Investigation of mechanical properties and hydration of low-carbon magnesium and calcium-rich waste powder geopolymer paste
Magnesium and calcium-rich waste powder (MWP) has the potential to be a low-carbon geopolymer cementitious material. This study investigates the mechanical properties and hydration products of low-carbon magnesium and calcium-rich waste powder geopolymer paste (LMWP). The influences of alkali conten...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-12-01
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| Series: | Journal of CO2 Utilization |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2212982024003196 |
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| author | Changming Li Xudong Yang Dongyang Jia Shunbo Zhao Guanfeng Liu Yaozong Wang Wanjiao Li Wenyu Song |
| author_facet | Changming Li Xudong Yang Dongyang Jia Shunbo Zhao Guanfeng Liu Yaozong Wang Wanjiao Li Wenyu Song |
| author_sort | Changming Li |
| collection | DOAJ |
| description | Magnesium and calcium-rich waste powder (MWP) has the potential to be a low-carbon geopolymer cementitious material. This study investigates the mechanical properties and hydration products of low-carbon magnesium and calcium-rich waste powder geopolymer paste (LMWP). The influences of alkali content, calcination temperature, mix proportions of raw materials and curing temperature on the compressive strength and hydration of LMWP were examined. The mechanical properties of LMWP were systematically evaluated by assessing setting time, fluidity, and compressive strength, while the pore structure was analyzed using mercury intrusion porosimetry (MIP). The hydration products and microstructures of LMWP were investigated by XRD, TG-DTG, and SEM-EDS. The results indicated that incorporating 1 % NaOH significantly enhanced the compressive strength of LMWP, whereas thermally activated MWP (800 ℃, 900 ℃) negatively affected compressive strength development. The addition of slag facilitated the reaction of MWP and improved the compressive strength of LMWP. When the slag incorporation reached 40 %, the specimen demonstrated optimal performance with a compressive strength of 27.8 MPa. The pore diameter was predominantly distributed around 10 nm, indicating well-structured porosity. Microstructural analysis revealed that the hydration products are dense calcium magnesium silicate gels (C-M-S-H), which significantly enhanced the compressive strength and optimized pore structure of LMWP. The efficiency of carbon emission reduction achieved by LMWP was evaluated. The findings indicate that, compared to traditional cement-based materials, LMWP reduces cement consumption by over 60 %, significantly decreasing CO2 emissions. This study innovatively utilizes MWP to prepare green and low-carbon geopolymer paste materials, with the aim of replacing cement applications in the construction industry, thereby reducing carbon emissions. It explores new avenues for the low-carbon and green development of the civil engineering sector and contributes to efforts in addressing the global climate crisis. |
| format | Article |
| id | doaj-art-a992730ffa4b46009e4c51f3c98d4c79 |
| institution | Kabale University |
| issn | 2212-9839 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of CO2 Utilization |
| spelling | doaj-art-a992730ffa4b46009e4c51f3c98d4c792024-12-19T10:54:02ZengElsevierJournal of CO2 Utilization2212-98392024-12-0190102984Investigation of mechanical properties and hydration of low-carbon magnesium and calcium-rich waste powder geopolymer pasteChangming Li0Xudong Yang1Dongyang Jia2Shunbo Zhao3Guanfeng Liu4Yaozong Wang5Wanjiao Li6Wenyu Song7North China University of Water Resource and Electric Power, Zhengzhou 450045, China; International Joint Research Lab for Eco-Building Materials and Engineering of Henan, North China University of Water Resources and Electric Power, Zhengzhou 450045, China; Corresponding author at: North China University of Water Resource and Electric Power, Zhengzhou 450045, China.North China University of Water Resource and Electric Power, Zhengzhou 450045, ChinaNorth China University of Water Resource and Electric Power, Zhengzhou 450045, ChinaInternational Joint Research Lab for Eco-Building Materials and