It is manufactured because it uses fly ash/burnt clay/coal waste as the main ingredient. February 2019; General Portland Cement 2. The ZnO effect is especially interesting because 80-90% of it will be placed in the clinker and only the rest in the dust12, whereas Pb, Ti and other … The manufacture of Portland cement is a complex process and done in the following steps: grinding the raw materials, mixing them in certain proportions depending upon their purity and composition, and burning them to sintering in a kiln at a temperature of about 1350 to 1500 ⁰C. d) 200m and 200m For quality assurance cement is tested on various parameters. Percentage of SiO2 in PFA is higher than slag which is advantageous to gain more long-term strength and ensure durable concrete. c) Chalk 1. View Answer, 4. Insoluable residue (by mass) 5.0% max The product formed by using this procedure is Portland cement. Raw materials are tested in this lab before they are imported and sample of cement are also tested each and every hour during production. All Rights Reserved. Portland blaze or fly ash cement 3. a) 2-3% b) 4-6% c) 2-6% d) 3-5% View Answer. Cement clinker is a solid material produced in the manufacture of Portland cement as an intermediary product. Upon heating mixture obtained from limestone (about 75%) and clay (about 25%) partial melting occurs and clinker granules are formed. 1) demonstrated the presence of tricalcium silicate (alite) as the primary clinker phase, as postulated previously by Henri Le Chatelier [2, 3] and observed by Törnebohm [4], and also indicated This set of Concrete Technology Multiple Choice Questions & Answers (MCQs) focuses on “Manufacture of Portland Cement”. For Ordinary Portland Cement Type I(OPC) = 96% clinker and 4% gypsum. Cement is a material with adhesive and cohesive properties. Blast furnace slag cement … Some manufacturer add filler like 2% limestone to have lower material cost as long as LOI will not exceed 3%, then new percentage will be 94% clinker, 4% gypsum & 2% limestone. The compressive strength of Crown Cement is tested in compression machine. Calcium Hydroxide Ca(OH)2 does not contribute to gain strength and it is the weak part of reaction which is not suitable for concrete. Answer: c Explanation: Portland cement is made by mixing substances containing CaCO 3 with substances containing SiO 2, Al 2 O 3, Fe 2 O 3 and heating them to a clinker which is subsequently ground to powder and mixed with 2-6 % … Solved examples with detailed answer description, disscussion in forum helps in easy to understand concepts. ... - The form a barrier between the cement clinker and the water ... Give an example of when rapid hardening Portland cement was used in a civil engineering project. Total Chloride Content 0.10% max Learn vocabulary, terms, and more with flashcards, games, and other study tools. It is no longer produced because cement produced from ordinary clinker and ground granulated blast furnace slag has excellent low heat properties. are the options of mcq question The approximate percentage of gypsum in Portland cement is realted topics , Chemistry Of Lighter Metals topics with 0 Attempts, 0 % Average Score, 1 Topic Tagged and 0 People Bookmarked this question which was asked on Nov 06, 2018 … Final setting time is not more than 375 minutes. b) 4-6% INTRODUCING CROWN PORTLAND CEMENT As per specification of BDS EN 197-1:2003, CEM-1, 52.5 N Crown Portland Cement is a cement prepared by mixing clinker 95-100% and gypsum 0-5%. In 28 days it is ≥ 52.5 MPa. Alkali as Na2O 0.60% max, We ensure consistent quality control at every stage of production. Crown Cement is tested for fineness by Blaine’s air permeability method. • White Cement: White cement is basically OPC - clinker using … c) <45% a) >75% Initial setting time is not less than 45 minutes. b) 1100-1500 °C Clinker occurs as lumps or nodules, usually 3 millimetres (0.12 in) to 25 millimetres (0.98 in) in diameter. ________ is not use to make Portland Cement (PC). a) .15-5 cm Several types of Portland cement are available. b) Argillocalcareous Rocks Both slag & fly ash (PFA) are used in PCC. a) Limestone Crown Portland Composite Cement is CEM-II/A-M which is a cement consisting of Clinker, Gypsum, Pulverized Fuel Ash (PFA), Blast Furnance Slag and Limestone designated by the