Exploring coffee extract as a renewable admixture to prepare mortars with better performance
Intending to decarbonize the chemical admixtures and promote the sustainable development of the construction industry, this paper investigated the feasibility of coffee extract as a renewable natural admixture to adjust the performance of cementitious materials. The influences of coffee extract with...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S221450952300058X |
| _version_ | 1797798935819976704 |
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| author | Yonghui Wang Jiasi Fang Jin Li Hu Fang Jiankai Xie Shangkun Li Jin Pan |
| author_facet | Yonghui Wang Jiasi Fang Jin Li Hu Fang Jiankai Xie Shangkun Li Jin Pan |
| author_sort | Yonghui Wang |
| collection | DOAJ |
| description | Intending to decarbonize the chemical admixtures and promote the sustainable development of the construction industry, this paper investigated the feasibility of coffee extract as a renewable natural admixture to adjust the performance of cementitious materials. The influences of coffee extract with various concentrations on the compressive strength, setting time, hydration properties and microstructure development of cementitious materials were studied. Results showed that both hydration promoting and hydration retarding effects were brought about when using the coffee extract as the mixing water in preparing cementitious materials. The hydration promotion was attributed to the polyphenols in the coffee extract, which functioned as a Ca2+ captor in the pore solution of pastes through a complexation mechanism. The complex of polyphenols-Ca may form the initial seeds for the promoted hydration of cementitious materials. A low concentration of the coffee extract (≤0.05%) exerted a prominent hydration promoting effect on the hydration of cement, while the hydration retarding effect gradually became apparent for a coffee extract with high concentrations. Overall, the compressive strength of cementitious mortars with 0.05% coffee extract was increased by 18.6% at 28d owing to the formation of more hydration products, a 25.1% reduction in porosity, and the thick Ca(OH)2 crystals. As a result, a 5% optimum concentration of coffee extract achieved the best economic and environmental benefits for cementitious mortars. This study contributes a new solution for sustainable development in the construction industry, as the coffee extract is low carbon, natural, non-toxic, renewable and can be a superior alternative to chemical admixtures. |
| first_indexed | 2024-03-13T04:12:23Z |
| format | Article |
| id | doaj.art-4b21ceff0d0e4e96ac3d7d8d2752c546 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-13T04:12:23Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-4b21ceff0d0e4e96ac3d7d8d2752c5462023-06-21T06:53:36ZengElsevierCase Studies in Construction Materials2214-50952023-07-0118e01879Exploring coffee extract as a renewable admixture to prepare mortars with better performanceYonghui Wang0Jiasi Fang1Jin Li2Hu Fang3Jiankai Xie4Shangkun Li5Jin Pan6School of Civil Engineering and Architecture, Anhui University of Science and Technology, Anhui 232001, ChinaSchool of Civil Engineering and Architecture, Anhui University of Science and Technology, Anhui 232001, ChinaSchool of Civil Engineering and Architecture, Anhui University of Science and Technology, Anhui 232001, China; Corresponding author.School of Civil Engineering and Architecture, Anhui University of Science and Technology, Anhui 232001, ChinaSchool of Civil Engineering and Architecture, Anhui University of Science and Technology, Anhui 232001, ChinaSchool of Civil Engineering and Architecture, Anhui University of Science and Technology, Anhui 232001, ChinaKey Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610000, ChinaIntending to decarbonize the chemical admixtures and promote the sustainable development of the construction industry, this paper investigated the feasibility of coffee extract as a renewable natural admixture to adjust the performance of cementitious materials. The influences of coffee extract with various concentrations on the compressive strength, setting time, hydration properties and microstructure development of cementitious materials were studied. Results showed that both hydration promoting and hydration retarding effects were brought about when using the coffee extract as the mixing water in preparing cementitious materials. The hydration promotion was attributed to the polyphenols in the coffee extract, which functioned as a Ca2+ captor in the pore solution of pastes through a complexation mechanism. The complex of polyphenols-Ca may form the initial seeds for the promoted hydration of cementitious materials. A low concentration of the coffee extract (≤0.05%) exerted a prominent hydration promoting effect on the hydration of cement, while the hydration retarding effect gradually became apparent for a coffee extract with high concentrations. Overall, the compressive strength of cementitious mortars with 0.05% coffee extract was increased by 18.6% at 28d owing to the formation of more hydration products, a 25.1% reduction in porosity, and the thick Ca(OH)2 crystals. As a result, a 5% optimum concentration of coffee extract achieved the best economic and environmental benefits for cementitious mortars. This study contributes a new solution for sustainable development in the construction industry, as the coffee extract is low carbon, natural, non-toxic, renewable and can be a superior alternative to chemical admixtures.http://www.sciencedirect.com/science/article/pii/S221450952300058XCoffee extractNatural admixtureCement hydrationCompressive strengthSustainability |
| spellingShingle | Yonghui Wang Jiasi Fang Jin Li Hu Fang Jiankai Xie Shangkun Li Jin Pan Exploring coffee extract as a renewable admixture to prepare mortars with better performance Case Studies in Construction Materials Coffee extract Natural admixture Cement hydration Compressive strength Sustainability |
| title | Exploring coffee extract as a renewable admixture to prepare mortars with better performance |
| title_full | Exploring coffee extract as a renewable admixture to prepare mortars with better performance |
| title_fullStr | Exploring coffee extract as a renewable admixture to prepare mortars with better performance |
| title_full_unstemmed | Exploring coffee extract as a renewable admixture to prepare mortars with better performance |
| title_short | Exploring coffee extract as a renewable admixture to prepare mortars with better performance |
| title_sort | exploring coffee extract as a renewable admixture to prepare mortars with better performance |
| topic | Coffee extract Natural admixture Cement hydration Compressive strength Sustainability |
| url | http://www.sciencedirect.com/science/article/pii/S221450952300058X |
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