Why has the rotary compactor become a commonly used tool in the preparation of asphalt mixtures?

　　The mechanical and service performance of asphalt mixtures directly affects the functionality and characteristics of asphalt pavements. Instruments used to provide samples for asphalt mixture testing, predict long-term pavement performance, and control or inspect mixture quality by measuring rotational shear are essential tools in this process. The rotary compactor simulates the in-service rolling action of vehicular traffic on pavements, subjecting freshly prepared asphalt mixtures to rotational compaction—a method that outperforms the conventional Marshall compaction test. Consequently, as the core equipment employed in this method, the rotary compactor has been attracting increasing attention. This device utilizes circular oscillation; by employing the rotary compaction technique, it prepares asphalt mixture specimens that closely mimic the kneading and compaction effects of actual road traffic loads. Under hydraulic static loading, it achieves a uniformly compacted pattern with ease of operation. So, let’s explore together why the rotary compactor has become such a commonly used tool in asphalt mixture preparation!

　　1. Can accurately simulate the actual conditions of a road roller;

　　2. Work on implementation has significantly improved.

　　3. The aggregates are resistant to breakage and damage during compaction, maintaining their original gradation and exhibiting excellent compatibility with each other.

　　Under a constant compaction pressure of 600 kPa, the specimens compacted using the rotary compactor closely resemble actual pavement conditions in terms of density, aggregate arrangement, and structural characteristics. The degree of compaction can reach over 98% of the theoretical density. During compaction, the process can be controlled by adjusting parameters such as the number of compaction passes and specimen height. After each compaction pass, the specimen height can be measured to evaluate the volumetric properties of the asphalt mixture. The compaction angle is set at 1.25 degrees, and the device rotates at a speed of 30 rpm, simulating the on-site rolling conditions of a road roller. Due to its excellent simulation capability and ease of data collection, the rotary compactor has become an ideal compaction tool for asphalt mixtures.

　　Structural features of the rotary compactor:

　　This machine meets or exceeds all SUPERPAVE standards set by the U.S. Federal Highway Administration (FHWA). The system features comprehensive protection functions and is capable of operating under complex working conditions. Under specified compaction pressure and rotation compaction angle, it ensures safe and reliable operation. The control system is centered around a PLC from Siemens Germany.

　　This device features an 8-inch industrial touchscreen as the human-machine interaction platform, displaying data such as rotational speed, real-time pressure, displacement data, and density variation curves. It provides a computer interface that allows users to download system test data from the computer and save it in Excel format as spreadsheets or trend charts. The interface is clear and highly visible, with a Chinese-language menu for easy operation. It enables simple setting of operational parameters and real-time display of process data. Additionally, the rotary compactor is designed and manufactured based on imported equipment; its key components—including the pressure unit, sensors, and variable-frequency motor—are all original imports.

　　The above introduction explains why the rotary compactor has become a commonly used tool in the preparation of asphalt mixtures. If you’d like to learn more, feel free to contact us anytime!