Effect of MHEC on evaporation and hydration characteristics of glue mortar |
| |
| Affiliation: | 1. Materials innovation institute, Mekelweg 2, P.O. Box 5008, 2628 CD Delft, The Netherlands;2. Department of Applied Physics, Eindhoven University of Technology, Den Dolech 2, P.O. Box 513, 5600 MB Eindhoven, The Netherlands;3. Netherlands Organization for Applied Scientific Research (TNO), P.O. Box 49, 2600 AA Delft, The Netherlands;1. Department of Cardiology B, Copenhagen University Hospital/Rigshospitalet;2. Department of Cardiology S, Copenhagen University Hospital/Herlev-Gentofte Hospital;3. Department of Cardiology, Roskilde University Hospital;4. Department of Cardiology B, Odense University Hospital;1. Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland;2. Riga Technical University, Institute of Materials and Structures, Riga, Latvia;3. Politecnico di Milano, Department of Civil and Environmental Engineering, Milan, Italy;4. Lodz University of Technology, Department of Building Physics and Building Materials, Lodz, Poland;5. Paul Scherrer Institute, Laboratory for Neutron Scattering and Imaging, Villigen, Switzerland;6. ETH Zürich, Institute for Building Materials (IfB), Zürich, Switzerland;1. University of Cergy-Pontoise, Laboratory of Mechanics and Materials of Civil Engineering, 5 mail Gay-Lussac, Neuville-sur-Oise, 95031 Cergy-Pontoise, France;2. UEB-LIMATB, ECOMATH, Université de Bretagne Sud, Centre de Recherche de St Maudé, 56321 Lorient, France |
| |
| Abstract: | The influence of methylhydroxyethylcellulose (MHEC) on both moisture distribution and hydration characteristics of glue mortar using nuclear magnetic resonance imaging (NMR) is investigated. MHEC is added to glue mortar in order to control the drying rate by increasing the open time. Besides drying, MHEC might influence hydration characteristics of mortar. In this study, we therefore examined the effect of MHEC on the hydration characteristics of unsealed mortar. Without MHEC, the evaporation time is faster than hydration time and the water distribution is homogeneous in the mortar, resulting in poor hydration. Addition of MHEC > 1.3 wt.% exhibits an evaporation time comparable to the hydration time of mortar. However, in that case, inhomogeneous distribution of water causes differences in the degree of hydration throughout the mortar sample, i.e. the top surface shows poor hydration and the bottom surface shows good hydration, as confirmed by MIP and T2 relaxation analysis. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
