{"id":88050,"date":"2025-06-01T07:00:27","date_gmt":"2025-06-01T07:00:27","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88050"},"modified":"2025-06-01T07:00:27","modified_gmt":"2025-06-01T07:00:27","slug":"which-among-the-following-are-essential-constituents-of-portland-cemen","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-among-the-following-are-essential-constituents-of-portland-cemen\/","title":{"rendered":"Which among the following are essential constituents of Portland cemen"},"content":{"rendered":"

Which among the following are essential constituents of Portland cement ?<\/p>\n

[amp_mcq option1=”Sand, lime, clay” option2=”Silica, alumina, lime” option3=”Silica, lime, graphite powder” option4=”Sand, graphene, clay” correct=”option2″]<\/p>\n

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This question was previously asked in<\/div>\n
UPSC NDA-1 – 2024<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nPortland cement is primarily made from materials containing calcium oxide (lime), silicon dioxide (silica), aluminum oxide (alumina), and iron oxide. The main raw materials are typically limestone (for lime) and clay or shale (for silica, alumina, and iron). These materials are heated in a kiln to produce clinker, which is then ground into fine powder with a small amount of gypsum added. Option B lists Silica, Alumina, and Lime, which are the essential oxide components derived from these raw materials, forming the bulk of the cement clinker.
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\nThe major chemical components of Portland cement clinker are tricalcium silicate (alite), dicalcium silicate (belite), tricalcium aluminate (celite), and tetracalcium aluminoferrite (ferrite). These are formed from the reaction of lime (CaO), silica (SiO2), alumina (Al2O3), and iron oxide (Fe2O3) during calcination.
\n<\/section>\n
\nSand is commonly used as an aggregate in concrete (a mixture of cement, aggregates, and water), but it is not a constituent of cement itself. Graphite powder and graphene are forms of carbon and are not standard components of Portland cement. Clay is a raw material containing silica and alumina, used in cement production, but the essential *constituents* within the clinker are the oxides (silica, alumina, lime, etc.) derived from the raw materials.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which among the following are essential constituents of Portland cement ? [amp_mcq option1=”Sand, lime, clay” option2=”Silica, alumina, lime” option3=”Silica, lime, graphite powder” option4=”Sand, graphene, clay” correct=”option2″] This question was previously asked in UPSC NDA-1 – 2024 Download PDFAttempt Online Portland cement is primarily made from materials containing calcium oxide (lime), silicon dioxide (silica), aluminum oxide … <\/p>\n

Detailed SolutionWhich among the following are essential constituents of Portland cemen<\/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":[1093],"tags":[1103,1096,1239],"class_list":["post-88050","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1103","tag-chemistry","tag-inorganic-chemistry","no-featured-image-padding"],"yoast_head":"\nWhich among the following are essential constituents of Portland cemen<\/title>\n<meta name=\"description\" content=\"Portland cement is primarily made from materials containing calcium oxide (lime), silicon dioxide (silica), aluminum oxide (alumina), and iron oxide. The main raw materials are typically limestone (for lime) and clay or shale (for silica, alumina, and iron). These materials are heated in a kiln to produce clinker, which is then ground into fine powder with a small amount of gypsum added. Option B lists Silica, Alumina, and Lime, which are the essential oxide components derived from these raw materials, forming the bulk of the cement clinker. The major chemical components of Portland cement clinker are tricalcium silicate (alite), dicalcium silicate (belite), tricalcium aluminate (celite), and tetracalcium aluminoferrite (ferrite). These are formed from the reaction of lime (CaO), silica (SiO2), alumina (Al2O3), and iron oxide (Fe2O3) during calcination.\" \/>\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\/which-among-the-following-are-essential-constituents-of-portland-cemen\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which among the following are essential constituents of Portland cemen\" \/>\n<meta property=\"og:description\" content=\"Portland cement is primarily made from materials containing calcium oxide (lime), silicon dioxide (silica), aluminum oxide (alumina), and iron oxide. The main raw materials are typically limestone (for lime) and clay or shale (for silica, alumina, and iron). These materials are heated in a kiln to produce clinker, which is then ground into fine powder with a small amount of gypsum added. Option B lists Silica, Alumina, and Lime, which are the essential oxide components derived from these raw materials, forming the bulk of the cement clinker. The major chemical components of Portland cement clinker are tricalcium silicate (alite), dicalcium silicate (belite), tricalcium aluminate (celite), and tetracalcium aluminoferrite (ferrite). These are formed from the reaction of lime (CaO), silica (SiO2), alumina (Al2O3), and iron oxide (Fe2O3) during calcination.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-among-the-following-are-essential-constituents-of-portland-cemen\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:00:27+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":"Which among the following are essential constituents of Portland cemen","description":"Portland cement is primarily made from materials containing calcium oxide (lime), silicon dioxide (silica), aluminum oxide (alumina), and iron oxide. The main raw materials are typically limestone (for lime) and clay or shale (for silica, alumina, and iron). These materials are heated in a kiln to produce clinker, which is then ground into fine powder with a small amount of gypsum added. Option B lists Silica, Alumina, and Lime, which are the essential oxide components derived from these raw materials, forming the bulk of the cement clinker. The major chemical components of Portland cement clinker are tricalcium silicate (alite), dicalcium silicate (belite), tricalcium aluminate (celite), and tetracalcium aluminoferrite (ferrite). These are formed from the reaction of lime (CaO), silica (SiO2), alumina (Al2O3), and iron oxide (Fe2O3) during calcination.","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\/which-among-the-following-are-essential-constituents-of-portland-cemen\/","og_locale":"en_US","og_type":"article","og_title":"Which among the following are essential constituents of Portland cemen","og_description":"Portland cement is primarily made from materials containing calcium oxide (lime), silicon dioxide (silica), aluminum oxide (alumina), and iron oxide. The main raw materials are typically limestone (for lime) and clay or shale (for silica, alumina, and iron). These materials are heated in a kiln to produce clinker, which is then ground into fine powder with a small amount of gypsum added. Option B lists Silica, Alumina, and Lime, which are the essential oxide components derived from these raw materials, forming the bulk of the cement clinker. The major chemical components of Portland cement clinker are tricalcium silicate (alite), dicalcium silicate (belite), tricalcium aluminate (celite), and tetracalcium aluminoferrite (ferrite). These are formed from the reaction of lime (CaO), silica (SiO2), alumina (Al2O3), and iron oxide (Fe2O3) during calcination.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-among-the-following-are-essential-constituents-of-portland-cemen\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T07:00:27+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\/which-among-the-following-are-essential-constituents-of-portland-cemen\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-among-the-following-are-essential-constituents-of-portland-cemen\/","name":"Which among the following are essential constituents of Portland cemen","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T07:00:27+00:00","dateModified":"2025-06-01T07:00:27+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Portland cement is primarily made from materials containing calcium oxide (lime), silicon dioxide (silica), aluminum oxide (alumina), and iron oxide. 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These are formed from the reaction of lime (CaO), silica (SiO2), alumina (Al2O3), and iron oxide (Fe2O3) during calcination.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-among-the-following-are-essential-constituents-of-portland-cemen\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-among-the-following-are-essential-constituents-of-portland-cemen\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-among-the-following-are-essential-constituents-of-portland-cemen\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC NDA-1","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-nda-1\/"},{"@type":"ListItem","position":3,"name":"Which among the following are essential constituents of Portland cemen"}]},{"@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\/88050","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=88050"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/88050\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=88050"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=88050"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=88050"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}