V 2, ganapathy ramasamy 2 1assistant professor, department of civil engineering, srm university, chennai, india. Groundgranulated blast furnace slag is highly cementitious and high in csh calcium silicate hydrates which is a. Portland cement, pozzalonic materials like fly ash and ggbs, rich in silica and. The effect of fineness on the hydration activity index of ground. What is maximum content of ggbs in concrete mix design civil4m. Ground granulated blast furnace slag ggbs is byproduct from the blastfurnaces of iron and steel industries. This glassy granulate is dried and ground to the required size, which is known as ground granulated blast furnace slag ggbs. Effects of ground granulated blast furnace slag in.
All these properties of cement are tested by referring is specification for ordinary portland cement. V 2, ganapathy ramasamy 2 1assistant professor, department of civil engineering, srm university, chennai, india 2postgraduate, department of civil engineering, srm university, chennai, india received 17 june. Ground granulated blastfurnace slag ggbs to bs 6699. Casting and testing detail total number 12 cubes and 8 cylinders were casted.
Conditions to avoid ggbs should be stored enclosed such as a product bags or silos and avoid storing out in the open. Durability properties and microstructure of ground granulated blast. Thus it can replace portland cement by up to 85% in making readymixed concrete. The appropriate cement content for concrete of a given 28 day cube strength and slump should be determined from trial mixes. It is supplied by a number of cement companies in ireland. High strength concrete incorporating ground granulated blast. Properties of concrete with ground granulated blast furnace. Introduction the blast furnace slag is a byproduct of the iron manufacturing industry. Powerfloating as ggbs concrete stays plastic for a longer time than portland cement concrete, this enables the contractor to achieve a very flat finish.
Value propositions using ggbs concrete last modified by. Design of selfcompacting concrete with ground granulated. Is ggbs a good partial replacement for cement in concrete. Slag it is possible to reduce the carbon footprint of cement by up to. In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. The present paper focuses on investigating characteristics of m20 and m40 grade concrete with partial replacement of cement with ground granulated blast furnace slag ggbs by replacing cement via 30%, 40%, 50%. Ggbs partially replaced in concrete in step of 20% 0%, 20%, 40% and 60%. Ggbs dust does not present any fire or explosion hazard. Study on strength properties of concrete using ggbs and steel fiber as partial replacement of cement dhanya r 1, arasan g. The cubes, cylinders and prisms are tested for compressive strength. 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. Ground granulated blastfurnace slag ggbs is a green construction material used to produce durable concrete. Partial replacement of cement with ggbs in self compacting. 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.
Ggbs ground granulated blast furnace slag is by product from the blast furnaces used to make iron. Ggbs is one of these supplementary materials used to replace with cement to reduce the consumption of the cement. Very occasionally, it can be found up to a ratio of 90% ggbs and 10% pc. Regen is more sustainable than other cement substitutes such as fly ash. Pdf strength and durability studies on ggbs concrete. Experimental study on partial replacement of cement by. Transportation is by bulk tankers, as for portland cement. However, by mixing ordinary cement with a material called. Slower strength development and potentially higher longterm strength. With over 200 sites and more than 3900 dedicated employees, were home to everything from aggregates, asphalt, readymixed concrete and precast concrete products. Tech scholar professor department of civil engineering department of civil engineering g. On the basis of the wels for similar materials eg, portland cement and calcium silicate, lafarge cement recommend applying a wel of 10mg m. Experimental study on partial replacement of cement by flyash and ggbs syed asif ali1 professor shaik abdullah2 1p. To assess the concrete produced using ggbs by complete replacement of cement at different molarities 3m.
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. Ground granulated blast furnace slag ggbs a waste product of steel industry, known to have cementitious properties. Blue circle ground granulated blastfurnace slag ggbs. What is maximum content of ggbs in concrete mix design. Effect of cementitious waste material ggbs on concrete. Physical properties of ground granulated blast furnace slag ggbfs ground granulated blast furnace slag have a color nearly white in appearance. The single type of fibre with reinforcement in concrete improves the mechanical properties at certain level. 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. The majority of cement shipments are sent to readymixed concrete producers figure 16. Ggbs cement has exactly the same chemical constituents as ordinary portland cement, only in slightly differing proportions.
Ground granulated blast furnace slag ggbs jsw cement. Ground granulated blast furnace slag ggbs based concrete. Effects of ground granulated blast furnace slag in portland. The premier aggregate leachate from blast furnace slag what it is and how to treat it the following is a brief description of blast furnace slag chemistry and the. 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. Ground granulated blastfurnace slag ggbs is a cementitious material for use as part replacement of cement opc. Partial replacement of cement with ggbs in self compacting concrete for sustainable construction j. 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. Yes ggbs is a good partial replacement for cement in concrete mix. A wide variety of ggbs cement options are available to you, there are 202 suppliers who sells ggbs cement on, mainly located in asia. Dust control is the same as that required for portland cement.
Apr 19, 2007 ggbs cement has exactly the same chemical constituents as ordinary portland cement, only in slightly differing proportions. Strength ggbs cement has a higher ultimate strength than concrete made with portland cement. Ggbs can also be moved by airslides, cement screws and bucket elevators. Experimental study on magnesium silicate hydrate cement blended with partial replacement of ggbs international journal of earth sciences and engineering issn 09745904, vol. The use of supplementary cementitious materials as partial replacement to portland cement in concrete is a better step towards. Pdf characteristics of ggbs as an alternate material in. Ggbs in self compacting concrete production as partial replacement of cement. Ggbs is a byproduct slag material from the iron and steel indust 7hb.
