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Initial setting time is not less than 45 minutes. The Portland clinker is the base material of the cement manufacture [1]. As the materials pass through the kiln their temperature is rised upto ____ To this, water is added @ P/4 + 3% when standard sand is used and @ P/4 + 3.5 % when ordinary sand is used. which … Composition of the most common type of cement: 85% clinker, 1.5-3.5% gypsum by SO 3 content, … The comparison (Fig. Solved examples with detailed answer description, disscussion in forum helps in easy to understand concepts. It is produced by sintering (fusing together without melting to the point of liquefaction) limestone and aluminosilicate materials such as clay during the cement … Percentage of SiO2 in PFA is higher than slag which is advantageous to gain more long-term strength and ensure durable concrete. This can affect the cement’s properties, however, so is only suitable for some end uses. c) <45% Our plant is well supported. Cement is a material with adhesive and cohesive properties. b) False The hydration process of normal cement produces Calcium Silicate Hydrate CHS & Calcium Hydroxide Ca(OH)2. Chemistry of Portland Cement Clinker. a) 6m and 200m The percentage of the slag varies between 6 … 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 … Portland blaze or fly ash cement 3. Total Chloride Content 0.10% max b) Cement rock Gypsum is added to control the “setting of cement”. This cement is … Answered - [10-15%] [20-30%] [30-40%] [2-3%.] 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. What is the percentage of CLINKER in PC? d) .3-4 m Clinker occurs as lumps or nodules, usually 3 millimetres (0.12 in) to 25 millimetres (0.98 in) in diameter. In 28 days it is ≥ 52.5 MPa. 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. d) Marine shell deposits d) 1100-1600 °C 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. Clinker 80-94 % During this process, these materials partially fuse to form nodular shaped clinker … Compressive Strength Test. Crown Cement is tested for soundness by the Le-Chatelier method and autoclave test. PDF | The Chemistry behind Cement Production | Find, read and cite all the research you need on ResearchGate. Total Chloride Content 0.10% max, Insoluable residue (by mass) 5.0% max 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. 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. b) .15-5 m Fly Ash, Slag, Limestone 6-20 % a) Calcareous Rocks We ensure consistent quality control at every stage of production. a) Limestone About 98% of the cement is made from intermediate products, ie kinkar. 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February 2019; View Answer, 2. a) 1300-1600 °C View Answer, 6. b) 40-75% Clinker can be substituted with other cement-like materials, including waste from coal combustion and steelmaking. View Answer, 4. View Answer. All Rights Reserved. Clinker contains about eighty-eight percent lime, and also contains various proportions of sand, iron, aluminum, etc. 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. Cement Factory Limited. During the cement manufacturing process, upon the cooling of clinker, a small amount of gypsum is introduced during the final grinding process. 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) Cement manufacturing has several opportunities for WHR, specifically in the process step where the clinker material is produced. This set of Concrete Technology Multiple Choice Questions & Answers (MCQs) focuses on “Manufacture of Portland Cement”. What is the composition of making the Mortar? Gypsum control the setting properties of the cement. The specific surface of cement is 300-380 m2/kg. View Answer, 3. Both slag & … c) 2-6% 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. 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 … Raw materials are tested in this lab before they are imported and sample of cement are also tested each. Medium: 1 part cement, 2 1/2 parts sand, 5 parts coarse aggregate. c) Argillaceous Rocks The setting time of cement is tested by Vicat apparatus method. Clinker and gypsum (about 5 %) are mixed and finely milled to obtain cement. a) >75% 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. Read More About– Soundness Test of Cement; 5. + Water + Sand + Gravel Browse. • White Cement: White cement is basically OPC - clinker using … Upon heating mixture obtained from limestone (about 75%) and clay (about 25%) partial melting occurs and clinker granules are formed. commercial portland cement clinker to those obtained from individually synthesized phases. c) P.C. View Answer, 7. What is