Carbonation Resistance of Mortar Mixed with Electrolysis Alkaline Aqueous Solution and Blast Furnace Slag
Cement production is the primary source of global CO<sub>2</sub> emissions in the construction industry. Blast furnace slag (BFS) has been examined as a potential substitute for cement to reduce CO<sub>2</sub> emissions. In addition, this substitution increases the long-term...
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MDPI AG
2023-01-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/2/900 |
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| author | Sumi Jeong Jusung Kim Hojin Kim Sungyu Park |
| author_facet | Sumi Jeong Jusung Kim Hojin Kim Sungyu Park |
| author_sort | Sumi Jeong |
| collection | DOAJ |
| description | Cement production is the primary source of global CO<sub>2</sub> emissions in the construction industry. Blast furnace slag (BFS) has been examined as a potential substitute for cement to reduce CO<sub>2</sub> emissions. In addition, this substitution increases the long-term strength and improves the chemical resistance of mortar. However, a glassy film is formed on the surface of BFS while it is generated as a byproduct, lowering the initial strength of mortar. Notably, this film is destroyed in an alkaline environment. Thus, several studies have used solutions with various alkali activators. However, alkali activators are unsafe, as they are strong alkaline materials, and have low economic efficiency. This study experimentally improved the initial hydration reactivity of a mortar containing BFS as a substitute for cement, thereby improving its initial strength. We observed an increase in carbonation resistance. In addition, this study focused on evaluating the compressive strength and carbonation resistance of mortar prepared using BFS and alkaline water obtained from the electrolysis of a K<sub>2</sub>CO<sub>3</sub> electrolyte. Results show that alkali-activated mortar using an electrolyzed alkaline aqueous solution has higher strength and contains more hydration products than that using conventional mixing water. |
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| id | doaj.art-a4c765c8968b4b4ebea20a780db612e2 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T13:44:26Z |
| publishDate | 2023-01-01 |
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| spelling | doaj.art-a4c765c8968b4b4ebea20a780db612e22023-11-30T21:03:11ZengMDPI AGApplied Sciences2076-34172023-01-0113290010.3390/app13020900Carbonation Resistance of Mortar Mixed with Electrolysis Alkaline Aqueous Solution and Blast Furnace SlagSumi Jeong0Jusung Kim1Hojin Kim2Sungyu Park3Department of Architectural, Mokwon University, 88 Doanbukro, Seogu, Daejeon 35349, Republic of KoreaDepartment of Architectural, Mokwon University, 88 Doanbukro, Seogu, Daejeon 35349, Republic of KoreaDepartment of Architectural, Mokwon University, 88 Doanbukro, Seogu, Daejeon 35349, Republic of KoreaDepartment of Architectural, Mokwon University, 88 Doanbukro, Seogu, Daejeon 35349, Republic of KoreaCement production is the primary source of global CO<sub>2</sub> emissions in the construction industry. Blast furnace slag (BFS) has been examined as a potential substitute for cement to reduce CO<sub>2</sub> emissions. In addition, this substitution increases the long-term strength and improves the chemical resistance of mortar. However, a glassy film is formed on the surface of BFS while it is generated as a byproduct, lowering the initial strength of mortar. Notably, this film is destroyed in an alkaline environment. Thus, several studies have used solutions with various alkali activators. However, alkali activators are unsafe, as they are strong alkaline materials, and have low economic efficiency. This study experimentally improved the initial hydration reactivity of a mortar containing BFS as a substitute for cement, thereby improving its initial strength. We observed an increase in carbonation resistance. In addition, this study focused on evaluating the compressive strength and carbonation resistance of mortar prepared using BFS and alkaline water obtained from the electrolysis of a K<sub>2</sub>CO<sub>3</sub> electrolyte. Results show that alkali-activated mortar using an electrolyzed alkaline aqueous solution has higher strength and contains more hydration products than that using conventional mixing water.https://www.mdpi.com/2076-3417/13/2/900blast furnace slagelectrolysis alkaline aqueoushydration reactioncarbonation resistance |
| spellingShingle | Sumi Jeong Jusung Kim Hojin Kim Sungyu Park Carbonation Resistance of Mortar Mixed with Electrolysis Alkaline Aqueous Solution and Blast Furnace Slag Applied Sciences blast furnace slag electrolysis alkaline aqueous hydration reaction carbonation resistance |
| title | Carbonation Resistance of Mortar Mixed with Electrolysis Alkaline Aqueous Solution and Blast Furnace Slag |
| title_full | Carbonation Resistance of Mortar Mixed with Electrolysis Alkaline Aqueous Solution and Blast Furnace Slag |
| title_fullStr | Carbonation Resistance of Mortar Mixed with Electrolysis Alkaline Aqueous Solution and Blast Furnace Slag |
| title_full_unstemmed | Carbonation Resistance of Mortar Mixed with Electrolysis Alkaline Aqueous Solution and Blast Furnace Slag |
| title_short | Carbonation Resistance of Mortar Mixed with Electrolysis Alkaline Aqueous Solution and Blast Furnace Slag |
| title_sort | carbonation resistance of mortar mixed with electrolysis alkaline aqueous solution and blast furnace slag |
| topic | blast furnace slag electrolysis alkaline aqueous hydration reaction carbonation resistance |
| url | https://www.mdpi.com/2076-3417/13/2/900 |
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