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The water kinetics of superabsorbent polymers during cement hydration and internal curing visualized and studied by NMR

Didier Snoeck (UGent) , L. Pel and Nele De Belie (UGent)
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Abstract
SuperAbsorbent Polymers (SAPs) can be applied as an admixture in cementitious materials. As the polymers are able to swell, they will absorb part of the mixing water and can then release that water back towards the cementitious matrix for internal curing. This is interesting in terms of autogenous shrinkage mitigation as the internal relative humidity is maintained. The mechanism is theoretically described by the Powers and Brownyard model, but the kinetics and water release still remain subject of detailed investigation. This paper uses Nuclear Magnetic Resonance (NMR) to study the release of water from the superabsorbent polymers towards the cementitious matrix during cement hydration. The release of water by the SAPs is monitored as a function of time and degree of hydration. The internal humidity is also monitored in time by means of sensitive relative-humidity sensors.
Keywords
C-S-H, AUTOGENOUS SHRINKAGE, NEUTRON-RADIOGRAPHY, CONCRETE, MICROSTRUCTURE, MORTARS, RELAXOMETRY, MICROFIBERS, DIFFUSION, STRENGTH

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MLA
Snoeck, Didier, L. Pel, and Nele De Belie. “The Water Kinetics of Superabsorbent Polymers During Cement Hydration and Internal Curing Visualized and Studied by NMR.” SCIENTIFIC REPORTS 7 (2017): n. pag. Print.
APA
Snoeck, D., Pel, L., & De Belie, N. (2017). The water kinetics of superabsorbent polymers during cement hydration and internal curing visualized and studied by NMR. SCIENTIFIC REPORTS, 7.
Chicago author-date
Snoeck, Didier, L. Pel, and Nele De Belie. 2017. “The Water Kinetics of Superabsorbent Polymers During Cement Hydration and Internal Curing Visualized and Studied by NMR.” Scientific Reports 7.
Chicago author-date (all authors)
Snoeck, Didier, L. Pel, and Nele De Belie. 2017. “The Water Kinetics of Superabsorbent Polymers During Cement Hydration and Internal Curing Visualized and Studied by NMR.” Scientific Reports 7.
Vancouver
1.
Snoeck D, Pel L, De Belie N. The water kinetics of superabsorbent polymers during cement hydration and internal curing visualized and studied by NMR. SCIENTIFIC REPORTS. London: Nature Publishing Group; 2017;7.
IEEE
[1]
D. Snoeck, L. Pel, and N. De Belie, “The water kinetics of superabsorbent polymers during cement hydration and internal curing visualized and studied by NMR,” SCIENTIFIC REPORTS, vol. 7, 2017.
@article{8591706,
  abstract     = {SuperAbsorbent Polymers (SAPs) can be applied as an admixture in cementitious materials. As the polymers are able to swell, they will absorb part of the mixing water and can then release that water back towards the cementitious matrix for internal curing. This is interesting in terms of autogenous shrinkage mitigation as the internal relative humidity is maintained. The mechanism is theoretically described by the Powers and Brownyard model, but the kinetics and water release still remain subject of detailed investigation. This paper uses Nuclear Magnetic Resonance (NMR) to study the release of water from the superabsorbent polymers towards the cementitious matrix during cement hydration. The release of water by the SAPs is monitored as a function of time and degree of hydration. The internal humidity is also monitored in time by means of sensitive relative-humidity sensors.},
  articleno    = {9514},
  author       = {Snoeck, Didier and Pel, L. and De Belie, Nele},
  issn         = {2045-2322},
  journal      = {SCIENTIFIC REPORTS},
  keywords     = {C-S-H,AUTOGENOUS SHRINKAGE,NEUTRON-RADIOGRAPHY,CONCRETE,MICROSTRUCTURE,MORTARS,RELAXOMETRY,MICROFIBERS,DIFFUSION,STRENGTH},
  language     = {eng},
  pages        = {14},
  publisher    = {Nature Publishing Group},
  title        = {The water kinetics of superabsorbent polymers during cement hydration and internal curing visualized and studied by NMR},
  url          = {http://dx.doi.org/10.1038/s41598-017-10306-0},
  volume       = {7},
  year         = {2017},
}

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