The surface area of cement paste as measured by neutron scattering: evidence for two C-S-H morphologies
Small-angle neutron scattering was used to measure the effect of water-to-cement ratio (w/c) and cement batch variation on the surface area of ordinary Portland cement (OPC) paste after hydration for 28 days at room temperature, and to measure the development of surface area over the first 3 days of...
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| Veröffentlicht in: | Cement and Concrete Research 1998-06, Vol.28 (6), p.897-905 |
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| creator | Thomas, J.J Jennings, H.M Allen, A.J |
| description | Small-angle neutron scattering was used to measure the effect of water-to-cement ratio (w/c) and cement batch variation on the surface area of ordinary Portland cement (OPC) paste after hydration for 28 days at room temperature, and to measure the development of surface area over the first 3 days of hydration at 30°C. The 28-day surface area was found to increase with w/c ratio in proportion to the volume of original water-filled space available for reaction product to form. The surface areas of different batches of type I OPC were quite similar, while that of a type II OPC was some 15% lower. Early surface area development at 30°C followed the heat evolution for the first 24 h of hydration and then leveled off, suggesting that further heat evolution was associated with reaction product, which added little to the surface area. These results support the theory that two different morphologies of the calcium-silicate-hydrate gel reaction product form during cement hydration. |
| doi_str_mv | 10.1016/S0008-8846(98)00049-0 |
| format | Article |
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The 28-day surface area was found to increase with w/c ratio in proportion to the volume of original water-filled space available for reaction product to form. The surface areas of different batches of type I OPC were quite similar, while that of a type II OPC was some 15% lower. Early surface area development at 30°C followed the heat evolution for the first 24 h of hydration and then leveled off, suggesting that further heat evolution was associated with reaction product, which added little to the surface area. These results support the theory that two different morphologies of the calcium-silicate-hydrate gel reaction product form during cement hydration.</description><identifier>ISSN: 0008-8846</identifier><identifier>EISSN: 1873-3948</identifier><identifier>DOI: 10.1016/S0008-8846(98)00049-0</identifier><identifier>CODEN: CCNRAI</identifier><language>eng</language><publisher>New York, NY: Elsevier Ltd</publisher><subject>Applied sciences ; Buildings. Public works ; Cement concrete constituents ; Cements ; CONCENTRATION RATIO ; Exact sciences and technology ; HEAT FLUX ; HYDRATION ; Materials ; MATERIALS SCIENCE ; MORPHOLOGY ; NEUTRONS ; PORTLAND CEMENT ; Properties and test methods ; Properties of anhydrous and hydrated cement, test methods ; SMALL ANGLE SCATTERING ; SURFACE AREA ; TIME DEPENDENCE</subject><ispartof>Cement and Concrete Research, 1998-06, Vol.28 (6), p.897-905</ispartof><rights>1998 Elsevier Science Inc.</rights><rights>1998 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c492t-997912b8ce2b3e50e338ac983d70b09fd251397a17816dec513b568066d28bd33</citedby><cites>FETCH-LOGICAL-c492t-997912b8ce2b3e50e338ac983d70b09fd251397a17816dec513b568066d28bd33</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0008884698000490$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,881,3537,27901,27902,65534</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=2330335$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/642126$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><contributor>WCA</contributor><creatorcontrib>Thomas, J.J</creatorcontrib><creatorcontrib>Jennings, H.M</creatorcontrib><creatorcontrib>Allen, A.J</creatorcontrib><title>The surface area of cement paste as measured by neutron scattering: evidence for two C-S-H morphologies</title><title>Cement and Concrete Research</title><description>Small-angle neutron scattering was used to measure the effect of water-to-cement ratio (w/c) and cement batch variation on the surface area of ordinary Portland cement (OPC) paste after hydration for 28 days at room temperature, and to measure the development of surface area over the first 3 days of hydration at 30°C. The 28-day surface area was found to increase with w/c ratio in proportion to the volume of original water-filled space available for reaction product to form. The surface areas of different batches of type I OPC were quite similar, while that of a type II OPC was some 15% lower. Early surface area development at 30°C followed the heat evolution for the first 24 h of hydration and then leveled off, suggesting that further heat evolution was associated with reaction product, which added little to the surface area. These results support the theory that two different morphologies of the calcium-silicate-hydrate gel reaction product form during cement hydration.