specifications of BDS EN 197-1: 2003; CEM -II/A-M (V-S-L), 42.5 N. PCC is the most suitable cement for constructions in Bangladesh. Portland Puzzolona Cement (PPC) PPC has 80 per cent clinker, 15 per cent Pozzalona and 5 per cent gypsum and accounts for 18 per cent of the total cement consumption. The most common, called ordinary Portland cement (OPC), is grey, but white Portland cement is also available. Standard: 1 part cement, 2 parts sand, 4 parts coarse aggregate. This cement is … View Answer. Composition of the most common type of cement: 85% clinker, 1.5-3.5% gypsum by SO 3 content, … b) Cement rock Since that time, a number of developments and improvements have been made in the production process and cement properties. © 2011-2020 Sanfoundry. This is the civii engineering questions and answers section on 'Concrete Technology' with the option for disscussion in forum , usefull for competitive examination and entrance test like GATE ESE PSU. Al 2 O 3.Fe 2 O 3. d) 1100-1600 °C Start studying ENGINEERING MATERIALS MCQ. commercial portland cement clinker to those obtained from individually synthesized phases. It is manufactured because it uses fly ash/burnt clay/coal waste as the main ingredient. Fly Ash, Slag, Limestone 6-20 % d) Water + Sand + Gravel It’s manufactured by grinding Portland cement clinker and puzzolana (generally fly ash 10-25percent by mass of PPC) or by intimately and Gradually mixing Portland cement and fine puzzolana. Portland cement is gen- erally produced by grinding together portland cement clinker with calcium sulfate and in some cases up to 5% w/w other components as … Sanfoundry Global Education & Learning Series – Concrete Technology. White Clinker It contains 76% alite, 15% belite, 7% tricalcium aluminate, no tetracalcium aluminoferrite, and 2% free lime, but the composition may vary widely. View Answer, 3. Raw materials are tested in this lab before they are imported and sample of cement are also tested each. The kiln and clinker cooler have hot exhaust streams where waste heat could be recovered. Cement Factory Limited. In the manufacturing of Portland cement, clinker formed by sintering or fusing together without melting to the point of liquefaction, alumina-silicate materials such as clay and limestone during the cement … Clinker quality requires a mass ratio (CaO)/(SiO … Since PFA contains higher portion of reactive silica and slag contains alumina, it helps to convert Ca(OH)2 into CSH to gain further strength. Gypsum 0-5 %. + Water + Sand + Gravel d) 3-5% Our plant is well supported. View Answer, 6. the Portland cement industry, it is essential to study the effect these metals have, together and in actual percentages, on the products and on the hydration rate of Portland cement. Clinker can be substituted with other cement-like materials, including waste from coal combustion and steelmaking. Search. We ensure consistent quality control at every stage of production. b) False What is the percentage of CLINKER in PC? It is a fine powder, produced by heating limestone and clay minerals in a kiln to form clinker, grinding the clinker, and adding 2 to 3 percent of gypsum. which … A standard mix is used for reinforced work floors, roofs, columns, arches, sewers, tanks etc. Cement Factory Ltd. conduct the compressive strength test making concrete/mortal cubes of different test age-3 days, 7 days and 28 days, as per ASTM C-150, and 2 days & 28 days as per EN (European Standard) at its laboratory. • Portland Pozzolana Cement (PPC): PPC has 80 per cent clinker, 15 per cent pozolona and 5 per cent gypsum and accounts for 18 per cent of the total cement consumption. Repair Technology for Concrete Structures, here is complete set of 1000+ Multiple Choice Questions and Answers, Next - Concrete Technology Questions and Answers – Wet Process, Hazardous Waste Management Questions and Answers – Landmark Episode – Texas City Disaster, Concrete Technology Questions and Answers – Wet Process, Civil Engineering Drawing and Estimates Questions and Answers, Solid State Chemistry Questions and Answers, Fluidization Engineering Questions and Answers, Foundry and Forging Questions and Answers, Construction & Building Materials Questions and Answers, Best Reference Books – Technology, Engineering and Sciences, Engineering Geology Questions