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What is Pavement?

This article will discuss photocatalytic pavement, but before we delve deeper into that topic, we first need to understand what we mean when we are referring to pavement. The word can be used as a synonym for ground surfacing or overlaying and essentially refers to a layer of any material used to protect or adorn a surface and is characterised by its resistance to scratches as well as other forms of wear and tear.


Normally, paving is a layer of asphalt used for constructing different types of roads, pavement for pedestrians to walk on, car parks or roadways. It is also often considered to be an additional element of the roadway itself and a fundamental part of its structure and composition of the infrastructure.



What is Photocatalytic Pavement?


Photocatalytic pavement can be defined using three words: sustainable, resistant and durable. It offers a variety of benefits to improve the quality of air in urban environments. That is to say, these forms of pavement  are made using photocatalytic materials that  are capable of reducing the concentration of pollution from gases and decreasing the effect of accumulated heat in urban areas of large cities. The pollution in question is mainly the result of the extensive use of vehicles on roadways. For that reason, using this type of innovative and environmental pavement is a positive solution for helping to reduce air pollution, especially in cities where there are large concentrations of people.


It  is  composed  of  photocatalytic  properties  based  on  nanomaterials  that  utilise  solar  energy through  the  semiconductor  T iO2  and  certain  derivatives  to  eliminate  a  large  part  of  the contaminating elements present in the air. In this way, a chemical reaction is produced of the photocatalysis through the action of the light and sun and a photocatalyst that accelerates the rate at which these contaminating compositions decompose.




What Are the Benefits of This Type of Pavement?

In  general,  photocatalytic  pavements  are  capable  of  converting  a  roadway  or  a  pedestrian pavement into an active element to help combat air pollution. Considering the fact that the air we breathe is full of toxic contaminants, such as nitrogen oxide NOx,   ammonia NH3 , or hydrocarbon compounds, which are harmful for human health and  the environment  as well as difficult to decompose naturally. Below is a list of seven benefits that result from the use of photocatalytic pavement:

1. It directly reduces the contaminants in the air, especially in urban area

2. It decreases respiratory and ocular illnesses for large populations of people.

3. It reduces the effects of heat accumulation in urban areas within citie

4. It cleans the surface efficiently when it rains and acts upon the compounds.

5. It maintains its durability for a prolonged period of time because its decontaminating effects bring it to its original state when they come into contact with water.

6. It is still effective even after prolonged exposition to ultraviolet UV radiation as well as cycles of freezing and unfreezing while de-icing salts are in use.

7. It contains  nanometric  particles  that  are  strongly  adhered.  This  means  that  even  after prolonged use and different forms of abrasion, it does not generate harmful dusts that are harmful for the health of those people using the pavement.




Are They Currently In Use?

As mentioned previously, this type of pavement is a construction product with photocatalytic properties capable of converting a roadway or a pedestrian pavement into an active element that helps to fight against air contamination. The materials used for the production of these products have an added value of sustainability and durability. As a result, there are various innovative solutions for building roadways and pavements that improve the quality of air in urban environments.


A) Paving setts

B) Premade or premixed pavement

C) Porous asphalt with percolating slurry



Of the photocatalytic solutions mentioned above, the paving setts represent an adequate and more economical solution, as they offer a wide variety of applications for roadways, parking lots, commercial areas, pedestrian pavements, crosswalks, reduced speed areas and bicycle routes and they require an optimal process for manufacturing, where there are two layers and the upper layer is photocatalytic.



There are also functional and mechanical tests being performed on these materials to investigate their behaviour when in contact with traffic loadings. These investigations are being carried out in order to guarantee that they indeed have de-polluting effects as well as withstand the hard wear and tear of time, weather conditions and traffic conditions.


In any event, it is also important to revise and keep in mind the municipal regulations of the location in question. If you would like more information about this or other subjects, do not hesitate to contact us at or read related articles on our website.


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