Adverse Effects Slag Cement
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- Adverse Effects Slag Cement
The substitution of more than 5% copper slag for portland cement does not seem to have a beneficial effect on concrete properties. This confirms a previous study [15] on the use of CBPD in concrete, where low CBPD contents (<5%) at 1ow water-to-binder ratios did not have an appreciable adverse effect on concrete strength. Higher CBPD ...
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Are there negative effects for this use? Compared to OPC, how the following are affected: 1. Fresh properties (workability and setting time) 2. Mechanical properties: Strength and Modulus …
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The effect of thermal load on Slag cement concrete output must be measured because of the crucial role of thermal resistance in concrete structure performance and operation. This work examines the ...
WhatsApp: +86 18221755073The study reveals that fine steel slag can be utilized for cement replacement up to 10% does not show any adverse effect of the early as well as latter strength. Beyond 10% cement replacement would affect the compressive strength achieved after 90 days of curing.
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Alkali-activated slag (AAS) cement is an environmentally friendly hydraulic binding material produced by activating blast furnace slag (by-products of steel production) with alkaline activators, and characterized by excellent mechanical properties, durability (like chloride penetration and carbonation resistance), and sustainability [[1], [2], [3], [4]].
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Composition and compressive strength of steel slag-cement-silica fume mix cured for 4 h at 175 °C Compound (%) Compressive Strength (MPa) Steel Slag Cement Silica Fume 80 50 0 0 33.33 50 65 0 50 50 80 33.33 25 20 20 0 50 20 33.33 …
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The cement industry accounts for nearly 7% of carbon dioxide (CO 2) emissions globally and is facing tremendous pressure to reduce the emission intensity.Supplementary cementitious materials (SCM) are a quick and effective lever to lower CO 2 emissions. The cement hydration process is a sensitive mechanism and is greatly influenced by many factors …
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In response to the aforementioned issues, some scholars have explored new methods to prepare CO 2-mixing mineralization concrete by directly incorporating CO 2 during the concrete mixing process. Monkman et al. [5], [16], [17] conducted a systematic study on the effect of CO 2 dosage on the properties of concrete. Research findings indicate that the use of a …
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Ordinary Portland cement (OPC) concrete has adverse impacts on the environment because of its production, the release of huge quantities of CO 2, and consuming a large amount of energy [].Moreover, its durability is also a significant drawback, especially in acidic environments [2,3].Thus, researchers have always been searching to compensate for OPC's …
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Steel slag, copper slag, lead-zinc slag, and electric furnace ferronickel slag are the most common metallurgical slags that could be used as supplementary cementitious materials (SCMs) and...
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A CEM I 52.5 N Portland cement complying with BS EN 197–1, with a particle density of 2.7–3.2 g/cm 3, supplied by Hanson Limited, UK, was used.The ground granulated blast furnace slag (GGBS), which is a low-carbon and environmentally-friendly cement substitute, used in this study was Regen GGBS with a particle density of around 2.9 g/cm 3, …
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This paper summarizes the adverse effects of steel slag, copper slag, lead-zinc slag, and electric furnace ferronickel slag in the application of cement-based materials, and the following conclusions can be drawn. Metallurgical slags can affect the fresh properties of mortar or …
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One such waste, which is generated in large quantities, is slag. However, slag from incineration plants may contain harmful elements that adversely affect the physical, …
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DOI: 10.1016/J.CONBUILDMAT.2021.123265 Corpus ID: 235513832; Steel slags in cement-based composites: An ultimate review on characterization, applications and performance @article{Martins2021SteelSI, title={Steel slags in cement-based composites: An ultimate review on characterization, applications and performance}, author={Ana Carolina …
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Lithium slag (LS), an industrial waste byproduct generated during lithium salt production, is characterized by its harmful trace elements, significant stockpiles and low pozzolanic activity. By 2003, the annual discharge of lithium slag in China surpassed 15 million tons, creating an urgent need for established large-scale disposal technologies. One of the …
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The article deals with adverse effects of using metallurgical slags in concrete. Despite a very long list of references, the article itself is rather sketchy.
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The effect of magnesia burnt at 800-950°C on the properties, especially the shrinkage, of alkali-activated slag cement (AASC) was experimentally studied. Experimental results show that, although adding 4%-8% lightly-burnt magnesia may shorten the setting time and slightly reduce the compressive strength of AASC, it can remarkably reduce the ...
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The results emphasized that even 7-day wet curing was inadequate for high levels of slag replacement, and that continued exposure to a drying environment can have adverse effects on the long-term durability of inadequately cured slag concrete.
