## 1 Introduction  
China's rapid economic development and industrialization have led to a short supply of quality land with better engineering properties; therefore, developing and utilizing soft soils and other poor foundation soils, such as peat soil foundations, has attracted attention. Peat soil (a collective term for peat and peat soil) is a particular soft soil with a low natural weight, large porosity ratio, high compressibility, low bearing capacity, significant water content, high organic matter content, and low permeability [1, 2]. The bad characteristics of peat soil introduce a complex problem during foundation reinforcement treatment. China has used cement to reinforce soft soils since the 1970s [3]. However, many engineering projects show that ordinary cement is used to reinforce peat soil with considerable organic matter content, and the strength of cement-solidified soil often fails to meet the design demands. Its mechanical properties are worse, making the reinforcement effect unsatisfactory. The fundamental reason is that the HA in peat soil engages in a sequence of physicochemical reactions with the hydration products in ordinary cement,which are partially consumed, thus weakening its cementation and filling effects. The microstructure of cement soil produces many defects, leading to ordinary cement's failure to better exert its curing effect [4; 5; 6; 7]. [PERSON] et al. [8] added HA to Nansha silt soil and cured it for different periods to study the effect of the organic matter mass fraction and curing age on the strength of organic silt soil. The results indicated that the presence of organic matter can hinder the hydration reaction in cement. The effect of organic matter content on the strength of cement soil was limited and the decrease in cement soil strength became inconspicuous when the organic matter content was more than 5%. [PERSON] et al. [9] immersed cement soil containing HA in an FA solution to study the effect of HA erosion on cement soil. The results indicated that an increased HA admixture reduced cement strength gradually, and the cement soil strength increased with the increase in immersion time. FA improved the initial cement soil's strength. A higher cement mixing ratio resulted in a more evident enhancement effect. [PERSON] et al. [10] investigated the mechanical characteristics and microstructure of red clay containing organic matter cured with cement using cohesion, angle of internal friction, strength, and microscopic tests. The results indicated that cement soil's internal friction angle and strength decreased gradually with increasing organic matter content. The strength gradually approached a fixed value as it decreased. The fixed value was called the limit value, and the increase in organic matter content had little effect on the strength of the specimen once the limit value was exceeded. The cohesive force increased with the increase in organic matter content, and the presence of organic matter affected the formation of cement hydration products. Numerous scholars have studied peat soil sites, but more effective and environmentally friendly reinforcement materials are also being sought. This study introduces updated research results in the field of high-performance concrete to solve the above problems. Due to its excellent properties, UFC reduces the disadvantageous impacts of HA on the hydration products and the impact of external corrosion medium on the internal pore structure of the specimen and improves its macromechanical properties. People are seeking composite materials that reduce cement consumption and improve the mechanical properties of the solidified body in the context of global energy saving and emission reduction; therefore, this study has a high theoretical value and practical guiding significance for practical engineering projects. The mechanical properties of cement-based materials are affected by many factors, including fineness, particle size, curing conditions, adhesive material type, and temperature [11; 12; 13].