Study on the modification effect and mechanism of composite solid waste and steel fiber on the mechanical properties of concrete

Frontiers in Materials, Год журнала: 2024, Номер 11

Опубликована: Авг. 9, 2024

To promote the use of solid waste in concrete production and solve problem secondary pollution caused by a large amount waste, four-factor four-level orthogonal test method was used to investigate different replacement rates coal gangue (CG) ceramics (15%, 20%, 25%, 30%), ceramic sand (CGS) (10%, 15%, 25%), fly ash (FA) steel fiber (SF) content (0.30%, 0.60%, 0.90%, 1.2). By using range analysis, variance matrix regression prediction models primary factors, optimal dosage, strength under factor levels were obtained. The microstructure strengthening mechanisms materials analyzed scanning electron microscopy (SEM). results show that combination CG substitution rate is 30%, CGS SF 1.2%, FA 10% for cube compressive strength. For splitting tensile strength, 10%. resulting model has high accuracy, which can predict within selected this paper provide reference application fibers concrete, contributes energy conservation emission reduction construction industry.

Язык: Английский

---

Low- and zero-cement frozen backfill within permafrost mining conditions: A review

Journal of Environmental Management, Год журнала: 2024, Номер 371, С. 123335 - 123335

Опубликована: Ноя. 15, 2024

Язык: Английский

---

Mechanical Behavior and Design of Frozen Zero-Cement Backfill: Insights from Ucs Testing and Modeling in Freezing Temperatures

Опубликована: Янв. 1, 2024

Язык: Английский

---

Mechanochemical processing of landfilled coal fly ash for enhanced CO₂ sequestration and heavy metal immobilization in sustainable hydraulic cements

International Journal of Coal Preparation and Utilization, Год журнала: 2024, Номер unknown, С. 1 - 26

Опубликована: Сен. 12, 2024

Язык: Английский

---

Experimental Investigation on Mechanical Behaviors and Damage Evolution of Soft Rock Analog Containing Internal Fracture Network

Rock Mechanics and Rock Engineering, Год журнала: 2024, Номер unknown

Опубликована: Сен. 27, 2024

Язык: Английский

---

Study on the Compressive and Tensile Properties of Latex-Modified Cement Stone

Materials, Год журнала: 2024, Номер 17(19), С. 4868 - 4868

Опубликована: Окт. 3, 2024

The integrity of wellbores is essential for the safe and efficient operation drilling activities. Cement plays a critical role in this process, serving as primary barrier that isolates casing from surrounding formation. To ensure proper application cement wells, thorough understanding its mechanical properties essential. Latex-modified stone (LMCS) offers significant advantages due to anti-channeling, anti-corrosion, characteristics. This study examined LMCS through uniaxial triaxial compression Brazilian splitting tests. Under compression, elastic modulus, Poisson’s ratio, compressive strength were found range 4.08 8.29 GPa, 0.05 0.46, 15.82 22.21 MPa, respectively. In tests with confining pressures 2 4 6 8 10 modulus ranged 4.48 6.87 ratio 0.16, 27.38 39.58 MPa. tensile 2.34 3.72 Moreover, increased pressure, showing enhanced resistance failure effect. However, rate increase gradually diminished. Strength criteria LMCS, including Mohr–Coulomb Drucker–Prager parameters, derived These parameters provide useful reference developing constitutive model simulating conditions. findings research offer valuable insights can guide construction oil gas wells.

Язык: Английский

---

Meso-mechanical Damage and Energy Dissipation Mechanism in Backfill: Effects of Seepage and Crack Defects

Geotechnical and Geological Engineering, Год журнала: 2024, Номер 43(1)

Опубликована: Дек. 2, 2024

Язык: Английский

---