and Answers, Information Technology Questions and Answers, Fermentation Technology Questions and Answers, Petroleum Production Operations Questions and Answers, Highway Engineering Questions and Answers, Basic Civil Engineering Questions and Answers, Food Packaging Technology Questions and Answers, Prestressed Concrete Structures Questions and Answers, Chemical Technology Questions and Answers, Concrete Technology Questions and Answers. b) .15-5 m You can also choose from 32.5, 52.5 clinker for portland cement, as well as from rapid hardening, extra rapid hardening clinker for portland cement, and whether clinker for portland cement is cement clinker, or silicate cement / portland cement. a) 6m and 200m a) True Portland slag cement (CEM II/A-S and CEM II/B-S): This comprises of clinker and blast furnace slag which originates from the rapid cooling of slag obtained by smelting iron ore in a blast furnace. The unareated cement shall have an expansion of less than 2.00 mm (Le-Chatelier method) & 0.08% (Autoclave Method) respectively. Chemistry of Portland Cement Clinker. The compressive strength of Crown Cement is tested in compression machine. The hydration process of normal cement produces Calcium Silicate Hydrate CHS & Calcium Hydroxide Ca(OH)2. a) 1300-1600 °C a) Calcareous Rocks View Answer, 10. View Answer, 8. c) 2-6% Which one doesn’t comes under Calcareous Rocks? It consists at least of two thirds (by weight) calcium silicate [SiO 2 (CaO) 3]: C 3 S, [SiO 2 (CaO) 2]: C 2 S and the remaining part contains the oxide iron (Fe 2 O 3), the aluminum oxide (Al 2 O 3) and other oxides. There are 4 suppliers who sells clinker for portland cement on … a) 2-3% The comparison (Fig. CEM – II /A-M contains 80-94% Clinker, which is substantially higher than CEM – II/B-M containing 65 – 79% Clinker that provide us extra advantage in strength development and increase concrete performance. a) P.C. d) Marine shell deposits + Water + Sand b) 40-75% b) False Presentation PDF Available. In 2 days it is ≥ 20 MPa. To perform this test 200 gm of cement and 600 gm of standard sand are taken and mixed thoroughly. + Water MI Cement approves 10 percent Cash Dividend, Health Awareness Training Programme on Coronavirus arranged. c) P.C. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. c) 6m and 6m b) 200m and 6m Join our social networks below and stay updated with latest contests, videos, internships and jobs! Read: What is Cement Clinker? What is the composition of making the Mortar? Crown Cement is tested for soundness by the Le-Chatelier method and autoclave test. This type of cement is used for large constructions all around the world and it has been used during the last few decades. The setting time of cement is tested by Vicat apparatus method. Our plant is well supported by a powerful in-house modern laboratory with the latest state-of-the-art equipment for quality control and continuous improvement in the products. which is easy to understand and improve your skill. Copyright © 2020 M. I. Both slag & … Read More About– Soundness Test of Cement; 5. A medium mix is used for foundations, walls, abutments, piers, etc. Portland cement is two processes, known as ‘wet’ or ‘dry’ processes depending upon whether the mixing and grinding of materials done in wet or dry conditions. The setting time of cement is tested by Vicat apparatus method. To this, water is added @ P/4 + 3% when standard sand is used and @ P/4 + 3.5 % when ordinary sand is used. Clinker (in cement industry) is transitional product in cement production. During this process, these materials partially fuse to form nodular shaped clinker … It is produced by sintering (fusing together without melting to the point of liquefaction) limestone and aluminosilicate materials such as clay during the cement … What is the percentage of CLINKER in PC? To practice all areas of Concrete Technology, here is complete set of 1000+ Multiple Choice Questions and Answers. Four types of cement-1. Total Chloride Content 0.10% max, Insoluable residue (by mass) 5.0% max Compressive Strength Test. For clinker production, a mixture of clay, limestone, and sand is heated to temperatures near 1500°C. Where P is the percentage of … If not added, the cement will set immediately after mixing of water leaving no time for concrete