Contribution of TiO2 and ZnO nanoparticles to the hydration of Portland cement and photocatalytic properties of High Performance Concrete

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F22%3A43924729" target="_blank" >RIV/60461373:22310/22:43924729 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21110/22:00356211

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2214509522000973" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2214509522000973</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cscm.2022.e00965" target="_blank" >10.1016/j.cscm.2022.e00965</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Contribution of TiO2 and ZnO nanoparticles to the hydration of Portland cement and photocatalytic properties of High Performance Concrete

Popis výsledku v původním jazyce

This paper aims to study the hydraulic and photocatalytic behavior of mixtures based on TiO2 and ZnO nanoparticles in cement pastes and High Performance Concretes (HPCs) for the self-cleaning application of building materials. The two nanoparticles were used to partially replace the cement of varying values from 0% to 3% by weight. Cement pastes were characterized by X-ray diffraction, X-Ray Fluorescence, Differential Scanning Calorimetry and Thermogravimetric analyzes to study their compatibility in the cement matrix. The addition of TiO2 in Portland cement resulted in better reactivity by the large presence of hydration products and the appearance of unreacted anatase titanium oxide which is responsible for the photocatalysis process. The cement pastes containing ZnO had clearly indicated the retarding effect of zinc in the hydration of Portland cement. The photocatalytic properties are determined by studying the efficiency of the degradation of nitrogen oxides (NOx) and by monitoring the discoloration of Rhodamine B under UV irradiation of HPC samples. The results showed that the introduction of titanium oxides in the HPCs exhibited a significant degradation efficiency compared to zinc oxide and the samples containing the later underwent greater discoloration of the red color coordinate (Rt). © 2022 The Authors

Název v anglickém jazyce

Contribution of TiO2 and ZnO nanoparticles to the hydration of Portland cement and photocatalytic properties of High Performance Concrete

Popis výsledku anglicky

This paper aims to study the hydraulic and photocatalytic behavior of mixtures based on TiO2 and ZnO nanoparticles in cement pastes and High Performance Concretes (HPCs) for the self-cleaning application of building materials. The two nanoparticles were used to partially replace the cement of varying values from 0% to 3% by weight. Cement pastes were characterized by X-ray diffraction, X-Ray Fluorescence, Differential Scanning Calorimetry and Thermogravimetric analyzes to study their compatibility in the cement matrix. The addition of TiO2 in Portland cement resulted in better reactivity by the large presence of hydration products and the appearance of unreacted anatase titanium oxide which is responsible for the photocatalysis process. The cement pastes containing ZnO had clearly indicated the retarding effect of zinc in the hydration of Portland cement. The photocatalytic properties are determined by studying the efficiency of the degradation of nitrogen oxides (NOx) and by monitoring the discoloration of Rhodamine B under UV irradiation of HPC samples. The results showed that the introduction of titanium oxides in the HPCs exhibited a significant degradation efficiency compared to zinc oxide and the samples containing the later underwent greater discoloration of the red color coordinate (Rt). © 2022 The Authors

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/EF16_027%2F0008465" target="_blank" >EF16_027/0008465: Mezinárodní mobility výzkumných pracovníků ČVUT</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Case Studies in Construction Materials

ISSN

2214-5095

e-ISSN

2214-5095

Svazek periodika

16

Číslo periodika v rámci svazku

June 2022

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

nestrankovano

Kód UT WoS článku

000788271200004

EID výsledku v databázi Scopus

2-s2.0-85124968402