Also, the use of pozzolans as additives to cement, and more recently to concrete, is well accepted in practice. To varying degrees, cement substitutes work in two ways. Ggbs is an acronym for ground granulated blast furnace slag, a byproduct from the manufacture of iron. A wide variety of ggbs cement options are available to you, there are 202 suppliers who sells ggbs cement on, mainly located in asia. Blue circle ground granulated blastfurnace slag ggbs. Tech scholar professor department of civil engineering department of civil engineering g. Behaviour of self compacting concrete made with ggbs and rha under axial compression and flexure synopsis of the thesis proposed to be submitted by muddapu swaroopa rani reg. Effect of cementitious waste material ggbs on concrete as a. Ground granulated blast furnace slag ggbs the importance of ground granulated blast furnace slag ggbs lies in its greener way to become a substitute in concrete material. After iterative trial mixes the water cement ratio wc was selected as 0. Durability of mortars containing ground granulated blastfurnace. Ground granulated blast furnace slag ggbs is byproduct from the blastfurnaces of iron and steel industries. The strength development of the composites with ggbs is slower.
The blends can be supplied as preblended factory produced cements, or can be formed in the mixer by adding portland cement and ggbs each from its. Ggbs is used as a direct replacement for portland cement, on a onetoone basis by weight. The replacement of portland cement with ggbs will lead to significant reduction of carbon dioxide gas emission. Groundgranulated blastfurnace slag ggbs or ggbfs is obtained by quenching molten iron. Is ggbs a good partial replacement for cement in concrete mix. As per is codes what is the maximum ggbs content i can add into concrete as a replacement of cement. In the construction industry mainly the production of portland cement will causes the emission of pollutants results in environmental pollution. Article pdf available in cement and concrete composites. May 20, 2014 ground granulated blastfurnace slag ggbs is a green construction material used to produce durable concrete. The secondary pozzolanic reactions can result in reduced pore connectivity.
The mortars were tested in the environment containing acids and. The blends can be supplied as preblended factory produced cements, or can be formed in the mixer by adding portland cement and ggbs each from its own silo. Ggbs ground granulated blastfurnace slag is used all over the world as a direct replacement for portland cement. However, some concerns regarding its performance in freezing environments have been raised. Blast furnace slag ggbs has been used as a supplementary material along with the cement.
Experimental study on partial replacement of cement by flyash and ggbs syed asif ali1 professor shaik abdullah2 1p. Manufacturing portland cement pc is a major contributor of greenhouse gases, responsible for about 5 % of all global carbon dioxide emissions habert and roussel 2009. High strength concrete incorporating ground granulated blast. Ground granulated blast furnace slag ggbs is one such pozzolanic material termed by a few as a supplementary or complimentary cementitious material which can be used as a cementitious ingredient in either cement or concrete. From structural point of view, ggbs replacement enhances lower heat of hydration, higher durability and higher resistance to sulphate and chloride attack when compared with normal ordinary concrete. What is maximum content of ggbs in concrete mix design.
Concrete plays a vital role in the development of infrastructure viz. Nsa leachate from blast furnace slag april 8, 2003 page 2 leachate what it is, how to treat it leachate can be described as a solution or product that is obtained when a solid material has been extracted or dissolved by the action of a percolating liquid water. Experimental study on geopolymer concrete incorporating ggbs. Concrete made with ggbs cement sets more slowly than concrete made with ordinary portland cement, depending on the amount of ggbs in the. Fa was obtained from drax coalfired power station in the uk. Ecocem ggbs is a high performance alternative to traditional cement that will increase the technical performance of your application, improve its appearance and minimize its environmental impact. Ggbs and pfa are materials that can be added to cement made from clinker to produce different types of grey cement, or to replace a proportion of cement made from clinker when making concrete. The information in this fact sheet is aimed at providing lifecycle1 data to inform carbon footprinting in the concrete. Ggbs is one of these supplementary materials used to replace with cement to reduce the consumption of the cement. Experimental study on partial replacement of cement by. Its blains specific surface area and fineness of cement were 35 cm2g and 9% respectively. Ggbs concrete at the early stage is smaller, they are rarely. Is ggbs a good partial replacement for cement in concrete. Various mix combinations with a partial replacement of 10%, 20%, 30% and 40% by the weight of cement by ggbs was taken and 0.
