A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Metakaolinite/TiO2 composite: Photoactive admixture for building materials based on Portland cement binder
Highlights ► Anatase nanoparticles captured on the surface of metakaolinite. ► Photoactive latent hydraulic admixture metakaolinite/TiO2. ► Cement mortars containing photocatalytically active admixture metakaolinite/TiO2. ► Photocatalytic removal of NO over the surface of mortars with novel admixture.
Abstract Novel latent hydraulic and photoactive admixture metakaolinite/TiO2 was prepared, characterized and evaluated as a partial replacement for the Portland cement in mortars. The main component of this novel composite material is metakaolinite containing the anatase nanoparticles anchored on its surface. The values of the compression strength measured for the mortars containing metakaolinite/TiO2 composites reached higher values in comparison to the mortar without this admixture. Photodegradation activity of the mortars with given amount of the metakaolinite/TiO2 admixture against nitric oxide (NO) was tested using the modified ISO standard. The results showed that the conversion of NO increases with the increasing content of TiO2. The synergistic effect of the photodegradation activity and the latent hydraulicity in this material can be utilized in building industry to decrease concentration of selected air pollutants e.g. in areas affected by traffic pollution.
Metakaolinite/TiO2 composite: Photoactive admixture for building materials based on Portland cement binder
Highlights ► Anatase nanoparticles captured on the surface of metakaolinite. ► Photoactive latent hydraulic admixture metakaolinite/TiO2. ► Cement mortars containing photocatalytically active admixture metakaolinite/TiO2. ► Photocatalytic removal of NO over the surface of mortars with novel admixture.
Abstract Novel latent hydraulic and photoactive admixture metakaolinite/TiO2 was prepared, characterized and evaluated as a partial replacement for the Portland cement in mortars. The main component of this novel composite material is metakaolinite containing the anatase nanoparticles anchored on its surface. The values of the compression strength measured for the mortars containing metakaolinite/TiO2 composites reached higher values in comparison to the mortar without this admixture. Photodegradation activity of the mortars with given amount of the metakaolinite/TiO2 admixture against nitric oxide (NO) was tested using the modified ISO standard. The results showed that the conversion of NO increases with the increasing content of TiO2. The synergistic effect of the photodegradation activity and the latent hydraulicity in this material can be utilized in building industry to decrease concentration of selected air pollutants e.g. in areas affected by traffic pollution.
Metakaolinite/TiO2 composite: Photoactive admixture for building materials based on Portland cement binder
Matějka, V. (author) / Matějková, P. (author) / Kovář, P. (author) / Vlček, J. (author) / Přikryl, J. (author) / Červenka, P. (author) / Lacný, Z. (author) / Kukutschová, J. (author)
Construction and Building Materials ; 35 ; 38-44
2012-02-25
7 pages
Article (Journal)
Electronic Resource
English
Metakaoline , Anatase , Latent hydraulicity , Cement mortar , Photodegradation activity , K , kaolin , OPC , ordinary Portland cement , K600 , kaolin calcined at 600<hsp></hsp>°C , KATI , general assignment for kaolinite/TiO<inf>2</inf> composite , KATI11 , composite dried at 105<hsp></hsp>°C and containing 10<hsp></hsp>wt.% of TiO<inf>2</inf> , KATI16 , composite dried at 105<hsp></hsp>°C and containing 60<hsp></hsp>wt.% of TiO<inf>2</inf> , KATI61 , composite calcined at 600<hsp></hsp>°C and containing 10<hsp></hsp>wt.% of TiO<inf>2</inf> , KATI66 , composite calcined at 600<hsp></hsp>°C and containing 60<hsp></hsp>wt.% of TiO<inf>2</inf> , P_OPC , hardened cement paste , P_OPC/KATI66 , hardened paste containing Portland cement and composite KATI66 in weight ratio 1:1 , STD , standard cement mortar , S5K600 , mortars containing 5<hsp></hsp>wt.% of K600 as a replacement of OPC , S10K600 , mortars containing 10<hsp></hsp>wt.% of K600 as a replacement of OPC , S15K600 , mortars containing 15<hsp></hsp>wt.% of K600 as a replacement of OPC , S5KATI61 , mortars containing 5<hsp></hsp>wt.% of KATI61 as a replacement of OPC , S10KATI61 , mortars containing 10<hsp></hsp>wt.% of KATI61 as a replacement of OPC , S15KATI61 , mortars containing 15<hsp></hsp>wt.% of KATI61 as a replacement of OPC , S5KATI66 , mortars containing 5<hsp></hsp>wt.% of KATI66 as a replacement of OPC , S10KATI66 , mortars containing 10<hsp></hsp>wt.% of KATI66 as a replacement of OPC , S15KATI66 , mortars containing 15<hsp></hsp>wt.% of KATI66 as a replacement of OPC
| British Library Online Contents | 2012
| British Library Online Contents | 2012
The pozzolanic reaction of metakaolinite and its effects on Portland cement hydration
| Tema Archive | 1993