Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Alkali-activated binders based on ground granulated blast furnace slag and phosphogypsum
https://orcid.org/0000-0001-9899-5269
Highlights Effect of phosphogypsum on reactivity, strength and final matrix properties. Faster initial and delayed final setting time. Compressive strength is enhanced when sodium hydroxide is used as alkali activator. The Al/Si and Ca/Si ratios in the C-A-S-H gels decreased. Incorporation gave rise to a higher polymerized network.
Abstract The effect of phosphogypsum (PG) in alkali-activated ground granulated blast furnace slag (GGBFS) on the reactivity, strength development and final matrix properties was investigated, as a function of alkali activator. The results were compared with alkali-activated reference samples from GGBFS. PG completely dissolves and takes part in solid reaction product formation. Upon PG incorporation, portlandite and ettringite are initially formed after dissolution. The hardened binder consists mainly of amorphous hydration products, intermixed with thenardite and minor amounts of secondary gypsum and merwinite. PG incorporation resulted in faster initial and delayed final setting time, while it enhanced the compressive strength and amorphous phase development when sodium hydroxide was used. PG gave rise to a decrease of Al/Si and Ca/Si ratios in the C-A-S-H gels and a higher polymerized network.
Alkali-activated binders based on ground granulated blast furnace slag and phosphogypsum
https://orcid.org/0000-0001-9899-5269
Highlights Effect of phosphogypsum on reactivity, strength and final matrix properties. Faster initial and delayed final setting time. Compressive strength is enhanced when sodium hydroxide is used as alkali activator. The Al/Si and Ca/Si ratios in the C-A-S-H gels decreased. Incorporation gave rise to a higher polymerized network.
Abstract The effect of phosphogypsum (PG) in alkali-activated ground granulated blast furnace slag (GGBFS) on the reactivity, strength development and final matrix properties was investigated, as a function of alkali activator. The results were compared with alkali-activated reference samples from GGBFS. PG completely dissolves and takes part in solid reaction product formation. Upon PG incorporation, portlandite and ettringite are initially formed after dissolution. The hardened binder consists mainly of amorphous hydration products, intermixed with thenardite and minor amounts of secondary gypsum and merwinite. PG incorporation resulted in faster initial and delayed final setting time, while it enhanced the compressive strength and amorphous phase development when sodium hydroxide was used. PG gave rise to a decrease of Al/Si and Ca/Si ratios in the C-A-S-H gels and a higher polymerized network.
Alkali-activated binders based on ground granulated blast furnace slag and phosphogypsum
https://orcid.org/0000-0001-9899-5269
Highlights Effect of phosphogypsum on reactivity, strength and final matrix properties. Faster initial and delayed final setting time. Compressive strength is enhanced when sodium hydroxide is used as alkali activator. The Al/Si and Ca/Si ratios in the C-A-S-H gels decreased. Incorporation gave rise to a higher polymerized network.
Abstract The effect of phosphogypsum (PG) in alkali-activated ground granulated blast furnace slag (GGBFS) on the reactivity, strength development and final matrix properties was investigated, as a function of alkali activator. The results were compared with alkali-activated reference samples from GGBFS. PG completely dissolves and takes part in solid reaction product formation. Upon PG incorporation, portlandite and ettringite are initially formed after dissolution. The hardened binder consists mainly of amorphous hydration products, intermixed with thenardite and minor amounts of secondary gypsum and merwinite. PG incorporation resulted in faster initial and delayed final setting time, while it enhanced the compressive strength and amorphous phase development when sodium hydroxide was used. PG gave rise to a decrease of Al/Si and Ca/Si ratios in the C-A-S-H gels and a higher polymerized network.
Alkali-activated binders based on ground granulated blast furnace slag and phosphogypsum
Gijbels, Katrijn (Autor:in) / Iacobescu, Remus Ion (Autor:in) / Pontikes, Yiannis (Autor:in) / Schreurs, Sonja (Autor:in) / Schroeyers, Wouter (Autor:in)
Construction and Building Materials ; 215 ; 371-380
24.04.2019
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2018
Hydration of alkali-activated ground granulated blast furnace slag
| British Library Online Contents | 2000
Hydration of alkali-activated ground granulated blast furnace slag
| Tema Archiv | 2000