Uncovering the role of micro silica in hydration of ultra-high performance concrete (UHPC)
This study aims to clarify the role of micro silica in hydration of UHPC. The behavior of two different types of micro silica in UHPC was investigated with regard to their filler effect and pozzolanic reaction by using analytical techniques; XRD, TG, 29Si and 27Al NMR spectroscopy, and MIP. The micr...
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| Veröffentlicht in: | Cement and concrete research 2018-02, Vol.104, p.68-79 |
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| creator | Lee, Nam Kon Koh, K.T. Kim, Min Ook Ryu, G.S. |
| description | This study aims to clarify the role of micro silica in hydration of UHPC. The behavior of two different types of micro silica in UHPC was investigated with regard to their filler effect and pozzolanic reaction by using analytical techniques; XRD, TG, 29Si and 27Al NMR spectroscopy, and MIP. The micro silica with high pozzolanic activity led to the higher level of Al-substitution for Si in C-S-H and the denser structure, thus increasing compressive strength, whereas that facilitating filler effect limited the consumption of Ca(OH)2 even after high temperature curing and led to the higher amount of AFm phase. In the UHPC showing high filler effect, additional hydration of C3S and C2S occurred at later ages, increasing the fraction of Q1 site in C-S-H and decreasing the porosity in the pore diameter region below 10nm. Consequently, a significant increase in the compressive strength of this UHPC was achieved. |
| doi_str_mv | 10.1016/j.cemconres.2017.11.002 |
| format | Article |
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The behavior of two different types of micro silica in UHPC was investigated with regard to their filler effect and pozzolanic reaction by using analytical techniques; XRD, TG, 29Si and 27Al NMR spectroscopy, and MIP. The micro silica with high pozzolanic activity led to the higher level of Al-substitution for Si in C-S-H and the denser structure, thus increasing compressive strength, whereas that facilitating filler effect limited the consumption of Ca(OH)2 even after high temperature curing and led to the higher amount of AFm phase. In the UHPC showing high filler effect, additional hydration of C3S and C2S occurred at later ages, increasing the fraction of Q1 site in C-S-H and decreasing the porosity in the pore diameter region below 10nm. Consequently, a significant increase in the compressive strength of this UHPC was achieved.</description><identifier>ISSN: 0008-8846</identifier><identifier>EISSN: 1873-3948</identifier><identifier>DOI: 10.1016/j.cemconres.2017.11.002</identifier><language>eng</language><publisher>Elmsford: Elsevier Ltd</publisher><subject>Aluminum ; Compressive strength ; Concrete ; Dicalcium silicate ; Filler effect ; Hydration ; Hydration product ; Mechanical properties ; Micro silica ; Microstructure ; NMR ; NMR spectroscopy ; Nuclear magnetic resonance ; Porosity ; Silica ; Silica fume ; Silicon dioxide ; Studies ; Substitution reactions ; Tricalcium silicate ; UHPC ; Ultra high performance concrete</subject><ispartof>Cement and concrete research, 2018-02, Vol.104, p.68-79</ispartof><rights>2017 Elsevier Ltd</rights><rights>Copyright Elsevier BV Feb 2018</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c343t-1316abd6a9ffa51759403a35151b36eb1e9241e0f73e02f0dedababe1636901e3</citedby><cites>FETCH-LOGICAL-c343t-1316abd6a9ffa51759403a35151b36eb1e9241e0f73e02f0dedababe1636901e3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0008884617305987$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65534</link.rule.ids></links><search><creatorcontrib>Lee, Nam Kon</creatorcontrib><creatorcontrib>Koh, K.T.</creatorcontrib><creatorcontrib>Kim, Min Ook</creatorcontrib><creatorcontrib>Ryu, G.S.</creatorcontrib><title>Uncovering the role of micro silica in hydration of ultra-high performance concrete (UHPC)</title><title>Cement and concrete research</title><description>This study aims to clarify the role of micro silica in hydration of UHPC. The behavior of two different types of micro silica in UHPC was investigated with regard to their filler effect and pozzolanic reaction by using analytical techniques; XRD, TG, 29Si and 27Al NMR spectroscopy, and MIP. The micro silica with high pozzolanic activity led to the higher level of Al-substitution for Si in C-S-H and the denser structure, thus increasing compressive strength, whereas that facilitating filler effect limited the consumption of Ca(OH)2 even after high temperature curing and led to the higher amount of AFm phase. In the UHPC showing high filler effect, additional hydration of C3S and C2S occurred at later ages, increasing the fraction of Q1 site in C-S-H and decreasing the porosity in the pore diameter region below 10nm. Consequently, a significant increase in the compressive strength of this UHPC was achieved.