Microstructural and Phase Characteristics of Phosphogypsum-Cement Mixtures
The effects of the tricalcium aluminate (C 3 A) content of the stabilizing cement [Type II (1.3% C 3 A) cement and Type III cement (9.3% C 3 A)], curing time (seven to 90 days), proportion of PG (5-60%), grain size, and impurities in phosphogypsum (PG) (PG compared to gypsum) on the microstructural...
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| Veröffentlicht in: | Journal of materials in civil engineering 1996-02, Vol.8 (1), p.11-18 |
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| creator | Roy, Amitava Kalvakaalava, Ramesh Seals, Roger K |
| description | The effects of the tricalcium aluminate (C 3
A) content of the stabilizing cement [Type II (1.3% C 3
A) cement and Type III cement (9.3% C 3
A)], curing time (seven to 90 days), proportion of PG (5-60%), grain size, and impurities in phosphogypsum (PG) (PG compared to gypsum) on the microstructural (by scanning electron microscopy) and phase properties of gypsum PG and cement mixtures, a potential road-base material, were studied (by derivative thermogravimetry). Morphologically, two types of ettringite (well-defined crystals,
>2 m in lengths and ill-defined crystals, below 1 m in length) were present in the cement and gypsum PG mixtures. The impurities in PG retarded the initial hydration of cement in direct proportion to its amount in the mixtures. However, gypsum PG increased the degree of hydration of cement in the mixtures in the long term. The reacted gypsum PG produced a large amount of ettringite (within two months) compared to cement only. The amount of carbonation was uniformly low. |
| doi_str_mv | 10.1061/(ASCE)0899-1561(1996)8:1(11) |
| format | Article |
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A) content of the stabilizing cement [Type II (1.3% C 3
A) cement and Type III cement (9.3% C 3
A)], curing time (seven to 90 days), proportion of PG (5-60%), grain size, and impurities in phosphogypsum (PG) (PG compared to gypsum) on the microstructural (by scanning electron microscopy) and phase properties of gypsum PG and cement mixtures, a potential road-base material, were studied (by derivative thermogravimetry). Morphologically, two types of ettringite (well-defined crystals,
>2 m in lengths and ill-defined crystals, below 1 m in length) were present in the cement and gypsum PG mixtures. The impurities in PG retarded the initial hydration of cement in direct proportion to its amount in the mixtures. However, gypsum PG increased the degree of hydration of cement in the mixtures in the long term. The reacted gypsum PG produced a large amount of ettringite (within two months) compared to cement only. The amount of carbonation was uniformly low.</description><identifier>ISSN: 0899-1561</identifier><identifier>EISSN: 1943-5533</identifier><identifier>DOI: 10.1061/(ASCE)0899-1561(1996)8:1(11)</identifier><language>eng</language><publisher>Reston, VA: American Society of Civil Engineers</publisher><subject>Applied sciences ; Buildings. Public works ; Cement concrete constituents ; Cements ; Exact sciences and technology ; Materials ; Properties and test methods ; Properties of anhydrous and hydrated cement, test methods ; TECHNICAL PAPERS</subject><ispartof>Journal of materials in civil engineering, 1996-02, Vol.8 (1), p.11-18</ispartof><rights>Copyright © 1996 American Society of Civil Engineers</rights><rights>1996 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a400t-d59b73317acdc95bf1ca0623b6d46c8871b5e0e03cb17ffea7c6d1255498ccf03</citedby><cites>FETCH-LOGICAL-a400t-d59b73317acdc95bf1ca0623b6d46c8871b5e0e03cb17ffea7c6d1255498ccf03</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttp://ascelibrary.org/doi/pdf/10.1061/(ASCE)0899-1561(1996)8:1(11)$$EPDF$$P50$$Gasce$$H</linktopdf><linktohtml>$$Uhttp://ascelibrary.org/doi/abs/10.1061/(ASCE)0899-1561(1996)8:1(11)$$EHTML$$P50$$Gasce$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,76193,76201</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=2974123$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Roy, Amitava</creatorcontrib><creatorcontrib>Kalvakaalava, Ramesh</creatorcontrib><creatorcontrib>Seals, Roger K</creatorcontrib><title>Microstructural and Phase Characteristics of Phosphogypsum-Cement Mixtures</title><title>Journal of materials in civil engineering</title><description>The effects of the tricalcium aluminate (C 3
A) content of the stabilizing cement [Type II (1.3% C 3
A) cement and Type III cement (9.3% C 3
A)], curing time (seven to 90 days), proportion of PG (5-60%), grain size, and impurities in phosphogypsum (PG) (PG compared to gypsum) on the microstructural (by scanning electron microscopy) and phase properties of gypsum PG and cement mixtures, a potential road-base material, were studied (by derivative thermogravimetry). Morphologically, two types of ettringite (well-defined crystals,
