Experimental Study on the Thermal Healing Effect on Stress-Damaged Granite

Permeability Characteristics and Mechanism of Silicone-Hydrophobic-Powder-Modified Compacted Loess

“…According to the relaxation mechanism of low-field nuclear magnetic resonance, the relationship between the relaxation time of loess pore fluid and the pore structure [36] can be expressed as follows:…”

“…According to the principle of low-field nuclear magnetic resonance, the change in the loess pore volume can be reflected by the change in the T 2 spectrum. Considering the structural characteristics of the sample and shape characteristics of the pore distribution, the relaxation strength in Equation (1) was set as 3.0 µm/ms, (S/V) pore = r/3 [36]. The correlation between the relaxation time and porosity of the sample, Equation (2), was obtained by simplifying Equation (1).…”

“…The correlation between the relaxation time and porosity of the sample, Equation (2), was obtained by simplifying Equation (1). According to the existing classification criteria and methods of loess pore size analysis [36], the pore size of the sample was divided into four categories: small pores [0, 1), medium pores [1,20], large pores (20,1000], and ultra-large pores (1000, 6000] (unit: µm). The relaxation time distribution of the T 2 spectrum was transformed into the pore size distribution of the sample [37].…”