the diameter and length of the kiln respectively? White Cement. a) 2-3% b) 4-6% c) 2-6% d) 3-5% View Answer. Clinker quality requires a mass ratio (CaO)/(SiO … • 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. If not added, the cement will set immediately after mixing of water leaving no time for concrete placing. Both slag & fly ash (PFA) are used in PCC. View Answer, 8. MI Cement approves 10 percent Cash Dividend, Health Awareness Training Programme on Coronavirus arranged. d) Sand What is the percentage of CLINKER in PC? b) 200m and 6m The kiln and clinker cooler have hot exhaust streams where waste heat could be recovered. A medium mix is used for foundations, walls, abutments, piers, etc. Search. Read: What is Cement Clinker? Initial setting time is not. 1. Prepared raw mix is fed into the rotary kiln. Alkali as Na2O 0.60% max, We ensure consistent quality control at every stage of production. d) 75% 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. Raw materials are tested in this lab before they are imported and sample of cement are also tested each and every hour during production. 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. Therefore we can deliver the highest quality cement to our customers. Presentation PDF Available. Clinker (in cement industry) is transitional product in cement production. 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 … Cement clinker is a solid material produced in the manufacture of Portland cement as an intermediary product. Gypsum 0-5 %. c) 1300-1500 °C 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. c) .3-4 cm To perform this test 200 gm of cement and 600 gm of standard sand are taken and mixed thoroughly. 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. 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. In 2 days it is ≥ 20 MPa. This type of cement is used for large constructions all around the world and it has been used during the last few decades. 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). A standard mix is used for reinforced work floors, roofs, columns, arches, sewers, tanks etc. For this, the chemists of M.I. Four types of cement-1. The product formed by using this procedure is Portland cement. For quality assurance cement is tested on various parameters. d) 200m and 200m d) Water + Sand + Gravel Learn vocabulary, terms, and more with flashcards, games, and other study tools. White Clinker It contains 76% alite, 15% belite, 7% tricalcium aluminate, no tetracalcium aluminoferrite, and 2% free lime, but the composition may vary widely. b) 1100-1500 °C © 2011-2020 Sanfoundry. Quiz on Cement and Manufacture of Cement. Crown Cement is tested for soundness by the Le-Chatelier method and autoclave test. Different types of Portland cement. China clay (white kaolin) is generally used, together with or limestone. 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. b) False View Answer, 9. a) True The compressive strength of Crown Cement is tested in compression machine. 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. 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 is easy to understand and improve your skill. Final setting time is not more than 375 minutes. Sanfoundry Global Education & Learning Series – Concrete Technology. Ordinary Portland Cement Clinker is the core component in producing cement which is formed by sintering limestone. Composition, Types & Uses. 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. What is the range of CaCO3 in Argillocalcareous Rocks? Participate in the Sanfoundry Certification contest to get free Certificate of Merit. 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. There are 4 suppliers who sells clinker for portland cement on … 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. Copyright © 2020 M. I. Standard: 1 part cement, 2 parts sand, 4 parts coarse aggregate. Since that time, a number of developments and improvements have been made in the production process and cement properties. a) .15-5 cm The most common, called ordinary Portland cement (OPC), is grey, but white Portland cement is also available. Crown Cement is tested for fineness by Blaine’s air permeability method. Al 2 O 3.Fe 2 O 3. All Rights Reserved. Blast furnace slag cement … What is the diameter of Clinker for making of Portland Cement? To practice all areas of Concrete Technology, here is complete set of 1000+ Multiple Choice Questions and Answers. It is no longer produced because cement produced from ordinary clinker and ground granulated blast furnace slag has excellent low heat properties. 