Influence of Ceramsite with Assembly Unit of Sludge and Excavated Soil on the Properties of Cement Concrete
The application of sludge in the manufacture of ceramic material provides an outlet for waste disposal. In this study, we aimed to produce a new lightweight aggregate applications in concrete. The influence of burning temperature on the ignition loss rate, cylinder compressive strength, and the wate...
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MDPI AG
2022-04-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/9/3164 |
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| author | Jiahui Wang Shiyu Wang Hui Wang Zhimin He |
| author_facet | Jiahui Wang Shiyu Wang Hui Wang Zhimin He |
| author_sort | Jiahui Wang |
| collection | DOAJ |
| description | The application of sludge in the manufacture of ceramic material provides an outlet for waste disposal. In this study, we aimed to produce a new lightweight aggregate applications in concrete. The influence of burning temperature on the ignition loss rate, cylinder compressive strength, and the water absorption rate of ceramsite mixed with sludge and excavated soil was investigated. The slump flow, apparent density, and mechanical strength (flexural and compressive strengths) of cement concrete with ceramsite were determined. Moreover, the chloride ion permeability coefficient and the thermal conductivity were tested. Finally, scanning electron microscopy, X-ray diffraction, and thermal analysis were applied to analyze the mechanisms of the properties of ceramsite. Results show that the ignition loss rate and the burning temperature are in a quadratic relationship. The cylinder compressive strength shows a positive quadratic relationship with the burning temperature. However, the water absorption rate negatively correlates with the burning temperature. The addition of sludge can increase the ignition loss rate and cylinder compressive strength of ceramsite. Meanwhile, the effect of sludge on the water absorption rate is the opposite. Ceramsite decreases the slump flow and the apparent density of cement concrete. Cement concrete with 10% ceramsite shows the highest mechanical strength and the lowest chloride ion migration coefficient. Correction of the chloride ion migration coefficient and the content of ceramsite was performed as an exponential equation. Ceramsite exerts a negative effect on the thermal conductivity of cement concrete. Concrete with sludge ceramsite shows higher slump flow, apparent density, mechanical strength, and resistance to chloride ion penetration and thermal conductivity than concrete sludge with clay ceramsite. The mullite content of sludge ceramsite is higher than that of clay ceramsite. Additionally, sludge ceramsite exhibits a denser structure than that of clay ceramsite. |
| first_indexed | 2024-03-10T03:58:21Z |
| format | Article |
| id | doaj.art-46d1b83f07604125b16d22def0015dd1 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T03:58:21Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-46d1b83f07604125b16d22def0015dd12023-11-23T08:39:08ZengMDPI AGMaterials1996-19442022-04-01159316410.3390/ma15093164Influence of Ceramsite with Assembly Unit of Sludge and Excavated Soil on the Properties of Cement ConcreteJiahui Wang0Shiyu Wang1Hui Wang2Zhimin He3College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, ChinaSchool of Civil and Environmental Engineering, Ningbo University, Ningbo 315000, ChinaSchool of Civil and Environmental Engineering, Ningbo University, Ningbo 315000, ChinaSchool of Civil and Environmental Engineering, Ningbo University, Ningbo 315000, ChinaThe application of sludge in the manufacture of ceramic material provides an outlet for waste disposal. In this study, we aimed to produce a new lightweight aggregate applications in concrete. The influence of burning temperature on the ignition loss rate, cylinder compressive strength, and the water absorption rate of ceramsite mixed with sludge and excavated soil was investigated. The slump flow, apparent density, and mechanical strength (flexural and compressive strengths) of cement concrete with ceramsite were determined. Moreover, the chloride ion permeability coefficient and the thermal conductivity were tested. Finally, scanning electron microscopy, X-ray diffraction, and thermal analysis were applied to analyze the mechanisms of the properties of ceramsite. Results show that the ignition loss rate and the burning temperature are in a quadratic relationship. The cylinder compressive strength shows a positive quadratic relationship with the burning temperature. However, the water absorption rate negatively correlates with the burning temperature. The addition of sludge can increase the ignition loss rate and cylinder compressive strength of ceramsite. Meanwhile, the effect of sludge on the water absorption rate is the opposite. Ceramsite decreases the slump flow and the apparent density of cement concrete. Cement concrete with 10% ceramsite shows the highest mechanical strength and the lowest chloride ion migration coefficient. Correction of the chloride ion migration coefficient and the content of ceramsite was performed as an exponential equation. Ceramsite exerts a negative effect on the thermal conductivity of cement concrete. Concrete with sludge ceramsite shows higher slump flow, apparent density, mechanical strength, and resistance to chloride ion penetration and thermal conductivity than concrete sludge with clay ceramsite. The mullite content of sludge ceramsite is higher than that of clay ceramsite. Additionally, sludge ceramsite exhibits a denser structure than that of clay ceramsite.https://www.mdpi.com/1996-1944/15/9/3164sludgeceramsiteignition loss ratemechanical strengthschloride ion migration coefficientthermal conductivity |
| spellingShingle | Jiahui Wang Shiyu Wang Hui Wang Zhimin He Influence of Ceramsite with Assembly Unit of Sludge and Excavated Soil on the Properties of Cement Concrete Materials sludge ceramsite ignition loss rate mechanical strengths chloride ion migration coefficient thermal conductivity |
| title | Influence of Ceramsite with Assembly Unit of Sludge and Excavated Soil on the Properties of Cement Concrete |
| title_full | Influence of Ceramsite with Assembly Unit of Sludge and Excavated Soil on the Properties of Cement Concrete |
| title_fullStr | Influence of Ceramsite with Assembly Unit of Sludge and Excavated Soil on the Properties of Cement Concrete |
| title_full_unstemmed | Influence of Ceramsite with Assembly Unit of Sludge and Excavated Soil on the Properties of Cement Concrete |
| title_short | Influence of Ceramsite with Assembly Unit of Sludge and Excavated Soil on the Properties of Cement Concrete |
| title_sort | influence of ceramsite with assembly unit of sludge and excavated soil on the properties of cement concrete |
| topic | sludge ceramsite ignition loss rate mechanical strengths chloride ion migration coefficient thermal conductivity |
| url | https://www.mdpi.com/1996-1944/15/9/3164 |
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