>2 m in lengths and ill-defined crystals, below 1 m in length) were present in the cement and gypsum PG mixtures. The impurities in PG retarded the initial hydration of cement in direct proportion to its amount in the mixtures. However, gypsum PG increased the degree of hydration of cement in the mixtures in the long term. The reacted gypsum PG produced a large amount of ettringite (within two months) compared to cement only. The amount of carbonation was uniformly low.</description><subject>Applied sciences</subject><subject>Buildings. Public works</subject><subject>Cement concrete constituents</subject><subject>Cements</subject><subject>Exact sciences and technology</subject><subject>Materials</subject><subject>Properties and test methods</subject><subject>Properties of anhydrous and hydrated cement, test methods</subject><subject>TECHNICAL PAPERS</subject><issn>0899-1561</issn><issn>1943-5533</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1996</creationdate><recordtype>article</recordtype><recordid>eNp9UE1PwzAMjRBIjMF_6GFC26EQN03bwGmqyse0CSTgHKVpyjr1i6SV2L8n3aod8cG25Gc_v4fQDPAd4ADu58uPOFngiDEXaABzYCxYRA-2gcUZmgDziUspIedocgJdoitjdhhjgn08QatNIXVjOt3LrteidESdOe9bYZQTb4UWslO6MF0hjdPkdtCYdtt871vTV26sKlV3zqb4tavKXKOLXJRG3Yx1ir6eks_4xV2_Pb_Gy7UrfIw7N6MsDQmBUMhMMprmIAUOPJIGmR_IKAohpQorTGQKYZ4rEcogA49Sn0VS5phM0e3xbqubn16ZjleFkaosRa2a3nAvABZafRb4eAQOCo1WOW91UQm954D5YCDng4F88IYP3vDBQB5x24Ddno00wkhR5lrUsjCnEx4LffAGklGlRSm-a3pdW_F8tYmTxH5hIzpkOCTAYzny_0P_B-upiYk</recordid><startdate>19960201</startdate><enddate>19960201</enddate><creator>Roy, Amitava</creator><creator>Kalvakaalava, Ramesh</creator><creator>Seals, Roger K</creator><general>American Society of Civil Engineers</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope></search><sort><creationdate>19960201</creationdate><title>Microstructural and Phase Characteristics of Phosphogypsum-Cement Mixtures</title><author>Roy, Amitava ; Kalvakaalava, Ramesh ; Seals, Roger K</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a400t-d59b73317acdc95bf1ca0623b6d46c8871b5e0e03cb17ffea7c6d1255498ccf03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1996</creationdate><topic>Applied sciences</topic><topic>Buildings. Public works</topic><topic>Cement concrete constituents</topic><topic>Cements</topic><topic>Exact sciences and technology</topic><topic>Materials</topic><topic>Properties and test methods</topic><topic>Properties of anhydrous and hydrated cement, test methods</topic><topic>TECHNICAL PAPERS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Roy, Amitava</creatorcontrib><creatorcontrib>Kalvakaalava, Ramesh</creatorcontrib><creatorcontrib>Seals, Roger K</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Journal of materials in civil engineering</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Roy, Amitava</au><au>Kalvakaalava, Ramesh</au><au>Seals, Roger K</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Microstructural and Phase Characteristics of Phosphogypsum-Cement Mixtures</atitle><jtitle>Journal of materials in civil engineering</jtitle><date>1996-02-01</date><risdate>1996</risdate><volume>8</volume><issue>1</issue><spage>11</spage><epage>18</epage><pages>11-18</pages><issn>0899-1561</issn><eissn>1943-5533</eissn><abstract>The effects of the tricalcium aluminate (C 3
A) content of the stabilizing cement [Type II (1.3% C 3
A) cement and Type III cement (9.3% C 3
A)], curing time (seven to 90 days), proportion of PG (5-60%), grain size, and impurities in phosphogypsum (PG) (PG compared to gypsum) on the microstructural (by scanning electron microscopy) and phase properties of gypsum PG and cement mixtures, a potential road-base material, were studied (by derivative thermogravimetry). Morphologically, two types of ettringite (well-defined crystals,
>2 m in lengths and ill-defined crystals, below 1 m in length) were present in the cement and gypsum PG mixtures. The impurities in PG retarded the initial hydration of cement in direct proportion to its amount in the mixtures. However, gypsum PG increased the degree of hydration of cement in the mixtures in the long term. The reacted gypsum PG produced a large amount of ettringite (within two months) compared to cement only. The amount of carbonation was uniformly low.</abstract><cop>Reston, VA</cop><pub>American Society of Civil Engineers</pub><doi>10.1061/(ASCE)0899-1561(1996)8:1(11)</doi><tpages>8</tpages></addata></record> |
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| identifier | ISSN: 0899-1561 |
| ispartof | Journal of materials in civil engineering, 1996-02, Vol.8 (1), p.11-18 |
| issn | 0899-1561 1943-5533 |
| language | eng |
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| source | American Society of Civil Engineers:NESLI2:Journals:2014 |
| subjects | Applied sciences Buildings. Public works Cement concrete constituents Cements Exact sciences and technology Materials Properties and test methods Properties of anhydrous and hydrated cement, test methods TECHNICAL PAPERS |
| title | Microstructural and Phase Characteristics of Phosphogypsum-Cement Mixtures |
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