Publications by authors named "Diantao Zheng"
Article Synopsis
- Underground grouting is challenging to test due to its hidden nature, but a new pressure filtration test device and a PFC2D uniaxial compression model were developed to analyze the strength and crack evolution of grouting materials.
- Results show that increasing pressure filtration leads to more slurry dehydration, lower pore water pressure, and tighter particle compression, which all contribute to higher stone strength.
- The study identifies three stages of stress-strain behavior in the stone body and highlights the significant increase in crack numbers after reaching peak strength, providing insights for selecting materials and pressure in grouting engineering.
To achieve an adjustable setting time and significantly improved early strength of a new type of sulphoaluminate cement-based double-liquid grouting material (SACDL), the effects of calcium formate, sodium sulfate, lithium carbonate, and a composite early strength agent on the setting hardening and early hydration behavior of SACDL paste were studied by means of setting time, fluidity, compressive strength, and viscosity tests. The results showed that the adsorption and osmosis of calcium formate, the complex decomposition of sodium sulfate, the precipitation polarization of lithium carbonate and the synergistic action of the composite early strength agent could accelerate the early hydration rate of SACDL, shorten the coagulation time, and improve the early strength of SACDL. The composite effect of 0.
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