Non-Destructive Testing for the In Situ Assessment of the Ionic Flux in Cementitious Materials

International Conference on Materials, Alloys and Experimental Mechanics 2017

材料科学;金属学;机械制造

Tittarelli, Francesca^1 ; Pierpaoli, Mattia^1 ; Giosuè, Chiara^1 ; Ruello, M. Letizia^1

Department of Materials and Environment Engineering and Physics (SIMAU), Università Politecnica Delle Marche (UNIVPM), UdR INSTM, Via Brecce Bianche, 60131, Ancona, Italy^1

关键词: Cementitious materials;    Diffusion chamber;    Diffusion fluxes;    Diffusive sampling;    Equilibrium conditions;    In-situ assessment;    Ionic exchange;    Non destructive testing;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/225/1/012108/pdf
DOI  :  10.1088/1757-899X/225/1/012108

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The study deals with the design, calibration and testing of a diffusive sampling probe for in situ assessment of ion mobility in binder-based matrix. In parallel, leaching texts were conducted to compare the ions release obtained under equilibrium condition with the dynamic flux induced by the diffusive sampling probe. The probe contains an ionic exchange resin that acts as sink, causing a re-supply of ions from the solid to the solution phase, and inducing diffusion fluxes from the mortar through a thin diffusion chamber. The flux depends on the quantity of mobile ions in the solid phase and on the exchanging rate from solid phase to solution. By means of the in situ sampling with this diffusive probe, information about the interaction of materials with the environment can be obtained. This information is very useful for the environmental impact assessment of the material and its durability.