Adsorption behavior of ions on fracture surfaces of cement-based materials

作者：Wang Xiaomei; Li Kefei^*

来源：Journal of the Chinese Ceramic Society, 2011, 39(1): 1-6.

• Adsorption behavior
• Adsorption capacities
• Adsorption layer
• Adsorption parameters
• Advection-dispersion equation
• Cement based material
• Fracture surface
• Fracture surfaces
• Fractured surfaces
• Immersion tests
• Ion adsorption
• Ion transports
• Liquid flow
• Static and dynamic
• Static solutions
• Surface adsorption
• Test results
• Transient absorption
• Transient adsorption

The surface adsorption behavior of fractured surfaces of cement-based materials was investigated. Transient adsorption model was established through advection-dispersion equation for solute transport in fractures. Then static and dynamic adsorption behaviors were studied through static immersion test and fracture infiltration test. Moreover, the adsorption parameters in the transient absorption model were regressed on the basis of the immersion test and infiltration test results. The results show that the ion adsorption capacity of fractured surfaces is more important for static solution than dynamic infiltrating solution. The decreased adsorption capacity of ions can be attributed to the decreased thickness of adsorption layer of fractured surfaces by liquid flow.

• 出版日期2011
• 单位清华大学