However, some concerns regarding its performance in freezing environments have been raised. Introduction to concrete portland cement association. 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. During this process, the slag gets fragmented and transformed into amorphous granules glass, meeting the requirement of is 12089. 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. N engineering college, gulbarga, karnataka, india abstract this paper presents a laboratory investigation on. It consists primarily of oxides of calcium, silicon, aluminium and magnesium.
Iron ore, coke, and limestone are fed into the furnace and. Granulated blast furnace slag is obtained by rapidly chilling quenching the molten ash from the furnace with the help of water. 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. Ggbs also possesses better chloride resisting properties with a finer pore structure as compared to opc cement bamforth, 1995. Can i add ggbs beyond the limit specified in is code. Opc used with ggbs blend chemically binds the chlorides with slag hydrates effectively reducing the mobility of chlorides thereby reducing the reinforcement corrosion risk. Partial replacement of cement with ggbs in concrete. And we have an unrivalled product range which includes portland cement, white portland cement, ggbs and fly ash. On top of that, we produce, import and export supply materials for cement and offer national road surfacing and contracting services. Influence of granulated blast furnace slag on mechanical properties. 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.
Ground granulated blast furnace slag ggbs is a byproduct from steel industry. In order to reduce carbon emissions, it is feasible to add 70% ground granulated blast furnace slag ggbs in concrete mixtures 8. Ggbs can be used as filler and helps to reduce the total voids content in self compacting concrete. Ggbs low carbon cement is produced in ireland as well as imported. May 21, 2017 yes ggbs is a good partial replacement for cement in concrete mix. This is the most widely use scms with replacement of cement in concrete mixes.
In fine particle form, slag cement displays cementitious qualities similar to those of ordinary portland cement opc. Slag cement is a byproduct of the ironmaking process and is composed primarily of silica and calcium. It improves the quality and durability of concrete. The use of ggbs in concrete has proved to improve certain properties, when compared to portland cement concretes. Constant level of fly ash is also used in all set of mix proportion to increase the powder content for achieve the workability. An investigation on portland cement replaced by highvolume ggbs. Contains less than 2 ppm water soluble chromium vi. Ggbs is very useful in the design and development of highquality cement pastemortar and concrete. Properties of concrete with ground granulated blast. Effects of domestic rawsewage on mechanical properties of. The production of ggbs requires less additional energy as compared with the energy needed for the production of portland cement. Ggbs, which is a byproduct of the manufacturing of iron in the blast furnace, can partially replace cement in concrete. As per is codes what is the maximum ggbs content i can add into concrete as a replacement of cement. Slag activity index s ai according to astm c98994a 10, slag activity index is the percentage ratio of average compressivestrength of slag cement mor.
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. Effect of ggbs and nano silica on the durability properties. As a leading supplier of building materials, hanson uk offers a wide range of cement products, suitable for all different uses, from general purpose to waterproof, quick dry, premixed and ready mix cement. This is important interview question, i want correct answer for it. Effects of ground granulated blast furnace slag in portland cement concrete pccwisconsin highway research program whrp 0701 irene k. Murali krishnan2 1 assistant professor, 2 student, department of civil engineering mailam engineering college, mailam, villupuram district, tamil nadu 604 304. G student structural engineering 2professor 1,2department of civil engineering 1,2k. Murali krishnan2 1 assistant professor, 2 student, department of civil engineering mailam engineering college, mailam, villupuram district, tamil. A typical combination is 50% ggbs with 50% portland cement, 4but percentages of ggbs anywhere between 20 and 80 % are commonly used. Cement with ggbs replacement has emerged as a major alternative to conventional concrete and has rapidly drawn the concrete industry. Share copy and redistribute the material in any medium or format.
Ggbs is not currently listed in the table of workplace exposure limits wels, approved by the uk health and safety commission. Ground granulated blast furnace slag in concrete and its. Ggbs has a low reactivity and does not react under normal storage and use conditions. Replacement of fine aggregates with ggbs serves a dual purpose in this study. High strength concrete incorporating ground granulated. 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. Chapter 12testing of cement part 1 page 61 a bed of cement is prepared in special permeability cell and have exact porosity e 0,500 weight a quantity of cement. Blast furnace slag ggbs has been used as a supplementary material along with the cement. Cem iggbs concrete when compared with tarmac bulk portland cement concrete at the same cement content has the following properties. Experimental study on geopolymer concrete incorporating ggbs v.
The top countries of suppliers are india, china, and vietnam, from which the percentage of ggbs cement supply is 4%, 88%, and 5% respectively. Therefore, is an urgent need to reduce the usage of cement. The use of fibre reinforcement concrete provides the ductility and toughness required for higher strength. Kanta rao abstract the major problem the world is facing today is the environmental pollution. Regen ground granulated blast furnace slag ggbs is a cement substitute, manufactured from a byproduct of the ironmaking industry. Is ggbs a good partial replacement for cement in concrete mix. Ggbs is a vitrified substance which is a byproduct of iron production in a blast furnace.
Experimental study on geopolymer concrete incorporating ggbs. Slag cement can therefore be substituted for opc in a wide range of equal mass replacement ratios. 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. Effect of cementitious waste material ggbs on concrete as a replacement in cement quaid joharbhattiwala kuldeep dabhekar m. When ggbs is mixed with ordinary cement you get ggbs low carbon cement. Cement producers will typically build up inventories during the winter and then ship themduring the summer figure 15.
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