Sustainable Non-Conventional Concrete 3D Printing—A Review
Round 1
Reviewer 1 Report
This paper reviews several sustainable non-conventional concrete 3D printing techniques. The topic in this article includes (1) The sustainable AM of concrete and sustainable materials. (2) The transition from scale 3D printing to full-size printing in buildings. (3) Concrete digital production using 3D printing. (4) Several drawbacks in concrete 3D printing. The reviewer agrees that this manuscript concludes with a scope of potential developments for 3D printing concrete in the area of concrete 3D printing by considering sustainability. The reviewer recommends that the authors can clarify the following issues:
- Please add line numbers in the manuscript, or it is difficult for the reviewer to specify the problem that exists in this manuscript.
- Page 1, if the author decides to use a glossary of items, please arrange the first letters of the terms in alphabetical order.
- Page 1, line 6, please specify what is “AM” means when the term first appears in the manuscript other than later. If in the Abstract, please spell out acronyms directly.
- Page 4, the paragraph is not aligned with the same location of the paper, as shown on Page 3. Please make the whole manuscript uniform.
- Page 21, please explain MgO. Please use the uniform unit. It appears as “SQFT,” “Square Feet,” and “square-foot” in the context.
- Page 22, What is the difference between one dot and two dots on this page? Again, use the uniform unit. It appears “rupees,” “Indian Rupees,” ”Rs,” ”rials,” ”Rs,” and ”$” etc. in this manuscript.
- The yellow color appears on Page 24. What is that mean?
- Page 26, there are two equations that lack numbers (Equation (2) and (3)).
- Page 27, please add equation numbers for all equations.
- Page 37, Figure 9, the steel should be yielded at first (0.00207), then the steel stress-strain relationship should be in a plateau, but it is impossible to a straight line. The stress should be increased a little bit.
- Page 45, please rearrange the conclusion part of this paper to distinguish what conclusions are from the authors and what conclusions are from the other references.
Finally, the reviewer will give the following suggestions for the authors. (1) Please ensure that all the font types and sizes in one Figure are unified. (2) Please check the grammar errors and typos in this manuscript. (3) The resolution is also essential in improving the paper acceptance rate for a high-quality paper. When adding notation (words, numbers) to an original paper, it is better to be edited in Microsoft software (PowerPoint or Word) and group them. Then, insert it into Microsoft Word. In this way, the resolution of the notation shown in each Figure will have the same resolution as the words in this paper.
Some grammar errors and edit problems, including format in the context, font size, and font type in Tables and Figures, must be revised carefully before this manuscript can be accepted.
Author Response
The authors express their sincere appreciation for the valuable comments provided by the reviewer. They acknowledge the insightful feedback and are grateful for the time and effort invested in reviewing their work. All the comments have been addressed as pe the best of the knowledge and capacity.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
Incorporate all the suggestions!
Comments for author File: Comments.pdf
Author Response
The authors express their sincere appreciation for the valuable comments provided by the reviewer. They acknowledge the insightful feedback and are grateful for the time and effort invested in reviewing their work. All the comments have been addressed as per the best of the knowledge and capacity.
Author Response File: Author Response.pdf
Reviewer 3 Report
Dear Author,
Your work is very strong objectivity, originality, and scientifically sound preparation are just some of the reasons it's so fascinating. Thanks for choosing this journal.
It would be helpful if you could make the necessary changes to the comments and then resubmit them for your consideration.
Review comments to the author (sustainability-2421257)
In this manuscript, the author wrote an article entitled “Sustainable non-conventional concrete 3D printing - A review” suitable for publication, but the concerned author has to rectify the below-mentioned minor review comments in the “Sustainability”.
After rectifying the following reviewer comments, this article may accept. However, please rectify the following,
1. What kinds of restrictions apply when printing concrete using a 3D printer?
2. What are some of the characteristics of concrete that has been printed using a 3D printer?
3. Which of the following is not a building material that can be used in the construction of structures that have been 3D printed?
4. What are the key differences between traditional printing and 3D printing?
5. What are some of the obstacles that need to be overcome when printing with concrete?
6. What kind of effects does 3D printing have on the natural environment when it's used in building?
7. Is the advent of 3D printing going to revolutionize the fashion industry?
8. Which type of material used in 3D printing is the least harmful to the environment?
9. What distinguishes geopolymer from cement in terms of its properties?
10. What exactly is considered to be the norm for geopolymer concrete in India?
11. Is there a study being done on whether or not the use of 3D printing in the construction industry is more effective than the more traditional methods in terms of both time and money?
12. What are the benefits of using 3D printing rather than traditional methods of prototyping or manufacturing?
13. What kinds of characteristics does UHPC have? What kind of a lifespan can you expect from Ultra High-Performance Concrete?
14. What are some of the advantages of using components that have been printed using three-dimensional printing in this work?
15. Why is the use of 3D printing so important in fields such as robotics, aerospace, and automotive manufacturing?
16. Why is 3D printing going to be such a big deal in the world of technology in the future?
17. According to the classification system developed by Hopkinson and Dickens, what are the most important AM processes?
It would be best if you rectify the above comments and submit them once again for your expectation.
Author Response
The authors express their sincere appreciation for the valuable comments provided by the reviewer. They acknowledge the insightful feedback and are grateful for the time and effort invested in reviewing their work. All the comments have been addressed as per the best of the knowledge and capacity.
Author Response File: Author Response.pdf
Round 2
Reviewer 2 Report
In table 4, Please add references also row wise.
Conclusion section is quite lengthy, if possible, short it.
Rest all seems fine.
Author Response
Dear Reviewer,
On behalf of all the authors, I really appreaciate your effort for taking time to review the manuscript and giving us the suggetions. All the suggestions have been incorporated in the article, please find below the updates manuscript and response to the comments.,
Author Response File: Author Response.pdf
