Cargando…

Improvement of CO(2)-Cured Sludge Ceramsite on the Mechanical Performances and Corrosion Resistance of Cement Concrete

The application of CO(2) curing on sludge ceramsite may improve its mechanical properties, and then increase the corresponding corrosion resistance. In this study, the influence of CO(2)-cured sludge ceramsite on the strength and long-term properties of cement concrete is investigated. CO(2) curing...

Descripción completa

Detalles Bibliográficos
Autores principales: Xu, Feng, Chang, Rencai, Zhang, Dongling, Liang, Zhao, Wang, Kewei, Wang, Hui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9413820/
https://www.ncbi.nlm.nih.gov/pubmed/36013891
http://dx.doi.org/10.3390/ma15165758
_version_ 1784775844014587904
author Xu, Feng
Chang, Rencai
Zhang, Dongling
Liang, Zhao
Wang, Kewei
Wang, Hui
author_facet Xu, Feng
Chang, Rencai
Zhang, Dongling
Liang, Zhao
Wang, Kewei
Wang, Hui
author_sort Xu, Feng
collection PubMed
description The application of CO(2) curing on sludge ceramsite may improve its mechanical properties, and then increase the corresponding corrosion resistance. In this study, the influence of CO(2)-cured sludge ceramsite on the strength and long-term properties of cement concrete is investigated. CO(2) curing time ranges from 0 h to 2 d. The cylinder compressive strength and water absorption rate of CO(2)-cured sludge ceramsite are first determined. Additionally, the flexural and compressive strengths, the chloride permeability and the freeze—thaw damage, as well as the corresponding thermal conductivity of cement concrete, are tested. Furthermore, the corrosion resistance of reinforcement inner-sludge-ceramsite cement concrete is measured. Finally, the scanning electron microscope photos of sludge ceramsite are obtained. Results show that the cylinder compressive strength of CO(2)-cured sludge ceramsite is 15.1, ~34.2% higher than that of sludge ceramsite. Meanwhile, the water absorption rate of CO(2)-cured sludge ceramsite is 39.6, ~82.4% higher than that of sludge ceramsite. The compressive strength and the flexural strength of cement concrete with CO(2)-cured sludge ceramsite are 11.4 and 18.7, ~21.6% and ~31.5% higher than the cement concrete with sludge ceramsite, respectively. The resistance of NaCl freeze—thaw cycles, determined by comparing the mass loss rate and the loss rates of mechanical strengths, is effectively improved by CO(2) curing, while the thermal conductivity of cement concrete is decreased by CO(2) curing. The corrosion resistance of inner reinforcement is improved by the application of CO(2) curing on sludge ceramsite.
format Online
Article
Text
id pubmed-9413820
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-94138202022-08-27 Improvement of CO(2)-Cured Sludge Ceramsite on the Mechanical Performances and Corrosion Resistance of Cement Concrete Xu, Feng Chang, Rencai Zhang, Dongling Liang, Zhao Wang, Kewei Wang, Hui Materials (Basel) Article The application of CO(2) curing on sludge ceramsite may improve its mechanical properties, and then increase the corresponding corrosion resistance. In this study, the influence of CO(2)-cured sludge ceramsite on the strength and long-term properties of cement concrete is investigated. CO(2) curing time ranges from 0 h to 2 d. The cylinder compressive strength and water absorption rate of CO(2)-cured sludge ceramsite are first determined. Additionally, the flexural and compressive strengths, the chloride permeability and the freeze—thaw damage, as well as the corresponding thermal conductivity of cement concrete, are tested. Furthermore, the corrosion resistance of reinforcement inner-sludge-ceramsite cement concrete is measured. Finally, the scanning electron microscope photos of sludge ceramsite are obtained. Results show that the cylinder compressive strength of CO(2)-cured sludge ceramsite is 15.1, ~34.2% higher than that of sludge ceramsite. Meanwhile, the water absorption rate of CO(2)-cured sludge ceramsite is 39.6, ~82.4% higher than that of sludge ceramsite. The compressive strength and the flexural strength of cement concrete with CO(2)-cured sludge ceramsite are 11.4 and 18.7, ~21.6% and ~31.5% higher than the cement concrete with sludge ceramsite, respectively. The resistance of NaCl freeze—thaw cycles, determined by comparing the mass loss rate and the loss rates of mechanical strengths, is effectively improved by CO(2) curing, while the thermal conductivity of cement concrete is decreased by CO(2) curing. The corrosion resistance of inner reinforcement is improved by the application of CO(2) curing on sludge ceramsite. MDPI 2022-08-20 /pmc/articles/PMC9413820/ /pubmed/36013891 http://dx.doi.org/10.3390/ma15165758 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Xu, Feng
Chang, Rencai
Zhang, Dongling
Liang, Zhao
Wang, Kewei
Wang, Hui
Improvement of CO(2)-Cured Sludge Ceramsite on the Mechanical Performances and Corrosion Resistance of Cement Concrete
title Improvement of CO(2)-Cured Sludge Ceramsite on the Mechanical Performances and Corrosion Resistance of Cement Concrete
title_full Improvement of CO(2)-Cured Sludge Ceramsite on the Mechanical Performances and Corrosion Resistance of Cement Concrete
title_fullStr Improvement of CO(2)-Cured Sludge Ceramsite on the Mechanical Performances and Corrosion Resistance of Cement Concrete
title_full_unstemmed Improvement of CO(2)-Cured Sludge Ceramsite on the Mechanical Performances and Corrosion Resistance of Cement Concrete
title_short Improvement of CO(2)-Cured Sludge Ceramsite on the Mechanical Performances and Corrosion Resistance of Cement Concrete
title_sort improvement of co(2)-cured sludge ceramsite on the mechanical performances and corrosion resistance of cement concrete
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9413820/
https://www.ncbi.nlm.nih.gov/pubmed/36013891
http://dx.doi.org/10.3390/ma15165758
work_keys_str_mv AT xufeng improvementofco2curedsludgeceramsiteonthemechanicalperformancesandcorrosionresistanceofcementconcrete
AT changrencai improvementofco2curedsludgeceramsiteonthemechanicalperformancesandcorrosionresistanceofcementconcrete
AT zhangdongling improvementofco2curedsludgeceramsiteonthemechanicalperformancesandcorrosionresistanceofcementconcrete
AT liangzhao improvementofco2curedsludgeceramsiteonthemechanicalperformancesandcorrosionresistanceofcementconcrete
AT wangkewei improvementofco2curedsludgeceramsiteonthemechanicalperformancesandcorrosionresistanceofcementconcrete
AT wanghui improvementofco2curedsludgeceramsiteonthemechanicalperformancesandcorrosionresistanceofcementconcrete