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This ferrite-rich cement is another option to use steel slag as a raw material for cement clinker production. High levels of Fe content in steel slag increase the size of C 3 S crystals, decreasing the compressive strength of cement pastes [111]. However, …
The slump value decreased from 180 mm to 60 mm with steel slag usage and concrete density increased by 10.2%. With the increment in the applied load, the …
Mixing 30 carbonated steel slag powder with P 42.5 % % ·I at 7 days and 47.5MPa at 28 days, along with a flexural strength of 6.2MPa at 7 days and 8.0MPa at …
DOI: 10.1016/j.hbrcj.2017.11.001 Corpus ID: 139218810; Utilization of by-pass cement kiln dust and air-cooled blast-furnace steel slag in the production of some "green" cement products
The cement industry is facing numerous challenges in the 21st century due to depleting natural fuel resources, shortage of raw materials, exponentially increasing cement demand and climate linked environmental concerns. Every tonne of ordinary Portland cement (OPC) produced releases an equivalent amount of carbon dioxide to …
Three methods have been widely employed to improve the reactivity of steel slag and concurrently reduce its potential harm on cement-based host materials: (i) physical excitation, which stimulates the hydration activity by physically grinding steel slag into finer powder (Liu et al., 2016), (ii) chemical excitation, which adds chemical …
carbonation mechanism of steel slag within cementitious systemsatlowerCO 2 concentrations,providingafoundation for the further application of steel slag carbonation. 2. Materials and Methods 2.1. Steel Slag Used in the Study. The steel slag used in this study is layer-poured steel slag from Hebei, China, and its
India: JSW Cement has appointed Finland-based Coolbrook to install its RotoDynamic Heater electric kiln technology at the Vijayagar steel works and slag and cement grinding plant in Karnataka. Press Trust of India News has reported that the partners expect the technology to reduce the CO 2 emissions of the plant's slag …
LCA study of this material shows that the complex environmental index of the alkali activated slag cement based ecomaterial is 2.9337×10-12 year/ton, which takes only 19.8% of that for Portland ...
As a high-calcium and high-iron slag, steel slag can be recycled in the cement industry as iron corrective raw material and active admixture for cement (Shi, 2005, Tsakiridis et al., 2008), or used as aggregate for cement base materials (Shen et al., 2009).However, due to its poor soundness (Bodor et al., 2016, Le et al., 2017), …
the NOx emission in cement kilns, nickel slag was used to prepare the non-ammonia denitrification material, and a denitrification mechanism was proposed in this study. The results showed that the
2.1. Steel Slag Used in the Study. The steel slag used in this study is layer-poured steel slag from Hebei, China, and its chemical composition is presented in Table 2. Steel slag comprises several primary chemical components, with a significant mass fraction, including 37.8% CaO, 29.2% Fe 2 O 3, 11.6% SiO 2, 10.1% MgO, 5.9% Al 2 O …
Seven different scenaria were developed for the production of 1 ton of clinker in a rotary cement kiln. Each of these scenaria includes the use of alternative fuels such as RDF (Refuse derived fuel), TDF (Tire derived fuel) and BS (Biological sludge) or a mixture of them, in partial replacement of conventional fuels such as coal and pet coke.
Coal is still the most widely used primary fuel for cement kilns but natural gas, oil, and petroleum cokes are also fired in many countries. Secondary or alternative fuels such as scrap tyres, hazardous waste-derived fuels, plastics and various biomass fuels have been cofired with coal in cement kilns for many years. This lowers the production ...
Slag cement, a byproduct of steel-making, enhances the traditional concrete benefits of strength and durability while offering reductions in waste, energy use and greenhouse gas emissions. Slag cement is used in concrete for virtually any construction application, either in conjunction with traditional portland cement, part of blended cement or ...
