Topic
Geopolymer
About: Geopolymer is a research topic. Over the lifetime, 6776 publications have been published within this topic receiving 157991 citations. The topic is also known as: geopolymers.
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TL;DR: In this paper, self-compact geopolymer concrete (SCGC) is proposed as an improved way to satisfy the ever increasing societal needs alongside with the advancement of technology.
Abstract: Concrete performance expectation has risen to satisfy the ever increasing societal needs alongside with the advancement of technology. Self-compacting geopolymer concrete (SCGC) is an improved way ...
63 citations
TL;DR: In this article, the Bayer process liquors were used as a primary source of caustic sodium aluminate and to add locally available fly ash as a source of reactive silica and additional alumina.
Abstract: Previously, caustic residues such as red mud and sodium oxalate have been used to provide filler and as a supplementary source of alkali for geopolymers. However, rather than incorporation of dilute alkali residues within geopolymer precursors, a significant counter-intuitive approach is to synthesise geopolymers using Bayer process liquors as a primary source of caustic sodium aluminate and to add locally available fly ash as a source of reactive silica and additional alumina. In addition to the potential for using significant quantities of industrial residues to manufacture geopolymers, these relatively new cements have the ability to bind a range of contaminants. As the Bayer process could achieve significant process impurity removal by utilisation of plant liquor, synergy between the alumina and geopolymer industries could be achieved. Geopolymers with a Si/Al ratio of 2.3 and a Na/Al ratio of 0.8 were targeted. With only synthetic plant liquor as the alkali activator, geopolymers with a mean compressive strength of 33 MPa were synthesised, while use of processed plant liquor resulted in compressive strengths of 43 MPa.
63 citations
TL;DR: In this article, a water floatable and permeable geopolymer block from industrial by-product fly ash is presented, which can be used as low cost replacement for zeolites in applications such as waste water treatment at high mass transport rate.
63 citations
TL;DR: The effect of 0-60% limestone powder in thermally activated halloysite clay (TAH) based geopolymer pastes cured at 24°± 2°C was investigated in this paper, where the alkaline solutions used were mixtures of sodium silicate and sodium hydroxide (NaOH) solution at various molarities.
63 citations
TL;DR: In this paper, the pre-dry mixing process was compared with the general mixing and separate mixing processes, which have been previously studied, and compared with another alternative new mixing method called the pre dry mixing process, which could prove beneficial for curing purposes.
Abstract: The manufacturing process of geopolymer cement generally uses alkaline solutions mixed with alumina-silicate prime materials to form a cement paste. Other factors may be set up for the designated experiment, e.g., material constituents, activator’s concentration and curing regimes. One of the latent factors influencing the properties of geopolymer, which has received less attention, is a mixing method. General mixing and separate mixing processes, which have been previously studied, were synthesized as controlled procedures and compared with another alternative new mixing method called the pre-dry mixing process. The results have shown that the pre-dry mixing process provided high potential heat liberation, which could prove beneficial for curing purposes. It is confirmed that the proper mixing order leads to better results, especially for any of the alkaline-activated cementitious binders. With more practicality in field application, by just adding water, this process could be developed and appli...
63 citations