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In this paper, series of ceramic-based geopolymers were prepared with the utilization of ceramic waste powder, alkali activated by the mixtures of sodium hydroxide and sodium silicate (water glass) with the silicate moduli ranging from 0.8 to 1.4. The studied samples were cured for 7 days at temperatures of 60 °C to speed up …

Class F FA-based geopolymers activated with sodium hydroxide and sodium silicate used to stabilise sandy clay resulted in a UCS of 11.4 MPa [].Other researchers have also tested this combination, and it has been efficient in stabilising sandy and silty soils [54, 64].A strength enhancement of up to 4 MPa was noted when …

Since geopolymers are similar to ceramic materials and can carry certain loads even at very high temperatures, there is reason to believe that they can also be useful for making molds for thermite welding of railroad rails. The operation, maintenance, and construction of contactless tracks requires the use of professional technologies and ...

Selected alkali-based porous ceramic clay polymer materials applied to CO 2 adsorption exhibit excellent performance for better separation of CO 2 /N 2 and CO 2 /CH 4 gases, ... Geopolymers are strongly influenced by various factors, and the mechanisms should be explored in depth. For example, how does the ratio of raw materials affect the ...

Manufacturing lunar and Martian shelters based on geopolymer composites; Applications in the underwater environment for geopolymer composites. This Special …

XRD of the resulting geopolymers, based on NatMK and SynMK, showed that the diffraction "halo" of the starting metakaolins at 23° two-theta shifted to 28° two-theta after reaction with alkali-silicate solutions.

The results showed that the compressive strength of geopolymers at 28 days of curing is directly proportional to the ratio of the alkali liquid. ... Int. J. Appl. …

Researchers have been driven to investigate sustainable alternatives to cement production, such as geopolymers, due to the impact of global warming and climate change resulting from greenhouse gas emissions. …

The geopolymer "glue" is refractory up to 1000°C whereupon it converts to a ceramic, or a ceramic plus glass. ... infrastructure and construction materials. The nanoparticulate nature of geopolymers also provides a low energy, processing route to ultra-refractory ceramic powders or versatile forming methods based on transient, organic ...

The marketable requests for geopolymers' applications: the production of fire-retardant and heat-resistant coatings and sealants, in medicine, in high temperature ceramics, for the encapsulation ...

geopolymers and AAMs. These materials find applications not only in construction but also in diverse fields such as nanomaterials, aerospace, ceramics, and space exploration. Despite these advancements, there is an ongoing need for fundamental research, standardization, and specification improvements for geopolymers and AAMs.

The geopolymer term was initially named and developed by Professor Joseph Davidovits in 1972 [1].Geopolymers are green inorganic polymers comprising …

Characterized by chemical and mechanical properties comparable to those of ceramics, geopolymers present great tolerance for high temperatures and do not explode, contrary to the traditional hydraulic cements. In addition, geopolymers are non-toxic, eco-friendly, and sustainable materials considering, as testified by many papers of …

Geopolymers have been intensively explored over the past several decades and considered as green materials and may be synthesised from natural sources and …

The results of this analysis indicate a significant disparity in the computed financial and sustainability costs associated with geopolymers. Researchers have shown that geopolymers may help mitigate the effects of cement manufacturing on the environment. These geopolymers are predicted to reduce green gas emissions by …

These geopolymers are predicted to reduce green gas emissions by 40–80%. They also show that those advantages can be realized with the best possible feedstock source and the cheapest possible conveyance. ... V.S. Multicriteria Assessment for Calculating the Optimal Content of Calcium-Rich Fly Ash in Metakaolin-Based …

Geopolymers are typically synthesized from potassium or, more commonly, sodium as the alkali cation and are considered precursors to ceramic manufacturing [5,6]. Metakaolin-based geopolymers reacted with sodium activators have a higher viscosity than those reacted with potassium activators . The high viscosity of sodium silicate solutions ...

This study investigates the impact of curing conditions, porosity and shaping techniques on the mechanical properties of metakaolin-based geopolymers. Geopolymers offer versatility in shaping, including 3D , yet the influence of curing conditions after on mechanical properties remains unclear. This is assessed by measuring the …

The ceramic substrate from tungsten mine tailings showed a good performance, and its compression strength reached to 1129.36 MPa. Peng et al. [15] successfully prepared glass ceramics from amorphized tungsten tailings, the results demonstrated the main crystalline phases of the as-prepared glass ceramics were …

[10] J. Davidovits, Geopolymers: ceramic-like inorganic polymers, Journal of Ceramic Science and. Technology. 8 (2017) 335 ...

2. Mix Design and Manufacture Method for Kaolin Geopolymer in Ceramics. A new type of building materials with improved strength, durability, and other qualities entered the market in the nineteenth and twentieth centuries [43,44].Ceramic components can be made from a wide variety of metallic and non-metallic atom combinations, and …

Manuscript Title: Use of foundry sands in the production of ceramic and geopolymers for sustainable construction materials. The authors conducted a study that aims to evaluate the possibility of reusing foundry sands from the production of cast iron as secondary raw material in the production of building materials. The paper is well-written …

Geopolymers are examined from the point of view of reducing energy consumption currently needed for studio ceramics and exploring how geopolymers could be used as part of ceramic production and ...

Currently, there are distinctions in the application of geopolymers and geopolymer ceramics. On one hand, geopolymer exhibit immobilization effects on various types of nuclear waste, while geopolymer ceramics, constrained by their mineral structure, currently show favorable immobilization primarily for Cs +. On the other hand, …

Geopolymers consisting of polymeric Si–O–Al networks are long-range, covalently bonded inorganic materials. In recent years, geopolymers and their composites have attracted considerable attentions in the fields of construction, metallurgy, and hazardous elements immobilization due to their unique properties such as low …

Abstract. Geopolymers are inorganic polymers with 3D framework structures having superior mechanical and physical properties. This new generation of …

Introduction. Geopolymers, as inorganic polymer materials, are also known as alkali-activated materials (AAMs). Geopolymers can take natural materials and …

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This research aimed to optimize the production conditions for geopolymer matrices by investigating the combination of heat curing conditions and the incorporation of recycled ceramic fines (CFs) as a …