Why can't SMA use tire rollers?

[McErin]

Asphalt will stick to the tires and fail to meet paving requirements. Here are the relevant details: Introduction: The road surface requires smoothness and uniformity. Modified asphalt is hot and sticky during paving. When a tire roller passes over it, a significant amount of asphalt will adhere to the tires, which is troublesome and difficult to remove. Additionally, the tread patterns on the tires can leave grooves on the road surface, thus failing to meet the smoothness and uniformity requirements. Additional Information: For dense-graded asphalt mixtures with smaller and continuously graded aggregates, the kneading action of tire rollers helps compact the layer without breaking the particles, ensuring uniform density. However, for modified asphalt mixtures, which typically have gap-graded aggregates, the kneading action of tire rollers can cause coarse aggregates to float up, reducing surface texture depth and even leading to bleeding. Therefore, vibratory rollers are generally preferred.