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Concrete is a composite material composed of a binder (i.e., cement paste) and aggregates (i.e., sand, crushed stones, or gravel) [1].These raw materials are non-renewable resources, and their mining and production processes have an adverse impact on the environment [2 – 4].In recent years, owing to the impacts of climate change, significant attention has been devoted to …
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Concrete, which acts as the basic structural material, is frequently used in building projects. Concrete uses Portland cement as a binder and the huge production of cement results in carbon dioxide emissions. To reduce CO 2 emissions, a transition to alternate products is required. Our research examines the viability of substituting a portion of the cement in …
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Furnace Slag (GGBFS), Hydraulic Slag Cement, Lafarge Slag, Litex™ Lightweight Aggregate, Metallic Slag, NewCem®, Pelletized Slag, ... Ingestion may cause adverse effects. Chronic Symptoms: Long term exposure to respirable crystalline silica results in a significant risk of developing silicosis and other
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The research on the preparation of green building materials from solid waste is very extensive. Jiang (Jiang et al., 2022) et al. used waste glass powder to prepare green concrete, and the research shows that the waste glass powder is a feasible supplementary cementitious material (SCM), which can improve the physical and mechanical properties of the …
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The effects of constituents of fresh concrete, including cement, supplementary cementitious materials (fly ash, ground blast furnace slag, and silica fume), limestone powder, coarse and fine ...
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Moreover, the content of Al 2 O 3 also influences the sulfate resistance of slag concrete. The influence of MgO as a replacement of CaO seems depending on both the basicity and the MgO content of slag. Variations in the MgO content up to 8-10% may have little effect on strength development, but high content have an adverse effect.
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In terms of safety, there are issues with the soundness of steel slag, the alkali-silica reaction involving cement and electric furnace ferronickel slag, and the environmental …
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of OPC and slag concrete of cement slag mix ratio 85:15, 70:30 and 55:45 have been studied in ... Chloride ions may cause adverse effect on hardened concrete in variety of ways. It may attack concrete in also different forms. It is generally attributed to the formation of
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The compressive strength of 5 μm-20% and 3 μm-20% are still higher than that of cement. When steel slag dosage comes to 30%, only 3 μm-30% has a close compressive strength with cement. The raw steel slag could replace cement with only 10% dosage without adverse effect on the mechanical property.
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Particular attention is drawn to the adverse effects of poor early curing of slag cement concretes with respect to surface scaling of concrete. 2. Studies of site structures The quality and performance of concrete in large, site-stored blocks and in actual structures have been determined by testing drilled cores taken from a number of locations ...
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Steel slag, copper slag, lead-zinc slag, and electric furnace ferronickel slag are the most common metallurgical slags that could be used as supplementary cementitious materials (SCMs) and aggregates. However, they have some adverse effects that could significantly limit their applications when used in cement-based materials.
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Product List, Its non-toxic, non-corrosive, non-volatile, no adverse effects on cement, can apply to produce slag cement admixture, slag cement, low-heat cement, ... Go to Product Center. Slag Cement Association - Slag Cement Creates Concrete At Its ..., The SCA is an organization of companies who ship slag cement in the United States. ...
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The main aim of this study is to evaluate the sulfate resistance of the slag blended concrete under steam curing. Concrete samples prepared with varying replacement ratios of slag (0%, 20%, 50% and 70%) were subjected to steam curing and thereafter immersed in 5% Na 2 SO 4 solution over a period of up to 540 days. The macro performance of concrete was …
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with marble powder and copper slag individually. As we know Concrete is the largest material after food and water. The main constituents of concrete are Cement and Fine aggregate. Many studies have been done to know the environmental impact of cement and concrete. Seeking the adverse effect of high production of cement on environment, we have
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Effect of Slag Grade and Cement Source on the Properties of ..., crete mixtures containing slag cement, the effects of slag cement grade, and its interaction with various sources of cements. ... The study reported that up to 5% substitution of CKD by weight of cement had no adverse effect on ... of cement pastes containing granulated slag and ...
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The effect of unprocessed PG and FG was studied on the properties of portland cement and portland slag cement (PSC) with and without natural gypsum (NG). The NG was blended with by-product gypsum to reduce the adverse effect of impurities of P 2 O 5 and F present in this type of gypsum. The role of blended gypsum vis-a-vis by-product gypsum on ...
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This paper summarizes the adverse effects of steel slag, copper slag, lead-zinc slag, and electric furnace ferronickel slag in the application of cement-based materials, and the following conclusions can be drawn.
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