# Study on the Influence of Moisture Content and Void Ratio on the Disintegration of Red Clay
## 3 Microstructure Analysis of Red Clay
### Nuclear Magnetic Resonance Test
The initial T\({}_{2}\) value of the secondary peak in the nuclear magnetic attenuation curve gradually increases from 8.0264 ms to 9.4379 ms as the moisture content increases. The large pore size gradually shifts to the right, and the area decreases from 112,113.92 to 70,347.09, followed by a small fluctuation. This accounts for more than 98% of the total pore volume, indicating that as the moisture content increases, the large pore size gradually increases and the pore volume gradually decreases. The total peak area decreases from 113,366.79 at \(\omega\) = 24% to 71,033.06 at \(\omega\) = 30%, and the total pore volume decreases significantly with increasing moisture content. When e = 1.1, the soil structure is mostly bimodal, and the starting T\({}_{2}\) value of the main peak of the T\({}_{2}\) spectrum decreases slowly from 0.0488 ms to 0.0326 ms and then drops sharply to 0.0064 ms as the moisture content increases. The small pore size gradually shifts to the left, the peak width decreases from 3.5212 ms to 3.0336 ms, the main peak area decreases from 1225.51 to 1178.21, and the volume of small pores decreases with the increase of moisture content. The starting T\({}_{2}\) value of the secondary peak of the nuclear magnetic attenuation curve gradually increases from 8.7036 ms to 9.4379 ms as the moisture content increases, and the large pore size gradually shifts to the right. The area decreases significantly from 158,449.4 to 108,691.54, accounting for more than 99% of the total pore volume. The total peak area gradually decreases from 159,674.91 to 109,869.75 as the moisture content increases. Compared with e = 1.0, the starting T\({}_{2}\) value of the soil with the same moisture content gradually increases, and the ending T\({}_{2}\) value remains basically unchanged. The small pore size increases within a small range, and the peak width slightly decreases. The increment of the secondary peak area is between 30,670.01 and 71,357.58, with a growth rate of 34.76% to 101.43%. When e = 1.1, the soil structure is mostly bimodal. As the moisture content increases, the starting T\({}_{2}\) value of the main peak of the T\({}_{2}\) spectrum decreases slowly from 0.0488 ms to 0.0326 ms and then drops sharply to 0.0064 ms. The small pore size gradually shifts to the left, and the peak width decreases from 3.5212 ms to 3.0336 ms. The main peak area decreases from 1225.51 to 1178.21, and the volume of small pores decreases with the increase of moisture content. The starting T\({}_{2}\) value of the secondary peak of the nuclear magnetic attenuation curve gradually increases from 8.7036 ms to 9.4379 ms as the moisture content increases, and the large pore size gradually shifts to the right. The area decreases significantly from 158,449.4 to 108,691.54, accounting for more than 99% of the total pore volume. The total area gradually decreases from 159,674.91 to 109,869.75 as the moisture content increases. When compared with e = 1.0, the starting T\({}_{2}\) value of the soil with the same moisture content gradually increases, and the ending T\({}_{2}\) value remains basically unchanged. The small pore size increases within a small range, and the peak width slightly decreases. The increment of the secondary peak area is between 30,670.01 and 71,357.58, with a growth rate of 34.76% to 101.43%. When e = 1.15, the soil structure is bimodal. The starting T\({}_{2}\) value of the main peak in the T\({}_{2}\) spectrum decreases from 0.045 ms to 0.0277 ms as the moisture content increases. The peak width gradually decreases from 3.245 ms to 2.7723 ms. The small pore aperture gradually shifts to the left. The area of the main peak decreases from 1182.83 to 1143.23, while the area of the small pore decreases slightly with the increase of moisture content. The starting T\({}_{2}\) value of the secondary peak increases gradually with the moisture content, and the peak area decreases from 157,098.56 at \(\omega\) = 24% to 153,941.85 at \(\omega\) = 28%, then rapidly increases to 179,888.55.