5 Things to Consider When Constructing Pavements

When constructing pavements and roads, there are many things to consider. Since it’s going to bear the traffic load, it should be strong enough to withstand the heavy weight and changing temperature. When constructing a pavement, the thickness of the pavement matters a lot.  

Constructing Pavements 

When companies like Delray Beach pavers that specializes in pavement constructing, they put into mid the traffic, environment, material and base characteristics. The following are the other considerations.  

Environmental Factors 

When constructing a pavement, the soil condition should be considered. Temperature and moisture are the top culprits why the pavement is damaged even before its expected lifespan. Once the moisture of the soil increases, its load bearing capacity decreases. This will lead to soil swelling and heaving. The pavement can sink or heave, just like a damaged house foundation.  

When the moisture in the pavement is stressed out too much because of the freezing temperature, it might cause the pavement to heave. The effects of the mentioned environmental factors can be eliminated or removed by removing the moisture and keeping it away from the base by using moisture resistant materials.  

Traffic 

Too much traffic will subject any kind of pavement to wear and damage. The amount of damage that the pavement will get depends on the number of vehicles and their weight that pass through the pavement over a given period of time. The engineers of road construction have estimated that the life expectancy of a pavement is 20 years.  

The general principle when it comes to road/pavement construction is that the heavier the vehicles and the more number they are, the thicker the pavement should be to be able to support all of them for many decades. The Asphalt Institute actually made a list of traffic class and their corresponding road type. Each road type has ideal pavement thickness, which also depend on the materials used.  

Subgrade Strength 

This factor has the greatest effect when it comes to determining the perfect thickness of the pavement. The principle is this; a weak subgrade will require a thick pavement so sufficiently bear the load of the traffic weight. The subgrade’s permeability and bearing capacity influences the total thickness of the pavement. In a pavement, there are three separate layers below the surface. These are the subgrade, sub base and the base.  

The subgrade could be undisturbed earth, natural or compacted till. The sub base consists of crushed stone or gravel (both clean course aggregate). If the heavy-duty surface requires additional layer of material, a sub base is installed.  

Pavement Width 

The width of the pavement will also depend on its purpose and the number of vehicles that will use it. Wide highways need to obviously wider than the community roads. A parking lot needs to be wider than those of the convenience store. The standard of the pavement width can be found in the zoning regulations. There would be minimum width requirements for driveways, roads, parking stalls, sidewalks, loading areas and others.

Read More