Some key facts about road rollers—told to you by a road roller manufacturer in Luoyang.

【文章概要】According to a roller manufacturer in Luoyang, the vibration frequency of a road roller refers to the number of vibrations it completes per unit of time. Vibration frequency directly affects the compaction degree of the subgrade and is a key factor influencing the particle‑level movement of the compacted material. Generally, within a given frequency range, higher vibration frequencies yield better pavement compaction performance.

Luoyang road roller Manufacturers define the vibration frequency of a roller as the number of vibrations it completes per unit time. Vibration frequency directly affects the compaction degree of the subgrade and is a key factor influencing the particle‑movement dynamics of the compacted material. Generally, within a given frequency range, higher vibration frequencies yield better pavement compaction.

According to a roller compactor manufacturer in Luoyang, when elementary particles resonate, the friction between materials decreases and their flowability improves. At the same time, the sharp edges of the particles are fractured by high-frequency impacts, reducing the voids. Under the action of a vibratory roller, the particles re‑align; in particular, fine particles quickly intermix with larger ones, squeezing out air and water from the gaps.

According to a roller manufacturer in Luoyang, in practice, soil exhibits varying gradations, structures, and physical properties, making it difficult to establish precise values for vibration‑frequency parameters. Even when such values are determined, they apply only to specific soil types, thereby limiting the scope of application for vibratory rollers. Moreover, as soil compaction increases within the same construction area, its mechanical parameters—such as stiffness—tend to rise, damping decreases, and the natural vibration frequency tends to increase.

According to the Luoyang roller manufacturer, to fully harness the vibratory energy of a vibratory roller and enhance operational efficiency, the vibration frequency should be slightly higher than the soil’s natural frequency. Consequently, depending on the specific application and requirements, it is necessary to select vibratory rollers of various models and types, with different operating weights and compaction configurations.

According to a roller manufacturer in Luoyang, the subgrade serves as the supporting structure for the pavement and consists of multiple layers with varying material compositions, ranging from coarse stone to clay containing fine particles. After compaction, it exhibits significant settlement, resulting in relatively lower requirements for pavement smoothness. Practical experience has demonstrated that using heavy‑type vibratory rollers to compact rockfill is an effective approach, with an optimal vibration frequency of 25–30 Hz.

The compaction requirements for the subbase and granular base courses are higher than those for the subgrade, with materials consisting primarily of sand, crushed stone, and fine soil particles. Consequently, single-drum vibratory rollers with slightly greater tonnage or double-drum vibratory rollers weighing 10 tons or more are often employed for compaction. Tests have shown that optimal compaction results can be achieved when the vibration frequency is within the range of 25–40 Hz.

According to the Luoyang roller manufacturer, when a vibratory roller operates at high vibration frequencies, the amplitude decreases, making it difficult to generate sufficient excitation force. Consequently, the compaction depth is shallower, and more passes are required to achieve the desired density. Conversely, at lower vibration frequencies, the amplitude increases and the compaction depth deepens; however, surface smoothness deteriorates, compaction speed declines, and overall compaction efficiency suffers.

According to manufacturers of road rollers in Luoyang, when a vibratory roller re‑compacts asphalt aggregates, the compaction performance is optimal at vibration frequencies between 60 and 80 Hz. However, increasing the vibration frequency raises both manufacturing and construction costs; consequently, large two‑drum vibratory rollers typically operate at frequencies of only 40–55 Hz, while high‑frequency models can achieve frequencies exceeding 60 Hz.