Delayed ettringite formation in concrete jochen stark, katrin bollmann bauhausuniversity weimar germany 1. What is maximum content of ggbs in concrete mix design. As per is codes what is the maximum ggbs content i can add into concrete as a replacement of cement. 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. This paper presents a laboratory investigation on optimum level of ground granulated blastfurnace slag ggbs on the compressive strength of concrete. Ggbs ground granulated blastfurnace slag is perfect for use in concrete applications and large pours. Abstract concrete is a brittle material when it undergoes heavy loads, cracks will. Ground granulated blast furnace slag ggbs1 is a by product from the blast furnaces used to make iron. Partial replacement of cement with ggbs in concrete. High strength concrete incorporating ground granulated blast furnace slag and steel fibres. The strength of concrete tested on the cylinder at 28 days curing.
A typical combination is 50% ggbs with 50% portland cement, 4but percentages of ggbs anywhere between 20 and 80 % are commonly used. Ground granulated blast furnace slag in concrete and its. Tech scholar professor department of civil engineering. Properties of fresh concrete with ground granulated blast. 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%.
Partial replacement of cement with ggbs in self compacting concrete for sustainable construction j. Kanta rao abstract the major problem the world is facing today is the environmental pollution. Strength and corrosion resistance properties of ggbs concrete containing quarry dust as fine aggregate. Effects of domestic rawsewage on mechanical properties of. Ecoplus concrete mix with 70% regen ggbs was used in the turbine bases at the clyde wind farm adding sustainability and durability.
Water in ggbs concrete takes slightly longer to combine chemically to form hydration products, thus making ggbs concrete a little more sensitive to poor curing. Effect of ggbs and nano silica on the durability properties of. High strength concrete incorporating ground granulated. Pdf concrete is probably the most extensively used construction material in the world with about six billion tones being produced every year. Ggbs, a cement replacement, manufactured from a byproduct of the ironmaking industry. Pdf high strength concrete using ground granulated blast. Ground granulated blast furnace slag ggbs the chemical composition of ggbs contributes to the production of superior cement concrete. Another major hurdle of extensive use of ggbs concrete lies in the little source of supply of ggbs. Ground granulated blast furnace slag ggbs is byproduct from the blastfurnaces of iron and steel industries. Experimental study on partial replacement of cement by flyash and ggbs syed asif ali1 professor shaik abdullah2 1p. Composition, specifications and conformity criteria for common cements ggbs.
Effects of ground granulated blast furnace slag in. G student structural engineering 2professor 1,2department of civil engineering. Strength and corrosion resistance properties of ggbs. Concrete is a mixture of cement, fine aggregate, coarse aggregate and water. Can i add ggbs beyond the limit specified in is code. Ground granulated blast furnace slag ggbs jsw cement.
Clyde wind farm, scotland the ecoplus range of high quality. Partial replacement of cement with ggbs in self compacting. Today, the industrial and agricultural waste by products such as ground granulated blast furnace slag ggbs, fly ash, rice husk ash, silica fume, etc. 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 mixes were made using ordinary portland cement with 15% replacing of silica fume and river sand by ggbsground. Gudadappanavar assistant professor department of civil. Concrete has capacity to enhance its properties with the help of other suitable constituents.
Murali krishnan2 1 assistant professor, 2 student, department of. Ggbs reduces the risk of sulfate attack on the concrete. Conditions to avoid ggbs should be stored enclosed such as a product. This research examined the properties of concrete containing grade 120 slag cement at. The use of ggbs in concrete has proved to improve certain properties, when. Dustproof goggles should be worn wherever there is a risk of ggbs powder or any ggbswater mixture entering the eye. Introduction the problem of durability of concrete with cement as binding material comes. Opc used with ggbs blend chemically binds the chlorides with slag hydrates effectively reducing the mobility of chlorides thereby reducing the reinforcement corrosion risk. High strength concrete using ground granulated blast furnace slag ggbs thavasumony d, thanappan subash, sheeba d. The rate of chloride transport by diffusion in concrete containing ground granulated blastfurnace slag ggbs was mathematically estimated to predict the corrosionfree service life of concrete structures. Blastfurnaces operate at temperatures of about 1,500c and are fed with a carefully controlled mixture of iron ore, coke and limestone. Concrete plays a vital role in the development of infrastructure viz. Replacing the portland cement by ggbs helps in reducing co emissions and.
Properties of concrete with ground granulated blast. Effects of ground granulated blast furnace slag in portland cement concrete pccwisconsin highway research program whrp 0701 irene k. What is the advantage of using ggbs as replacement of. Properties of concrete containing ground granulated blast. Pdf strength and durability studies on ggbs concrete. Effect of cementitious waste material ggbs on concrete as a replacement in cement quaid joharbhattiwala kuldeep dabhekar m. The influence of ground granulated blast furnace slag ggbfs on the characteristics of fresh concrete will let us know more about the working of ggbfs in a broader way. Department of civil, structural and environmental engineering. Split tensile strength of concrete tested on cylinders at different percentage of partial replacement of ggbs with sand in concrete.
Page 2 of 6 cementitious materials available for use in the uk are. Effects of ggbs on geotechnical properties of black cotton soil under the guidance of shri. With the addition of 40% of ggbs as a replacement of cement for an m25 grade of concrete, there is an increase in the strength compared to the normal concrete. Estimation of corrosionfree life for concrete containing. The carbonation of concrete decreases as the total. 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.
Performance of concrete by partial replacement of cement. Engineers to investigate an alternative to conventional concrete. Earlyage strength of ggbs concrete is lower than the normal pc concrete which limits its use in. Resistance to freeze and thaw of low strength concrete containing ggbs and. The main study of the objective to achieve information about effect of scms on concrete mixes. Embodied co e of uk cement, additions and cementitious. The carbonation of aircured concrete is higher than that of moistcured concrete, in which fa and ggbs concrete is more sensitive than pc concrete. Experimental study on geopolymer concrete incorporating ggbs. Effects of ground granulated blast furnace slag in portland cement. The ground granulated blast furnace slag ggbfs is a byproduct of iron manufacturing which when added to concrete improves its properties such as workability, strength and durability. 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.
An experimental study on optimum usage of ggbs for the. The cubes, cylinders and prisms are tested for compressive strength. Pdf earlyage heat development in ggbs concrete structures. Ground granulated blastfurnace slag ggbs to bs 6699 information contained in this data sheet is based on knowledge considered to be true and correct and is offered for the users. Experimental study on geopolymer concrete incorporating ggbs v. Ggbs ground granulated blastfurnace slag is a cementitious material whose main use is in concrete and is a byproduct from the blastfurnaces used to make iron. One such alternative is geopolymer concrete gpc, this concrete uses no portland cement, pozzalonic materials like fly ash and ggbs. Effect of ggbs and blast furnace slag sand and curing method on resistance to. Ggbs is a byproduct slag material from the iron and steel indust 7hb.
Effect of cementitious waste material ggbs on concrete. Ground granulated blastfurnace slag ggbs is the slag from iron producing blastfurnaces that is. Earlyage structural and thermal performance of ggbs concrete. It is found that, 25% of ggbs can be replaced and strength obtained is comparable to the conventional concrete. Ggbs, which is a byproduct of the manufacturing of iron in the blast furnace, can partially replace cement in concrete. Blast furnace slag, ground to an appropriate fineness, can be used as a partial replacement of cementitious material in concrete. Ggbs has a low reactivity and does not react under normal storage and use conditions. 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. 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. Pdf china accounts for approximately half of global steel production and more than 80 mt of blastfurnace slag is generated every year as a. Experimental study on partial replacement of cement by.