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, fly ash from the 4th thermal power station of Ulaanbaatar city has been used as a raw material for producing geopolymers suitable for construction applications; these are its high radium equivalent radioactivity resulting from the radioactive Mongolian coal burnt in this power station (314-343 Bq/kg), and its high CaO content (14-30 Wt%).
68 citations
TL;DR: In this article, the physical and mechanical properties of a SBA-based geopolymer with various percentages of (PP)(PP) fibers were evaluated through the experiments and discussed in detail.
Abstract: Recently, the lightweight geopolymer production from wastes got adamant attention for sustainable and green building construction. But lower flexure and the tensile strength limit its wider application in the construction industry. This study was intended to prepare sugarcane bagasse ash (SBA) based geopolymer reinforced with (PP) (PP) fibers. The physical and mechanical properties of geopolymers with various percentages of (PP) (PP) fibers were evaluated through the experiments and discussed in detail. The addition of (PP) fibers resulted in enhanced flexural and tensile strength. Results assert that by limiting the content of (PP) fibers to 1%, not only improve in the flexural properties but also enhance the compressive strength by providing denser microstructure. This study concludes that the use of (SBA) composite reinforced with (PP) fibers can provide alternative ways to achieve sustainability by utilizing the wastes which mainly cause environmental degradation during landfilling.
68 citations
TL;DR: In this article, the influence of type of fiber on inter-layer bond strength and flexural strength of extrusion-based 3D printed geopolymer was investigated, and the results indicated that the incorporation of fibers reduced the inter layer bond strength.
Abstract: Extrusion-based 3D concrete printing is analogous to fused deposition modeling method, which extrudes cementitious materials from a nozzle to build a complex concrete structure layer-by-layer without the use of expensive formwork. This study aims to investigate the influence of type of fiber on inter-layer bond strength and flexural strength of extrusion-based 3D printed geopolymer. An extrudable fly ash-based geopolymer composition previously developed by the authors was reinforced by three types of fibers, namely polyvinyl alcohol (PVA), polypropylene (PP) and polyphenylene benzobisoxazole (PBO) fibers. Control geopolymer specimens with no fiber were also 3D printed for comparison purposes. The results indicated that the incorporation of fibers reduced the inter-layer bond strength of 3D printed geopolymer. This pattern was true regardless of the type of fiber. On the other hand, the flexural strength of 3D printed fiber-reinforced geopolymer mixtures was substantially higher than that of the 3D printed geopolymer with no fiber. The rate of increase in the flexural strength depended on the type of fiber. The flexural failures of the specimens were due to the tensile failure of the bottom layer, rather than the shear failure of the interfaces.
68 citations
TL;DR: In this article, a fire resistant coating for tunnel passive fire protection and its performance under thermal loading is presented, which falls under the class of potassium based geopolymers (K-geopolymers) and was prepared by mixing ferronickel (FeNi) slag, doped with pure alumina, with a highly alkaline potassium hydroxide aqueous phase.
68 citations
TL;DR: In this article, the authors focus on the durability of geopolymer concrete after nine months of an indoor and outdoor curing period and show that the compressive strength of the concrete can reach 67.5 MPa and 53 MPa after 180 days of indoor/outdoor curing, respectively.
68 citations