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