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