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      The effect of Caspian Sea water on mechanical properties and durability of concrete containing rice husk ash, nano $$ {\varvec{\hbox {SiO}_2}}$$ , and nano $$ {\varvec{{\hbox {Al}}_{2}{\hbox {O}}_{3}}}$$

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          Abstract

          Various studies have been recently conducted aiming at developing more sustainable cementitious systems so that concrete structures may not have a negative effect on the environment and are decomposed. It has been attempted to build sustainable binders by substituting silica fume, cement with fly ash, nano-silica, nano-alumina, and rice husk ash. In this paper, a series of experiments on concrete with different contents of rice husk ash (10%, 15%, and 20%), nano \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${{\hbox {SiO}_2}}$$\end{document} (1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%), and nano \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Al}_{2}{\hbox {O}}_{3}$$\end{document} (1%, 2%, 3%, 4%) are performed to analyze the durability and mechanical properties of samples under the curing condition of Caspian seawater. The workability, density, water penetration, chloride ion penetration, and compressive strength (at 7, 14, 28, and 90 day) of the samples were determined. The experimental results showed that workability decreased gradually with increasing additives content, while the compressive gradually increased. Among the additives, adding 8% of the nano \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${{\hbox {SiO}_2}}$$\end{document} had the most significant effect on the improvement of compressive strength. Adding 8% nano \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${{\hbox {SiO}_2}}$$\end{document} and 4% nano \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Al}_{2}{\hbox {O}}_{3}$$\end{document} reduced the depth of water permeability by 53% and 30%, respectively. Furthermore, adding 8% nano \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${{\hbox {SiO}_2}}$$\end{document} reduced chloride ion penetration by 85%.

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          Influence of amount of recycled coarse aggregates and production process on properties of recycled aggregate concrete

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            CARBON DIOXIDE EMISSIONS FROM THE GLOBAL CEMENT INDUSTRY

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              Preliminary study on the water permeability and microstructure of concrete incorporating nano-SiO2

              Tao Ji (2005)
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                Author and article information

                Contributors
                seyed-morteza.seyedpour@isd.uni-stuttgart.de
                Journal
                Sci Rep
                Sci Rep
                Scientific Reports
                Nature Publishing Group UK (London )
                2045-2322
                23 November 2022
                23 November 2022
                2022
                : 12
                : 20202
                Affiliations
                [1 ]GRID grid.5719.a, ISNI 0000 0004 1936 9713, Institute of Structural Mechanics and Dynamics in Aerospace Engineering, Faculty of Aerospace Engineering and Geodesy, , University of Stuttgart, ; Pfaffenwaldring 27, 70569 Stuttgart, Germany
                [2 ]GRID grid.5719.a, ISNI 0000 0004 1936 9713, Porous Media Lab, Institute of Structural Mechanics and Dynamics in Aerospace Engineering, Faculty of Aerospace Engineering and Geodesy, , University of Stuttgart, ; Pfaffenwaldring 27, 70569 Stuttgart, Germany
                Article
                24304
                10.1038/s41598-022-24304-4
                9684505
                36418398
                0efc5df7-0ab3-47b0-afbc-55ecdd71d88e
                © The Author(s) 2022

                Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

                History
                : 23 June 2022
                : 14 November 2022
                Funding
                Funded by: Universität Stuttgart (1023)
                Categories
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                © The Author(s) 2022

                Uncategorized
                civil engineering,structural materials
                Uncategorized
                civil engineering, structural materials

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