Influence of adding metakaolin to high-strength concrete

The need to build structures that are durable and resistant to aggressive environments has led to the development of high-strength concrete. Such activities generate high cement consumption, a factor that implies CO2 emissions. The aim of this study was to evaluate the influence of pozzolan with the addition of metakaolin on the physical-mechanical characteristics of high-strength concrete, comparing them with the standard formulation. Tests were carried out to characterize the aggregates (NBR 7211), petrography tests (NBR 15577 - 3/08) and alkali-aggregate reaction (NBR 15577-05/08). Test specimens were made in accordance with standard NBR 5738-1/04 with additions of 0%, 4%, 6%, 8% and 10% of metakaolin to replace CP V cement in the formulations. Spreading and compressive strength tests were carried out in accordance with standards NBR 7223/1992 and NBR 5739-8/94 respectively. All the formulations with added metakaolin had a higher 28-day breaking strength than the standard formulation. These results provide an alternative for reducing CO2 emissions, as well as improving the quality and durability of the concrete.

Autorentext

Faisy P. Pereira Soares Brazylijka, 34 lata Magister in ynier technologii mechanicznej w produkcji mechanicznej 6/2011 do 5/2013 Wobben Wind Power - inspektor jaköci 3/2013 do 3/2015 IFRN. Podinspektor techniczny 9/2015 do 12/2015 Szkolenie w Emden, Niemcy 5/2016 do 12/2016 Enercon - analityk QA w UY. 5/2015 do chwili obecnej Wobben W. Power.