Low Volume Roads comprise of more than 50% of the total road network. They generally serve as access-ways, with majority of the developing nations using it for commercial transportation of people and goods. With these low volume roads, come the dust and the need to reduce/eliminate them.
Controlling the dust is a vital factor towards health and safety of the people. It is also one of the largest contributor to air pollution. Generally accepted methods and techniques to control dust on these roads are:
1. Reducing the number and Traffic
Fast moving vehicles will stir up dust. Reducing the number of vehicles as well as the speed of the plying motors can help reduce the amount of dust significantly.
Spreading a layer of gravel in top of the dusty surface will prevent the dust generation. However, due to the lack of bonding between the gravel and the soil particles, the gravel will move from place causing a bumpy ride to motorists. Also, the heavy load from the vehicles might push the gravel into the soil, especially if the road surface do not have enough fines.
3. Bind Soil Particles.
Another kind of dust palliatives includes chemicals which bind fine particles together or onto larger particles. Dust control products like Zycobond are used to bind the particles in place.
4. Sealing with Pavements
Constructing an asphalt pavement on top of the dusty surfaces are a good way to ensure dust control and facilitate faster and smoother movement of people & goods. With the advantages of asphalt pavements, it is a reasonable alternative for adoption.
Windbreaks are barriers designed to slow the speed and redirect the flow of wind. Good windbreaks will not create excessive turbulence or wind eddies. Windbreak materials may include picket and board fences. Windbreaks are most useful when designed for specific wind directions.
Growing vegetation along the road sides is a good dust control measure. Plants not only cover the ground, preventing the dust from blowing away, but also holds the soil particles together by means of its roots.
Other alternatives including spraying calcium chloride and magnesium chloride mixed in water. Sometimes, bitumen emulsions are also used, by spraying over the existing dusty surface, which creates a layer on top of the soil particles, making them heavy enough to prevent being blown away.
Zydex dust control technology provides a solution to a number of problems be it the visibility issues, health problems or deterioration of the quality of roads.