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.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the effect of fly ash activation on the properties of the geopolymers cured at ambient temperature has been studied and after 28 days, compressive strength of the room temperature cured samples was 16 (2) and 45 (8) MPa for unmilled and mechanically activated fly ash based samples, respectively.
378 citations
TL;DR: In this article, the authors investigated the properties of slag mortar and concretes with partial fly ash substitution and showed that the chemistry of the binding gels significantly controls the mass and ionic transport in chloride-containing environments.
373 citations
TL;DR: In this article, the authors present a concise review of the current studies on the utilization of industrial by-products as the primary binder materials in the fabrication of geopolymer concrete.
369 citations
TL;DR: In this paper, the feasibility of utilizing copper mine tailings for production of eco-friendly bricks based on the geopolymerization technology was studied, which neither uses clay and shale nor requires high temperature kiln firing, having significant environmental and ecological benefits.
358 citations
TL;DR: In this paper, a fly ash with partial slag substitution was used for GFC synthesis by mechanical mixing of preformed foam, and the GFCs exhibited 28 d compressive strengths ranging from 3 to 48 MPa with demolded densities from 720 to 1600 kg/m3 (105 °C oven-dried densities ranging from 585 to 1370 kg /m3), with the different densities achieved through alteration of the foam content.
Abstract: This study reports the synthesis and characterization of geopolymer foam concrete (GFC). A Class F fly ash with partial slag substitution was used for GFC synthesis by mechanical mixing of preformed foam. The GFCs exhibited 28 d compressive strengths ranging from 3 to 48 MPa with demolded densities from 720 to 1600 kg/m3 (105 °C oven-dried densities from 585 to 1370 kg/m3), with the different densities achieved through alteration of the foam content. The thermal conductivity of GFCs was in the range 0.15–0.48 W/m K, showing better thermal insulation properties than normal Portland cement foam concrete at the same density and/or at the same strength. The GFC derived from alkali activation of fly ash as a sole precursor showed excellent strength retention after heating to temperatures from 100 to 800 °C, and the post-cooling compressive strength increased by as much as 100% after exposure at 800 °C due to densification and phase transformations. Partial substitution of slag for fly ash increased the strength of GFC at room temperature, but led to notable shrinkage and strength loss at high temperature. Thin GFC panels (20–25 mm) exhibited acoustic absorption coefficients of 0.7–1.0 at 40–150 Hz, and 0.1–0.3 at 800–1600 Hz.
356 citations