Elemental leaching of metakaolin based geopolymers was investigated by immersing hardened paste specimens in a solution. For this, pure water and 0.1 molar acetic acid solutions were replenished ten times distributed over 56 days total. Dissolution diffusion the elements through from geopolymer into surrounding on cross-sections SEM-EDS microscopy, indentation, X-ray powder diffraction analysis...

Three common solid wastes (waste incineration fly ash, sewage sludge, and polluted soil) were the raw materials used in synthesis of a geopolymer–type zeolite–like product, which was then as catalyst carrier to prepare nickel hydrogenation for catalytic levulinic acid γ–valerolactone. Under optimum conditions, synthesized geopolymer zeolite has excellent structure performance. The characterizat...

Geopolymer concrete is preferred over OPC due to its use of energy waste such as fly ash, making it more sustainable and energy-efficient. However, limited research has been done on seismic characterization in confined masonry, highlighting a gap earthquake-resistant structures. Our study compares the performance alkali-activated fly-ash-based geopolymer bare frame masonry wall panels with conv...

Abstract In this experimental study, two different cementitious materials, including (i) a class of expansive cement currently used for plug and abandonment (P&A) operations (ii) non-cement-based naturally occurring rock, known as geopolymer, are selected to examine the hydraulic bond strength shear strength. Clean machined steel rusty corroded were represent casing. The test samples cured ...

In this research, the ordinary Portland cement (OPC) was mixed with metakaolin, activator, hydrogen peroxide, and olive oil to synthesize hybrid geopolymer foam. The obtained results indicated internal heat release throughout OPC hydration in combination. employed as a calcium source geopolymers (Geopolymer-Portland (HGPF)) explore curing process of at ambient temperature. functionality compone...

Protection, restoration, and regeneration of aquatic habitats are an increasingly important issue requiring intensive research. In the marine environment, artificial reefs may be deployed to help offset habitat loss, increase local biodiversity stimulate recovery ecosystems. This study aimed at fabrication by 3D printing. framework European INTERREG Atlantic Area collaborative project “3DPARE”,...

In this work, the effects of slag addition on geopolymerization process and sulfate resistance alkali-activated cement were studied. The substitution metakaolin by increased reactivity precursors, contributing to a higher reaction rate accelerating process. mechanical properties significantly improved with incorporation slag. results show that transformation gel phases development pore structur...