A comparative study of porous geopolymers synthesized by pre-foaming and H2O2 foaming methods: Strength and pore structure characteristics

Yan, Dongming; Shi, Yangpiaoxue; Zhang, Yajun; Wang, Wenxin; Qian, Hao; Chen, Shikun; Liu, Yi; Ruan, Shengqian

doi:10.1016/j.ceramint.2024.02.270

Cited by 3 publications

(1 citation statement)

References 51 publications

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“…Considering the possibility of using industrial waste to produce the material, the mechanical properties comparable to cementitious materials and the high resistance of the geopolymer matrix to fire and high temperatures, geopolymers show great potential for this application [ 9 ]. In recent years, there has been a significant research focus on geopolymer foams characterized by tailor-made pore architectures [ 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Foaming and Physico-Mechanical Properties of Geopolymer Pastes Manufactured from Post-Metallurgical Recycled Slag

Sitarz,

Zdeb,

Mróz

et al. 2024

Materials

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This paper presents a research program aimed towards developing a method of producing lightweight, porous geopolymer composites for the construction industry based on industrial wastes. A direct method involving the addition of chemicals is currently most commonly used to produce the porous mineral structure of a geopolymer matrix. This relies on a reaction in a highly alkaline environment of the geopolymer to produce a gas (usually hydrogen or oxygen) that forms vesicles and creates a network of pores. This paper demonstrates the feasibility of producing a slag-based geopolymer paste foamed with aluminum powder, taking into account different parameters of fresh paste production: the mixing duration, its speed and the timing of foaming agent addition. The foaming process of the fresh paste in terms of the volumetric changes and temperature development of the fresh paste during the curing of the material are observed. After hardening, the physical properties (density and porosity) as well as the mechanical parameters (compressive strength and work of damage) are determined for the nine manufactured foamed pastes. Image analysis software was used to assess the porosity distribution of the material across the cross-section of the samples. The results enabled the design of the mixing procedure to be adopted during the manufacture of such composites.

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Section: Introductionmentioning

confidence: 99%

Foaming and Physico-Mechanical Properties of Geopolymer Pastes Manufactured from Post-Metallurgical Recycled Slag

Sitarz,

Zdeb,

Mróz

et al. 2024

Materials

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Study on the blast mitigation behavior of metakaolin-based foam geopolymer (MKFG) as tunnel cushioning layer against external blasts

Wang,

Xiao,

Zhou

et al. 2025

Thin-Walled Structures

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Facile preparation and properties of foamed fly‐ash/slag‐based hollow glass microspheres/geopolymer composites

Yan,

He,

Zhang

et al. 2024

Int J Applied Ceramic Tech

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In order to reuse the multiple solid waste and improve the porosity of geopolymer composites, a unique foaming process was developed to fabricate novel green foamed fly‐ash/slag‐based hollow glass microspheres/geopolymer (HGMs/FSGP) composites. A thorough investigation was carried out on the synergic effects of cetyltrimethylammonium bromide (CTAB), hydrogen peroxide (H2O2) and HGMs on the microstructure, strength and thermal conductivity. Results showed that the foamed HGMs/FSGP composites with the amorphous structure could be fabricated by foaming combined with HGMs at room temperature. The density of the samples changed from 1.16 to 0.47 g/cm3 with 1–5 wt.% H2O2. The acceptable compressive strength (0.71–15.05 MPa) of the HGMs/FSGP composites was attributed to the fractured HGMs, the good bond between HGMs and geopolymer matrix, and crack deflection across the HGMs. With proper H2O2 and HGMs, the composites obtained their lowest thermal conductivity of 0.116 W/(m⋅K), which could find use in insulation fields.

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A comparative study of porous geopolymers synthesized by pre-foaming and H2O2 foaming methods: Strength and pore structure characteristics

Cited by 3 publications

References 51 publications

Foaming and Physico-Mechanical Properties of Geopolymer Pastes Manufactured from Post-Metallurgical Recycled Slag

Foaming and Physico-Mechanical Properties of Geopolymer Pastes Manufactured from Post-Metallurgical Recycled Slag

Study on the blast mitigation behavior of metakaolin-based foam geopolymer (MKFG) as tunnel cushioning layer against external blasts

Facile preparation and properties of foamed fly‐ash/slag‐based hollow glass microspheres/geopolymer composites

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