can anyone help me in this, it will help me with my research work
Water permeability can be tested by permeability testing equipment.you may read the attachment.
As an early-career researcher, you need to survey the state-of-the-art on this topic through a systematic literature review. Based on which you could identify the knowledge gap that you are addressing, determine clear objectives for your research, then the best test procedures can emerge accordingly. If you just listen to some opinions here that respond to a vague question, you could be mislead and lose valuable time. Transport properties in concrete can be measured using gas permeability, liquid permeability, diffusion-based tests, migration tests, surface resistivity tests, etc. All of which have benefits and shortcomings. Several details in your question are missing to give you a better-informed answer.
Dear Santosh Kumar Gottapu
Permeation describes the process of movement of fluids through the pore structure under an externally applied pressure while the pores are saturated with the particular fluid. Permeability is therefore a measure of the capacity for concrete to transfer fluids by permeation. The permeability of concrete is dependent on the concrete microstructure, the moisture condition of the material and the characteristics of the permeating fluid.
The Oxygen Permeability Index (OPI) test method consists of measuring the pressure decay of oxygen passed through a 30-mm thick slice of a (typically) 68 to 70-mm diameter core of concrete placed in a falling head permeameter (Attached Figure). The oxygen permeability index is defined as the negative log of the coefficient of permeability. Common OPI values for South African concretes range from 8,5 to 10,5, a higher value indicating a higher impermeability and thus a concrete of potentially higher quality. Oxygen permeability index is measured on a log scale, therefore the difference between 8,5 and 10,5 is substantial. An empirical prediction model for carbonation was formulated using the oxygen permeability test. The oxygen permeability test assesses the overall micro- and macrostructure of the outer surface of cast concrete, and is particularly sensitive to macro-voids and cracks which act as short-circuits for the permeating gas. Thus the test is very useful to assess the state of compaction, presence of bleed voids and channels, and the degree of interconnectedness of the pore structure.
Thanks
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