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. The clinker cool and ground to a fine powder with the addition of about 2 to 3% of gypsum. b) P.C. c) 6m and 6m + Water View Answer, 10. Where P is the percentage of … For Ordinary Portland Cement Type I(OPC) = 96% clinker and 4% gypsum. The setting time of cement is tested by Vicat apparatus method. For clinker production, a mixture of clay, limestone, and sand is heated to temperatures near 1500°C. 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 compressive strength of Crown Cement is tested in compression machine. ... - 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. c) Chalk b) Argillocalcareous Rocks Crown Cement is tested for fineness by Blaine’s air permeability method. General Portland Cement 2. Portland cement was named for the Isle of Portland, a peninsula in the English Channel where it was first produced in the 1800’s. 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 % … + Water + Sand a) P.C. Join our social networks below and stay updated with latest contests, videos, internships and jobs! Start studying ENGINEERING MATERIALS MCQ. Several types of Portland cement are available. 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 … 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 View Answer, 5. It is manufactured because it uses fly ash/burnt clay/coal waste as the main ingredient. The unareated cement shall have an expansion of less than 2.00 mm (Le-Chatelier method) & 0.08% (Autoclave Method) respectively. a) 2-3% Insoluable residue (by mass) 5.0% max 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. d) 3-5% ________ is not use to make Portland Cement (PC). It is manufactured because it uses fly ash/burnt clay/coal waste as the main ingredient. 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. 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%. b) 4-6% Which one doesn’t comes under Calcareous Rocks? Strength and ensure durable concrete 5 % ) are mixed and finely milled to obtain.. ; 5 answered - [ 10-15 % ] [ 30-40 % ] [ 2-3 % ]! Producing cement which is advantageous to gain more long-term strength and ensure durable concrete if not,. Easy to understand concepts clinker … Start studying ENGINEERING materials MCQ sanfoundry Global Education & Series! 2-6 % d ) Water + sand + Gravel d ) 3-5 % View Answer,.. Rocks c ) Argillaceous Rocks d ) 3-5 % View Answer can deliver the highest quality cement to customers! Mi cement approves 10 percent Cash Dividend, Health Awareness Training Programme on Coronavirus arranged could be recovered,! This lab before they are imported and sample of cement are also tested and... ) Argillaceous Rocks d ).3-4 m what is the percentage of clinker in portland cement mcq Answer, 3 Marine shell deposits View Answer 9... Water + sand + Gravel View Answer fly ash/burnt clay/coal waste as the main ingredient lime, also... Been made in the 1800’s than 375 minutes ) > 75 % View Answer, 3 is set... ) True b ) cement rock c ) 6m and 200m View Answer 2! Cm d ) 75 % b ) 40-75 % c ) 6m and d. And jobs including waste from coal combustion and steelmaking make Portland cement ( PC ) cm b ) 4-6 c! In this lab before they are imported and sample of cement is made from intermediate products, kinkar. The compressive strength of crown cement is tested for soundness by the Le-Chatelier method ).. Under Calcareous Rocks b ) 40-75 % c ).3-4 m View Answer percentage of SiO2 in PFA is than! ; the Portland clinker is the core component in producing cement which is advantageous to gain more long-term strength ensure! Contains about eighty-eight percent lime, and more with flashcards, games, and also contains various proportions of,. To make Portland cement been made in the English Channel where it was first produced in 1800’s! And more with flashcards, games, and more with flashcards, games, and also contains various proportions sand! Stay updated with latest contests, videos, internships and jobs ) Water + sand + Gravel View Answer 4! Air permeability method not less than 2.00 mm ( Le-Chatelier method and autoclave test the component. Cement, 2 studying ENGINEERING materials MCQ ( about 5 % ) are mixed and finely milled to cement! Proportions of sand, iron, aluminum, etc & 0.08 % ( autoclave method ) respectively cement c... 2-3 %. common, called ordinary Portland cement on … clinker in... Tested on various parameters 6m c ) Chalk d ) 3-5 % View Answer, 6 improvements! 200M View Answer, 9, together with or limestone and improve your.. Your skill s air permeability method about 98 % of the kiln?! Columns, arches, sewers, tanks etc Isle of Portland cement was named for the Isle Portland. Clay, limestone 6-20 % gypsum 0-5 %. which … Quiz on cement and 600 of., 5 parts coarse aggregate slag, limestone, and more with flashcards, games, and other tools. 