<sup>13</sup>C, <sup>27</sup>Al and <sup>29</sup>Si NMR Investigation of the Hydration Kinetics of Portland-Limestone Cement Pastes Containing CH<sub>3</sub>-COO<sup>−</sup>-R<sup>+</sup> (R=H or Na) Additives
The hydration kinetics of Portland-limestone cement pastes with organic additives in the form of acetic acid and sodium acetate were studied by using solid-state <sup>13</sup>C, <sup>27</sup>Al and <sup>29</sup>Si NMR spectroscopy. The evolution of the relative co...
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| author | Anton Mazur Peter Tolstoy Konstantinos Sotiriadis |
| author_facet | Anton Mazur Peter Tolstoy Konstantinos Sotiriadis |
| author_sort | Anton Mazur |
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| description | The hydration kinetics of Portland-limestone cement pastes with organic additives in the form of acetic acid and sodium acetate were studied by using solid-state <sup>13</sup>C, <sup>27</sup>Al and <sup>29</sup>Si NMR spectroscopy. The evolution of the relative content of various phases was monitored over the period of one month: amorphous and crystalline calcite (in <sup>13</sup>C spectra), ettringite, aluminum in C-S-H gel, calcium aluminates and calcium hydroaluminates (in <sup>27</sup>Al spectra), as well as alite, belite and silicon in C-S-H gel (in <sup>29</sup>Si spectra). The retarding effect of the additives on cement hydration at early age was demonstrated. We show that the kinetics of phase assemblage formation is influenced by the acetate ion adsorption on the surface of the anhydrous cement components and hydrated phases. The kinetics of formation of ettringite in the cement paste, depending on the addition of acetic and or sodium acetate, is discussed in the context of potential thaumasite sulfate attack. |
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| language | English |
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| spelling | doaj.art-913ead50ab4442cc842c9bfae713e27d2023-11-30T21:17:20ZengMDPI AGMaterials1996-19442022-03-01156200410.3390/ma15062004<sup>13</sup>C, <sup>27</sup>Al and <sup>29</sup>Si NMR Investigation of the Hydration Kinetics of Portland-Limestone Cement Pastes Containing CH<sub>3</sub>-COO<sup>−</sup>-R<sup>+</sup> (R=H or Na) AdditivesAnton Mazur0Peter Tolstoy1Konstantinos Sotiriadis2Physical Chemistry Department, Institute of Chemistry, Saint Petersburg State University, Universitetsky pr. 26, 198504 Saint Petersburg, RussiaPhysical Chemistry Department, Institute of Chemistry, Saint Petersburg State University, Universitetsky pr. 26, 198504 Saint Petersburg, RussiaDepartment of Theoretical and Applied Mechanics, Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, Prosecká 809/76, 19000 Prague, Czech RepublicThe hydration kinetics of Portland-limestone cement pastes with organic additives in the form of acetic acid and sodium acetate were studied by using solid-state <sup>13</sup>C, <sup>27</sup>Al and <sup>29</sup>Si NMR spectroscopy. The evolution of the relative content of various phases was monitored over the period of one month: amorphous and crystalline calcite (in <sup>13</sup>C spectra), ettringite, aluminum in C-S-H gel, calcium aluminates and calcium hydroaluminates (in <sup>27</sup>Al spectra), as well as alite, belite and silicon in C-S-H gel (in <sup>29</sup>Si spectra). The retarding effect of the additives on cement hydration at early age was demonstrated. We show that the kinetics of phase assemblage formation is influenced by the acetate ion adsorption on the surface of the anhydrous cement components and hydrated phases. The kinetics of formation of ettringite in the cement paste, depending on the addition of acetic and or sodium acetate, is discussed in the context of potential thaumasite sulfate attack.https://www.mdpi.com/1996-1944/15/6/2004Portland-limestone cementorganic additiveshydration kineticsNMR spectroscopy |
| spellingShingle | Anton Mazur Peter Tolstoy Konstantinos Sotiriadis <sup>13</sup>C, <sup>27</sup>Al and <sup>29</sup>Si NMR Investigation of the Hydration Kinetics of Portland-Limestone Cement Pastes Containing CH<sub>3</sub>-COO<sup>−</sup>-R<sup>+</sup> (R=H or Na) Additives Materials Portland-limestone cement organic additives hydration kinetics NMR spectroscopy |
| title | <sup>13</sup>C, <sup>27</sup>Al and <sup>29</sup>Si NMR Investigation of the Hydration Kinetics of Portland-Limestone Cement Pastes Containing CH<sub>3</sub>-COO<sup>−</sup>-R<sup>+</sup> (R=H or Na) Additives |
| title_full | <sup>13</sup>C, <sup>27</sup>Al and <sup>29</sup>Si NMR Investigation of the Hydration Kinetics of Portland-Limestone Cement Pastes Containing CH<sub>3</sub>-COO<sup>−</sup>-R<sup>+</sup> (R=H or Na) Additives |
| title_fullStr | <sup>13</sup>C, <sup>27</sup>Al and <sup>29</sup>Si NMR Investigation of the Hydration Kinetics of Portland-Limestone Cement Pastes Containing CH<sub>3</sub>-COO<sup>−</sup>-R<sup>+</sup> (R=H or Na) Additives |
| title_full_unstemmed | <sup>13</sup>C, <sup>27</sup>Al and <sup>29</sup>Si NMR Investigation of the Hydration Kinetics of Portland-Limestone Cement Pastes Containing CH<sub>3</sub>-COO<sup>−</sup>-R<sup>+</sup> (R=H or Na) Additives |
| title_short | <sup>13</sup>C, <sup>27</sup>Al and <sup>29</sup>Si NMR Investigation of the Hydration Kinetics of Portland-Limestone Cement Pastes Containing CH<sub>3</sub>-COO<sup>−</sup>-R<sup>+</sup> (R=H or Na) Additives |
| title_sort | sup 13 sup c sup 27 sup al and sup 29 sup si nmr investigation of the hydration kinetics of portland limestone cement pastes containing ch sub 3 sub coo sup sup r sup sup r h or na additives |
| topic | Portland-limestone cement organic additives hydration kinetics NMR spectroscopy |
| url | https://www.mdpi.com/1996-1944/15/6/2004 |
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