A review of cement-superplasticizer interactions and their models
This paper presents a focused review of cement–superplasticizer interactions. It has been concluded from the survey of the literature that cement–superplasticizer interactions are generally preceded by the adsorption of superplasticizers on the hydrating cement particles. However, the mechanisms of...
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| Veröffentlicht in: | Advances in cement research 2000-10, Vol.12 (4), p.153-161 |
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| container_title | Advances in cement research |
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| creator | MOLLAH, M. Y. A ADAMS, W. J SCHENNACH, R COCKE, D. L |
| description | This paper presents a focused review of cement–superplasticizer interactions. It has been concluded from the survey of the literature that cement–superplasticizer interactions are generally preceded by the adsorption of superplasticizers on the hydrating cement particles. However, the mechanisms of such adsorptive interactions have not been adequately addressed experimentally or discussed in the literature. The reason for this appears to be the lack of a conceptual model that can delineate the results to date and project needed experiments. A charge-controlled-reaction mechanism model involving Ca
2+
ions from initial hydration is proposed to explain the adsorption characteristics of superplasticizers and other organic additives and their effects. The calcium ions released by hydration form a bilayer immediately upon contact of water with the cement, which is followed by adsorption of superplasticizer anions on the Ca
2+
ion side of the bilayer. The interfacial structures and their influence on electrical characteristics, hydration reactions and phase growth in the hydrating cement are discussed in terms of the proposed model. |
| doi_str_mv | 10.1680/adcr.2000.12.4.153 |
| format | Article |
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2+
ions from initial hydration is proposed to explain the adsorption characteristics of superplasticizers and other organic additives and their effects. The calcium ions released by hydration form a bilayer immediately upon contact of water with the cement, which is followed by adsorption of superplasticizer anions on the Ca
2+
ion side of the bilayer. The interfacial structures and their influence on electrical characteristics, hydration reactions and phase growth in the hydrating cement are discussed in terms of the proposed model.</description><identifier>ISSN: 0951-7197</identifier><identifier>EISSN: 1751-7605</identifier><identifier>DOI: 10.1680/adcr.2000.12.4.153</identifier><language>eng</language><publisher>London: Telford</publisher><subject>Admixtures for concrete, mortar and grouts ; Applied sciences ; Buildings. Public works ; Cement concrete constituents ; Cements ; Concretes. Mortars. Grouts ; Exact sciences and technology ; Hydration ; Materials ; Properties of anhydrous and hydrated cement, test methods</subject><ispartof>Advances in cement research, 2000-10, Vol.12 (4), p.153-161</ispartof><rights>2000 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c305t-dfc0b6440ed1de37acf47f36e43484d384568d83044b7f568f17c29299d75a453</citedby><cites>FETCH-LOGICAL-c305t-dfc0b6440ed1de37acf47f36e43484d384568d83044b7f568f17c29299d75a453</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,781,785,27929,27930</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=1486640$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>MOLLAH, M. Y. A</creatorcontrib><creatorcontrib>ADAMS, W. J</creatorcontrib><creatorcontrib>SCHENNACH, R</creatorcontrib><creatorcontrib>COCKE, D. L</creatorcontrib><title>A review of cement-superplasticizer interactions and their models</title><title>Advances in cement research</title><description>This paper presents a focused review of cement–superplasticizer interactions. It has been concluded from the survey of the literature that cement–superplasticizer interactions are generally preceded by the adsorption of superplasticizers on the hydrating cement particles. However, the mechanisms of such adsorptive interactions have not been adequately addressed experimentally or discussed in the literature. The reason for this appears to be the lack of a conceptual model that can delineate the results to date and project needed experiments. A charge-controlled-reaction mechanism model involving Ca
2+
ions from initial hydration is proposed to explain the adsorption characteristics of superplasticizers and other organic additives and their effects. The calcium ions released by hydration form a bilayer immediately upon contact of water with the cement, which is followed by adsorption of superplasticizer anions on the Ca
