The substitution of the cement by slag provides two clear advantages; the first one is the use of a waste that must be managed in a landfill, and the second one, ... Thivya J. Effect of copper slag, iron slag and recycled concrete aggregate on the mechanical properties of concrete. Resour. Policy. 2017; 53:219–225. doi: ...
Request PDF | Recycling of slag and lead-bearing sludge in the cleaner production of alkali activated cement with high performance and microbial resistivity | The motivation behind this work is to ...
In this paper, steel slag powder was used to replace part of the cement in road concrete, and group tests were carried out on coarse aggregates with different water–cement (W/C) ratios, different steel slag parameters, and different particle sizes. A sample of 100 mm × 100 mm × 100 mm was prepared and cured for 3 days, 7 days, and …
NOTE: Calculations are based on: • The typical mix designs used by BRE for the calculations of 'Ecopoints' for concrete. • The data on embodied CO 2e of UK cement, additions and cementitious material, referenced below. • D Higgins, L Parrott & L Sear "Effects of ground granulated blastfurnace slag and pulverised-fuel ash upon the …
plants is also sold outside to cement plants. Slag application also reduces the overall cost of production of cement. JSPL has established Nandyal works, Andhra Pradesh & Vijaynagar works, Karnataka and Dolvi works, Maharashtra of 4.80 MTPA & 0.60 MTPA and 2.20 MTPA cement plant to produce portland slag cement (PSC) and Ground
Japan, a leader in steel slag recycling, produced 14.1 Mt. in 2016 with 98.4% utilization. China, the world's top steelmaker, disposes 70.5% of its slag of rather than being repurposed. ... that the type of SCM and its corresponding mode of transportation are essential aspects of the environmental impact of concrete. To aid decision-makers in ...
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Blast furnace slag is the main byproduct of the ironmaking process and is a mixture of various oxides,1 CaO (30–45%), SiO2 (28–38%), Al2O3 (8–24%), and MgO (3–18%). ... Determination of optimum blast furnace slag cooling rate for slag recycling in cement manufacture. Y. L. Qin Chongqing University of Science and …
Geopolymers are considered a sustainable substitute for Ordinary Portland Cement, but they do have an impact on the early age and long-term qualities of concrete, specifically its workability. This study evaluates the feasibility of developing sustainable self-compacted geopolymer concrete, using recycled concrete aggregates. The …
Concrete is the most used material on the planet, after water, and is responsible for approximately 7.5% of total anthropogenic CO 2 emissions 1,2,3.. The two main strategies deployed to date to ...
The Cambridge researchers found that used cement is an effective substitute for lime flux, which is used in steel recycling to remove impurities and normally ends up as a waste product known as slag. But …
Semantic Scholar extracted view of "Utilization of copper slag in cement and concrete" by C. Shi et al.
Using steel slag (SS) as cementitious material and fine aggregate in concrete is an effective and environmental method for SS consumption and cost reduction. In this paper, SS was recycled in large volumes in concrete as partial cementitious material and fine aggregate. The compressive strength and reaction mechanism of …
Companies are exploring other ways to break the take-make-dispose production model by using waste for alternatives to clinker — for example, slag from steel mills, and fly ash, a byproduct of...
DOI: 10.1061/jmcee7.mteng-16444 Corpus ID: 265274408; Steelmaking Slag Recycling as Raw Material and Its Effect on Burning Temperature of Portland Cement Clinker Production
DOI: 10.1016/j.jenvman.2020.110551 Corpus ID: 215727399; Recycling of lithium slag extracted from lithium mica by preparing white Portland cement. @article{Li2020RecyclingOL, title={Recycling of lithium slag extracted from lithium mica by preparing white Portland cement.}, author={Jinzhen Li and Pinghua Lian and Shaowen …
Fluidic silty sand is often difficult to use directly in engineering construction because of its low strength and plasticity index. This study employed steel slag to replace part of the cement in silty sand stabilization to broaden the feasibility of resource recycling and to reduce the construction cost and carbon emissions in engineering practices. A …
NewCem Slag is a finely ground, granulated blast furnace slag (GGBFS) available to blend with conventional Portland cement to deliver a strong, high-quality, durable concrete. A high-performing, sustainable product, …
Steelmaking plants continuously strive to reduce the environmental load in the steelmaking process, resulting in the recycling of energy, water, and other byproducts. In this chapter, techniques for the treatment and recycling of metallurgical slags are described. Metallurgical slags are considered secondary raw materials and are used or …
However, the Partial inclusion of slag for cement produces OPC or fully replaced by alkali-activated slag (AAS), which is more pumpable, chemically stable, and …
The proportions (by weight) of copper slag added to concrete mixtures were as follows: 30%, 40% and 50%. The proportions (by weight) of iron slag added to concrete mixtures were as follows: 30%, 40% and 50%. The proportions (by weight) of recycled concrete aggregate added to concrete mixtures were as follows: 20%, 25% and 30%.
At present, the researchers' conclusion is that the "SiGS concrete" is strong enough to be used for the same purposes as concrete containing pure cement without any slag additives. "Its early strength is lower, but after 28 days this increases so that it becomes just as strong as so-called environmental cement— at least, in the case of the ...
A new solution from Cambridge University could recycle both concrete and steel at the same time, by throwing old concrete into steel-recycling furnaces. If done using renewable energy, the process ...
Steel slag was used instead of sand to compare steel slag concrete with regular concrete. The findings showed that the steel slag concrete has good …
Abstract. The valorization of industrial wastes plays a significant aspect in decreasing the environmental pollution. The discussed study concerns the recovery of …
The results indicated that concrete mixes containing 50% replacement of cement with blast furnace slag gave the best results in terms of mechanical properties and durability when either natural or recycled concrete aggregate was used. Recycled concrete aggregate was not significantly detrimental to strength, particularly when the …
The vast amount of copper slag, a by-product obtained during smelting and refining of copper, was for many years treated as waste with no further use thereafter. Holcim Singapore has found a novel way of encapsulating copper slag into concrete, reducing the use of natural sand in cement production and avoiding the accumulation of …
Experimental work was carried out to study the effect of using steel slag (SS) and recycled concrete aggregate (RCA) as replacements for the natural aggregate in concrete. Waste materials, such as SS, which is a by-product generated during the production of steel and concrete rubble, which is produced by demolition activities, are dumped in landfill. …
The main focus is the potential use of SS as binder and aggregates in cement-based materials, notably in alkali-activated materials (AAM). The latter are …
According to the three different furnaces in the steelmaking process, steel slag can be categorized into basic oxygen furnace (BOF) slag, electric arc furnace (EAF) slag, and ladle furnace (LF) slag (Yildirim and Prezzi, 2011).Fig. 1 shows different steel making processes and the production of steel slags. As BOF and EAF have similar raw …