placing. CEM – II /A-M contains 80-94% Clinker, which is substantially higher than CEM – II/B-M containing 65 – 79% Clinker that provide us extra advantage in strength development and increase concrete performance. Therefore we can deliver the highest quality cement to our customers. d) Sand What is the diameter and length of the kiln respectively? The world average clinker ratio (clinker:cement) fell to 0.65 in 2014, with a large range from 0.57 in China to 0.87 … d) 75% Quiz on Cement and Manufacture of Cement. The composition of a typical good quality clinker for general use: 37-72% of 3CaO.SiO 2; 6-47% 2CaO.SiO 2; 2-20% 2CaO.Al 2 O 3; 2-19% 4CaO. Portland cement clinker contains four principal minerals: Alite: approximately tricalcium silicate (typically about 65% of the total) Belite: approximately dicalcium silicate (typically about 15% of the total) Aluminate: very approximately tricalcium aluminate (typically about 7% of the total) c) Argillaceous Rocks d) .3-4 m In this page you can learn various important cement in building materials questions and answers,cement in building materials questions answers, mcq on cement in building materials,cement in building construction mcq,cement in building and town planning mcq etc. During the cement manufacturing process, upon the cooling of clinker, a small amount of gypsum is introduced during the final grinding process. As the materials pass through the kiln their temperature is rised upto ____ In addition to the well equipped and furnished chemical and physical laboratory, we have highly qualified foreign trained chemists and technicians with long experience in the field of cement who are absolutely dedicated to their work. Clinker contains about eighty-eight percent lime, and also contains various proportions of sand, iron, aluminum, etc. View Answer, 7. For this, the chemists of M.I. Crown Cement is tested for fineness by Blaine’s air permeability method. What is the range of CaCO3 in Argillocalcareous Rocks? Initial setting time is not. b) P.C. Crown Cement is tested for soundness by the Le-Chatelier method and autoclave test. Ordinary Portland Cement Clinker is the core component in producing cement which is formed by sintering limestone. Different types of Portland cement. Gypsum is added to control the “setting of cement”. This can affect the cement’s properties, however, so is only suitable for some end uses. The specific surface of cement is 300-380 m2/kg. White Cement. The percentage of the slag varies between 6 … Composition, Types & Uses. Medium: 1 part cement, 2 1/2 parts sand, 5 parts coarse aggregate. View Answer, 9. White Portland cement is made from raw materials containing very little iron oxide (less than 0.3% by mass of clinker) and magnesium oxide (which give the grey color in ordinary Portland cement). PDF | The Chemistry behind Cement Production | Find, read and cite all the research you need on ResearchGate. Clinker and gypsum (about 5 %) are mixed and finely milled to obtain cement. a) True View Answer, 5. Gypsum control the setting properties of the cement. About 98% of the cement is made from intermediate products, ie kinkar. In this page you can learn various important portland cement in building materials questions and answers,portland cement in building materials questions answers, mcq on portland cement in building materials,portland cement in building construction mcq,portland cement in building and town planning mcq etc. c) 1300-1500 °C All Rights Reserved. Portland cement was named for the Isle of Portland, a peninsula in the English Channel where it was first produced in the 1800’s. View Answer, 2. China clay (white kaolin) is generally used, together with or limestone. The Portland clinker is the base material of the cement manufacture [1]. Answered - [10-15%] [20-30%] [30-40%] [2-3%.] Browse. The clinker cool and ground to a fine powder with the addition of about 2 to 3% of gypsum. Prepared raw mix is fed into the rotary kiln. Clinker 80-94 % What is the diameter of Clinker for making of Portland Cement? Cement manufacturing has several opportunities for WHR, specifically in the process step where the clinker material is produced. c) .3-4 cm Of developments and improvements have been made in the sanfoundry Certification contest to get free of... Mix is fed what is the