A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Cement hydration in the presence of water soluble polymers
Effects of sodium salts of polyacrylate polymers on the hydration of Portland cement (OPC) were studied at different temperatures and for different concentrations by using various experimental techniques. Rates of heat evolution measurements were made with the help of isothermal heat flow calorimetry. In order to understand the nature of interaction between the polymers and the hydrating cement, Fourier Transform Infrared (FTIR) spectroscopic studies were carried out. Adsorption of polymers over cement surfaces was investigated with the help of UV/VIS spectroscopy. The Mössbauer spectroscopic technique was used to understand the electronic atmosphere around Fe(3+) during the hydration of cement in the absence and presence of polymers. Morphological changes were examined with the help of the scanning electron microscopic technique (SEM). Total porosity and compressive strength measurements have revealed that polymers have no significant effects on these properties. The overall results have shown that polymers retard the hydration and are adsorbed at the surfaces of the cement hydration products and there is a possibility of weak interaction.
Cement hydration in the presence of water soluble polymers
Effects of sodium salts of polyacrylate polymers on the hydration of Portland cement (OPC) were studied at different temperatures and for different concentrations by using various experimental techniques. Rates of heat evolution measurements were made with the help of isothermal heat flow calorimetry. In order to understand the nature of interaction between the polymers and the hydrating cement, Fourier Transform Infrared (FTIR) spectroscopic studies were carried out. Adsorption of polymers over cement surfaces was investigated with the help of UV/VIS spectroscopy. The Mössbauer spectroscopic technique was used to understand the electronic atmosphere around Fe(3+) during the hydration of cement in the absence and presence of polymers. Morphological changes were examined with the help of the scanning electron microscopic technique (SEM). Total porosity and compressive strength measurements have revealed that polymers have no significant effects on these properties. The overall results have shown that polymers retard the hydration and are adsorbed at the surfaces of the cement hydration products and there is a possibility of weak interaction.
Cement hydration in the presence of water soluble polymers
Einflüsse wasserlöslicher Polymere auf die Zementhydratation
Middendorf, B. (author) / Gajbhiye, N.S. (author) / Singh, N.B. (author)
Cement International ; 9 ; 58-69
2011
8 Seiten, 14 Bilder, 4 Tabellen, 20 Quellen
Article (Journal)
English
Portlandzement , Hydratation , Zusatzstoff , Natriumpolyacrylat , Polymer , Konzentrationseinfluss , Hydratationswärme , Wärmefluss , Kalorimetrie , Phasenzusammensetzung , Fourier-Transform-Infrarotspektroskopie , Adsorption , UV-Spektroskopie , Mössbauer-Spektroskopie , Struktur (Werkstoff) , Eisenion , Rasterelektronenmikroskopie , Porosität , Druckfestigkeit
Cement hydration and microstructure formation in the presence of water-soluble polymers
| Online Contents | 2009
Cement hydration and microstructure formation in the presence of water-soluble polymers
| Online Contents | 2009
Cement hydration and microstructure formation in the presence of water-soluble polymers
| British Library Online Contents | 2009
Cement hydration in the presence of high filler contents
| British Library Online Contents | 2005
Hydration of Portland cement in presence of silica fume
| Online Contents | 2010