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Research on the Constitutive Model of Steel Slag-Mineral Powder Modified Loess-Red Bedded Mudstone
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Yunyan Yu1, Haolei Tian1, Chongliang Luo2, Xiaogang Ding1
Chinese Journal of Underground Space and Engineering | 2026, 22(2) : 481 - 494
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Chinese Journal of Underground Space and Engineering | 2026, 22(2): 481-494
Research on the Constitutive Model of Steel Slag-Mineral Powder Modified Loess-Red Bedded Mudstone
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Yunyan Yu1, Haolei Tian1, Chongliang Luo2, Xiaogang Ding1
Affiliations
  • 1.School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, P. R. China
  • 2.School of Civil Engineering, Tianshui Normal University, Tianshui, Gansu 741001, P. R. China
Published: 2026-04-20 doi: 10.20174/j.JUSE.2026.02.10
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Aiming at the geological characteristics of loess overlying red-bedded mudstone in the Gansu area, two kinds of industrial solid wastes, namely steel slag and mineral powder are adopted to carry out the research on the mechanical properties and the constitutive model of the modified loess-red bedded mudstone mixed fill by compacting and triaxial CU test. The results show that: (1) The maximum dry density of the mixed fill is the largest when the mass ratio of loess: red mudstone is 1 ∶ 3. (2) The shear strength of steel slag is maximum when the mass dosing of steel slag is 7.5%. The larger the mass dosing of mineral powder is, the larger the shear strength is. (3) It is verified that the strain hardening process of soil samples before and after steel slag improvement could be accurately fitted by the Duncan-Zhang model. (4) For the problem that the hyperbolic model promoted by Shen Zhujiang can not fit the strain hardening well, this paper proposes to use the staged fitting method with positive and negative solutions, and it is verified that this method can accurately fit the strain hardening process of the mineral powder amended soil.

loess-red mudstone  /  industrial solid waste  /  stress-strain curve  /  Duncan-Chang model  /  Shen Zhujiang promotion hyperbolic model
Yunyan Yu, Haolei Tian, Chongliang Luo, Xiaogang Ding. Research on the Constitutive Model of Steel Slag-Mineral Powder Modified Loess-Red Bedded Mudstone[J]. Chinese Journal of Underground Space and Engineering, 2026 , 22 (2) : 481 -494 . DOI: 10.20174/j.JUSE.2026.02.10
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Year 2026 volume 22 Issue 2
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Article Info
doi: 10.20174/j.JUSE.2026.02.10
  • Receive Date：2025-06-11
  • Online Date：2026-06-17
  • Published：2026-04-20
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  • Received：2025-06-11
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Affiliations
    1.School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, P. R. China
    2.School of Civil Engineering, Tianshui Normal University, Tianshui, Gansu 741001, P. R. China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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