{"id":88538,"date":"2025-06-01T07:14:12","date_gmt":"2025-06-01T07:14:12","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88538"},"modified":"2025-06-01T07:14:12","modified_gmt":"2025-06-01T07:14:12","slug":"the-raw-materials-used-for-the-manufacture-of-portland-cement-are","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-raw-materials-used-for-the-manufacture-of-portland-cement-are\/","title":{"rendered":"The raw materials used for the manufacture of Portland cement are"},"content":{"rendered":"

The raw materials used for the manufacture of Portland cement are<\/p>\n

[amp_mcq option1=”Lime, silica and sulphur dioxide” option2=”Lime, silica and carbon dioxide” option3=”Lime, silica and alumina” option4=”Lime, silica and boric acid” correct=”option3″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-2 – 2019<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe primary raw materials used for the manufacture of Portland cement clinker are calcium oxide (usually derived from limestone or chalk), silicon dioxide (silica, typically from clay or sand), and aluminium oxide (alumina, from clay or bauxite). These materials are mixed in specific proportions, heated in a kiln to high temperatures (calcination and clinkering), and then ground to produce cement. Option C lists lime, silica, and alumina, which are the essential components derived from these raw materials.
\n<\/section>\n
\n– The main chemical components of Portland cement are calcium silicates, calcium aluminates, and calcium ferroaluminates.
\n– These compounds are formed by heating a mixture of calcareous material (like limestone, source of CaO) and argillaceous material (like clay, source of SiO2 and Al2O3) in a kiln.
\n– Minor components like iron oxide and gypsum (added during grinding) are also involved but lime, silica, and alumina are the core raw material oxides.
\n<\/section>\n
\n– Limestone (CaCO3) is heated to produce lime (CaO) and carbon dioxide (CO2).
\n– Clay provides silica (SiO2), alumina (Al2O3), and iron(III) oxide (Fe2O3).
\n– Sulphur dioxide and boric acid are not standard raw materials for Portland cement. Carbon dioxide is a byproduct of the calcination process, not a raw material that is added.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

The raw materials used for the manufacture of Portland cement are [amp_mcq option1=”Lime, silica and sulphur dioxide” option2=”Lime, silica and carbon dioxide” option3=”Lime, silica and alumina” option4=”Lime, silica and boric acid” correct=”option3″] This question was previously asked in UPSC NDA-2 – 2019 Download PDFAttempt Online The primary raw materials used for the manufacture of Portland … <\/p>\n

