Performance characteristics of the rotary compactor

　　Specimens molded using a rotary compactor can accurately simulate the stress conditions experienced by asphalt pavements. Therefore, the rotary compactor boasts a compact, robust, and durable design that is easy to move. It features built-in mold angle measurement capabilities, allowing for the precise control or evaluation of mixture quality through rotational shear testing. The extra-large-capacity molds can accommodate larger volumes of mixtures, ensuring that the physical and mechanical test data obtained from the specimens are highly objective and accurate. This enables reliable prediction of pavement’s long-term performance, facilitates easy compaction and demolding, stores critical data from up to 20 tests, offers multiple output options, and comes equipped with mixture-design software. Now, let’s take a closer look at the performance characteristics of the rotary compactor!

　　I. Technical Features of the Rotary Compaction Tester:

　　1. The rotary compaction apparatus uses high-hardness steel for its frame to ensure precise angle control.

　　2. Electronically controlled adjustment allows for the measurement and real-time display of key parameters during compaction, including the rotation angle of the test mold, compaction pressure, specimen density, and rotational speed.

　　3. The color-display touch control system can be directly connected to a computer for coordinated device control. Through an interface, the microcomputer displays various graphs and achieves interference-free connectivity with the touchscreen.

　　4. You can easily set test parameters such as the rotation compaction angle, compaction pressure, rotational speed, and other relevant settings, and perform operations like saving, plotting, and printing the results of compaction experiments.

　　II. Introduction to the Main Components of the Rotary Compactor:

　　1. The rotary compaction apparatus mainly consists of a reaction frame, a loading device, a rotating base, a computer control system, an internal corner measurement device, a prototype sample, a hammer head (upper pressure plate) and a base (lower pressure plate), a loading device, and pressure sensors, as well as a shear stress measurement system.

　　2. The reaction frame has sufficient rigidity to ensure the stability of the rotational pressure’s real-time angular displacement; it is equipped with a safety guard door and features a power control switch.

　　3. The loading device shall ensure stable vertical pressure during the rotary compaction process, with the vertical pressure reaching the set value of 18 kPa.

　　4. The compaction angle is adjustable, and its adjustment range should meet the requirements of the test. The compaction angle shall be calibrated before shipment. The rotating base consists of a rotating sleeve, an angle-adjusting fastening mechanism, a rotary transmission mechanism, and a prototype sample.

　　5. The computer control system shall feature automatic control of the rotary compaction tester’s operation, as well as functions for collecting and analyzing test data.

　　6. The internal corner measurement device should be equipped with a data acquisition system, temperature measurement function, and data display function, as well as a prototype, a hammer head (upper pressing plate), and a bed body (lower pressing plate).

　　The rotary compactor is a device used to produce asphalt mixture specimens that meet specified volumetric and mechanical performance criteria by means of compaction and kneading. The specimens produced using this method closely resemble the actual compaction process encountered in field construction, enabling more accurate predictions of the long-term performance of pavements. The rotary compactor is an instrument that controls or evaluates mixture quality by measuring rotational shear. It simulates the real-world compaction conditions encountered during actual paving operations and is used to test the compaction characteristics of asphalt mixtures. Under three primary technical conditions—specific vertical compaction pressure, a fixed compaction angle, and a prescribed compaction rotation speed—the specimen is rotated uniformly in a circular motion at an eccentric angle. In the laboratory, this procedure mimics the volumetric and engineering properties of actual pavement materials. Through the kneading process, the compaction angle specified in this standard refers to the effective internal angle measured during the rotary compactor test; under constant compaction pressure, the specimen undergoes uniform rotation without changes in eccentricity, except for the eccentric angle itself.