caa a22 4500 46318839X CHVBK 20180406164900.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s10973-006-8225-7 doi (NATIONALLICENCE)springer-10.1007/s10973-006-8225-7 Thermal hardening and structure of a phosphorus containing cementitious model material [Elektronische Daten] Phosphoric acid-wollastonite [G. Mosselmans, Monique Biesemans, R. Willem, J. Wastiels, M. Leermakers, H. Rahier, S. Brughmans, B. Van Mele] The reaction of phosphoric acid with wollastonite has been studied for reaction mixtures with a molar ratio r=P/Ca from 0.39 up to 2.9. X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) reveal the formation of the crystalline products brushite (when r is smaller than 1.4) and monetite and calcium dihydrogenphosphate monohydrate (when r is above 1). Magic angle spinning nuclear magnetic resonance spectroscopy (MAS NMR) and FTIR show that amorphous silica is also formed which contains some residual calcium and hydroxyl groups. The proposed reactions are confirmed by the evolution of the reaction enthalpy measured with differential scanning calorimetry (DSC). The reaction was monitored with temperature modulated DSC (TMDSC) and dynamic mechanical analysis (DMA). The sharp increase of the elasticity modulus coincides with the onset of decrease in heat capacity. The setting of the reaction mixture does not slow down the reaction rate. Springer Science+Business Media, LLC., 2007 material science nationallicence MTDSC nationallicence phosphorous nationallicence wollastonite nationallicence Mosselmans G. Department of Mechanics of Materials and Constructions, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium aut Biesemans Monique Department of Polymer Science and Structural Chemistry (High Resolution NMR Centre), Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium aut Willem R. Department of Polymer Science and Structural Chemistry (High Resolution NMR Centre), Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium aut Wastiels J. Department of Mechanics of Materials and Constructions, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium aut Leermakers M. Department of Analytical and Environmental Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium aut Rahier H. Department of Polymer Science and Structural Chemistry (Physical Chemistry and Polymer Science), Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium aut Brughmans S. Department of Polymer Science and Structural Chemistry (Physical Chemistry and Polymer Science), Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium aut Van Mele B. Department of Polymer Science and Structural Chemistry (Physical Chemistry and Polymer Science), Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium aut Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 88/3(2007-06-01), 723-729 1388-6150 88:3<723 2007 88 10973 https://doi.org/10.1007/s10973-006-8225-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-8225-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mosselmans G. Department of Mechanics of Materials and Constructions, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium aut NATIONALLICENCE 700 1- Biesemans Monique Department of Polymer Science and Structural Chemistry (High Resolution NMR Centre), Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium aut NATIONALLICENCE 700 1- Willem R. Department of Polymer Science and Structural Chemistry (High Resolution NMR Centre), Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium aut NATIONALLICENCE 700 1- Wastiels J. Department of Mechanics of Materials and Constructions, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium aut NATIONALLICENCE 700 1- Leermakers M. Department of Analytical and Environmental Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium aut NATIONALLICENCE 700 1- Rahier H. Department of Polymer Science and Structural Chemistry (Physical Chemistry and Polymer Science), Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium aut NATIONALLICENCE 700 1- Brughmans S. Department of Polymer Science and Structural Chemistry (Physical Chemistry and Polymer Science), Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium aut NATIONALLICENCE 700 1- Van Mele B. Department of Polymer Science and Structural Chemistry (Physical Chemistry and Polymer Science), Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 88/3(2007-06-01), 723-729 1388-6150 88:3<723 2007 88 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer