Analysis of advantages and disadvantages of asphalt pavement and cement pavement

The choice of road surface materials needs to consider issues such as traffic, weather, cost and noise. They usually make their choices before starting a new road or resurfacing project to determine the best option.

Asphalt pavement is a pavement structure in which a certain thickness of asphalt mixture is paved on a flexible base and a semi-rigid base. Compared with sand-gravel pavement, the strength and stability of this pavement are greatly improved. Compared with cement concrete pavement, the surface of asphalt pavement is smooth and without joints. The driving vibration is small, the noise is low, the open traffic is fast, the maintenance is simple, and it is suitable for road construction in stages.

The disadvantage of asphalt pavement is its high temperature sensitivity. The intensity decreases in summer, and if it is not well controlled, the road surface will become soft and oily or will be damaged by shear. Asphalt materials become brittle at low temperatures and may cause road cracks.

Cement concrete pavement refers to the pavement structure composed of cement concrete slab as the surface layer, and the base layer and cushion layer, also called rigid pavement. The cement concrete pavement has high strength, good stability and long service life, which is suitable for heavy traffic roads.

The disadvantage of cement pavement is that many joints need to be set up. These joints increase the complexity of construction and affect the comfort of driving. The joints are weak points of the pavement. They should be designed and constructed carefully. Otherwise, mud will easily appear. , Wrong station and other hazards.

In the past, because of the high construction cost of asphalt pavement (the asphalt material itself is more expensive), cement pavement is more acceptable than asphalt pavement. With the development of economy and the improvement of asphalt refining technology, asphalt pavement has no disadvantages in terms of cost, so now both new roads and old road reconstructions use asphalt pavement in large quantities.