Today, in the European cement regulations, there are fourteen types of cement containing blast furnace slag. This specification covers three strength grades of finely ground granulated blast-furnace slag (Grades 80, 100, and 120) for use as a cementitious material in concrete and mortars. Choose the correct answer from the following MCQ. 12. Furnace cementis perfect for sealing between your firebricks, sealing the collar to the top of your wood stove, or to bond and seal metal to metal or metal to masonry joints less than 1/8". 7 Kg. where form work is to be removed as early as possible, The cement, widely used in retaining walls, is, Blast furnace slag cement concrete requires. Abstract-The Iron industries produce a huge quantity of blast furnace slag as by–product, which is a non–biodegradable waste material from that only a small percentage of it is used by cement industries to manufacture cement. Low heat cement contains more lime than ordinary Portland cement. Previous Advertisement. Uses of Blast-Furnace Slag Cement. Which of the following cements is expected to have the highest compressive strength after 3 days. In the production of ready-mixed concrete or site-batched durable concrete. The tetra calcium alumino ferrite has poor cementing value. VI. While there are many applications and benefits of slag cement, a few are highlighted below and detailed information sheets are located here. For every tonne of GGBS used in a concrete mix, the embodied CO 2 levels are reduced by around 900 kg compared to the use of one tonne of traditional Portland Cement. The slag shall contain no additions and shall conform to the sulfide sulfur and sulfate chemical composition requirement. Slag cement is commonly found in ready-mixed concrete, precast concrete, masonry, soil cement and high temperature resistant building products. ... blast furnace slag cement. slag cement, is made from iron blast-furnace slag; it is a nonmetallic hydraulic cement consisting essentially of sili-cates and aluminosilicates of calcium developed in a molten condition simultaneously with iron in a blast furnace. Slag aggregates produced by Tarmac are supplied as CE marked products under the Factory production control process of ISO 9001:2008 for the production of products to BS EN 12342 - Aggregates for Unbound and Hydraulically Bound Mixture, BS EN 13043 - Aggregates for … All Rights Reserved | Copyright | Terms of Use & Privacy Policy The Following Section consists of Multiple Choice Questions on Concrete Technology. The dicalcium silicate provides good ultimate strength to cement. The company says that it will use Suez Cement’s CEM III/A ground granulated blast furnace slag (GGBFS) cement to produce concrete for the 96km monorail network. Ordinary Portland cement should not be used for construction work exposed to sulphates in the soil. The main use of granulated blast furnace slag is cement production, but GBFS can also be used as any other additive to concrete or as part of alkali activated materials. 35 Kg. Slag. Portland Blast-Furnace Slag Cement UltraTech Premium. Q.5. Used for structures meant for water retaining such as retaining wall, rivers, ports, tunnels for improvement in impermeability. Sulphate resisting cement is particularly used for canal lining. Slag can be used in concrete either as a binder or as an aggregate. Quality assurance is an integral part of UltraTech's manufacturing … Concrete properties can be improved using Fine Blast Furnace Slag (BFS). Ground Granulated Blast Furnace Slag concrete. The raw materials are proportioned, mixed, and then burned in large rotary kilns at approximately 2500°F until partially fused into marble-sized masses known as clinker. 1234567891011121314151617Next, © 2012-2021 by GeekMCQ™ Technologies. Ground granulated blast-furnace slag, more commonly referred to as slag or slag cement, is a by-product of steel production. Slag from blast furnace contains (a) alumina (b) lime (c) silica (d) all these. Q.4. Used in mass concreting works such as dams, foundations which require low heat of hydration. In the present investigation Blast Furnace Slag from local industries has been utilised to find The sum of the percentage of tricalcium silicate and dicalcium silicate for Portland cement varies from. Ground Granulated Blast Furnace Slag (GGBS) is a cement substitute that improves durability and also the environmental credentials of concrete mixes. Using of blast … Blast furnace slag cement is used for [A]. civil engineering mcqs with answers on topic of concrete technology for interview, entrance test and competitive examination freely available to download for pdf export. Low heat cement should not be used for thin concrete structures. Ground-granulated blast-furnace slag (GGBS or GGBFS) is obtained by quenching molten iron slag (a by-product of iron and steel-making) 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 blast furnace slag is highly cementitious and high in CSH (calcium silicate hydrates) which is a strength enhancing … Blast furnace slag cement is used for: A. dams: B. bridge abutments: C. retaining walls: D. all of these View Answer Workspace Report Discuss in Forum. It is a by-product of the iron-making industry. dams [B]. For a structure subjected to the action of sea water, the cement used is, The strength of concrete using air entraining cement gets reduced by, Pezzolana is essentially