Cargando…

Mechanical Properties and Uniaxial Failure Behavior of Concrete with Different Solid Waste Coarse Aggregates

To reveal the differences between the mechanical properties of solid waste coarse aggregate concrete and natural coarse aggregate concrete (NCAC) under equal strength, the basic mechanical properties of coarse aggregate concrete with seven different solid wastes (i.e., self-combusted coal gangue, un...

Descripción completa

Detalles Bibliográficos
Autores principales: Zhou, Mei, Bai, Jinting, Li, Shaowei, Zhang, Kai, Li, Chao, Wang, Xinyi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9504492/
https://www.ncbi.nlm.nih.gov/pubmed/36143570
http://dx.doi.org/10.3390/ma15186259
_version_ 1784796230499434496
author Zhou, Mei
Bai, Jinting
Li, Shaowei
Zhang, Kai
Li, Chao
Wang, Xinyi
author_facet Zhou, Mei
Bai, Jinting
Li, Shaowei
Zhang, Kai
Li, Chao
Wang, Xinyi
author_sort Zhou, Mei
collection PubMed
description To reveal the differences between the mechanical properties of solid waste coarse aggregate concrete and natural coarse aggregate concrete (NCAC) under equal strength, the basic mechanical properties of coarse aggregate concrete with seven different solid wastes (i.e., self-combusted coal gangue, uncombusted coal gangue, marble sheet waste, granite sheet waste, iron waste rock, recycled concrete, and self-combusted coal gangue ceramicite) were tested, and the trends in failure morphology, elastic modulus, and the stress–strain full curves of the different solid waste coarse aggregate concretes were analyzed and compared with NCAC. Finally, the interfacial structure of the concrete was characterized by SEM. The results showed that C30 strength grade concrete was prepared with different solid waste coarse aggregates; however, the 28 d compressive strength, split tensile strength, axial compression strength, flexural strength, and elastic modulus of the concrete was 35.26–47.35, 2.13–3.35, 26.43–42.70, 2.83–3.94, and 17.3–31.2, respectively. The modulus of elasticity of the solid waste coarse aggregate concrete was smaller than the NCAC under equal strength, with a maximum difference of 45%. The peak compressive strain and ultimate compressive strain were larger than the NCAC, with a maximum difference of 43%. The crushing value of the solid waste coarse aggregate affected the splitting tensile strength, flexural strength, and modulus of elasticity of the concrete to a greater extent than the compressive strength. The transition zone at the concrete interface of the coarse aggregates with different solid wastes varied widely. The porous micro-pumping effect of the self-combusted gangue and self-combusted gangue vitrified reinforced the concrete interface transition zone, and the polished surface of sheet waste, uncombusted gangue, and recycled concrete aggregate surface adhesion weakened the interface transition zone; Finally, the uniaxial compressive stress–strain curve model for concrete with different solid waste coarse aggregates was established based on the Guo Zhenhai model.
format Online
Article
Text
id pubmed-9504492
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-95044922022-09-24 Mechanical Properties and Uniaxial Failure Behavior of Concrete with Different Solid Waste Coarse Aggregates Zhou, Mei Bai, Jinting Li, Shaowei Zhang, Kai Li, Chao Wang, Xinyi Materials (Basel) Article To reveal the differences between the mechanical properties of solid waste coarse aggregate concrete and natural coarse aggregate concrete (NCAC) under equal strength, the basic mechanical properties of coarse aggregate concrete with seven different solid wastes (i.e., self-combusted coal gangue, uncombusted coal gangue, marble sheet waste, granite sheet waste, iron waste rock, recycled concrete, and self-combusted coal gangue ceramicite) were tested, and the trends in failure morphology, elastic modulus, and the stress–strain full curves of the different solid waste coarse aggregate concretes were analyzed and compared with NCAC. Finally, the interfacial structure of the concrete was characterized by SEM. The results showed that C30 strength grade concrete was prepared with different solid waste coarse aggregates; however, the 28 d compressive strength, split tensile strength, axial compression strength, flexural strength, and elastic modulus of the concrete was 35.26–47.35, 2.13–3.35, 26.43–42.70, 2.83–3.94, and 17.3–31.2, respectively. The modulus of elasticity of the solid waste coarse aggregate concrete was smaller than the NCAC under equal strength, with a maximum difference of 45%. The peak compressive strain and ultimate compressive strain were larger than the NCAC, with a maximum difference of 43%. The crushing value of the solid waste coarse aggregate affected the splitting tensile strength, flexural strength, and modulus of elasticity of the concrete to a greater extent than the compressive strength. The transition zone at the concrete interface of the coarse aggregates with different solid wastes varied widely. The porous micro-pumping effect of the self-combusted gangue and self-combusted gangue vitrified reinforced the concrete interface transition zone, and the polished surface of sheet waste, uncombusted gangue, and recycled concrete aggregate surface adhesion weakened the interface transition zone; Finally, the uniaxial compressive stress–strain curve model for concrete with different solid waste coarse aggregates was established based on the Guo Zhenhai model. MDPI 2022-09-08 /pmc/articles/PMC9504492/ /pubmed/36143570 http://dx.doi.org/10.3390/ma15186259 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
Zhou, Mei
Bai, Jinting
Li, Shaowei
Zhang, Kai
Li, Chao
Wang, Xinyi
Mechanical Properties and Uniaxial Failure Behavior of Concrete with Different Solid Waste Coarse Aggregates
title Mechanical Properties and Uniaxial Failure Behavior of Concrete with Different Solid Waste Coarse Aggregates
title_full Mechanical Properties and Uniaxial Failure Behavior of Concrete with Different Solid Waste Coarse Aggregates
title_fullStr Mechanical Properties and Uniaxial Failure Behavior of Concrete with Different Solid Waste Coarse Aggregates
title_full_unstemmed Mechanical Properties and Uniaxial Failure Behavior of Concrete with Different Solid Waste Coarse Aggregates
title_short Mechanical Properties and Uniaxial Failure Behavior of Concrete with Different Solid Waste Coarse Aggregates
title_sort mechanical properties and uniaxial failure behavior of concrete with different solid waste coarse aggregates
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9504492/
https://www.ncbi.nlm.nih.gov/pubmed/36143570
http://dx.doi.org/10.3390/ma15186259
work_keys_str_mv AT zhoumei mechanicalpropertiesanduniaxialfailurebehaviorofconcretewithdifferentsolidwastecoarseaggregates
AT baijinting mechanicalpropertiesanduniaxialfailurebehaviorofconcretewithdifferentsolidwastecoarseaggregates
AT lishaowei mechanicalpropertiesanduniaxialfailurebehaviorofconcretewithdifferentsolidwastecoarseaggregates
AT zhangkai mechanicalpropertiesanduniaxialfailurebehaviorofconcretewithdifferentsolidwastecoarseaggregates
AT lichao mechanicalpropertiesanduniaxialfailurebehaviorofconcretewithdifferentsolidwastecoarseaggregates
AT wangxinyi mechanicalpropertiesanduniaxialfailurebehaviorofconcretewithdifferentsolidwastecoarseaggregates