Publication detail

The Influence of Alkaline Activator Type on the Carbonatation process of the Alkali-activated Blast Furnace Slag

HRUBÝ, P. BÍLEK, V. KALINA, L. ŠOUKAL, F. TOPOLÁŘ, L. DVOŘÁK, R.

Original Title

The Influence of Alkaline Activator Type on the Carbonatation process of the Alkali-activated Blast Furnace Slag

English Title

The Influence of Alkaline Activator Type on the Carbonatation process of the Alkali-activated Blast Furnace Slag

Type

abstract

Language

en

Original Abstract

Carbonatation represents one of the potential degradation mechanisms of the construction materials. The negative impact of the carbonatation are mainly accompanied by the decrease of the pH of the pore solution under the certain value (9–10) and the formation of reaction products (various types of carbonates or bicarbonates). The progress of the carbonatation is significantly dependent on the experimental conditions like the partial pressure of CO2 or the humidity. The various types of alkaline activators (sodium hydroxide, sodium carbonate and sodium water glass) in 6 % Na2O dosages were used in this study for the preparation of the alkali-activated blast furnace slag samples for further carbonatation testing when exposed to various environments – exterior, interior, CO2 chamber and water. The progress of carbonatation was evaluated with a meaning of carbonatation depth determination using the phenolphthalein technique and optical analysis method. The impact of the carbonatation on the mechanical properties was assessed by the compressive and flexural strength measurements. No rapid deterioration of the mechanical properties was observed in case of the sodium hydroxide alkaline activation process. However, a noticeable changes were found for the sodium water glass activated systems especially in terms of exterior and interior storage.

English abstract

Carbonatation represents one of the potential degradation mechanisms of the construction materials. The negative impact of the carbonatation are mainly accompanied by the decrease of the pH of the pore solution under the certain value (9–10) and the formation of reaction products (various types of carbonates or bicarbonates). The progress of the carbonatation is significantly dependent on the experimental conditions like the partial pressure of CO2 or the humidity. The various types of alkaline activators (sodium hydroxide, sodium carbonate and sodium water glass) in 6 % Na2O dosages were used in this study for the preparation of the alkali-activated blast furnace slag samples for further carbonatation testing when exposed to various environments – exterior, interior, CO2 chamber and water. The progress of carbonatation was evaluated with a meaning of carbonatation depth determination using the phenolphthalein technique and optical analysis method. The impact of the carbonatation on the mechanical properties was assessed by the compressive and flexural strength measurements. No rapid deterioration of the mechanical properties was observed in case of the sodium hydroxide alkaline activation process. However, a noticeable changes were found for the sodium water glass activated systems especially in terms of exterior and interior storage.

Keywords

Alkali-activated blast furnace slag, carbonatation, carbonatation depth, degradation

Released

27.11.2020

Publisher

Vysoké učení technické v Brně, Fakulta chemická, Purkyňova 464/118, 612 00 Brno

Location

Brno

ISBN

978-80-214-5920-0

Book

Studentská odborná konference - CHEMIE JE ŽIVOT - sborník abstraktů

Edition number

první

Pages from

73

Pages to

74

Pages count

1

URL

Documents

BibTex


@misc{BUT169247,
  author="Petr {Hrubý} and Vlastimil {Bílek} and Lukáš {Kalina} and František {Šoukal} and Libor {Topolář} and Richard {Dvořák}",
  title="The Influence of Alkaline Activator Type on the Carbonatation process of the Alkali-activated Blast Furnace Slag",
  annote="Carbonatation represents one of the potential degradation mechanisms of the construction materials. The negative impact of the carbonatation are mainly accompanied by the decrease of the pH of the pore solution under the certain value (9–10) and the formation of reaction products (various types of carbonates or bicarbonates). The progress of the carbonatation is significantly dependent on the experimental conditions like the partial pressure of CO2 or the humidity. The various types of alkaline activators (sodium hydroxide, sodium carbonate and sodium water glass) in 6 % Na2O dosages were used in this study for the preparation of the alkali-activated blast furnace slag samples for further carbonatation testing when exposed to various environments – exterior, interior, CO2 chamber and water. The progress of carbonatation was evaluated with a meaning of carbonatation depth determination using the phenolphthalein technique and optical analysis method. The impact of the carbonatation on the mechanical properties was assessed by the compressive and flexural strength measurements. No rapid deterioration of the mechanical properties was observed in case of the sodium hydroxide alkaline activation process. However, a noticeable changes were found for the sodium water glass activated systems especially in terms of exterior and interior storage.",
  address="Vysoké učení technické v Brně, Fakulta chemická, Purkyňova 464/118, 612 00 Brno",
  booktitle="Studentská odborná konference - CHEMIE JE ŽIVOT - sborník abstraktů",
  chapter="169247",
  howpublished="online",
  institution="Vysoké učení technické v Brně, Fakulta chemická, Purkyňova 464/118, 612 00 Brno",
  year="2020",
  month="november",
  pages="73--74",
  publisher="Vysoké učení technické v Brně, Fakulta chemická, Purkyňova 464/118, 612 00 Brno",
  type="abstract"
}