Mixture-proportioning design of cement soil containing Pisha sandstone for mine filling
The Ordos area, known for its abundant coal reserves, faces significant environmental challenges annually due to coal mining. This mining activity not only leads to extensive mining subsidence and environmental pollution but also exacerbates soil erosion, exacerbated by the region's weakly ceme...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S221450952400055X |
| _version_ | 1797338361324634112 |
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| author | Yu Jing Xin Liu Zheng Qiao Zongxu Liu Yutong Pang Huiru Qi Junjie Wang |
| author_facet | Yu Jing Xin Liu Zheng Qiao Zongxu Liu Yutong Pang Huiru Qi Junjie Wang |
| author_sort | Yu Jing |
| collection | DOAJ |
| description | The Ordos area, known for its abundant coal reserves, faces significant environmental challenges annually due to coal mining. This mining activity not only leads to extensive mining subsidence and environmental pollution but also exacerbates soil erosion, exacerbated by the region's weakly cemented pisha sandstone. Addressing these issues, filling mining offers a viable solution by substituting underground mineral resources with filling materials, thereby mitigating environmental harm and facilitating sustainable resource utilization. In coal-rich cities such as Ordos, a pressing concern is developing effective methods to prepare mine-filling materials using locally abundant resources. This work delves into the effect of varying mix proportions on the strength of cement-solidified Pisha sandstone and its underlying microscopic mechanisms. Using the simplex centroid design method, we predicted the 28-d compressive strength of cement-solidified Pisha sandstone with a compound binder. Building on previous research, we formulated a strength formula for cement soil with a compound binder. By correlating the measured 28-d compressive strength with the known mix proportions of Pisha cement soil, we estimated the 28-d compressive strength of the mixture Our findings confirm that both the simplex centroid design method and strength formula can accurately predict the 28-d compressive strength of stabilized Pisha sandstone with the compound binder. Our experimental design, encompassing the simplex centroid design method, regression formula, and specific strength formula, was obtained from a limited set of tests. Incorporating the required compressive strength of cement soil into both the strength and regression formulas allows for more accurate proportion determined through mutual verification of these methods. We discovered that blending Pisha sandstone with cement significantly effects the mixed material’s strength, and that substituting cement with ground granulated blast-furnace slag (GGBS) can enhance economic efficiency. Microstructural analysis of cement soil revealed that the strength enhancement by cement and GGBS is due to their hydration products filling the pores in Pisha sandstone, creating a unique structure. The results of this study have far-reaching implications, particularly in promoting the use of modified Pisha sandstone as mine-filling material. This approach not only addresses the management of problematic regional soils but also contributes to the ecological restoration of mining areas. |
| first_indexed | 2024-03-08T09:30:04Z |
| format | Article |
| id | doaj.art-8384d82a79694dd5b51cad7e401b57c3 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-08T09:30:04Z |
| publishDate | 2024-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-8384d82a79694dd5b51cad7e401b57c32024-01-31T05:43:03ZengElsevierCase Studies in Construction Materials2214-50952024-07-0120e02904Mixture-proportioning design of cement soil containing Pisha sandstone for mine fillingYu Jing0Xin Liu1Zheng Qiao2Zongxu Liu3Yutong Pang4Huiru Qi5Junjie Wang6Department of Civil Engineering, Ordos Institute of Technology, Ordos 017000, ChinaDepartment of Civil Engineering, Ordos Institute of Technology, Ordos 017000, China; Corresponding author.Construction Administration, Ordos Airport Logistics Park, Ordos 017000, ChinaDepartment of Civil Engineering, Ordos Institute of Technology, Ordos 017000, ChinaDepartment of Civil Engineering, Ordos Institute of Technology, Ordos 017000, ChinaDepartment of Civil Engineering, Ordos Institute of Technology, Ordos 017000, ChinaDepartment of Civil Engineering, Ordos Institute of Technology, Ordos 017000, ChinaThe Ordos area, known for its abundant coal reserves, faces significant environmental challenges annually due to coal mining. This mining activity not only leads to extensive mining subsidence and environmental pollution but also exacerbates soil erosion, exacerbated by the region's weakly cemented pisha sandstone. Addressing these issues, filling mining offers a viable solution by substituting underground mineral resources with filling materials, thereby mitigating environmental harm and facilitating sustainable resource utilization. In coal-rich cities such as Ordos, a pressing concern is developing effective methods to prepare mine-filling materials using locally abundant resources. This work delves into the effect of varying mix proportions on the strength of cement-solidified Pisha sandstone and its underlying microscopic mechanisms. Using the simplex centroid design method, we predicted the 28-d compressive strength of cement-solidified Pisha sandstone with a compound binder. Building on previous research, we formulated a strength formula for cement soil with a compound binder. By correlating the measured 28-d compressive strength with the known mix proportions of Pisha cement soil, we estimated the 28-d compressive strength of the mixture Our findings confirm that both the simplex centroid design method and strength formula can accurately predict the 28-d compressive strength of stabilized Pisha sandstone with the compound binder. Our experimental design, encompassing the simplex centroid design method, regression formula, and specific strength formula, was obtained from a limited set of tests. Incorporating the required compressive strength of cement soil into both the strength and regression formulas allows for more accurate proportion determined through mutual verification of these methods. We discovered that blending Pisha sandstone with cement significantly effects the mixed material’s strength, and that substituting cement with ground granulated blast-furnace slag (GGBS) can enhance economic efficiency. Microstructural analysis of cement soil revealed that the strength enhancement by cement and GGBS is due to their hydration products filling the pores in Pisha sandstone, creating a unique structure. The results of this study have far-reaching implications, particularly in promoting the use of modified Pisha sandstone as mine-filling material. This approach not only addresses the management of problematic regional soils but also contributes to the ecological restoration of mining areas.http://www.sciencedirect.com/science/article/pii/S221450952400055XPisha sandstoneSimplex centroid designSoil stabilizationUCSMicrostructural analysis |
| spellingShingle | Yu Jing Xin Liu Zheng Qiao Zongxu Liu Yutong Pang Huiru Qi Junjie Wang Mixture-proportioning design of cement soil containing Pisha sandstone for mine filling Case Studies in Construction Materials Pisha sandstone Simplex centroid design Soil stabilization UCS Microstructural analysis |
| title | Mixture-proportioning design of cement soil containing Pisha sandstone for mine filling |
| title_full | Mixture-proportioning design of cement soil containing Pisha sandstone for mine filling |
| title_fullStr | Mixture-proportioning design of cement soil containing Pisha sandstone for mine filling |
| title_full_unstemmed | Mixture-proportioning design of cement soil containing Pisha sandstone for mine filling |
| title_short | Mixture-proportioning design of cement soil containing Pisha sandstone for mine filling |
| title_sort | mixture proportioning design of cement soil containing pisha sandstone for mine filling |
| topic | Pisha sandstone Simplex centroid design Soil stabilization UCS Microstructural analysis |
| url | http://www.sciencedirect.com/science/article/pii/S221450952400055X |
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