Strength development characteristics of concrete produced. Durability of mortars containing ground granulated. Casting and testing detail total number 12 cubes and 8 cylinders were casted. Another major hurdle of extensive use of ggbs concrete lies in the little source of supply of ggbs. Kanta rao abstract the major problem the world is facing today is the environmental pollution. May 26, 2016 after the molten iron is tapped off, the remaining molten slag, which consists of mainly siliceous and aluminous residue is then waterquenched rapidly, resulting in the formation of a glassy granulate.
Groundgranulated blast furnace slag is highly cementitious and high in csh calcium silicate hydrates which is a strength enhancing. Pdf strength and durability studies on ggbs concrete. G student structural engineering 2professor 1,2department of civil engineering 1,2k. Thus this shows that cement content can be reduced in soil solidification when. Investigation of the rheology and strength of geopolymer mixtures for. Ground granulated blast furnace slag in concrete and its. In addition, the uk has a tradition of combining cem i with either ground granulated blastfurnace slag ggbs or fly ash. Aggregates, cement and readymix concrete market investigation ggbspfa working paper introduction 1. Suitability of bs en 1971 cem ii and cem v cement for. Regen is more sustainable than other cement substitutes such as fly ash. Iron ore, coke, and limestone are fed into the furnace and. Ggbs was obtained from ironmaking production in the uk. The normal ratios and proportions of aggregates and water to cementitious material in.
With this view we have made an attempt is to replace cement by a mineral admixture, i. On the basis of the wels for similar materials eg, portland cement and calcium silicate, lafarge cement recommend applying a wel of 10mg m. Use of ggbs concrete mixes for aggressive infrastructural applications enterprise ireland ecocem ireland innovation partnership programme project code ip20080540. Slower strength development and potentially higher longterm strength. Strength ggbs cement has a higher ultimate strength than concrete made with portland cement. Ggbs is defined as ground granulated blastfurnace slag cement additive frequently.
Cement was replaced with mk at a constant level of 10% while ggbs is substituted cement at various levels of 15%, 20%, 25% and 30% as a ternary blending. Dejadurability of the mortars and concretes containing ground converter slag. Using one tonne of regen in concrete reduces the embodied co2 by around 900kg, compared to using one tonne of portland cement, and also increases its durability. Partial replacement of cement with ggbs in concrete. Murali krishnan2 1 assistant professor, 2 student, department of civil engineering mailam engineering college, mailam, villupuram district, tamil nadu 604 304. A concrete using cement alone as a binder requires high paste volume, which often leads to excessive shrinkage and large evolution of heat of hydration, besides increased cost. Final setting time min 265 the granulated slag is extracted from the process of pig iron production, where the molten slag is quenched with cold water, producing glassy granulates. It is added to the concrete mixer along with ordinary cement, aggregates and water. Scale up clinker substitution with fly ash and blast furnace slag, and increase. N engineering college, gulbarga, karnataka, india abstract this paper presents a. Durability of the mortars and concretes containing ground converter slag.
This is important interview question, i want correct answer for it. Use of granulated blast furnace slag as fine aggregate in cement mortar m c nataraja1, p g dileep kumar2, a s manu1 and m c sanjay1 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. Ground granulated blastfurnace slag ggbs is one of the concrete additions. Properties of concrete with ground granulated blast furnace. Fresh and hardened properties of selfcompacting concrete using. Ground granulated blastfurnace slag ggbs is a cementitious material for use as part replacement of cement opc. Ggbs concrete ggbs proportions on its own, ground granulated blast furnace slag ggbs hardens very slowly and, for use in concrete, it needs to be activated by combining it with portland cement.
