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· were both replaced isometrically by steel slag The steel slag volume replacement level replacing basalt was varied as 0 20% 40% 60% 80% and 100% The chemical compositions of the steel slags are given in Tab 1 The appearance of steel slag is showed in Fig 1 366 JRM 2021
·The steel slag sample was initially milled into a powder form and then the representative sample was taken from the crushed material The sample was subsequently placed on a sieve with an appropriate mesh size that allows particles up to 63 μm in diameter to pass through while retaining larger particles The screened samples were then
·In order to realize the resourceful large scale and high value utilization of steel slag which is a bulk industrial solid waste and to reduce the use of cement based cementitious materials this study adopted the coupled excitation effect of sodium carbonate magnesium oxide desulfurization gypsum to excite steel slag based cementitious materials and it
·Steel slag is a by product of the steel production process accounting for approximately 15% of the whole crude steel output [1] The accumulation of untreated steel slag not only occupies a significant amount of land but also leads to the leaching of heavy metal ions such as vanadium chromium arsenic lead cadmium polluting surrounding water sources
·A continuous treatment process using steel slag powder including foam drying and carbonation processes termed the SSFD C method is a novel technology previously developed in our laboratory It has achieved the first application of steel slag carbonation technology to recycle dredged slurry with high moisture content The SSFD C method
·Steel slag a solid waste material that is a by product of the steelmaking industry After the wear test there is no change in the appearance of the particles in terms of their color and morphology After the particles are passed through a 100 mesh sieve only g of debris falls off indicating that more than % of the particles
·1 Introduction As a kind of solid waste steel slag is a residue obtained during the conversion of hot metal to crude steel which accounts for about 10 15% of crude steel production [1] In China the annual output of steel slag is more than 120 million tons [2] However the comprehensive utilization ratio of steel slag is less than 30% [3] The untreated steel slag
·Preparation of specimens and mix proportions The study utilized ordinary Portland cement in specific mixing proportions as shown in Table 3 to assess the mechanical strength durability and microstructural properties of cement total of 13 mixes of cement mortar are prepared using steel slag and PVC powder as a partial replacement for cement
·Olivine and steel slag additions increased total alkalinity by 29 and 361 µmol kg−1 respectively corresponding to a respective theoretical increase of % and % of the seawater storage capacity for atmospheric CO2 The sieved olivine and slag grains were inspected with respect to their appearance and elemental composition using
·1 Introduction Steel slag SS is a waste residue produced by steelmaking which produces more than 110 million tons each year in China but the effective utilization rate of SS is about 22% [1] The accumulation of SS is not only a waste of resources but also a pollution to the environment [2] [3] [4] Researches show that SS and Portland cement clinker have
T1 Influence of Alkali Metal Oxides in Secondary Metallurgical Slags on the Behavior and Appearance of Non Metallic Inclusions in Steel AU Preißer Nikolaus N1 no embargo The inclusion populations before and after steel slag interaction were compared using automated SEM/EDS analysis A clear impact of the alkali metal oxides on
World of Iron and Steel Slag Network International Glossary of Terms 2020 Launched at the National Slag Association 102 nd Annual Meeting KOBM slag is typically light to medium brown in colour with a physical appearance of coarse sand including fine size particles Based on its chemistry KOBM slag is pozzolanic with self cementing
·In each experiment g of steel slag was leached in 250 ml of N nitric acid solution which is in excess of the stoichiometric requirement of acid moles to leach the metal ions completely from the slag After 60 min of dissolution ml of N NaOH was dosed every 10 s into the slurry using an auto titrator Hanna HI901
3 ·The iron and steel industry is an energy intensive industry and a pillar industry of the national economy Steel slag SS is an alkaline solid waste generated during the steelmaking process [1] Each ton of crude steel produced generates tons of SS and emits tons of CO 2 [2 3] The iron and steel industry is not only one of the largest sources of industrial
·the steel slag utilization rate of steel slag is only % far below the rates in the USA % Europe % and Japan % [3] This is primarily reflected in the underutilization of steel slag in road construction and agriculture [4] Steel slag contains a large amount of free calcium oxides f CaO which reduces its volume
·Mechanical activation of steel slag to prepare supplementary cementitious materials A comparative research based on the particle size distribution hydration toxicity assessment and carbon dioxide emission Microparticles appearance The SEM images of steel slag under different grinding processes and times are displayed in Fig 7; they
4 ·In order to explore the potential wider application of steel slag as aggregate in road pavement this study starts with the examination of steel slag s appearance chemical composition properties and mechanical performance Gradually a thorough investigation of
·This study investigates the performance of two waste materials steel slag and construction and demolition waste CDW as potential backfill materials for reinforced earth RE applications under cyclic loading conditions Consolidated undrained cyclic triaxial tests were conducted on the materials to investigate the material behavior The study also assessed the
·The cm cm 2 cm rectangular steel slag block and basalt block were designed and manufactured for the interface tensile test The aggregate block and asphalt were made into aggregate asphalt aggregate specimens as shown in Fig 12 The maximum tensile strength of the steel slag asphalt steel slag specimen is Mpa
·The research progress of steel slag utilization is overviewed in the present paper 2 Physical and chemical characteristics of steel slag The density of steel slag lies between /cm 3 In appearance steel slag looks slag a loose collection and appears hard and wear resistant due do its high Fe content
·Steel slag s usage is related to its physico chemical characteristics The density of steel slag is g/cm 3 Steel slag is hard because of its high Fe amount and is highly resistant to corrosion The grindability index of steel slag is [38] Steel slag primarily consists of SiO 2 CaO Fe 2 O 3 FeO Al 2 O 3 MgO MnO and P 2 O 5
·steel slag has been applied in the submerged arc welding process The effects of recycled slag on the chemical composition Smooth surface appearance and desirable bead profile having deeper penetration were obtained It is interesting to note that the cost of recycled steel slag is economical by 62% in comparison with equivalent virgin
Carbon dioxide sequestration using steel slag—modeling and experimental investigation Smitha Gopinath Anurag Mehra in Carbon Dioxide Sequestration in Cementitious Construction Materials 2018 Introduction Steel slag is an industrial waste that is generated during the production of steel In the production of steel oxides of metal impurities in the iron combine
·Abstract The stacking of steel slag has detrimental effects mainly for the waste of resources and the pollution of environment In this study a novel method based on microbially induced calcium precipitation MICP was proposed by utilizing a type of microorganism named Bacillus mucilaginosus which could secrete carbonic anhydrase CA through the metabolism