Detailed SolutionThe raw materials used for the manufacture of Portland cement are<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1094],"tags":[1119,1096,1239],"class_list":["post-88538","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1119","tag-chemistry","tag-inorganic-chemistry","no-featured-image-padding"],"yoast_head":"\nThe raw materials used for the manufacture of Portland cement are<\/title>\n<meta name=\"description\" content=\"The primary raw materials used for the manufacture of Portland cement clinker are calcium oxide (usually derived from limestone or chalk), silicon dioxide (silica, typically from clay or sand), and aluminium oxide (alumina, from clay or bauxite). These materials are mixed in specific proportions, heated in a kiln to high temperatures (calcination and clinkering), and then ground to produce cement. Option C lists lime, silica, and alumina, which are the essential components derived from these raw materials. - The main chemical components of Portland cement are calcium silicates, calcium aluminates, and calcium ferroaluminates. - These compounds are formed by heating a mixture of calcareous material (like limestone, source of CaO) and argillaceous material (like clay, source of SiO2 and Al2O3) in a kiln. - Minor components like iron oxide and gypsum (added during grinding) are also involved but lime, silica, and alumina are the core raw material oxides.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/the-raw-materials-used-for-the-manufacture-of-portland-cement-are\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The raw materials used for the manufacture of Portland cement are\" \/>\n<meta property=\"og:description\" content=\"The primary raw materials used for the manufacture of Portland cement clinker are calcium oxide (usually derived from limestone or chalk), silicon dioxide (silica, typically from clay or sand), and aluminium oxide (alumina, from clay or bauxite). These materials are mixed in specific proportions, heated in a kiln to high temperatures (calcination and clinkering), and then ground to produce cement. Option C lists lime, silica, and alumina, which are the essential components derived from these raw materials. - The main chemical components of Portland cement are calcium silicates, calcium aluminates, and calcium ferroaluminates. - These compounds are formed by heating a mixture of calcareous material (like limestone, source of CaO) and argillaceous material (like clay, source of SiO2 and Al2O3) in a kiln. - Minor components like iron oxide and gypsum (added during grinding) are also involved but lime, silica, and alumina are the core raw material oxides.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/the-raw-materials-used-for-the-manufacture-of-portland-cement-are\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:14:12+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"The raw materials used for the manufacture of Portland cement are","description":"The primary raw materials used for the manufacture of Portland cement clinker are calcium oxide (usually derived from limestone or chalk), silicon dioxide (silica, typically from clay or sand), and aluminium oxide (alumina, from clay or bauxite). These materials are mixed in specific proportions, heated in a kiln to high temperatures (calcination and clinkering), and then ground to produce cement. Option C lists lime, silica, and alumina, which are the essential components derived from these raw materials. - The main chemical components of Portland cement are calcium silicates, calcium aluminates, and calcium ferroaluminates. - These compounds are formed by heating a mixture of calcareous material (like limestone, source of CaO) and argillaceous material (like clay, source of SiO2 and Al2O3) in a kiln. - Minor components like iron oxide and gypsum (added during grinding) are also involved but lime, silica, and alumina are the core raw material oxides.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/the-raw-materials-used-for-the-manufacture-of-portland-cement-are\/","og_locale":"en_US","og_type":"article","og_title":"The raw materials used for the manufacture of Portland cement are","og_description":"The primary raw materials used for the manufacture of Portland cement clinker are calcium oxide (usually derived from limestone or chalk), silicon dioxide (silica, typically from clay or sand), and aluminium oxide (alumina, from clay or bauxite). These materials are mixed in specific proportions, heated in a kiln to high temperatures (calcination and clinkering), and then ground to produce cement. Option C lists lime, silica, and alumina, which are the essential components derived from these raw materials. - The main chemical components of Portland cement are calcium silicates, calcium aluminates, and calcium ferroaluminates. - These compounds are formed by heating a mixture of calcareous material (like limestone, source of CaO) and argillaceous material (like clay, source of SiO2 and Al2O3) in a kiln. - Minor components like iron oxide and gypsum (added during grinding) are also involved but lime, silica, and alumina are the core raw material oxides.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/the-raw-materials-used-for-the-manufacture-of-portland-cement-are\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T07:14:12+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/the-raw-materials-used-for-the-manufacture-of-portland-cement-are\/","url":"https:\/\/exam.pscnotes.com\/mcq\/the-raw-materials-used-for-the-manufacture-of-portland-cement-are\/","name":"The raw materials used for the manufacture of Portland cement are","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T07:14:12+00:00","dateModified":"2025-06-01T07:14:12+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The primary raw materials used for the manufacture of Portland cement clinker are calcium oxide (usually derived from limestone or chalk), silicon dioxide (silica, typically from clay or sand), and aluminium oxide (alumina, from clay or bauxite). These materials are mixed in specific proportions, heated in a kiln to high temperatures (calcination and clinkering), and then ground to produce cement. Option C lists lime, silica, and alumina, which are the essential components derived from these raw materials. - The main chemical components of Portland cement are calcium silicates, calcium aluminates, and calcium ferroaluminates. - These compounds are formed by heating a mixture of calcareous material (like limestone, source of CaO) and argillaceous material (like clay, source of SiO2 and Al2O3) in a kiln. - Minor components like iron oxide and gypsum (added during grinding) are also involved but lime, silica, and alumina are the core raw material oxides.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/the-raw-materials-used-for-the-manufacture-of-portland-cement-are\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/the-raw-materials-used-for-the-manufacture-of-portland-cement-are\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/the-raw-materials-used-for-the-manufacture-of-portland-cement-are\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC NDA-2","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-nda-2\/"},{"@type":"ListItem","position":3,"name":"The raw materials used for the manufacture of Portland cement are"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/88538","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=88538"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/88538\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=88538"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=88538"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=88538"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}