The results show that the SAI of slag is more than 100% for both 7 and 28 days. related to iron and steel slag products. Slag - Manufacture Iron Blast Furnace Iron ore is layered with a mixture of limestone and coal or coke. Pozzolanic activity may be directly determined by measuring the amount of reacted lime, using the technique of thermogravimetry analysis and differential thermal analysis (DTA). As a measure of activity, we have used an index describing the average deviation of the horizontal field component from its normal value. For grade 120, SAI shall be less than 90% at 7 days and 110% at 28 days. 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. 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. to saturation with slag reagents and is then washed out and moves in the solid form to the slag. Slag cement (Ground granulated blast- furnace slag): A hydraulic cement formed when granulated blast-furnace slag is ground to a suitable fineness. The higher the activity index, the higher the hydration activity of the steel slag. For grade 120, SAI shall be less than 90% at 7 days and 110% at 28 days. 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. 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. 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. GGBFS was first used in lime mortar production as early as the 1… This study was conducted to propose an effective method to evaluate the activity of high-alkalinity steel slag. 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. 2. 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 ASTM C989 slag-activity index is often used as a basic criterion for evaluating the relative cementitious potential of slag cements. 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 2 Slag Activity Index Clause 6 Table 2 Vibration machine with timer & cube mould fitting assembly 12000 ± 400 vibration per min. 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. In Australia slag is standardised in AS 3582.2:2016. 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%). 2) - a woman whom sleeps around, looks cheap &/or has questionable character. the Open University Slag activity index: 100%. The micrographs and pozzolanic activity showed that copper slag had stronger reactivity than fly ash. 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. Discover the world's research. Compressive Strength machine Poking Rod , Petroleum Jelly Proving ring with all accessories suitable for calibration of CST machine Tachometer Cube Moulds 70.6 × … The tests also included the evaluation of SC setting time and slag activity index. Request. The hydration activity index of GGBS wi … 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. 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. To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Discover our research outputs and cite our work. In totaal met ruim 160 medewerkers. Update/Correction/Removal Slag is primarily used in the cement and construction industries, and largely in road construction. GBFS samples with different ratio of SiO2/Al2O3 were prepared under the laboratory conditions and ground by the agate ball mill at different times. Mechanical test and microstructural analyses are performed. 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. Grade 100 must obtain an SAI of more than 70% at 7 days and 90% at 28 days. Kortom: met de Activity Tracker blijf je fit en altijd op de hoogte van je laatste berichten. ” [1] In the production of iron, blast furnaces are loaded with iron ore, fluxing agents, and coke. INVESTIGATION OF HYDRAULIC ACTIVITY OF GROUND GRANULATED BLAST FURNACE SLAG IN CONCRETE. Naast de gebruikelijke puzzelwoorden kom je tijdens je zoekopdrachten duizenden weetjes tegen. The results show that the activity index of the composite mineral admixture with higher GGBS content is larger, and this phenomenon is … The dosage of high-calcium fly ash and fineness of phosphorous slag powders was explored used to disseminate association and... At 28 days is often used as aggregate for concrete, asphaltic and... To the slag shall contain no additions and shall conform to the slag shall contain no additions and shall to. Loaded with iron ore, fluxing agents, and coke depending on dosage were analyzed using XRD DSC-TG. 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