Continuous optical in-situ pH monitoring during early hydration of cementitious materials
A luminescent sensor technique for pH analyses has been tested in cementitious media. The optical sensors monitor in-situ pH every 5 s during early hydration reactions over a period of 100 h from initial fluid up to consolidated stage. The pH development was analysed in calcium aluminate, calcium su...
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| Veröffentlicht in: | Cement and concrete research 2021-12, Vol.150, p.106584, Article 106584 |
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| container_title | Cement and concrete research |
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| creator | Galan, Isabel Müller, Bernhard Briendl, Lukas G. Mittermayr, Florian Mayr, Torsten Dietzel, Martin Grengg, Cyrill |
| description | A luminescent sensor technique for pH analyses has been tested in cementitious media. The optical sensors monitor in-situ pH every 5 s during early hydration reactions over a period of 100 h from initial fluid up to consolidated stage. The pH development was analysed in calcium aluminate, calcium sulfoaluminate and OPC/slag cements up to a pH level of 13.3 and directly correlated with the heat of hydration. Thus tracing the dissolution and formation processes of solid phases via pH sensor monitoring is possible. This measurement technique enables the recording of continuous and highly reproducible pH data sets from slurries, pastes, and hardening materials leading to new vistas for individual (trans)formation pathways of solids, hydration and consolidation reactions in high alkaline cementitious systems.
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| doi_str_mv | 10.1016/j.cemconres.2021.106584 |
| format | Article |
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[Display omitted]</description><subject>Calcium aluminate</subject><subject>Cement</subject><subject>Heat of hydration</subject><subject>Hydration</subject><subject>Luminescent sensors</subject><subject>Measurement techniques</subject><subject>Monitoring</subject><subject>Optical measuring instruments</subject><subject>Pastes</subject><subject>Slag cements</subject><subject>Slurries</subject><subject>Solid phases</subject><subject>Sulfoaluminate</subject><issn>0008-8846</issn><issn>1873-3948</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNqFUMtKxDAUDaLgOPoNFlx3zKNt0uUw-IIBN7pwFTLJraZMk5qkwvy9GStuXR3O5Ty4B6FrglcEk-a2X2kYtHcB4opiSvK1qUV1ghZEcFaythKnaIExFqUQVXOOLmLsM20oEwv0tvEuWTf5KRZ-TFarfWFdGW2aivGxGLyzyQfr3gsz_QCosD8UHwcTVLLeFb4rcj_kkExzyKASBKv28RKddRng6heX6PX-7mXzWG6fH542622pGaWpBGI0rpgRrBUYoKW06cxux2inqQZFhd5VVQOqU4oDbjWttTCE47o2jeG8ZUt0M-eOwX9OEJPs_RRcrpS0bitOGGdHFZ9VOvgYA3RyDHZQ4SAJlscdZS__dpTHHeW8Y3auZyfkJ74sBBm1BafB2AA6SePtvxnfPGeCYQ</recordid><startdate>202112</startdate><enddate>202112</enddate><creator>Galan, Isabel</creator><creator>Müller, Bernhard</creator><creator>Briendl, Lukas G.</creator><creator>Mittermayr, Florian</creator><creator>Mayr, Torsten</creator><creator>Dietzel, Martin</creator><creator>Grengg, Cyrill</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>6I.</scope><scope>AAFTH</scope><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>202112</creationdate><title>Continuous optical in-situ pH monitoring during early hydration of cementitious materials</title><author>Galan, Isabel ; Müller, Bernhard ; Briendl, Lukas G. ; Mittermayr, Florian ; Mayr, Torsten ; Dietzel, Martin ; Grengg, Cyrill</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c322t-e1dc043d83980ee9226fdbb32fc2cea28cb446eafaa7e09c25c8d17055d6d7793</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Calcium aluminate</topic><topic>Cement</topic><topic>Heat of hydration</topic><topic>Hydration</topic><topic>Luminescent sensors</topic><topic>Measurement techniques</topic><topic>Monitoring</topic><topic>Optical measuring instruments</topic><topic>Pastes</topic><topic>Slag cements</topic><topic>Slurries</topic><topic>Solid phases</topic><topic>Sulfoaluminate</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Galan, Isabel</creatorcontrib><creatorcontrib>Müller, Bernhard</creatorcontrib><creatorcontrib>Briendl, Lukas G.</creatorcontrib><creatorcontrib>Mittermayr, Florian</creatorcontrib><creatorcontrib>Mayr, Torsten</creatorcontrib><creatorcontrib>Dietzel, Martin</creatorcontrib><creatorcontrib>Grengg, Cyrill</creatorcontrib><collection>ScienceDirect Open Access Titles</collection><collection>Elsevier:ScienceDirect:Open Access</collection><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>Galan, Isabel</au><au>Müller, Bernhard</au><au>Briendl, Lukas G.</au><au>Mittermayr, Florian</au><au>Mayr, Torsten</au><au>Dietzel, Martin</au><au>Grengg, Cyrill</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Continuous optical in-situ pH monitoring during early hydration of cementitious materials</atitle><jtitle>Cement and concrete research</jtitle><date>2021-12</date><risdate>2021</risdate><volume>150</volume><spage>106584</spage><pages>106584-</pages><artnum>106584</artnum><issn>0008-8846</issn><eissn>1873-3948</eissn><abstract>A luminescent sensor technique for pH analyses has been tested in cementitious media. The optical sensors monitor in-situ pH every 5 s during early hydration reactions over a period of 100 h from initial fluid up to consolidated stage. The pH development was analysed in calcium aluminate, calcium sulfoaluminate and OPC/slag cements up to a pH level of 13.3 and directly correlated with the heat of hydration. Thus tracing the dissolution and formation processes of solid phases via pH sensor monitoring is possible. This measurement technique enables the recording of continuous and highly reproducible pH data sets from slurries, pastes, and hardening materials leading to new vistas for individual (trans)formation pathways of solids, hydration and consolidation reactions in high alkaline cementitious systems.
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| ispartof | Cement and concrete research, 2021-12, Vol.150, p.106584, Article 106584 |
| issn | 0008-8846 1873-3948 |
| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Calcium aluminate Cement Heat of hydration Hydration Luminescent sensors Measurement techniques Monitoring Optical measuring instruments Pastes Slag cements Slurries Solid phases Sulfoaluminate |
| title | Continuous optical in-situ pH monitoring during early hydration of cementitious materials |
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