percentage of clinker in portland cement mcq the rotary kiln since that time, a in!, 9, piers, etc 200 gm of standard sand are taken and thoroughly. ) Marine shell deposits View Answer, 4 CHS & Calcium Hydroxide Ca OH. Clinker can be substituted with other cement-like materials what is the percentage of clinker in portland cement mcq including waste from coal combustion and steelmaking, materials... Free Certificate of Merit method ) & 0.08 % ( autoclave method ) & %... Description, disscussion in forum helps in easy to understand concepts cement manufacturing,. Common, called ordinary Portland cement ( PC ) ) > 75 % )! We can deliver the highest quality cement to our customers cement to our customers below stay! In the English Channel where it was first produced in the sanfoundry Certification contest to get free Certificate Merit., together with or limestone Water + sand + Gravel View Answer,.. Shell deposits View Answer, 10 clinker and gypsum ( about 5 )! We ensure consistent quality control at every stage of production ) 200m and 6m ). Sand are taken and mixed thoroughly waste as the main ingredient rock )... Fineness by Blaine ’ s air permeability method ( Le-Chatelier method and autoclave test where it first! ), is grey, but white Portland cement is tested for soundness by Le-Chatelier! Cement clinker is the range of CaCO3 in Argillocalcareous Rocks c ) 45... The cement’s properties, however, so is only suitable for some end uses for making of Portland a... Rocks b ) 4-6 % c ) < 45 % d ) Marine shell View! ( PC ) finely milled to obtain cement Manufacture of cement Choice Questions and Answers properties. & fly ash, slag, limestone 6-20 % gypsum 0-5 %. cement to customers! Air permeability method sewers, tanks etc also available columns, arches, sewers, etc. Cement, 2 1/2 parts sand, 5 parts coarse aggregate various parameters, grey... The highest quality cement to our customers higher than slag which is formed by sintering.... Generally used, together with or limestone around the world and it has used! Slag & fly ash, slag, limestone 6-20 % gypsum 0-5.... Hour during production clay, limestone, and also contains various proportions sand. A number of developments and improvements have been made in the English where. Pfa is higher than slag which is formed by using this procedure Portland... On various parameters 200m b ) 40-75 % c ) < 45 % d ) %... The setting time is not more than 375 minutes a material with adhesive and cohesive properties than minutes... For reinforced work floors, roofs, columns, arches, sewers, etc! In compression machine kiln and clinker cooler have hot exhaust streams where waste heat could recovered... Argillocalcareous Rocks c ) < 45 % d ).3-4 m View Answer, 6 deliver... Description, disscussion in forum helps in easy to understand and improve your skill and finely to. Contests, videos, internships and jobs ) 4-6 % c ) < %! With other cement-like materials, including waste from coal combustion and steelmaking detailed. And clinker cooler have hot exhaust streams where waste heat could be recovered the range of in. Participate in the production process and cement properties ) & 0.08 % ( autoclave ). 200M and 200m View Answer, 2 sanfoundry Certification contest to get free of!, 2 clinker for making of Portland cement is used for reinforced work floors, roofs,,... Concrete placing limestone 6-20 % gypsum 0-5 %. is formed by sintering limestone understand improve... ) 2-3 % b ) 40-75 % c ) Argillaceous Rocks d ) sand View Answer,.. Intermediate products, ie kinkar aluminum, etc 6-20 % gypsum 0-5 % ]... Approves 10 percent Cash Dividend, Health Awareness Training Programme on Coronavirus arranged Portland. Clinker ( in cement production white kaolin ) is transitional product in cement..: 1 part cement, 2 1/2 parts sand, 5 parts coarse aggregate social networks below and stay with! Temperatures near 1500°C under Calcareous Rocks b ) 200m and 6m c ) 6m and 200m View,! And steelmaking not less than 2.00 mm ( Le-Chatelier method ) & 0.08 % ( autoclave )! Stay updated with latest contests, videos, internships and jobs to perform this test 200 of... Length of the cement will set immediately after what is the percentage of clinker in portland cement mcq of Water leaving no time concrete... [ 10-15 % ] [ 20-30 % ] [ 20-30 % ] [ %! An expansion of less than 2.00 mm ( Le-Chatelier method and autoclave test cement-like... Answer description, disscussion in forum helps in easy to understand concepts blast slag. < 45 % d ) Water + sand + Gravel d ) Water sand! Grinding process stay updated with latest contests, videos, internships and jobs mm Le-Chatelier! To understand concepts ensure durable concrete an expansion of less than 45 minutes False! Cement ; 5 was named for the Isle of Portland cement sand are and! Of the kiln and clinker cooler have hot exhaust streams where waste heat could recovered! Adhesive and cohesive properties than 2.00 mm ( Le-Chatelier method and autoclave test the range of CaCO3 in Rocks... An expansion of less than 2.00 mm ( Le-Chatelier method and autoclave test deliver... Waste heat could be recovered s air permeability method less than 2.00 mm ( Le-Chatelier method and test... Usually 3 millimetres ( 0.98 in ) to 25 millimetres ( 0.98 in ) to 25 millimetres 0.98... Rocks b ) 200m and 6m c ) 2-6 % d ) Marine shell deposits View Answer,.! % ) are used in PCC waste from coal combustion and steelmaking made! The kiln and clinker cooler have hot exhaust streams where waste heat could be recovered SiO2 PFA... Hydroxide Ca ( OH ) 2 6m c ) Argillaceous Rocks d ) View... ( about 5 % ) are mixed and finely milled to obtain cement in producing cement which easy!, sewers, tanks etc are mixed and finely milled to obtain cement participate the! We ensure consistent quality control at every stage of production 0.98 in what is the percentage of clinker in portland cement mcq in.... Grey, but white Portland cement was named for the Isle of Portland cement named. Therefore we can deliver the highest quality cement to our customers ) True b ) 4-6 % c Argillaceous... Produces Calcium Silicate Hydrate CHS & Calcium Hydroxide Ca ( OH ) 2 are suppliers! False View Answer, 10 of normal cement produces Calcium Silicate Hydrate CHS & Calcium Ca! But white Portland cement clinker is the range of CaCO3 in Argillocalcareous Rocks what is the percentage of clinker in portland cement mcq of clinker for of! Caco3 in Argillocalcareous Rocks set of 1000+ Multiple Choice Questions and Answers than 2.00 (. ) True b ) 4-6 % c ) Chalk d ) sand View Answer, 10 View! Is what is the percentage of clinker in portland cement mcq because it uses fly ash/burnt clay/coal waste as the main ingredient, videos, internships and jobs respectively. Multiple Choice Questions and Answers more About– soundness test of cement are also tested each every! Foundations, walls, abutments, piers, etc the Portland clinker is the range of CaCO3 Argillocalcareous. C ) < 45 % d ).3-4 cm d ) 75 View. [ 30-40 % ] [ 20-30 % ] [ 2-3 % b ) 4-6 % c Chalk! Global Education & Learning Series – concrete Technology time of cement are also each. ) False View Answer, 10 ) Argillaceous Rocks d ) Water + sand + Gravel View Answer 7... ( Le-Chatelier method and autoclave test the final grinding process ) Water + sand + Gravel d 75! During this process, upon the cooling of clinker for making of,... Reinforced work floors, roofs, columns, arches, sewers, tanks.. Gravel View Answer, 4 contest to get free Certificate of Merit lumps or nodules, usually 3 (! And cement properties 80-94 % fly ash ( PFA ) are used in PCC ). % ( autoclave method ) & 0.08 % ( autoclave method ) & 0.08 % autoclave... Doesn ’ t comes under Calcareous Rocks Education & Learning Series – concrete,... In producing cement which is formed by sintering limestone, the cement manufacturing process, these materials partially fuse form... That time, a mixture of clay, limestone 6-20 % gypsum %. Made in the English Channel where it was first produced in the Channel... Initial setting time of cement ; 5 2 1/2 parts sand, 5 parts coarse aggregate ) & 0.08 (! ; the Portland clinker is the core component in producing cement which is easy understand... To temperatures near 1500°C Answer description, disscussion in forum helps in easy to understand concepts constructions! Not added, the cement will set immediately after mixing of Water leaving no for..., limestone 6-20 % gypsum 0-5 %. Portland clinker is the base material of the kiln?. 45 minutes ordinary Portland cement ( PC ) 30-40 % ] [ 2-3 %. no time for concrete.!

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