The hypotheses that may primarily determine how the slag amendment affects rhizosphere microbial community and ecosystem services are, (1) as a rich source of fertilizer components, the slag ...
slag, starting from 1880, the slag obtained in Bessemer or Thomas furnaces is used as phosphate fertilizer; in 1909, in Germany, is published the first standard on the use of blast furnace slag in cement industry, this are just some of the events gleaned from the evolution of "knowledge" of metallurgical slag.
The potential use of the slag reed bed with higher P-removal capacity for secondary and tertiary treatment under the field conditions was indicated, however, the P-sorption isotherms obtained under the laboratory conditions could not be used favorably to determine the longevity of the reedBed in terms of P-retention. Research was conducted at Middle East Technical University (METU), Ankara ...
gravity of copper slag, zinc slag and steel slag varied in the range of 2.75 – 3.6[5] Kajal et al (2007) Study present the use of waste plastic and copper slag in hot bituminous mix to enhance pave-ment performance, bituminous mixes were prepared by mixing of …
XRF of slag. Scientists at Thermo Fisher Scientific analyzed metallurgical slag samples with the Thermo Scientific™ ARL™ QUANT'X EDXRF Spectrometer. Applications of XRF in industrial process control are calibrated using empirical calibrations on the basis of primary or secondary standards. The results were obtained using a multi-variable ...
The rock-like material formed during the process of electric arc furnace steelmaking is referred to as EAF slag. An ad hoc committee will assess human health risks associated with the unencapsulated use (e.g., loose ground cover material for landscaping and driveways) of EAF slag.
12%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 strength improvement within a 28-day interval at full replacement of a clay component with slag made 62%. The heat burning input of limestone-slag mixes may be reduced by over 0.85 mJ/t.
The aim of this study was to investigate the effects of usage of Ca - containing metallurgical slag from Steel factory from Smederevo, Republic of Serbia (owned by U.S. Steel), through vegetative experiments performed in semi-controlled conditions on two types of acid soils (Lessivated Cambisol and Pseudogley). The studied parameters were chemical properties of soils and chemical composition ...
Slag is a by-product formed in most metallurgical process. During the steelmaking process a large amount of slag is produced, which becomes a source of waste, which in many instances is land filled. Such areas filled with waste materials have become a significant source of pollution. Slag recycling is then becoming important in recent years.
The characteristic of Angang blast furnace slag was studied by X-ray fluorescence spectrometry, DSC, X-ray diffraction and SEM. SiO2-Al2O3-CaO system glass-ceramics have been obtained successfully from slag with other additives. The properties of slag-based glass-ceramics were analyzed in this paper. It has been found that nucleation temperature is in the range of 600~700 °C, and ...
The use of steel slag in asphalt mixture was also addressed by Hassan & Khabiri (2007) and Norman et al. (1992) based on Marshall and stability tests according to European Standard EN 12697-34 (2012).
Abstract. The successful incorporation of steel slag as aggregates in construction products requires the consideration of certain issues. Firstly, as steel slag is an industrial byproduct until recently disposed in landfills, the question is whether it is suitable for use in construction.
Physical properties. Copper slag grains have a color of black glassy type and a fineness modulus of 3.5. The hardness is about 7 Moh's scale. Other typical physical properties are given in Table 2.In order to use copper slag as a mineral admixture, it was necessary to carry out an experimental study associating grinding time, average diameter, and pozzolanic activity assessed in mortars [].
This paper investigates the possibility of utilizing Granulated Blast Furnace Slag (GBFS) as a sand substitute in cement mortar, in order to reduce environmental problems related to aggregate mining and waste disposal. In this investigation, cement mortar mix 1:3 and GBFS at 0, 25, 50, 75 and replacement to natural sand for constant w/c ratio of 0.5 is considered.
physically makes sense to use slag in pavement layers and to understand the environmental implications which include the reduction of materials use, thus yielding cost and energy savings. Scientific Cooperations Journal of Civil Engineering and Architecture, Vol. 2, Issue 1, Feb. 2016 28
You might hear an astronomer use this word, but not in the bedroom -- a galactic bulge is the center of a galaxy made of mostly older stars. The Milky Way's core is made of 10,000 stars, and last year, scientists discovered it is shaped like a peanut.
