Effect of Chloride on Electrical Resistivity in Carbonated and Non-Carbonated Concrete
Round 1
Reviewer 1 Report
This is an interesting work on determining the effect of chloride on the electrical resistivity in concrete. Potentially, this method can be used to determine the deterioration of concert, due to the presence of chloride.
Few comments and suggestions for improvement:
- In my opinion, the title for the manuscript needs to be modified to include clearly that carbonated and non-carbonated specimen were studied, although the results from the carbonated concrete were not conclusive. A suggested modification:
Effect of Chloride on the Electrical Resistivity in Carbonated and Non-Carbonated Concrete - The manuscript needs considerable editing. Some sentences are not complete (e.g. Line 123), others are repeated throughout the manuscript without adding any new information (line 45 to 48 then 49 to 51).
- Whenever a ratio is reported (especially in Figures), the two parameters included in the ratio calculations need to be included (Figure 11,12, 15)
- Figure 12 is not discussed in the manuscript
- More details need to be included on the electrical resistivity measurement, such as the system used to measure the voltage drop, the current source and current magnitude, and how often the measurements were taken.
- In Figure 6 the pores are not visible. Since the pores play an important part of the study, clear visualization of the pore is essential.
- Figure 7 includes the volumetric fraction of capillary water in pore. How these values were calculated/measured? Please explain.
- How does the carbonation reduce porosity? Can you show micrographs of reduction of porosity due to carbonation? Alternatively, can you cite a reference that shows this process?
- Which experimental setup was used in this work? The one shown in Figure 3 or Figure 6?
- The title for Section 3.4. is not clear. Please reword.
- Is the carbonation depth of 5 to 8 mm is general criteria? Or is it only applicable for this work?
- Line 322-323, how future research is going to establish the effect of the two mechanisms? If there’s no clear path moving forward to address this issue, this sentence adds no useful information.
In general, the manuscript includes interesting results. However, it needs better organization and clarifying of some points before it can be recommended for publication.
Author Response
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Reviewer 2 Report
This paper investigates the effect of chloride on electrical resistivity in (non)carbonated concrete. The topic is of interest and the findings have added values to the field. My comments are listed as follows: 1. Did the authors fix the concentration of chloride ions in concrete. Please justify why chose this arrangement. 2. Chloride ions usually penetrated into concrete not per exist in the concrete. Please justify why chose premix chloride ions into concrete 3. It suggests the authors to shown the photos of carbonated and non-carbonated concrete specimens. 4. The authors varied the paste volume and aggregate volume fractions in the concrete mixes. This for sure will affect the pore structures of the concrete hence the carbonation and chloride penetrations. Please explain 5. Would the findings of this work be transferable if other concrete mixes are used. A more comprehensive discussions are needed to show the underlying mechanism. 6. A few opening sentences are needed for the conclusion part.Author Response
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Reviewer 3 Report
Congratulation to the authors of the paper!
In my opinion, this is a good paper and concludes after a large amount of work involved
Please, take into consideration, some editing issues into the lines: 101, 121, 177, 196, 244.
Best wishes!
Author Response
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Round 2
Reviewer 2 Report
The authors have properly addressed my comments. The paper is now recommended to be accepted by the journal.
