Effect of Coffee Grounds/Coffee Ground Biochar on Cement Hydration and Adsorption Properties
Taking advantage of the strong adsorption characteristics of coffee grounds (CGs) and coffee ground biochar (CGB), this research employed equal amounts of 2%, 4%, 6%, and 8% CGs and CGB to replace cement. This study thereby examined the impacts of CGs and CGB on cement compressive strength, as well...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-02-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/17/4/907 |
| _version_ | 1797297611804246016 |
|---|---|
| author | Yang Chen Rongxin Guo Feiyue Ma Haoxue Zhou Miao Zhang Qianmin Ma |
| author_facet | Yang Chen Rongxin Guo Feiyue Ma Haoxue Zhou Miao Zhang Qianmin Ma |
| author_sort | Yang Chen |
| collection | DOAJ |
| description | Taking advantage of the strong adsorption characteristics of coffee grounds (CGs) and coffee ground biochar (CGB), this research employed equal amounts of 2%, 4%, 6%, and 8% CGs and CGB to replace cement. This study thereby examined the impacts of CGs and CGB on cement compressive strength, as well as their abilities to adsorb chloride ions and formaldehyde. X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TG−DTG), scanning electron microscopy (SEM), and X−ray photoelectron spectroscopy (XPS) were employed to investigate the hydration mechanism and characterize the microscopic structure. The results show the following: (1) The presence of a substantial quantity of organic compounds in CGs is found to have an adverse effect on both the compressive strength and hydration degree of the sample. The use of CGB after high-temperature pyrolysis of phosphoric acid can effectively improve the negative impact of organic compounds on the sample. (2) The addition of CGs reduces the adsorption of chloride ions by cement, primarily due to the presence of fewer hydration products. However, when CGB was incorporated into cement, it enhanced the ability to adsorb chloride ions. (3) Cement containing 8% CGB content can slightly enhance the adsorption of formaldehyde. However, the cement sample with 8% CGB content exhibited the most significant ability to adsorb formaldehyde. |
| first_indexed | 2024-03-07T22:23:16Z |
| format | Article |
| id | doaj.art-e4dbc938492a40e79cb67598bae316cf |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-07T22:23:16Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-e4dbc938492a40e79cb67598bae316cf2024-02-23T15:25:45ZengMDPI AGMaterials1996-19442024-02-0117490710.3390/ma17040907Effect of Coffee Grounds/Coffee Ground Biochar on Cement Hydration and Adsorption PropertiesYang Chen0Rongxin Guo1Feiyue Ma2Haoxue Zhou3Miao Zhang4Qianmin Ma5Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, ChinaFaculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, ChinaFaculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, ChinaFaculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, ChinaFaculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, ChinaFaculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, ChinaTaking advantage of the strong adsorption characteristics of coffee grounds (CGs) and coffee ground biochar (CGB), this research employed equal amounts of 2%, 4%, 6%, and 8% CGs and CGB to replace cement. This study thereby examined the impacts of CGs and CGB on cement compressive strength, as well as their abilities to adsorb chloride ions and formaldehyde. X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TG−DTG), scanning electron microscopy (SEM), and X−ray photoelectron spectroscopy (XPS) were employed to investigate the hydration mechanism and characterize the microscopic structure. The results show the following: (1) The presence of a substantial quantity of organic compounds in CGs is found to have an adverse effect on both the compressive strength and hydration degree of the sample. The use of CGB after high-temperature pyrolysis of phosphoric acid can effectively improve the negative impact of organic compounds on the sample. (2) The addition of CGs reduces the adsorption of chloride ions by cement, primarily due to the presence of fewer hydration products. However, when CGB was incorporated into cement, it enhanced the ability to adsorb chloride ions. (3) Cement containing 8% CGB content can slightly enhance the adsorption of formaldehyde. However, the cement sample with 8% CGB content exhibited the most significant ability to adsorb formaldehyde.https://www.mdpi.com/1996-1944/17/4/907chloride ion adsorption abilityformaldehyde adsorption abilitycompressive strengthcoffee ground biocharcement |
| spellingShingle | Yang Chen Rongxin Guo Feiyue Ma Haoxue Zhou Miao Zhang Qianmin Ma Effect of Coffee Grounds/Coffee Ground Biochar on Cement Hydration and Adsorption Properties Materials chloride ion adsorption ability formaldehyde adsorption ability compressive strength coffee ground biochar cement |
| title | Effect of Coffee Grounds/Coffee Ground Biochar on Cement Hydration and Adsorption Properties |
| title_full | Effect of Coffee Grounds/Coffee Ground Biochar on Cement Hydration and Adsorption Properties |
| title_fullStr | Effect of Coffee Grounds/Coffee Ground Biochar on Cement Hydration and Adsorption Properties |
| title_full_unstemmed | Effect of Coffee Grounds/Coffee Ground Biochar on Cement Hydration and Adsorption Properties |
| title_short | Effect of Coffee Grounds/Coffee Ground Biochar on Cement Hydration and Adsorption Properties |
| title_sort | effect of coffee grounds coffee ground biochar on cement hydration and adsorption properties |
| topic | chloride ion adsorption ability formaldehyde adsorption ability compressive strength coffee ground biochar cement |
| url | https://www.mdpi.com/1996-1944/17/4/907 |
| work_keys_str_mv | AT yangchen effectofcoffeegroundscoffeegroundbiocharoncementhydrationandadsorptionproperties AT rongxinguo effectofcoffeegroundscoffeegroundbiocharoncementhydrationandadsorptionproperties AT feiyuema effectofcoffeegroundscoffeegroundbiocharoncementhydrationandadsorptionproperties AT haoxuezhou effectofcoffeegroundscoffeegroundbiocharoncementhydrationandadsorptionproperties AT miaozhang effectofcoffeegroundscoffeegroundbiocharoncementhydrationandadsorptionproperties AT qianminma effectofcoffeegroundscoffeegroundbiocharoncementhydrationandadsorptionproperties |