a silicious material containing clay upto, In the manufacture of possolana cement, the amount of pozzolana material added to ordinary Portland cement clinkers is about. Four important methods for use of granulated slag, where it maintains its separate identity, and is a cementitious component, are: Ground glassy slag is mixed with hydrated lime as the activator; the glassy slag is ground with burned gypsum or anhydrite and small amounts of Portland cement or lime; ground glassy slag and Portland cement are combined in various proportions to form Portland blast-furnace … Concrete is the most commonly and widely used civil engineering material, so blast furnace slag applications are widely investigated with the goal of sustainable development and environmental preservation. Greater the percentage of GGBS, greater will be the effect of GGBS in concrete. develops high heat of hydration Which of the following statement is correct? 21 Kg. The concretes that contain blast furnace slag cement have less permeability, low hydration heat, better operability and processability, higher strength, and higher resistance to hazardous chemicals and hazardous attacks in many forms as compared to the common … What is GGBFS? Furnace Cement is a ready mix silicate cement that can withstand temperatures over 2000 degrees. Used in ready mix concrete plants. All Rights Reserved | Copyright | Terms of Use & Privacy Policy Contact us: info@geekmcq.com. For constructions meant for water retaining such as rivers, retaining wall, harbors, tunnels for improvement in impenetrability. But percentages of 20 to 80 are commonly used. Slag cement, often called ground granulated blast-furnace slag (GGBFS), is one of the most consistent cementitious materials used in concrete. The high total lime content, often over 40%, and the fact that much of this lime content is held by minerals that are reactive under soil conditions, allows some slags to be used as agricultural liming … bridge abutments [C]. When used as part of a portland cement concrete, slag reacts with both the water (latent hydraulic reaction) and the hydrated cement paste (pozzolanic reaction), resulting in a … In such cements GGBS content ranges typically from 30 to 70%. Portland blast furnace slag cement can be used (a) in under water structures (b) in structures in alkaline soils (c) in all places where ordinary Portland cement is used (d) all these. Test your knowledge about Civil Engineering – Concrete Technology by taking this Multi Choice Question (MCQ) quiz. UltraTech Premium is a concrete special cement, produced in UltraTech's state-of-the-art manufacturing facilities with carefully selected premium ingredients to deliver to the customer cement that produces both exceptionally strong as well as exceptionally durable concrete. While there are many applications and benefits of slag cement, a few are highlighted below and detailed information sheets are located here. Rapid hardening cement should not be used for massive concrete structures, The degree of grinding of cement is called. Civil Engineering MCQ on Concrete Technology 02. It is than dried and ground to fineness to be suitable for use as replacement part of cement in concrete manufacture or other applications. 5. civil engineering mcqs with answers on topic of concrete technology for interview, entrance test and competitive examination freely available to download for pdf export. Percentage of pozzolanic material containing clay upto … Figure 2: Comparison of blast furnace slag concrete compressive strength at 7days and 28 days with natural sand. Uses of Blast-Furnace Slag Cement In ready mix concrete plants. Ground Granulated Blast Furnace Slag is widely used in Europe, and finds increased usage in the United States and in Asia (particularly in Japan and Singapore) for its superiority in concrete durability - that extends the lifespan of buildings. It is actually a byproduct of iron production. From this study it is observed that Blast furnace slag can be used as an alternative to natural sand up to 60% and 75% in mortar and concrete respectively. The use of slag cement has demonstrated long-term performance enhancements allowing designers to reduce the … The fineness value of P.S.C, when tested by Blaine’s air permeability method, shall not be less than 225-280 m2/kg. In mass concreting works which require low heat of hydration such as foundations and dams. Which of the following statement is correct? The use of slag in replacing Portland cement by GGBFS is not very common. EduRev is like a wikipedia … Ground granulated blast-furnace slag (GGBFS) Our slag cement CEMSlag TM is a hydraulic cement material created when granulated blast-furnace slag from the steel manufacturing process is ground … CONCLUSIONS 1. GGBS is used to make durable concrete structures in … has less early strength [C]. Producers. © 2012-2021 by GeekMCQ™ Technologies. Suez Cement said, “CEM III/A cement is highly recommended when building thick concrete supports and massive structures because its hydration temperature of less than 210kJ/kg reduces cracking compared with … Ultimate strength to cement works which require low heat cement contains more lime than blast furnace slag cement is used for mcq cement. P.S.C, when tested by Blaine ’ s air permeability method, shall not be used in concrete alumina b! 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