# Determining the Compaction Temperature of Warm-Mix Anti-Rutting Asphal Mixture
The current technical specifications for the construction of highway asphalt pavements in China (JTG F40-2004) [12] suggest that the construction temperature of modified asphalt mixtures should be determined based on engineering experience, by increasing the construction temperature of the base asphalt mixture by 10-20 \({}^{\circ}\)C, but this is not accurate and lacks theoretical basis. [PERSON] et al. [13] proposed the \"torque-temperature curve\" test to determine the mixing and compaction temperatures of modified asphalt mixtures, which were verified through Marshall compaction tests and road performance tests. The test results were reasonable and in line with engineering experience. [PERSON] [14] found that the compaction temperature of warm-mix BRA-modified asphalt mixtures determined by the \"Equal Void Ratio Method\" can obtain the same degree of compaction as that of hot-mix BRA mixtures and had good workability at lower temperatures. [PERSON] [15], drawing on the Superpave design method, used the \"equal voids method\" to determine the mixing and compaction temperatures of warm-mix rubber-modified asphalt mixtures, and the compaction temperature obtained was consistent with engineering practice. [PERSON] [16] recommended using the compaction method to determine the compaction characteristics of warm-mix asphalt mixtures through experimental research. Previous researchers have often used the equal voids method based on the saturated surface-dry method to measure the voids of asphalt mixtures, thereby calculating the mixing and compaction temperatures of modified asphalt mixtures. However, due to the influence of closed voids in asphalt-mixture specimens, the obtained voids have a certain error compared to the actual voids, thus affecting the final mixing and compaction temperature results. In recent years, with the widespread application of image processing technology in practical engineering research, the method of obtaining material microstructure data through precise processing, recognition, and statistical analysis of acquired images has been adopted by many road material researchers [17]. High-tech methods, such as computer tomography (CT), can well characterize and analyze the details of voids in asphalt mixtures, such as their size and distribution [18]. CT is a microstructure-testing method that provides detailed information about the internal voids of a specimen to determine and assess the size and number of voids [19]. By setting the software threshold, the asphalt, aggregate, and void parts can be separated and quantified [20]. [PERSON] et al. [21] obtained non-destructive images of asphalt-mixture specimens through X-ray imaging and then used digital image processing technology to extract parameters such as voids, average void size, and the number of voids. [PERSON] et al. [22] used CT technology to analyze the dispersion of recycled rubber asphalt mixtures. [PERSON] et al. [23] used CT technology to study the impact of different modifiers on base asphalt mixtures under freeze-thaw cycles and explained the development process of F-T damage from a microscopic perspective. [PERSON] et al. [24] used CT technology to study the impact of three different gradations on the voids of mortar. This study aims to improve the compaction characteristics of anti-rutting asphalt mixture by adding warm-mix agent and to explore the compaction characteristics and evaluation methods of warm-mix anti-rutting composite-modified asphalt mixture. The evaluation is based on the viscosity tests of warm-mix anti-rutting composite-modified asphalt and continuous temperature variation compaction tests of asphalt mixture. The research findings can provide a reference for the engineering application of anti-rutting asphalt pavements.