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Publikācija: Influence of Superabsorbent Polymers on Hydration of Cement Pastes with Low Water-to-Binder Ratio

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Publikācijas valoda English (en)
Nosaukums oriģinālvalodā Influence of Superabsorbent Polymers on Hydration of Cement Pastes with Low Water-to-Binder Ratio
Pētniecības nozare 2. Inženierzinātnes un tehnoloģijas
Pētniecības apakšnozare 2.1. Būvniecības un transporta inženierzinātnes
Autori Jānis Justs
Mateusz Wyrzykowski
Frank Winnefeld
Diāna Bajāre
Pietro Lura
Atslēgas vārdi
Anotācija Internal curing with superabsorbent polymers (SAP) is a method for promoting hydration of cement and limiting self-desiccation, shrinkage and cracking in high-performance, and ultra high-performance concrete with low water-to-binder ratio. SAP are introduced in the dry state during mixing and form water-filled inclusions by absorbing pore solution. The absorbed solution is later released to the cement paste during hydration of the cement. In this paper, cement pastes with low water-to-binder ratios incorporating superplasticizer and different dosages of SAP and corresponding additional water were prepared. Reference cement pastes without SAP but with the same amount of water and superplasticizer were also mixed. Isothermal calorimetry was used to measure hydration heat flow. Water entrainment by means of SAP increased the degree of hydration at later hydration times in a manner similar to increasing the water-to-binder ratio. Addition of SAP also delayed the main calorimetric hydration peak compared to the reference pastes, however, in a less prominent manner than the increase in water-to-cement ratio.
DOI: 10.1007/s10973-013-3359-x
Hipersaite: http://link.springer.com/content/pdf/10.1007/s10973-013-3359-x.pdf 
Atsauce Justs, J., Wyrzykowski, M., Winnefeld, F., Bajāre, D., Lura, P. Influence of Superabsorbent Polymers on Hydration of Cement Pastes with Low Water-to-Binder Ratio. Journal of Thermal Analysis and Calorimetry, 2014, Vol.115, Iss.1, 425.-432.lpp. ISSN 1388-6150. e-ISSN 1572-8943. Pieejams: doi:10.1007/s10973-013-3359-x
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