</description><subject>Aluminum</subject><subject>Compressive strength</subject><subject>Concrete</subject><subject>Dicalcium silicate</subject><subject>Filler effect</subject><subject>Hydration</subject><subject>Hydration product</subject><subject>Mechanical properties</subject><subject>Micro silica</subject><subject>Microstructure</subject><subject>NMR</subject><subject>NMR spectroscopy</subject><subject>Nuclear magnetic resonance</subject><subject>Porosity</subject><subject>Silica</subject><subject>Silica fume</subject><subject>Silicon dioxide</subject><subject>Studies</subject><subject>Substitution reactions</subject><subject>Tricalcium silicate</subject><subject>UHPC</subject><subject>Ultra high performance concrete</subject><issn>0008-8846</issn><issn>1873-3948</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNqFkDFPwzAQhS0EEqXwG7DEAkOCL06cZKwqoEiVYKALi-U4l8ZREhc7Req_x1URK9PpdO_d3fsIuQUWAwPx2MUaB21Hhz5OGOQxQMxYckZmUOQ84mVanJMZY6yIiiIVl-TK-y60IuHFjHxuRm2_0ZlxS6cWqbM9UtvQwWhnqTe90YqakbaH2qnJ2PE43PeTU1Frti3doWusG9SokYYntMMJ6f1m9b58uCYXjeo93vzWOdk8P30sV9H67eV1uVhHmqd8ioCDUFUtVNk0KoM8K1PGFc8gg4oLrADLJAVkTc6RJQ2rsVaVqhAEFyUD5HNyd9q7c_Zrj36Snd27MZyUgUfCBAjGgyo_qUIu7x02cufMoNxBApNHkLKTfyCPxlwCyAAyOBcnJ4YQ3wad9NpgCFwbh3qStTX_7vgB9MSAPw</recordid><startdate>201802</startdate><enddate>201802</enddate><creator>Lee, Nam Kon</creator><creator>Koh, K.T.</creator><creator>Kim, Min Ook</creator><creator>Ryu, G.S.</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope></search><sort><creationdate>201802</creationdate><title>Uncovering the role of micro silica in hydration of ultra-high performance concrete (UHPC)</title><author>Lee, Nam Kon ; Koh, K.T. ; Kim, Min Ook ; Ryu, G.S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c343t-1316abd6a9ffa51759403a35151b36eb1e9241e0f73e02f0dedababe1636901e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Aluminum</topic><topic>Compressive strength</topic><topic>Concrete</topic><topic>Dicalcium silicate</topic><topic>Filler effect</topic><topic>Hydration</topic><topic>Hydration product</topic><topic>Mechanical properties</topic><topic>Micro silica</topic><topic>Microstructure</topic><topic>NMR</topic><topic>NMR spectroscopy</topic><topic>Nuclear magnetic resonance</topic><topic>Porosity</topic><topic>Silica</topic><topic>Silica fume</topic><topic>Silicon dioxide</topic><topic>Studies</topic><topic>Substitution reactions</topic><topic>Tricalcium silicate</topic><topic>UHPC</topic><topic>Ultra high performance concrete</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lee, Nam Kon</creatorcontrib><creatorcontrib>Koh, K.T.</creatorcontrib><creatorcontrib>Kim, Min Ook</creatorcontrib><creatorcontrib>Ryu, G.S.</creatorcontrib><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Cement and concrete research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lee, Nam Kon</au><au>Koh, K.T.</au><au>Kim, Min Ook</au><au>Ryu, G.S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Uncovering the role of micro silica in hydration of ultra-high performance concrete (UHPC)</atitle><jtitle>Cement and concrete research</jtitle><date>2018-02</date><risdate>2018</risdate><volume>104</volume><spage>68</spage><epage>79</epage><pages>68-79</pages><issn>0008-8846</issn><eissn>1873-3948</eissn><abstract>This study aims to clarify the role of micro silica in hydration of UHPC. The behavior of two different types of micro silica in UHPC was investigated with regard to their filler effect and pozzolanic reaction by using analytical techniques; XRD, TG, 29Si and 27Al NMR spectroscopy, and MIP. The micro silica with high pozzolanic activity led to the higher level of Al-substitution for Si in C-S-H and the denser structure, thus increasing compressive strength, whereas that facilitating filler effect limited the consumption of Ca(OH)2 even after high temperature curing and led to the higher amount of AFm phase. In the UHPC showing high filler effect, additional hydration of C3S and C2S occurred at later ages, increasing the fraction of Q1 site in C-S-H and decreasing the porosity in the pore diameter region below 10nm. Consequently, a significant increase in the compressive strength of this UHPC was achieved.</abstract><cop>Elmsford</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.cemconres.2017.11.002</doi><tpages>12</tpages></addata></record> |
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| ispartof | Cement and concrete research, 2018-02, Vol.104, p.68-79 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Aluminum Compressive strength Concrete Dicalcium silicate Filler effect Hydration Hydration product Mechanical properties Micro silica Microstructure NMR NMR spectroscopy Nuclear magnetic resonance Porosity Silica Silica fume Silicon dioxide Studies Substitution reactions Tricalcium silicate UHPC Ultra high performance concrete |
| title | Uncovering the role of micro silica in hydration of ultra-high performance concrete (UHPC) |
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