Very occasionally, it can be found up to a ratio of 90% ggbs and 10% pc. Pdf investigation of the rheology and strength of geopolymer. Ggbs stands for ground granulated blastfurnace slag cement additive. Ggbs producing cement uses a great deal of energy, so finding a waste product that can substitute for cement makes good environmental sense. Ground granulated blastfurnace slag ggbs is a common addition to portland cement pc composites. As hong kong is not a major producer of steel, ggbs as a byproduct of steel has to be imported overseas and this introduces higher material cost due to transportation and the supply of ggbs is unstable and unsteady. During this process, the slag gets fragmented and transformed into amorphous granules glass, meeting the requirement of is 12089. Ggbs partially replaced in concrete in step of 20% 0%, 20%, 40% and 60%. High strength concrete incorporating ground granulated. If it is to improve sulfate resistance, it is an excellent thing to do. Regen ground granulated blast furnace slag ggbs is a cement substitute, manufactured from a byproduct of the ironmaking industry.
Nov 01, 2014 powerfloating as ggbs concrete stays plastic for a longer time than portland cement concrete, this enables the contractor to achieve a very flat finish. Ground granulated blast furnace slag ggbs chemical. Durability properties and microstructure of ground. Ground granulated blastfurnace slag ggbs to bs 6699. Groundgranulated blastfurnace slag ggbs or ggbfs is obtained by quenching molten iron slag a byproduct of iron and steelmaking from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine powder. Concrete is a mixture of cement, fine aggregate, coarse aggregate and water. From the above two differences in composition compared with the portland cement, would show changes in the hydration reaction as well as the hydration products that are given ggbfs. In comparison, the production of ground granulated blastfurnace slag ggbs requires less than a fifth of the energy and produces less than a tenth of the carbon dioxide emissions. An investigation into the suitability of ggbs and opc as low. What is the advantage of using ggbs as replacement of. After the molten iron is tapped off, the remaining molten slag, which consists of mainly siliceous and aluminous residue is then waterquenched rapidly, resulting in the formation of a glassy granulate.
Ground granulated blast furnace slag conclusion jsw cement. Earlyage strength of ggbs concrete is lower than the normal pc concrete which limits its use in the. The influence of up to 10% ground granulated blastfurnace slag ggbs and silica fume sf inclusion within geopolymer. Ggbs ground granulated blastfurnace slag cement additive. Looking for online definition of ggbs or what ggbs stands for. Ssrg international journal of civil engineering ssrgijce volume 2 issue 10 october 2015 issn. Ggbs is not currently listed in the table of workplace exposure limits wels, approved by the uk health and safety commission. Executive summary the case for research into the deterioration associated with water and wastewater. Introduction the blast furnace slag is a byproduct of the iron manufacturing industry. Use of ggbs concrete mixes for aggressive infrastructural. This glassy granulate is dried and ground to the required size, which is known as ground granulated blast furnace slag ggbs. The appropriate cement content for concrete of a given 28 day cube strength and slump should be determined from trial mixes.
It improves the quality and durability of concrete. So incorporating this waste material in concrete can reduce the depletion of conventional concrete components such as cement, fine aggregate and coarse. Pdf study on strength properties of concrete using ggbs. Cem iggbs concrete when compared with tarmac bulk portland cement concrete at the same cement content has the following properties. Durability properties and microstructure of ground granulated. Properties of concrete with ground granulated blast.
