Author
Valeria F.F. Barbosa
Bio: Valeria F.F. Barbosa is an academic researcher from Instituto Militar de Engenharia. The author has contributed to research in topics: Sodium silicate & Geopolymer. The author has an hindex of 3, co-authored 3 publications receiving 1465 citations.
Papers
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TL;DR: In this article, a statistical study of the effect on the polymerization process of the molar ratio of the component oxides and the water content of the mixture showed the latter to be a critical parameter.
933 citations
TL;DR: In this paper, a series of geopolymer composites were prepared containing 10−20% of various granular inorganic fillers ranging from waste demolition materials through mineral tailings to engineering ceramics.
454 citations
TL;DR: In this paper, the thermal stability of the K-polysialate and K-PSDS has been investigated and it has been shown that the charge-balancing alkali ions in these two networks behave similarly to those of Na geopolymers, dehydrating on heating and moving into the feldspar lattice.
308 citations
TL;DR: In this article , a phenomenological description for the nonlinear dielectric permittivity dependence on magnetic field, also called magnetodielectric (MD) Effect, in strain mediated magnetoelectric composites was derived by incorporating the dielectrics dependence on electric polarization, thermodynamic constitutive equations, and magneto-mechanical effects.
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TL;DR: A brief history and review of geopolymer technology is presented with the aim of introducing the technology and the vast categories of materials that may be synthesized by alkali activation of aluminosilicates as mentioned in this paper.
Abstract: A brief history and review of geopolymer technology is presented with the aim of introducing the technology and the vast categories of materials that may be synthesized by alkali-activation of aluminosilicates. The fundamental chemical and structural characteristics of geopolymers derived from metakaolin, fly ash and slag are explored in terms of the effects of raw material selection on the properties of geopolymer composites. It is shown that the raw materials and processing conditions are critical in determining the setting behavior, workability and chemical and physical properties of geopolymeric products. The structural and chemical characteristics that are common to all geopolymeric materials are presented, as well as those that are determined by the specific interactions occurring in different systems, providing the ability for tailored design of geopolymers to specific applications in terms of both technical and commercial requirements.
3,302 citations
TL;DR: In this paper, the potential position of and drivers for inorganic polymers (“geopolymers”) as an element of the push for a sustainable concrete industry are discussed.
1,444 citations
TL;DR: In this paper, a mechanistic model accounting for reduced structural reorganization and densification in the microstructure of geopolymer gels with high concentrations of soluble silicon in the activating solution has been proposed.
1,309 citations
TL;DR: In this article, the authors present the results of comprehensive carbon footprint estimates for both geopolymer and OPC concrete, including energy expending activities associated with mining and transport of raw materials, manufacturing and concrete construction.
1,274 citations
TL;DR: Aluminosilicate-based alkaline cements have been classified into five categories as discussed by the authors, and the key advances made in the understanding of synthetic gels are discussed, which ultimately finds hybrid cements to be technologically viable materials for contemporary construction.
1,104 citations