</description><subject>Applied sciences</subject><subject>Buildings. Public works</subject><subject>Cement concrete constituents</subject><subject>Cements</subject><subject>CONCENTRATION RATIO</subject><subject>Exact sciences and technology</subject><subject>HEAT FLUX</subject><subject>HYDRATION</subject><subject>Materials</subject><subject>MATERIALS SCIENCE</subject><subject>MORPHOLOGY</subject><subject>NEUTRONS</subject><subject>PORTLAND CEMENT</subject><subject>Properties and test methods</subject><subject>Properties of anhydrous and hydrated cement, test methods</subject><subject>SMALL ANGLE SCATTERING</subject><subject>SURFACE AREA</subject><subject>TIME DEPENDENCE</subject><issn>0008-8846</issn><issn>1873-3948</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1998</creationdate><recordtype>article</recordtype><recordid>eNqFkF1LHDEUhkOx0NX2JxQiSNGLafMxk0l6I7LUWhB6ob0OmeTMbmQmWZOsxX_fjCve9iq84TnvOTwIfabkKyVUfLsjhMhGylacK3lRQ6sa8g6tqOx5w1Urj9DqDfmAjnN-qFEwLldoc78FnPdpNBawSWBwHLGFGULBO5NL_cx4BlMRcHh4xgH2JcWAszWlQPJh8x3Dk3cQasEYEy5_I143d80NnmPabeMUNx7yR_R-NFOGT6_vCfpz_eN-fdPc_v75a31129hWsdIo1SvKBmmBDRw6ApxLY5XkricDUaNjHeWqN7SXVDiwNQ2dkEQIx-TgOD9Bp4femIvX2foCdmtjCGCLFi2jTFTmy4HZpfi4h1z07LOFaTIB4j5rJnpZK2kFuwNoU8w5wah3yc8mPWtK9KJev6jXi1etpH5Rr0mdO3tdYKqmaUwmWJ_fhhnnhPOuYpcHDKqQJw9puXfx6HxaznXR_2fRP2zClv0</recordid><startdate>19980601</startdate><enddate>19980601</enddate><creator>Thomas, J.J</creator><creator>Jennings, H.M</creator><creator>Allen, A.J</creator><general>Elsevier Ltd</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>8FD</scope><scope>JG9</scope><scope>OTOTI</scope></search><sort><creationdate>19980601</creationdate><title>The surface area of cement paste as measured by neutron scattering: evidence for two C-S-H morphologies</title><author>Thomas, J.J ; Jennings, H.M ; Allen, A.J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c492t-997912b8ce2b3e50e338ac983d70b09fd251397a17816dec513b568066d28bd33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1998</creationdate><topic>Applied sciences</topic><topic>Buildings. Public works</topic><topic>Cement concrete constituents</topic><topic>Cements</topic><topic>CONCENTRATION RATIO</topic><topic>Exact sciences and technology</topic><topic>HEAT FLUX</topic><topic>HYDRATION</topic><topic>Materials</topic><topic>MATERIALS SCIENCE</topic><topic>MORPHOLOGY</topic><topic>NEUTRONS</topic><topic>PORTLAND CEMENT</topic><topic>Properties and test methods</topic><topic>Properties of anhydrous and hydrated cement, test methods</topic><topic>SMALL ANGLE SCATTERING</topic><topic>SURFACE AREA</topic><topic>TIME DEPENDENCE</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Thomas, J.J</creatorcontrib><creatorcontrib>Jennings, H.M</creatorcontrib><creatorcontrib>Allen, A.J</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>OSTI.GOV</collection><jtitle>Cement and Concrete Research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Thomas, J.J</au><au>Jennings, H.M</au><au>Allen, A.J</au><au>WCA</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The surface area of cement paste as measured by neutron scattering: evidence for two C-S-H morphologies</atitle><jtitle>Cement and Concrete Research</jtitle><date>1998-06-01</date><risdate>1998</risdate><volume>28</volume><issue>6</issue><spage>897</spage><epage>905</epage><pages>897-905</pages><issn>0008-8846</issn><eissn>1873-3948</eissn><coden>CCNRAI</coden><abstract>Small-angle neutron scattering was used to measure the effect of water-to-cement ratio (w/c) and cement batch variation on the surface area of ordinary Portland cement (OPC) paste after hydration for 28 days at room temperature, and to measure the development of surface area over the first 3 days of hydration at 30°C. 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| source | Elsevier ScienceDirect Journals |
| subjects | Applied sciences Buildings. Public works Cement concrete constituents Cements CONCENTRATION RATIO Exact sciences and technology HEAT FLUX HYDRATION Materials MATERIALS SCIENCE MORPHOLOGY NEUTRONS PORTLAND CEMENT Properties and test methods Properties of anhydrous and hydrated cement, test methods SMALL ANGLE SCATTERING SURFACE AREA TIME DEPENDENCE |
| title | The surface area of cement paste as measured by neutron scattering: evidence for two C-S-H morphologies |
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