Barberon F, Korb J-P, Petit D, Morin V, Bermejo E
Laboratoire de Physique de la Matière Condensée, UMR 7643 du CNRS, Ecole Polytechnique, 91128 Palaiseau Cedex, France.
Phys Rev Lett. 2003 Mar 21;90(11):116103. doi: 10.1103/PhysRevLett.90.116103. Epub 2003 Mar 20.
We show how nuclear magnetic spin-lattice relaxation dispersion of 1H water can provide a direct reliable value of the specific surface area of a cement-based material. The remarkable features of the relaxation dispersion support an interpretation in terms of coupled solid-liquid relaxation at pore interfaces, surface diffusion, and nuclear paramagnetic relaxation. The measurement is sufficiently fast to be applied continuously during the progressive hydration and setting of the material. This method is relevant to other chemically reactive porous media in chemical engineering and oil recovery.
我们展示了1H水的核磁共振自旋-晶格弛豫色散如何能够提供水泥基材料比表面积的直接可靠值。弛豫色散的显著特征支持了基于孔隙界面处固液耦合弛豫、表面扩散和核顺磁弛豫的解释。该测量速度足够快，能够在材料的渐进水化和凝结过程中持续应用。这种方法适用于化学工程和石油开采中的其他化学反应性多孔介质。
