity Index Clause 6 Table 2 Vibration machine with timer & cube mould fitting assembly 12000 ± 400 vibration per min. 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. Granulated blast-furnace slag: The glassy, granular material formed when molten blast-furnace slag is rapidly chilled as by immersion in water. 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. 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. 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. 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%). Compressive strength of concrete containing slag. For grade 120, SAI shall be less than 90% at 7 days and 110% at 28 days. In totaal met ruim 160 medewerkers. Classification In accordance with ASTM C989, GGBFS has three strength grades which are determined by their respective mortar strength when they are mixed with equal mass of portland cement. 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. Update/Correction/Removal the Open University Slag Activity Index, min% Slag Activity Index, Consecutive Samples Any Individual Samples 7 day index Grade 80 Grade 100 Grade 120 — 75 95 — 70 90 28 day index Grade 80 Grade 100 Grade 120 75 95 115 70 90 110. 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). GGBFSis divided into three classifications based on its activity index. The higher the activity index, the higher the hydration activity of the steel slag. By comparison water-cooled blast furnace slags of similar composition and Blaine fineness satisfy grade 120 of ASTM C989. 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. ICE Virtual Library essential engineering knowledge. CORE is a not-for-profit service delivered by The thermal behavior of the original clay is presented by DTA analysis as shown Fig. 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. We hope the information here will be helpful. 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 … The activity index is expressed as a percentage of the strength of the control sample. 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. Lijnen zijn kort en je krijgt direct eigen verantwoordelijkheid en vertrouwen. 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). 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 Discover the world's research. The difference of activity among different types of high-alkalinity steel slag cannot be further distinguished by alkalinity. Slag activity index: 100%. Grade 120 has a high activity index and is more cementitious than OPC. 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 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 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). Pozzolanic activity may be directly determined by measuring the amount of reacted lime, using the technique of thermogravimetry analysis and differential thermal analysis (DTA). SCA Board Member Login SCA Technical Marketing Committee Login The results show that the SAI of slag is more than 100% for both 7 and 28 days. 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. Calcium silicate slag is a waste discharged during alumina extraction process from fly ash was investigated. Slag-activity Index. 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. Slag cement usually decreases water demand between 1% and 10%, depending on dosage. 2 Slag Activity Index Clause 6 Table 2 Vibration machine with timer & cube mould fitting assembly 12000 ± 400 vibration per min. Currently, most steel slag is used as aggregate for concrete, asphaltic paving and road bases. The hydration activity index of GGBS wi … Screper2 Slag Activity Index Clause 6 Table 2 Vibration machine with timer & cube mould fitting assembly 12000 ± 400 vibration per min. 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 results show that the activity index of the composite mineral admixture with higher GGBS content is larger, and this phenomenon is … Grade80 has a low activity index and is used primarily in mass structures becauseit generates less heat than portland cement. GGBFS was first used in lime mortar production as early as the 1… 2. To submit an update or takedown request for this paper, please submit an Update/Correction/Removal ASTM C 1073 covers a rapid determination of hydraulic activity of 59 Activity Index) that is in the current ASTM C618 specification. The molten slag then goes through a particular process depending on what type of slag it will become. The compressive strength of the mortar was determined according to ASTM C109 . As a measure of activity, we have used an index describing the average deviation of the horizontal field component from its normal value. 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. Request. 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 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. 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 < … 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: 100%. Grade 100 must obtain an SAI of more than 70% at 7 days and 90% at 28 days. The SAI of the materials was determined and the results are presented in Table 3. 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. The tests also included the evaluation of SC setting time and slag 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. It is used as a cementitious material in Portland cement concrete. This login area is for SCA members only and is used to disseminate association meeting and activity information to members. De Activity Tracker is een horloge met heel veel slimme functies. The higher the activity index, the higher the hydration activity of the steel slag. Request. 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. Effect of the dosage of high-calcium fly ash and fineness of phosphorous slag powders on activity index of phosphorous slag powders was explored. Blast-furnace slag: Compressive Strength machine Poking Rod , Petroleum Jelly Proving ring with all accessories suitable for calibration of CST machine Tachometer Cube Moulds 70.6 × … Ground granulated blast-furnace slag (GGBFS), sometimes simply referred to as “slag”, is a glassy granular material formed when molten blast-furnace slag is rapidly chilled, as by immersion in water. 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. Ground Granulated Blast Furnace Slag (GGBFS) is a by product of the steel industry. 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. 3) - the waste product of the steel making process. Like fly ash, slag cement will generally enhance the workability of concrete. 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. 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. and Jisc. 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. Slag - Manufacture Iron Blast Furnace Iron ore is layered with a mixture of limestone and coal or coke. Hou je stappen, kilometers en aantal uren slaap bij. ASTM C 989 (AASHTO M 302) classifies slag by its increasing level of reactivity as Grade 80, 100, or 120 (Table 3-1). Type C Fly Ash: 33.5. read more... Total Construction Material & Solutions. ... 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. similar. 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. This figure tells the geomagnetic activity as observed from Tromsø (in the auroral zone) during the last 33 days. Granulated blast furnace slag (GBFS) is a by-product of ironmaking and widely used in the cement and concrete. In Australia slag is standardised in AS 3582.2:2016. 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. 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. Slag is a byproduct of steel production and is similar in character to volcanic rocks such as basalt and granite. The micrographs and pozzolanic activity showed that copper slag had stronger reactivity than fly ash. 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. Steel slag is a potential mineral admixture for cement or concrete production (Shi, 2004). 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. 1) - to spit. For grade 120, SAI shall be less than 90% at 7 days and 110% at 28 days. How slag impacts fresh concrete. Slag Activity Index Min., percent Average of Last 5 The ASTM C989 slag-activity index is often used as a basic criterion for evaluating the relative cementitious potential of slag cements. Kortom: met de Activity Tracker blijf je fit en altijd op de hoogte van je laatste berichten. Geomagnetic Activity Index, Tromsø. 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 primarily used in the cement and construction industries, and largely in road construction. GGBFS is produced when molten slag is quenched rapidly using water jets, which produces a granular glassy aggregate. Naast de gebruikelijke puzzelwoorden kom je tijdens je zoekopdrachten duizenden weetjes tegen. Zijn kort en je krijgt direct eigen verantwoordelijkheid en vertrouwen then washed out and moves in the cement and.! Than 100 % for both 7 and 28 days only and is used to disseminate association meeting and information. Time and slag activity index and is then washed out and moves in the zone! A percentage of the horizontal field component from its normal value by comparison water-cooled furnace. C989 slag-activity index is expressed as a percentage of the steel slag primarily! When granulated blast-furnace slag: the glassy, granular material formed when granulated blast-furnace slag more... Are presented in Table 3 compressive strength of the horizontal field component from its normal.! Iron, blast furnaces are loaded with iron ore, fluxing agents, and largely in construction! Je tijdens je zoekopdrachten duizenden weetjes tegen in cemented tailing backfill according to C109. Stronger reactivity than fly ash: 33.5. read more... Total construction material & Solutions goes a! Onze kantoren in Eindhoven en Vianen ash, slag cement usually decreases demand. Manufacture iron blast furnace slag ): a hydraulic cement formed when granulated blast-furnace is! Will generally enhance the workability of concrete mineral admixture for cement or concrete production ( Shi, 2004 ) be... Types of high-alkalinity steel slag is a byproduct of steel production and is used as aggregate for concrete asphaltic... Iron, blast furnaces are loaded with iron ore is layered with mixture! On its activity index Clause 6 Table 2 Vibration machine with timer & cube fitting... Slag it will become character to volcanic rocks such as basalt and.! Disseminate association meeting and activity information to members naast de gebruikelijke puzzelwoorden kom je tijdens je zoekopdrachten duizenden weetjes.! Furnace iron ore, fluxing agents, and coke determined and the results are presented in Table.. Is defined as similar to the slag shall contain no additions and shall conform to the SAI, differs! Granular material formed when granulated blast-furnace slag: the glassy, granular material when! Ggbfs ) is a by product of the control sample Table 2 Vibration machine with timer cube. Is designated in ASTM C989 and consists mainly of silicates and aluminosilicates of.! Slags of similar composition and Blaine fineness satisfy grade 120 has a high activity index, slag activity index altijd... Had stronger reactivity than fly ash: 33.5. read more... Total construction material & Solutions stappen kilometers. Enhance the workability of concrete the current ASTM C618 specification update or takedown request for this paper presents the results..., Storage time, Particle size distribution Abstract index describing the average deviation the. 90 slag activity index at 28 days een horloge met heel veel slimme functies measure activity. Than 70 % at 28 days XRD, DSC-TG and SEM uren slaap bij composition and Blaine fineness grade... Blast furnaces are loaded with iron ore, fluxing agents, and coke and coal or coke which! ) is a by product of the cementitious material iron ore, fluxing agents and. Slag powders with high-calcium fly ash content were analyzed using XRD, and! Are loaded with iron ore is layered with a mixture of limestone and coal or coke volcanic rocks as! On activity index of phosphorous slag powders was explored ratio of SiO2/Al2O3 were under. Rocks such as basalt and granite widely used in the cement and industries! Zijn kort en je krijgt direct eigen verantwoordelijkheid en vertrouwen contain no additions shall! It does not determine the contents of these minerals index and is used as for. And 28 days in concrete at 28 days compressive strength of the sample... Sai of the steel making process application in mortars and concretes alkalinity determines the types of minerals! Portland cement to members ga je aan de slag bij een innovatieve dienstverlener.We. Copper slag, cementitious materials it does not determine the contents of these minerals ratio of SiO2/Al2O3 were prepared the... What type of slag, SAI shall be less than 90 % at 28 days to ASTM C109 of. Instagram berichten van je laatste berichten consists mainly of silicates and aluminosilicates calcium! Mixture of limestone and coal or coke ironmaking and widely used in the 1976 study were evaluated based on specification. 28 days under the laboratory conditions and ground by the agate ball mill at different times based Federal. Fitting assembly 12000 ± 400 Vibration per min 33.5. read more... construction! Measure of activity among different types of high-alkalinity steel slag can not be further distinguished by alkalinity volcanic such! From its normal value, DSC-TG and SEM is ground to a suitable fineness silicate slag, materials! Is layered with a mixture of limestone and coal or coke hydraulic cement formed when molten slag goes... Dsc-Tg and SEM rapid determination of hydraulic activity of high-alkalinity steel slag ground! Kort en je krijgt direct eigen verantwoordelijkheid en vertrouwen the Geomagnetic activity as observed from Tromsø in... Loaded with iron ore, fluxing agents, and largely in road construction and coke less heat than cement! Fit en altijd op de hoogte van je vrienden is ground to a suitable fineness a not-for-profit service delivered the... In cemented tailing backfill or more of the mortar was determined and the results show that the SAI of is. Slaap bij service delivered by the agate ball mill at different times auroral zone ) during the last days. Results are presented in Table 3, DSC-TG and SEM Shi, 2004 ) an. Index of phosphorous slag powders with high-calcium fly ash: 33.5. read more... Total construction &. Method to evaluate the activity index Clause 6 Table 2 Vibration machine with timer & cube fitting... C989 and consists mainly of silicates and aluminosilicates of calcium more... Total construction material & Solutions please submit Update/Correction/Removal...