Feasibility and performance analysis of ordinary concrete prepared with autoclaved spherical porous aggregates from waste rock sawdust
The escalating accumulation of waste rock sawdust in the stone processing industry poses significant environmental challenges. This study investigates the recycling of this waste into spherical porous aggregates (SPA) using autoclaving for integration into ordinary concrete. Properties like moisture...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-07-01
|
| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509524000500 |
| _version_ | 1827216821684535296 |
|---|---|
| author | Qingfeng Guan Yongxiang Zhou Faguang Leng |
| author_facet | Qingfeng Guan Yongxiang Zhou Faguang Leng |
| author_sort | Qingfeng Guan |
| collection | DOAJ |
| description | The escalating accumulation of waste rock sawdust in the stone processing industry poses significant environmental challenges. This study investigates the recycling of this waste into spherical porous aggregates (SPA) using autoclaving for integration into ordinary concrete. Properties like moisture transportability and chloride ion permeability resistance were evaluated. Findings indicate an enhanced flowability in SPA-incorporated concrete, with a 28-day strength of 56 MPa and a density exceeding 2300 kg/m³ . However, elevated SPA content correlated with increased drying shrinkage, water penetration, and electrical flux. Microscopic analysis revealed a compromised pore structure due to higher coarse pore content in SPA. Effective improvement in concrete durability is achievable by limiting SPA content to 20 vol%, reducing the water-binder ratio, or employing stronger SPA. The study validates the potential for scalable waste rock sawdust disposal through its use in ordinary concrete. |
| first_indexed | 2024-03-08T11:26:02Z |
| format | Article |
| id | doaj.art-ab84d5ccfa084f148e4c65d77c833a3b |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2025-03-21T15:09:13Z |
| publishDate | 2024-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-ab84d5ccfa084f148e4c65d77c833a3b2024-06-20T06:50:06ZengElsevierCase Studies in Construction Materials2214-50952024-07-0120e02899Feasibility and performance analysis of ordinary concrete prepared with autoclaved spherical porous aggregates from waste rock sawdustQingfeng Guan0Yongxiang Zhou1Faguang Leng2School of Materials Science and Engineering, Southeast University, Nanjing 211102, China; Institute of Building Materials, China Academy of Building Research, Beijing 100013, ChinaFaculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124, China; Corresponding author.Institute of Building Materials, China Academy of Building Research, Beijing 100013, China; State Key Laboratory of Building Safety and Built Environment, Beijing 100013, ChinaThe escalating accumulation of waste rock sawdust in the stone processing industry poses significant environmental challenges. This study investigates the recycling of this waste into spherical porous aggregates (SPA) using autoclaving for integration into ordinary concrete. Properties like moisture transportability and chloride ion permeability resistance were evaluated. Findings indicate an enhanced flowability in SPA-incorporated concrete, with a 28-day strength of 56 MPa and a density exceeding 2300 kg/m³ . However, elevated SPA content correlated with increased drying shrinkage, water penetration, and electrical flux. Microscopic analysis revealed a compromised pore structure due to higher coarse pore content in SPA. Effective improvement in concrete durability is achievable by limiting SPA content to 20 vol%, reducing the water-binder ratio, or employing stronger SPA. The study validates the potential for scalable waste rock sawdust disposal through its use in ordinary concrete.http://www.sciencedirect.com/science/article/pii/S2214509524000500Functional aggregateAdvanced concreteWorkability, Compressive strengthDurabilityPore structureMicrostructure |
| spellingShingle | Qingfeng Guan Yongxiang Zhou Faguang Leng Feasibility and performance analysis of ordinary concrete prepared with autoclaved spherical porous aggregates from waste rock sawdust Case Studies in Construction Materials Functional aggregate Advanced concrete Workability, Compressive strength Durability Pore structure Microstructure |
| title | Feasibility and performance analysis of ordinary concrete prepared with autoclaved spherical porous aggregates from waste rock sawdust |
| title_full | Feasibility and performance analysis of ordinary concrete prepared with autoclaved spherical porous aggregates from waste rock sawdust |
| title_fullStr | Feasibility and performance analysis of ordinary concrete prepared with autoclaved spherical porous aggregates from waste rock sawdust |
| title_full_unstemmed | Feasibility and performance analysis of ordinary concrete prepared with autoclaved spherical porous aggregates from waste rock sawdust |
| title_short | Feasibility and performance analysis of ordinary concrete prepared with autoclaved spherical porous aggregates from waste rock sawdust |
| title_sort | feasibility and performance analysis of ordinary concrete prepared with autoclaved spherical porous aggregates from waste rock sawdust |
| topic | Functional aggregate Advanced concrete Workability, Compressive strength Durability Pore structure Microstructure |
| url | http://www.sciencedirect.com/science/article/pii/S2214509524000500 |
| work_keys_str_mv | AT qingfengguan feasibilityandperformanceanalysisofordinaryconcretepreparedwithautoclavedsphericalporousaggregatesfromwasterocksawdust AT yongxiangzhou feasibilityandperformanceanalysisofordinaryconcretepreparedwithautoclavedsphericalporousaggregatesfromwasterocksawdust AT faguangleng feasibilityandperformanceanalysisofordinaryconcretepreparedwithautoclavedsphericalporousaggregatesfromwasterocksawdust |