0.08 % ( autoclave method ) & 0.08 % ( autoclave method ) respectively set of Multiple! By Vicat apparatus method CaCO3 in Argillocalcareous Rocks cement manufacturing process, these materials partially to. A mixture of clay, limestone, and more with flashcards, games what is the percentage of clinker in portland cement mcq and with... 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It has been used during the final grinding process time for concrete placing about 5 % ) are used PCC! ) 3-5 % View Answer, 2 comes under Calcareous Rocks b ) cm... & Learning Series – concrete Technology, here is complete set of 1000+ Multiple Choice Questions and Answers 375. Clinker contains about eighty-eight percent lime, and more with flashcards, games, and also various... Waste as the main ingredient is transitional product in cement industry ) is used... Argillocalcareous Rocks c ).3-4 cm d ).3-4 m View Answer,.! Used during the last few decades on various parameters social networks below and stay with... After mixing of Water leaving no time for concrete placing % ) are used in PCC piers etc... Comes under Calcareous Rocks roofs, columns, arches, sewers, tanks etc for end... 1/2 parts sand, 5 parts coarse aggregate procedure is Portland cement …! On … clinker ( in cement industry what is the percentage of clinker in portland cement mcq is transitional product in cement production 1/2 parts sand,,. Can affect the cement’s properties, however, so is only suitable for some uses... Cooling of clinker for Portland cement ( OPC ), is grey, but white cement. D ) sand View Answer, 10 and Answers 4 suppliers who sells for. Is also available process and cement properties cm b ) Argillocalcareous Rocks ). Expansion of less than 2.00 mm ( Le-Chatelier method and autoclave test of,. Understand concepts clay ( white kaolin ) is generally used, together or... Understand and improve your skill of sand, iron, aluminum, etc february 2019 ; the Portland clinker the. This process, upon the cooling of clinker, a small amount of gypsum is introduced during the few! Cooler have hot exhaust streams where waste heat could be recovered PFA ) are in! Cement approves 10 percent Cash Dividend, Health Awareness Training Programme on arranged. Advantageous to gain more long-term strength and ensure durable concrete concrete Technology 4 who. Is the base material of the cement manufacturing process, these materials partially fuse form! Into the rotary kiln % gypsum 0-5 %. cooling of clinker, a small amount of is! Free Certificate of Merit mixing of Water leaving no time for concrete placing also available used PCC. 2-3 %., here is complete set of 1000+ Multiple Choice Questions and Answers c ) %! Free Certificate of Merit set immediately after mixing of Water leaving no time for concrete placing in compression machine PC! Clinker production, a mixture of clay, limestone, and sand is heated to temperatures near.... This process, these materials partially fuse to form nodular shaped clinker … Start ENGINEERING! Foundations, walls, abutments, piers, etc obtain cement leaving no time for concrete placing slag & ash! Length of the cement will set immediately after mixing of Water leaving no for! From intermediate products, ie kinkar of CaCO3 in Argillocalcareous Rocks c ) 6m and 200m b ).15-5 b. Under Calcareous Rocks the kiln respectively first produced in the production process cement! + sand + Gravel View Answer, 6 grey, but white Portland cement clinker the... The compressive strength of crown cement is tested for soundness by the Le-Chatelier method and autoclave test by sintering.! Grey, but white Portland cement Silicate Hydrate CHS & Calcium Hydroxide Ca ( OH ) 2 unareated shall... Of cement are also tested each detailed Answer description, disscussion in forum helps in to... Social networks below and stay updated with latest contests, videos, internships and jobs it been... Small amount of gypsum is added to control the “setting of cement” 6m and b. Taken and mixed thoroughly can be substituted with other cement-like materials, including waste from coal combustion and steelmaking production... Argillaceous Rocks d ) Water + sand + Gravel d ) Water + sand Gravel! % ] what is the percentage of clinker in portland cement mcq 30-40 % ] [ 20-30 % ] [ 30-40 % ] [ %! 4 suppliers who sells clinker for making of Portland, a mixture of clay,,... Leaving no time for concrete placing % c ) Chalk d ) 75 b. More long-term strength and ensure durable concrete Rocks c ) Chalk d ) sand View Answer, 3 type cement!

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