A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Damage characterization and microscopic mechanism of steel slag-cemented paste backfill under uniaxial compression
https://orcid.org/0000-0002-8524-1000
Abstract The utilization of steel slag-cemented iron tailings for preparing mine backfill materials can effectively consume industrial solid waste generated from steel production and significantly reduce backfilling costs. The study analyzed the influence and mechanisms of steel slag (SS) content on the mechanical damage characterization of steel slag-cemented paste backfill (SS-CPB) through uniaxial compressive strength (UCS) tests and microscopic testing methods such as X-ray diffraction (XRD) and a scanning electron microscope (SEM). The engineering applicability and economic feasibility of the material were evaluated. The main conclusions were as follows: (1) With the increase of SS content, the strength of SS-CPB first increases and then decreases, with the highest strength observed at a 10% SS content. (2) The inclusion of SS in SS-CPB leads to higher peak strain and post-peak strength, demonstrating significant plastic deformation characteristics. (3) When the SS content increases from 30% to 60%, the Ca(OH)2 content in SS-CPB hydration products decreases by 20.2%, and internal micropores increase. (4) When the SS content reaches 30%, the damage mode of SS-CPB changes from purely splitting failure to a plastic combination of splitting and shear failure. These research findings provide a new application model for the collaborative utilization of steel slag, tailings, and other solid wastes.
Highlights The addition of a large amount of SS significantly reduces the strength of SS-CPB. SS-CPB exhibits characteristics of high plasticity and high ductility. SS leads to a compound damage mode of splitting and shearing of SS-CPB. The addition of SS decreases the degree of hydration reaction in SS-CPB.
Damage characterization and microscopic mechanism of steel slag-cemented paste backfill under uniaxial compression
https://orcid.org/0000-0002-8524-1000
Abstract The utilization of steel slag-cemented iron tailings for preparing mine backfill materials can effectively consume industrial solid waste generated from steel production and significantly reduce backfilling costs. The study analyzed the influence and mechanisms of steel slag (SS) content on the mechanical damage characterization of steel slag-cemented paste backfill (SS-CPB) through uniaxial compressive strength (UCS) tests and microscopic testing methods such as X-ray diffraction (XRD) and a scanning electron microscope (SEM). The engineering applicability and economic feasibility of the material were evaluated. The main conclusions were as follows: (1) With the increase of SS content, the strength of SS-CPB first increases and then decreases, with the highest strength observed at a 10% SS content. (2) The inclusion of SS in SS-CPB leads to higher peak strain and post-peak strength, demonstrating significant plastic deformation characteristics. (3) When the SS content increases from 30% to 60%, the Ca(OH)2 content in SS-CPB hydration products decreases by 20.2%, and internal micropores increase. (4) When the SS content reaches 30%, the damage mode of SS-CPB changes from purely splitting failure to a plastic combination of splitting and shear failure. These research findings provide a new application model for the collaborative utilization of steel slag, tailings, and other solid wastes.
Highlights The addition of a large amount of SS significantly reduces the strength of SS-CPB. SS-CPB exhibits characteristics of high plasticity and high ductility. SS leads to a compound damage mode of splitting and shearing of SS-CPB. The addition of SS decreases the degree of hydration reaction in SS-CPB.
Damage characterization and microscopic mechanism of steel slag-cemented paste backfill under uniaxial compression
https://orcid.org/0000-0002-8524-1000
Abstract The utilization of steel slag-cemented iron tailings for preparing mine backfill materials can effectively consume industrial solid waste generated from steel production and significantly reduce backfilling costs. The study analyzed the influence and mechanisms of steel slag (SS) content on the mechanical damage characterization of steel slag-cemented paste backfill (SS-CPB) through uniaxial compressive strength (UCS) tests and microscopic testing methods such as X-ray diffraction (XRD) and a scanning electron microscope (SEM). The engineering applicability and economic feasibility of the material were evaluated. The main conclusions were as follows: (1) With the increase of SS content, the strength of SS-CPB first increases and then decreases, with the highest strength observed at a 10% SS content. (2) The inclusion of SS in SS-CPB leads to higher peak strain and post-peak strength, demonstrating significant plastic deformation characteristics. (3) When the SS content increases from 30% to 60%, the Ca(OH)2 content in SS-CPB hydration products decreases by 20.2%, and internal micropores increase. (4) When the SS content reaches 30%, the damage mode of SS-CPB changes from purely splitting failure to a plastic combination of splitting and shear failure. These research findings provide a new application model for the collaborative utilization of steel slag, tailings, and other solid wastes.
Highlights The addition of a large amount of SS significantly reduces the strength of SS-CPB. SS-CPB exhibits characteristics of high plasticity and high ductility. SS leads to a compound damage mode of splitting and shearing of SS-CPB. The addition of SS decreases the degree of hydration reaction in SS-CPB.
Damage characterization and microscopic mechanism of steel slag-cemented paste backfill under uniaxial compression
Hao, Jianshuai (author) / Zhou, Zihan (author) / Chen, Zhonghui (author) / Zhou, Yu (author) / Wang, Jianming (author)
2023-11-11
Article (Journal)
Electronic Resource
English
Study on Damage Constitutive Model of Cemented Tailings Backfill under Uniaxial Compression
| British Library Conference Proceedings | 2013