What is the advantage of using ggbs as replacement of cement. However, as always, we need to ask what the intention is. The use of ggbs in concrete has proved to improve certain properties, when compared to portland cement concretes. A cem i, 52,5n portland cement used for reference concrete mix for blending with fa, ggbs and sf to produce cem ii and cem v cements for the study. Murali krishnan2 1 assistant professor, 2 student, department of civil engineering mailam engineering college, mailam, villupuram district, tamil nadu. Granulated blast furnace slag is obtained by rapidly chilling quenching the molten ash from the furnace with the help of water. Ggbs, which is a byproduct of the manufacturing of iron in the blast furnace, can partially replace cement in concrete. Partial replacement of cement with ggbs in self compacting. Wainwright pj, rey n 2000 the influence of ground granulated blast furnace slag ggbs additions and time delay on the bleeding of concrete.
In order to investigate this theory, this research investigates the durability properties of ggbs concrete for applications as water infrastructures. The normal ratios and proportions of aggregates and water to cementitious material in the mix remain unchanged. Yes ggbs is a good partial replacement for cement in concrete mix. Self compacting concrete mixtures produced, tested and compared in terms of compressive,split tensile. The top countries of suppliers are india, china, and vietnam, from which the percentage of ggbs cement supply is 4%, 88%, and 5% respectively. An experimental study on behaviour of ggbs in ferrocement wall. Experimental study on geopolymer concrete incorporating ggbs v. It is always used in combination with portland cement, typically in the range 60% pc and 40% ggbs to 30% pc and 70% ggbs, depending on the application. Ggbs is listed in the worlds largest and most authoritative dictionary database of abbreviations and acronyms the free dictionary.
Physical properties of ground granulated blast furnace slag ggbfs ground granulated blast furnace slag have a color nearly white in appearance. With over 200 sites and more than 3900 dedicated employees, were home to everything from aggregates, asphalt, readymixed concrete and precast concrete products. Fa and sf used were conforming to bs en 4501 and bs 2631 respectively. Ggbs cement is added to concrete in the concrete manufacturers batching plant, along with portland cement, aggregates and water. Effect of cementitious waste material ggbs on concrete. On the other hand, it also contributes to environmental protection because it minimizes the use of cement during the production of concrete. Cembureau the european cement association based in brussels is the representative. Two major uses of ggbs 2 are in the production of qualityimproved slag cement, namely portland blast furnace cement pbfc and highslag blastfurnace cement hsbfc, with ggbs content ranging typically from 30 to 70% and in the production of readymixed or sitebatched durable concrete. Ggbs is very useful in the design and development of highquality cement pastemortar and concrete. The production of ggbs requires less additional energy as compared with the energy needed for the production of portland cement. May 21, 2017 yes ggbs is a good partial replacement for cement in concrete mix. What is maximum content of ggbs in concrete mix design civil4m. Concrete made with ggbs cement sets more slowly than concrete made with ordinary portland cement, depending on the amount of ggbs in the cement mix, but also continues to gain strength over a longer period leading to improved overall durability and life expectancy. On top of that, we produce, import and export supply materials for cement and offer national road surfacing and contracting services.
How is ground granulated blastfurnace slag cement additive abbreviated. Can i add ggbs beyond the limit specified in is code. Powerfloating as ggbs concrete stays plastic for a longer time than portland cement concrete, this enables the contractor to achieve a very flat finish. Specialty cement vcem ggbs ground granulated blastfurnace slag ggbs engro is the pioneer and leading manufacturer of ground granulated blastfurnace slag ggbs. A typical combination is 50% ggbs with 50% portland cement, 4but percentages of ggbs anywhere between 20 and 80 % are commonly used. Replacement levels for ggbs vary from 30% to up to 85%. Ggbs being a waste material, it needs proper method for disposal. In the concrete for the sydney harbour tunnel, we used marine cement which is a blended cement. Effect of cementitious waste material ggbs on concrete as a replacement in cement quaid joharbhattiwala kuldeep dabhekar m. The paper deals with corrosion resistance of cement mortars with various amounts of ground granulated. Partial replacement of cement with ggbs in self compacting concrete for sustainable construction j. A wide variety of ggbs price options are available to you, there are 71 suppliers who sells ggbs price on, mainly located in asia.
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