The carbonated slag can be successfully utilized as green construction materials in blended cement mortar. By this modulus, the global CO2 …
The Use of Steel Slag in Asphaltic Mixture. Download. Related Papers. Steel Slag and Waste Management. By Mustafa Kara. Technical and environmental evaluation of metallurgical slags asaggregate for sustainable pavement layer applications. By İslam Gökalp.
First, the slag was grinded in a horizontal ball mill for 6 h at 1000 r/min, then mixed the cement with smelting slag in the sand-cement ratios(S/C) of 4:1, 7:3, 3:2, 2:3, 3:7 and 1:4, CTAB and ...
These are general statements base d on a review of scientific literature that . ... However, it should be noted that for some type CH fly ashes and slag, even the use of 65% .
Slag: From By-product to Valuable Construction Material. By Stephen Dietz 07.29.2014. Slag is a by-product of the metallurgical smelting process. Slag has a double role: it permits removal of impurities, known as gangue, from the melt by …
The use of steel slag has been restricted because free CaO present in steel slag causes a severe volume expansion during the hydration process (Wang, 2010;Salihoglu and Pinarli, 2008), which can ...
Collaborations of researchers, slag producers and processors, government agencies, environment regulators, and contractors can create good results for the novel use of slag. Guidelines, quality control, and compliance rules for order acceptance and delivery of slag products are critical for the practical use of slag foundation and geotechnical ...
In Europe there are nearly 500 incinerators. There are over 2000 of them in the world. It is estimated that the combustion of 1 ton (Mg) of waste produces about 250–300 kg of slag. Due to the large amounts of this waste, the construction industry's demand for raw materials and the reduction of CO2 emissions, research was undertaken to use slags as a cement component.
M. Nicolae, I. Vîlciu, and F. Zǎman, "X-ray diffraction analysis of steel slag and blast furnace slag viewing their use for road construction," UPB Scientific Bulletin Series B, vol. 69, no. 2, pp. 99–108, 2007. View at: Google Scholar
This work has for objective to evaluate the microstructural aspects and technological properties of a clayey ceramic incorporated with up to 30 wt.% of a waste generate during the steel-making process, denoted as steel slag. To determine the physical and mechanical properties such as linear shrinkage, water absorption and flexural strength, specimens were prepared by 18 MPa uniaxial pressure ...
The basic slag (S1) resulted in the greatest expansion (0.08% at 180 days), while the use of acid slag (S3) significantly reduced the expansion (0.03% at 180 days), neutral slag giving an intermediate value of 0.5% after the same time. The authors therefore concluded that the use of acid slag should be recommended to reduce the impact of the ...
Use of slag in the EU. Posted on 26/05/2015. by Mikey. For over 25 years, despite the general use of slag products in construction, there has been an on-going argument about whether slag is a waste or a by-product. Still today, the situation concerning the classification of slag is not uniform within European member states.
Slag definition, the more or less completely fused and vitrified matter separated during the reduction of a metal from its ore. See more.
The study on the use of blast furnace slag, steel slag and fly ash as raw materials to produce cement clinker has been carried out in the present investigation. The burnability of raw meal was determined by the linear shrinkage and free lime content of clinkers sintered at different temperatures. The microstructrue and properties of raw meal and clinker were investigated by the means of ...
This paper presents the effect of Ultrafine Slag in high strength concrete with cement replacement of 5%, 10%, 15% and 20%. Nowadays high strength concrete generally made with Ordinary Portland Cement. In this investigation Portland Pozzolana Cement (PPC) Fly ash based was used to make concrete more environmental friendly. In this experiment five mixes were prepared in which one mix …
The use of slang has been common among doctors for years, ... He was a natural linguist, and he kept notebooks, making a scientific study of the workers' slang or argot, until he could talk quite intelligibly. Others include fribble, ning-nong and gink, American slang for a fool.