Publication detail

Self-supported Geopolymer-based Barriers for Filtration Applications

KEJÍK, P. BULEJKO, P. SVĚRÁK, T. KRIŠTOF, O. MAYEROVÁ, K.

Original Title

Self-supported Geopolymer-based Barriers for Filtration Applications

English Title

Self-supported Geopolymer-based Barriers for Filtration Applications

Type

abstract

Language

en

Original Abstract

Compact filtration barriers are mostly prepared using ceramic, glass or metal powders joined together via the sintering process which lifts the costs due to its high energy consumption. But there are another ways to create bonds between grains of a powder to ensure certain values of mechanical properties yet maintain the porosity features which are vital for filtration. There is also a group of materials which possess all qualities to replace those aforementioned without high temperature treatment. Geopolymers – materials investigated and somewhere already used in building constructions – are prepared mainly at ambient (or slightly elevated) temperature via a solution mechanism having the strength of sintered materials and one other remarkable advantage – secondary raw materials incorporation. The main aim of the work was to prepare compact porous bodies for filtration applications without significant heat treatment. Porous barriers were prepared from a geopolymer binder based on an alkali-activated blast furnace slag and power plant ash used to aggregate shale particles. The mechanical properties of the prepared materials were tested for comparison with currently used materials. The influence of processing conditions on the mechanical properties of the prepared materials was studied. The structure of the materials was studied using optical microscopy, and characterized by porosimetry. Based on the results of the experiments it was concluded that the mechanical properties are sufficient to use the filtration barriers as self-supported. Filtration barriers based on this material can be used as a support for a membrane or as a filtration barrier itself and have the potential to replace sintered metal or ceramic membranes in many applications with benefit of lower costs and secondary raw materials utilization.

English abstract

Compact filtration barriers are mostly prepared using ceramic, glass or metal powders joined together via the sintering process which lifts the costs due to its high energy consumption. But there are another ways to create bonds between grains of a powder to ensure certain values of mechanical properties yet maintain the porosity features which are vital for filtration. There is also a group of materials which possess all qualities to replace those aforementioned without high temperature treatment. Geopolymers – materials investigated and somewhere already used in building constructions – are prepared mainly at ambient (or slightly elevated) temperature via a solution mechanism having the strength of sintered materials and one other remarkable advantage – secondary raw materials incorporation. The main aim of the work was to prepare compact porous bodies for filtration applications without significant heat treatment. Porous barriers were prepared from a geopolymer binder based on an alkali-activated blast furnace slag and power plant ash used to aggregate shale particles. The mechanical properties of the prepared materials were tested for comparison with currently used materials. The influence of processing conditions on the mechanical properties of the prepared materials was studied. The structure of the materials was studied using optical microscopy, and characterized by porosimetry. Based on the results of the experiments it was concluded that the mechanical properties are sufficient to use the filtration barriers as self-supported. Filtration barriers based on this material can be used as a support for a membrane or as a filtration barrier itself and have the potential to replace sintered metal or ceramic membranes in many applications with benefit of lower costs and secondary raw materials utilization.

Keywords

geopolymer; filtration; alkali-activated; fly ash; slag; membrane

Released

28.09.2016

Publisher

Inštitut za kovinske materiale in tehnologije

Location

Ljubljana, Slovenia

ISBN

978-961-94088-0-3

Book

24th INTERNATIONAL CONFERENCE ON MATERIALSAND TECHNOLOGY

Pages count

1

BibTex


@misc{BUT130230,
  author="Pavel {Kejík} and Pavel {Bulejko} and Tomáš {Svěrák} and Ondřej {Krištof} and Kateřina {Mayerová}",
  title="Self-supported Geopolymer-based Barriers for Filtration Applications",
  annote="Compact filtration barriers are mostly prepared using ceramic, glass or metal powders joined together via the sintering process which lifts the costs due to its high energy consumption. But there are another ways to create bonds between grains of a powder to ensure certain values of mechanical properties yet maintain the porosity features which are vital for filtration. There is also a group of materials which possess all qualities to replace those aforementioned without high temperature treatment. Geopolymers – materials investigated and somewhere already used in building constructions – are prepared mainly 
at ambient (or slightly elevated) temperature via a solution mechanism having the strength 
of sintered materials and one other remarkable advantage – secondary raw materials incorporation.
The main aim of the work was to prepare compact porous bodies for filtration applications without significant heat treatment. Porous barriers were prepared from a geopolymer binder based on an alkali-activated blast furnace slag and power plant ash used to aggregate shale particles. The mechanical properties of the prepared materials were tested for comparison with currently used materials. The influence of processing conditions on the mechanical properties of the prepared materials was studied. The structure of the materials was studied using optical microscopy, and characterized by porosimetry.
Based on the results of the experiments it was concluded that the mechanical properties are sufficient to use the filtration barriers as self-supported. Filtration barriers based on this material can be used as a support for a membrane or as a filtration barrier itself and have the potential to replace sintered metal or ceramic membranes in many applications with benefit of lower costs and secondary raw materials utilization.
",
  address="Inštitut za kovinske materiale in tehnologije",
  booktitle="24th INTERNATIONAL CONFERENCE ON MATERIALSAND TECHNOLOGY",
  chapter="130230",
  howpublished="electronic, physical medium",
  institution="Inštitut za kovinske materiale in tehnologije",
  year="2016",
  month="september",
  publisher="Inštitut za kovinske materiale in tehnologije",
  type="abstract"
}