# Effects of Time Content on Road Performance of Low Liquid Limit Clay
## 1 Introduction  
The Yellow and Yangtze River basins in China include a considerable number of low liquid limit clays. The use of low liquid limit clay as roadbed filler in the construction of expressways in this area is unavoidable. However, because of the low liquid limit, poor plasticity index, low strength, and water sensitivity, the mechanical properties of low liquid limit clay deteriorate with water changes [1, 2], making it difficult to compact in roadbed construction. Because of its water sensitivity, water migration is common as the environment changes, affecting road performance [3]. The elastic modulus is significantly influenced by the stress state and water content of compacted clay. This directly affects road service [4]. In addition, it is simple to create roadbed collapse and pavement cracking if it is employed during the active period of a highway, which will directly impact the safety of traffic operation. To meet the performance requirements for the road, it is crucial to improve the low liquid limit clay. Presently, bad soil is typically improved using physical (soil compaction, etc.) and chemical approaches. The three primary additions utilized in chemical stability are lime, cement, and fly ash [5, 6, 7, 8, 9]. Due to its low cost, positive effects, and practical construction, lime has drawn the interest of several researchers and produced many research-related findings. In Yan'an City, [PERSON] et al. 's [10] research looked at the impact of dry density and lime content on the hydraulic conductivity and microstructure of loess. Due to the negative logarithmic correlation between hydraulic conductivity and dry density, adding lime will make loess less hydraulically conductive at the same dry density. However, lime addition causes a decrease in dry density at a specific level of compaction because of increasedflocculation and aggregation. [PERSON] et al. 's study of the main geotechnical properties of untreated and lime-treated compacted FoCa clay samples used X-ray diffraction, thermogravimetric analysis, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) [11]. The findings demonstrate that lime-treated clay has additional layers of accumulation, altered clay particles, and a higher calcium content at the particle border. By conducting studies on lime-stabilized loess with various moisture levels and temperatures, [PERSON] [12] looked at the features of lime stability and internal mineral changes at high temperatures. The pozzolanic reaction, crystallization reaction, and lime ripening reaction all contribute to the strength improvement of lime-stabilized loess. The response rate of these processes can be accelerated by high temperatures. [PERSON] and [PERSON] [13] claim that the lime stabilization process consists mostly of two steps. It may take several hours or days to finish the first stage of alteration. According to the soil's mineralogical makeup, cation exchange, flocculation, carbonization, and various short-term pozzolanic reactions take place at this stage. The pozzolanic process can also increase strength and durability, which is the second stage. In order to assess the effects of compaction delay and ambient temperature on the physical, mechanical, and hydraulic properties of lime-treated expansive clay, [PERSON] [14] conducted a number of tests. [PERSON] et al. 's [15] research examined the effects of a 10% lime treatment on several clay minerals. The consumption of lime on the curing time was assessed using an atomic absorption device, revealing the mechanism underlying the mineral reaction and the short- and long-term curing of lime soil subgrade. [PERSON] [16] conducted studies to lower the clay and silt content in CSEB manufacturing and discovered the stability of lime and lime-cement combinations as stabilizers. According to the test results, lime-stabilized blocks can be utilized for single-layer construction, and lime combined with cement stabilizer results in blocks with greater compressive strength than lime alone.