Tiepinnoitushoito

Tiepinnoitushoito, also known as tiepinnoitus or road surfacing, is the process of applying a layer of asphalt or other paving material to the surface of a road. This treatment is essential for maintaining road infrastructure, providing a smooth and durable driving surface, and protecting the underlying road base from wear and tear. The most common material used is asphalt concrete, a mixture of aggregates, bitumen (asphalt binder), and fillers.

The process typically begins with preparing the existing road surface. This may involve cleaning, milling off old layers, or repairing potholes and cracks. Once the surface is prepared, a tack coat, a thin layer of emulsified asphalt, is applied to ensure good adhesion between the old surface and the new layer. The asphalt mixture is then transported to the site in heated trucks and spread evenly using a paving machine. Rollers, both vibratory and static, are used immediately after paving to compact the asphalt, achieving the required density and smoothness.

Tiepinnoitushoito serves several purposes. It enhances the safety of the road by providing better traction and reducing the risk of hydroplaning. It also improves driving comfort by smoothing out uneven surfaces. Furthermore, it extends the lifespan of the road by protecting it from water infiltration, frost damage, and traffic loads. Different types of tiepinnoitushoito exist, including thin overlays for maintenance and thicker layers for structural improvements. The selection of materials and methods depends on factors such as traffic volume, climate conditions, and the existing road structure. Regular maintenance through tiepinnoitushoito is a cost-effective way to preserve road networks.