POSSIBILITIES OF POLLUTION TRANSPORT REDUCTION BY PRECIPITATION THROUGH PERVIOUS CONCRETE PAVING FLAGS WITH TiO2

Sve veći razvoj i urbanizacija zahtjeva razvoj novih, modificiranih vrsta betona. Porozni beton je upravo jedan od takvih betona. Njegova svojstva doprinose poboljšanju okoliša i održivog razvoja. Potiče se ekološka svijest zahvaljujući brzoj odvodnji i zbrinjavanju otjecajnih voda te rješavanju problema u urbanim sredinama. Cilj ovog ispitivanja bio je utvrditi utjecaj titanijevog dioksida dodanog u gornji sloj smjese poroznog betona na pronos onečišćenja oborinskim vodama. Uzorci poroznog betona su izloženi ispušnim plinovima, potom tretirani UV svjetlom kako bi se aktivirao fotokatalitiči efekt te su zahvaćeni uzorci vode procijeđene kroz opločnjake. Za razliku od tradicionalnog betona, velika poroznost i hrapavost površine poroznog betona omogućuje da više čestica titanijevog dioksida bude u izravnom kontaktu s UV svjetlom, te samim time poboljša učinkovitost smanjenja pronosa onečišćenja. Rezultati pokazuju da dodatak uspjeva zadržati na sebi određeni dio zagađenja, posebice nitrata, nitirita i organskog ugljika koji i jesu najbitniji parametri obzirom da se radi o onečišćenju nastalom ispušnim plinovima.Increasing development and urbanization demands the development of new, improved types of concrete. Pervious concrete is one of those concretes. Its benefits contribute to improving the environment and sustainable development. Ecological awareness is encouraged thanks to rapid drainage and disposal of drainage water and solving problems in urban environments. The goal of this study was to determine the influence of titanium dioxide added to the top layer of pervious concrete on pollution transmission by stormwater runoff. Specimens of pervious concrete were exposed to exhaust gases, then treated with UV light to activate photocatalytic effect. Water samples were caught during draining through pavement. Unlike traditional non-pervious pavements, the high porosity and surface roughness of pervious concrete pavement allow more 2 particles to have direct contact with UV lights and thus improve removal efficiency. The results show that adding titanium dioxide to pervious concrete compound manages to catch some of the pollution, especially nitrates, nitirites and organic carbon, which are the most important parameters considering its traffic pollution origin