DOI: 10.3389/sjss.2024.12908 Corpus ID: 269346848; Accelerated Carbonation of Steel Slag and Their Valorisation in Cement Products: A Review @article{Biava2024AcceleratedCO, title={Accelerated Carbonation of Steel Slag and Their Valorisation in Cement Products: A Review}, author={Giada Biava and Laura Eleonora …
Cement kiln dust can be used in cement bricks, concrete, or mortar as cementitious materials, and steel slag can serve various purposes, depending on its pozzolanic and hydration activity and f-CaO/MgO ratio, such as a supplementary cementitious material (SCM), pure binder material with the addition of carbonation …
The fuels and raw materials used in cement kilns can be the source of hazardous air pollutants other than particulate matter, ... Blast-furnace slag. By-product of iron-making and steel-making ...
Cement production contributes significantly to anthropogenic greenhouse gas emissions (GHG), a major contributor to global carbon emissions. The environmental impacts of cement production have grown in recent years and it is urgent to reduce its carbon footprint. Systems dynamics (SD) is a simulation method used to understand the …
Use of steel Slag as coarse and fine aggregate in concrete was presented. ... Modern cement, named Portland cement, was discovered in 1824 by using kiln-dried milled limestone and clay. Joseph Monier made the first concrete flowerpots of the world in 1867 by using wireframe and cement-based mortar [2]. Owing to this discovery, the …
Concrete is made up of cement, rock, sand, admixtures, and water. Cement is the binder that holds the solids together and makes concrete rock-hard after it cures. However, the cement in the mix is the carbon-producing culprit. To manufacture cement, limestone and other minerals are placed in gas-fired kilns that heat up to 2,000-3,000 …
Clinkers from slag-based raw mixes are different in terms of the number of alite growths. The strength of cements was defined in small samples from cement paste (1:0) with water-cement ratio of 0.28. The results given in Table 3 show that the use of slags in raw materials instead of clay positively affects the activity of clinkers. The …
Approximately 130 facilities across the United States generate EAF slag. EAF slag is used as an alternative to rock fragments, both in encapsulated uses (e.g., contained in concrete) and unencapsulated uses (e.g., loose ground cover material). It is commonly used as road base material. In some states, EAF slag is also marketed for …
Utilization of by-pass cement kiln dust and air-cooled blast-furnace steel slag in the production of some ''green" cement products Nour T. Abdel-Ghania, Hamdy A. El ...
Utilization of by-pass cement kiln dust and air-cooled blast-furnace steel slag in the production of some ''green" cement products Nour T. Abdel-Ghania, Hamdy A. El ... The blast-furnace steel slag is generated extensively as a by- product in the manufacture of pig iron during the smelting of the iron ore. It results from the combina- ...
How is Portland Slag Cement Made? The manufacturing process of Portland Slag Cement (PSC) involves the following steps: Obtaining Granulated Blast Furnace Slag: Granulated blast furnace slag is obtained as a by-product in the iron and steel industry.During the production of iron, blast furnaces produce molten slag, which is then quenched rapidly …
Chompoorat et al. [Citation 22] examined alkali-activated cement-based controlled low-strength materials, demonstrating that mixtures containing 10–30% steel slag and fly ash improved the strength and resilience modulus, making them ideal for pavement applications.
Cement kiln dust can be used in cement bricks, concrete, or mortar as cementitious materials, and steel slag can serve various purposes, depending on its …
Cement kiln dust can be used in cement bricks, concrete, or mortar as cementitious materials [25], and steel slag can serve various purposes, depending on its pozzolanic and hydration activity and ...
Three methods have been widely employed to improve the reactivity of steel slag and concurrently reduce its potential harm on cement-based host materials: (i) …
The requirements and service conditions of the refractories used to line rotary kilns in the cement industry are examined and possible ways of using them more efficiently are discussed. ... The strength of the steel of the shell at 450°C is several times lower than its strength at 20°C. ... The presence of a slag crust (rendering) helps ...
To further explore the performance of carbonated steel slag powder as an admixture, samples such as T1–T5, W0–W5, and H1–H4 were used to create mortar …
Steel slag, the most commonly discharged metallurgical slag from the steel industry, contains CaO, SiO 2, and Fe 2 O 3 in percentages that allow its use as a raw material in the cement industry. These oxides are essential for achieving optimal final product compositions and are also key components of the kiln feed.
DOI: 10.3389/sjss.2024.12908 Corpus ID: 269346848; Accelerated Carbonation of Steel Slag and Their Valorisation in Cement Products: A Review …