2+
ion side of the bilayer. The interfacial structures and their influence on electrical characteristics, hydration reactions and phase growth in the hydrating cement are discussed in terms of the proposed model.</description><subject>Admixtures for concrete, mortar and grouts</subject><subject>Applied sciences</subject><subject>Buildings. Public works</subject><subject>Cement concrete constituents</subject><subject>Cements</subject><subject>Concretes. Mortars. Grouts</subject><subject>Exact sciences and technology</subject><subject>Hydration</subject><subject>Materials</subject><subject>Properties of anhydrous and hydrated cement, test methods</subject><issn>0951-7197</issn><issn>1751-7605</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><recordid>eNpFkEtLxDAcxIMouK5-AU89iLfWvJqkx2XxBQte9ByyyT8Y6cskVfTT27ILnmYGZubwQ-ia4IoIhe-Ms7GiGM-RVrwiNTtBKyJrUkqB61O0ws3iSSPP0UVKHxgTKgVboc2miPAV4LsYfGGhgz6XaRohjq1JOdjwC7EIfYZobA5DnwrTuyK_Q4hFNzho0yU686ZNcHXUNXp7uH_dPpW7l8fn7WZXWobrXDpv8V5wjsERB0wa67n0TABnXHHHFK-FcophzvfSz94TaWlDm8bJ2vCardHt4XeMw-cEKesuJAtta3oYpqSplEQxquYiPRRtHFKK4PUYQ2fijyZYL7T0QksvtDShmuuZ1jy6Ob6bZE3ro-ltSP9LroTgmP0B0IJq3A</recordid><startdate>20001001</startdate><enddate>20001001</enddate><creator>MOLLAH, M. Y. A</creator><creator>ADAMS, W. J</creator><creator>SCHENNACH, R</creator><creator>COCKE, D. L</creator><general>Telford</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20001001</creationdate><title>A review of cement-superplasticizer interactions and their models</title><author>MOLLAH, M. Y. A ; ADAMS, W. J ; SCHENNACH, R ; COCKE, D. L</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c305t-dfc0b6440ed1de37acf47f36e43484d384568d83044b7f568f17c29299d75a453</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><topic>Admixtures for concrete, mortar and grouts</topic><topic>Applied sciences</topic><topic>Buildings. Public works</topic><topic>Cement concrete constituents</topic><topic>Cements</topic><topic>Concretes. Mortars. Grouts</topic><topic>Exact sciences and technology</topic><topic>Hydration</topic><topic>Materials</topic><topic>Properties of anhydrous and hydrated cement, test methods</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>MOLLAH, M. Y. A</creatorcontrib><creatorcontrib>ADAMS, W. J</creatorcontrib><creatorcontrib>SCHENNACH, R</creatorcontrib><creatorcontrib>COCKE, D. L</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Advances in cement research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>MOLLAH, M. Y. A</au><au>ADAMS, W. J</au><au>SCHENNACH, R</au><au>COCKE, D. L</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A review of cement-superplasticizer interactions and their models</atitle><jtitle>Advances in cement research</jtitle><date>2000-10-01</date><risdate>2000</risdate><volume>12</volume><issue>4</issue><spage>153</spage><epage>161</epage><pages>153-161</pages><issn>0951-7197</issn><eissn>1751-7605</eissn><abstract>This paper presents a focused review of cement–superplasticizer interactions. It has been concluded from the survey of the literature that cement–superplasticizer interactions are generally preceded by the adsorption of superplasticizers on the hydrating cement particles. However, the mechanisms of such adsorptive interactions have not been adequately addressed experimentally or discussed in the literature. The reason for this appears to be the lack of a conceptual model that can delineate the results to date and project needed experiments. A charge-controlled-reaction mechanism model involving Ca
2+
ions from initial hydration is proposed to explain the adsorption characteristics of superplasticizers and other organic additives and their effects. The calcium ions released by hydration form a bilayer immediately upon contact of water with the cement, which is followed by adsorption of superplasticizer anions on the Ca
2+
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| ispartof | Advances in cement research, 2000-10, Vol.12 (4), p.153-161 |
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| source | ICE Virtual Library Journals |
| subjects | Admixtures for concrete, mortar and grouts Applied sciences Buildings. Public works Cement concrete constituents Cements Concretes. Mortars. Grouts Exact sciences and technology Hydration Materials Properties of anhydrous and hydrated cement, test methods |
| title | A review of cement-superplasticizer interactions and their models |
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