Engineering of Henan, North China University of Water Resources and Electric Power, Zhengzhou 450045, ChinaNorth China University of Water Resource and Electric Power, Zhengzhou 450045, ChinaNorth China University of Water Resource and Electric Power, Zhengzhou 450045, ChinaWater Resources Research Institute of Inner Mongolia Autonomous Region, Hohhot 010020, China; Corresponding author.Guangdong GW Metal Industry Group Co., LTD., Guangzhou 510050, China; Yunfu Hongyuan Green Building Materials Co., LTD., Yunfu 527300, ChinaMagnesium and calcium-rich waste powder (MWP) has the potential to be a low-carbon geopolymer cementitious material. This study investigates the mechanical properties and hydration products of low-carbon magnesium and calcium-rich waste powder geopolymer paste (LMWP). The influences of alkali content, calcination temperature, mix proportions of raw materials and curing temperature on the compressive strength and hydration of LMWP were examined. The mechanical properties of LMWP were systematically evaluated by assessing setting time, fluidity, and compressive strength, while the pore structure was analyzed using mercury intrusion porosimetry (MIP). The hydration products and microstructures of LMWP were investigated by XRD, TG-DTG, and SEM-EDS. The results indicated that incorporating 1 % NaOH significantly enhanced the compressive strength of LMWP, whereas thermally activated MWP (800 ℃, 900 ℃) negatively affected compressive strength development. The addition of slag facilitated the reaction of MWP and improved the compressive strength of LMWP. When the slag incorporation reached 40 %, the specimen demonstrated optimal performance with a compressive strength of 27.8 MPa. The pore diameter was predominantly distributed around 10 nm, indicating well-structured porosity. Microstructural analysis revealed that the hydration products are dense calcium magnesium silicate gels (C-M-S-H), which significantly enhanced the compressive strength and optimized pore structure of LMWP. The efficiency of carbon emission reduction achieved by LMWP was evaluated. The findings indicate that, compared to traditional cement-based materials, LMWP reduces cement consumption by over 60 %, significantly decreasing CO2 emissions. This study innovatively utilizes MWP to prepare green and low-carbon geopolymer paste materials, with the aim of replacing cement applications in the construction industry, thereby reducing carbon emissions. It explores new avenues for the low-carbon and green development of the civil engineering sector and contributes to efforts in addressing the global climate crisis.http://www.sciencedirect.com/science/article/pii/S2212982024003196Low carbonMagnesium and calcium-rich waste powderGeopolymer pasteMechanical propertiesMicrostructure |
| spellingShingle | Changming Li Xudong Yang Dongyang Jia Shunbo Zhao Guanfeng Liu Yaozong Wang Wanjiao Li Wenyu Song Investigation of mechanical properties and hydration of low-carbon magnesium and calcium-rich waste powder geopolymer paste Journal of CO2 Utilization Low carbon Magnesium and calcium-rich waste powder Geopolymer paste Mechanical properties Microstructure |
| title | Investigation of mechanical properties and hydration of low-carbon magnesium and calcium-rich waste powder geopolymer paste |
| title_full | Investigation of mechanical properties and hydration of low-carbon magnesium and calcium-rich waste powder geopolymer paste |
| title_fullStr | Investigation of mechanical properties and hydration of low-carbon magnesium and calcium-rich waste powder geopolymer paste |
| title_full_unstemmed | Investigation of mechanical properties and hydration of low-carbon magnesium and calcium-rich waste powder geopolymer paste |
| title_short | Investigation of mechanical properties and hydration of low-carbon magnesium and calcium-rich waste powder geopolymer paste |
| title_sort | investigation of mechanical properties and hydration of low carbon magnesium and calcium rich waste powder geopolymer paste |
| topic | Low carbon Magnesium and calcium-rich waste powder Geopolymer paste Mechanical properties Microstructure |
| url | http://www.sciencedirect.com/science/article/pii/S2212982024003196 |
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