Changing the name of a commodity or repositioning a whole industry is not without precedent. Negative associations - to which names can contribute - are likely to impact an industry in many ways. Meanwhile, the high replacement rate in slag can result in a weak binder interface between the cement and fly ash. The use of slag cement with a Type I portland cement can provide equivalence to a Type II … Copper slag can be used in many applications such as concrete, landfills, Ballasts, bituminous pavements, tiles etc. cement.ca. The trouble with 'slag' According to the online Oxford English Dictionary, the word 'slag' is a noun, meaning 'stony waste separated from metals during smelting or refining of ore'. By using these waste materials in concrete we can control cost of materials used in construction. Iron slag is one of the industrial by-product from the iron and steel making industries. Chemical analysis is also observed to understand the effect of aging process in steel slag aggregate. Due to industrialization enormous by-products are produced and to utilize these by- products is the main challenge faced in India. Ideas can then be generated and researched against the objectives that have been set. Mobile secondary crushing … Slag is bi-product of Ferro alloys industries. Fly ash and blast furnace slag also increase the workability of concrete mixtures and can be used to mitigate potential alkali aggregate reactivity problems. The greater the percentage of GGBS, the greater will be the effect on concrete properties. The consumption of Slag in concrete not only helps in reducing greenhouse gases but also helps in making environmentally friendly material. In the 1990s, UK polytechnics, higher education establishments of lower status than the traditional universities, were permitted to call themselves universities. This is a distinctive characteristic of concrete with slag cement and is a typical occurrence. In general, the present method of preparing carbonated artificial steel slag aggregates provides an approach to solve the unsoundness problem of steel slag when used as aggregates in concrete. Variation in coarse aggregate influenced compressive and tensile strengths but … Re-naming and. SCIC #11, Slag Cement and Fly Ash, compares the two materials, explaining that while chemical similarities exist between them, they exert different influences in concrete applications. Variations in portland cement source caused changes in strength and scaling resistance properties. In the case of slag, a new name would need to break with the negative associations of the past and re-cast the slag industry in a more positive light, ideally communicating both its high-tech nature and its environmental credentials. II. These companies invest $billions behind global marketing campaigns every year: brand names need to work. 1. In our area, people are discussing the benefits or disadvantages of finishing exterior concrete containing ground granulated blast furnace (GGBF) slag. Following discussions at the 6th Global Slag Conference in Sydney in 2010, a number of preliminary suggestions were created (notwithstanding the research procedures outlined above). A typical combination is 50% GGBS with 50% Portland cement, but percentages of GGBS [4] anywhere between 20 and 80 % are commonly used. The Windscale nuclear facility in the UK was eventually re-named Sellafield following a nuclear accident in the 1950s. To make the reaction a bit hotter, the ready mix producer can add some extra cement (typically an extra 100 pounds per cubic yard) or can use Type III (high-early strength) cement, which hydrates more rapidly. It should always be used in conjunction with a qualifier: for example molten slag, slag-sourced, slag-product, slag-granulate, air-cooled slag product, slag-derived or slag-based. Slag cement helps in two ways: 1) reduced permeability reduces the ingress of deleterious sulfates into the concrete and 2) slag cement does not contain tricalcium aluminate, and thus lowers the total amount available for reaction. concrete slabs also results in flexural crack formation and possi-ble failure. The applications of steel slag powder and steel slag aggregate in ultra-high performance concrete (UHPC) were investigated by determining the fluidity, nonevaporable water content, and pore structure of paste and the compressive strength of concrete and by observing the morphologies of hardened paste and the concrete fracture surface. Governments often change the name of ministries too, to reflect changing priorities and to help them chime better with public sentiment. What a difference one word can make! However, for reasons indicated earlier, names do matter, because of what they say about somebody or something. Shanmuganathan et al., 2007 reviewed and mentioned that large amounts of copper slags are generated as waste worldwide during the copper smelting process. If the producer replaces GGBF slag pound for pound for cement, the mix would overyield. With the perjorative connotations of the word 'slag' in mind, delegates at the 6th Global Slag Conference, held in November 2010 in Sydney, were asked to propose alternative names for slag. Contrary to the assumptions of modern economics, people do not have access to perfect information when they make decisions and nor do they always make rational choices: Investment bubbles are testament to these facts. This enables clear briefs to be written for creative agencies. It provides great opportunity to utilize it as an alternative to normally available aggregates (coarse and Fine) and cement. How to Solve Common Concrete Problems in Construction:Sep . 2020-09-27T20:09:28+00:00 Mobile Crushers; Stationary Crushers; Grinding Mill; Washing & Screening; Ore Beneficiation; Primary mobile crushing plant. Research would ideally incorporate two distinct phases: a qualitative phase and a quantitative one. When the strength is measured, it is found that the concrete replacing crushed stone with unstable steel slag … Another group suggests that the excess fines in a flatwork surface are more likely due … There have been many examples in recent years of companies changing their name to re-invent themselves and to promote a more positive image or following merger or de-merger: for example, Kentucky Fried Chicken became KFC (a more positive sounding acronym), Philip Morris became Altria and Anderson Consulting became Accenture. CORROSION OF EMBEDDED METALS Fig. cement.ca . Moreover the recycling of industrial waste slag is the core content of sustainable development. The list includes a number of names that are already trademarked and are included to illustrate the thinking of Global Slag delegates. Once a short-list of options has been drawn up, quantitative research could help provide a final check and determine the 'winner.'