Testing of Surface Photoactivity of Fibre-Cement Composites

Martin Boháč; Theodor Staněk; Petr Urbánek

doi:10.4028/www.scientific.net/AMR.1000.35

Paper Titles

The Effect of Boron and its Compounds on Setting of Portland Cement
p.16

Combination of Various Admixtures as Partial Replacement for Portland Cement and the Influence on the Final Concrete Properties
p.20

Hydration of Calcium Aluminate Phases at Different Temperatures
p.24

Recycled Poly(Vinyl Butyral) Used as a Barrier to Prevent Mortar Carbonation
p.28

Testing of Surface Photoactivity of Fibre-Cement Composites
p.35

The Role of Metakaolin Fineness on Rheological Properties of Cement Pastes
p.39

The Influence of Zinc on the Hydration and Compressive Strength of Portland Cement
p.43

Calcium Aluminate Cement and Porcelain
p.47

Monitoring the Influence of Dehydrating Solutions for the Production of Alpha Gypsum
p.51

HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1000Testing of Surface Photoactivity of Fibre-Cement...

Testing of Surface Photoactivity of Fibre-Cement Composites

Abstract:

Paper deals with testing of surface photoactivity of fibre-cement composites. Self-cleaning ability, de-NO_x activity, visual stability and weathering resistance were tested. Carriers of photoactivity were four different nanopowders with high content of anatase; crystalline form of TiO₂. Photocatalytic properties of TiO₂ particles are maintained even after mixing with cement in composite matrix. Natural photolysis as reaction of material and UV light is accelerated in presence of a proper form of TiO₂ as a catalyst which by producing free radicals is able to oxidize organic matter and even small inorganic particles. Oxidized material is mostly less harmful considering the de-NO_x process and decomposition of other gaseous pollutants. By this reaction the surface of composites containing large number of TiO₂ particles is able to maintain its original appearance by so called self-cleaning ability.