. Air-cured concrete had higher scaling resistance than concrete cured with commercial curing compounds. For slag, appendix of 989 (Specification for Ground Granulated Blast-Furnace Slag for Use in Concrete and Mortars) (ASTM, 1993) suggests using either the 0.02% expansion with job materials or a 75% greater reduction in expansion using a high-alkali cement. Negative associations will influence the size and quality of the available graduate pool from which the industry draws its managers and leaders of the future, how current employees and suppliers feel about working in it, the decisions of investors to lend money to it or buy shares of companies active in the industry, as well as the broader climate of public opinion in which it operates and seeks to advance its interests. In a word, 'No.' To many familiar with this definition, it conjures up the image of the unsightly slagheap, scarring the landscape in the industrial hinterlands coal mining and metal refining regions worldwide. Companies give much thought to the names of brands that they own. The suggestions took into account the following factors that a new name for 'slag'. When the iron is processed using a blast furnace, slag and iron both collect at the bottom of the furnace.The molten slag must first be separated from the molten iron. The safe disposal of this waste is a lack, costly and causes environmental pollution. cement.ca. Copper slag is used in the concrete as one of the alternative materials. Of course it is difficult to place a value on these effects in the case of the slag industry, but they are likely to be non-trivial. Slag cement and fly ash are supplementary cementitious materials often included in contemporary concrete mixes. Another group suggests that the excess fines in a flatwork surface are more likely due to early or poor finishing techniques than the presence of the slag. PAST RESEARCHES ON STEEL … Most concrete contains cement, some other types of cementitious material such as fly ash or slag cement, coarse aggregates such as gravel or limestone, and fine aggregates such as sand. The only potential problem with steel slag aggregate is its expansive characteristics and undesirable reactions between slag and components of concrete. It often reveals valuable insights not previously considered and can be the inspiration for new and better ideas. Considering both the mechanical performance and the volume stability of aggregates, the mix proportion of S60F30 was the best formulation for the preparation of carbonated steel slag aggregates … The achieved results indicate that the hydraulicity of the cupola slag is incomparable with the hydraulicity of the blast-furnace slag; this may be associated with the problems that arise when the slag of this type is used in the building industry. Would the epitome of all-American masculinity, John Wayne, have succeeded as the metrosexually-named Marion Morrison? Thus the UK Ministry for Agriculture, Food & Fisheries (something that sounds like it is concerned with the exploitation of the land and the sea), became the Department for Environment, Food and Rural Affairs (something whose implied mission is more benign). © 2020 Pro Global Media Ltd. All rights reserved. Les cendres volantes et le laitier de haut fourneau peuvent aussi améliorer la malléabilité du mélange de béton et atténuer les éventuels problèmes de réaction alcali-silice. "Slag is a terrible name" says McCaffrey, "signalling something dirty and industrial, as well as having other, less savoury associations." They are therefore replaced with stage names designed to do the opposite. For these reasons, it is always wise to research potential names for new brands or new names for an existing one. This causes an expansive reaction and resulting deterioration of the concrete structure. The following summary discusses potential causes of concrete deterioration and the factors that influence them. Solidified concrete that is containing slag cement sometimes have the appearance of blue-green or mottled green areas on the surface during the first few days after placement of the concrete is completed. Above: A selection of the names suggested by Global Slag delegates for use instead of 'slag.' The 'scrap metal merchant' of my childhood is these days a business engaged in 'metal recycling.' It is the waste product of copper. So, he says, any surface defects in properly batched and placed exterior concrete are caused by the particle size of the concrete ingredients. Global Slag Conference convenor Robert McCaffrey believes that a change of name could transform the way stakeholders view the industry. Our experts suggest that the change in bleeding is why it's more difficult to accurately judge when to get on the slab for the final finish. The American Concrete Institute. It would also need to be conducted in several countries - particularly those most important to the industry. However, we have one small suggestion that will certainly improve the situation: never use the word 'slag' on its own. Les cendres volantes et le laitier de haut fourneau peuvent aussi améliorer la malléabilité du mélange de béton et atténuer les éventuels problèmes de réaction alcali-silice. Self-compacting concrete is growing rapidly, especially in the precast market where its advantages are rapidly understood and utilized. Using fly ash in concrete is environmentally beneficial because it reduces the Portland cement (a major contributor of CO2) required in concrete. After all, it is in the high-tech, environmentally-responsible business of transforming and recycling materials that would otherwise find their way into landfill sites: material that is versatile and virtually CO2 free. Generation of industrial by-products concrete with slag cement concrete was within acceptable limits convenor Robert McCaffrey believes that a positive! Major advantages or disadvantages to using slag cement and fly ash and blast furnace ( )! 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