A Study on Chemical Foaming Geopolymer Building Materials

Yang, Tsung Yin; Chien, Chuan Chi

doi:10.4028/www.scientific.net/amr.853.202

Cited by 6 publications

(5 citation statements)

References 6 publications

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“…If the pore size distribution is efficiently controlled, the mechanical properties of the foamed geopolymers can be improved [24].…”

Section: Introductionmentioning

confidence: 99%

“…e main challenge on inorganic insulation materials' development is related to the production of a high porous material with sufficient mechanical properties. Geopolymer foams can be produced by the introduction of foaming agents such as hydrogen peroxide [18][19][20][21], metal powders [22][23][24], or silica fumes [25][26][27]. eir foaming action is due to the oxygen or hydrogen formation in alkaline conditions according to the following reactions:…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Porous Fly Ash‐Based Geopolymers Using Si as Foaming Agent

Kioupis

Kavakakis

Tsivilis

et al. 2018

Advances in Materials Science and Engineering

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is paper concerns the synthesis of foamed geopolymers using fly ash and metallic Si as the binder and the porogent agent, respectively. e Taguchi approach was applied in order to study the effect of some significant synthesis parameters such as the Si foaming agent content (% w/w fly ash based), the alkali type (R : Na or K), and the alkalinity (R/Al molar ratio) of the activation solution on the compressive strength and apparent density of the foamed geopolymers. e final products were characterized by means of XRD, FTIR, and SEM, while optical microscopy was applied for the evaluation of the porosity. Lightweight geopolymers with a compressive strength of 2.08-14.88 ΜPa and an apparent density of 0.84-1.55 g/cm 3 were prepared by introducing a Si content up to 0.2% w/w on fly ash basis.

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“…If the pore size distribution is efficiently controlled, the mechanical properties of the foamed geopolymers can be improved [24].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Porous Fly Ash‐Based Geopolymers Using Si as Foaming Agent

Kioupis

Kavakakis

Tsivilis

et al. 2018

Advances in Materials Science and Engineering

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“…Generally, the binders have a more or less homogeneous microstructure with a slight difference in particle connectivity within the matrix. In the case of GABD samples, a structure scattered with whitish particles can be observed, which some authors have attributed to the residual phase linked to either the liquid precursor or additives [26] [27] [28] [29].…”

Section: Microstructural Properties Of Geopolymer Bindersmentioning

confidence: 99%

“…tion and development of mechanical performances (Figure4(B)), as predicted by some authors[24] [25]. The specimens in the GABD series have the best mechanical performances, ranging from 14.43 to 31.37 MPa, while those in the GARD series range from 6.18 to 11.56 MPa.In summary, the amorphous phase content and thermal transformation of muscovite as a fluxing mineral have played a significantly favorable role in the development of mechanical strengths, as demonstrated by the works of Yang et al[26].…”

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confidence: 94%

Formulation of Geopolymer Cements from Two Clays Containing Kaolinite and Muscovite: Effect of Temperature on the Physicomechanical Properties of the Products

Balde,

Sidibe,

Bakam

et al. 2023

MSCE

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The paper talks about the elaboration of geopolymer with two types of kaolinite clays containing muscovite. The kaolinite materials were first calcined at different temperatures, and mixed with an activator solution, called liquid precursor, at a different solid/liquid mass ratio depending on their normal consistency to produce geopolymer binders. Results show that the geopolymer products obtained from the different clays have good physichomechanical properties: their open porosity and their water absorption rate decrease while their compressive strength and their apparent density increase with the increase in calcination temperature of the clays. The density of GABD binders varies between 2.92 and 2.47 g/cm 3 and that of GARD binders between 1.86 and 2.16 g/cm 3 . Specimens in the GABD series have the best mechanical performance, ranging from 14.43 to 31.37 MPa, while those in the GARD series oscillate between 6.18 and 11.56 MPa. These properties make kaolinite materials from this region suitable for use as construction materials for adequate waterproof structures.

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“…i-The reaction between the chemical foaming agent with an alkaline activator such as Si, Zn, and Al powders [9,[23][24][25]. ii-Decomposition of some chemical foaming agents such as hydrogen peroxide [26][27][28], sodium perborate [19,29], and sodium hypochlorite.…”

Section: Introductionmentioning

confidence: 99%

Physico-chemical and Mechanical Properties of Eco-friendly Ultra-lightweight Geopolymers Containing Silica Sand Fluor and Calcium Carbonate

Abbas

Soltan

Khater

et al. 2023

The Bulletin Tabbin Institute for Metallurgical Studies (TIMS)

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Low-cost lightweight geopolymer mortars based on ground granulated blast furnace slag, calcium carbonate, and silica sand flour were investigated as lightweight building materials. The effect of two chemical foaming agents such as hydrogen peroxide (H 2 O 2 ) and sodium perborate tetrahydrate (NaBO 3 .4H 2 O) on bulk density, porosity, and compressive strength was studied. FTIR, XRD, XRF, and SEM were used to investigate the raw materials and selected samples of prepared lightweight geopolymers. The use of grinding calcium carbonate and silica sand flour enhanced the compressive strength, workability, and homogeneity of the geopolymer.The lightweight geopolymer has given about 3.30 -17.60 and 1.70 -6 MPa of compressive strengths at 28 days of curing with bulk densities from 584 to 1340 kg/m 3 and 745 to 1770 kg/m 3 in the case of H 2 O 2 and NaBO 3 .4H 2 O, respectively. The images of morphology and microstructure results indicate that the porosity and pore size increase with the increase of the foaming agent due to the release of oxygen gas upon its decomposition. According to the results of bulk density MC-H1, MC-H1.25, and MC-B2.5 mixes can be considered ultra-lightweight geopolymers with proper compressive strength. The results show that hydrogen peroxide mixes have better performance in the physico-chemical and mechanical properties than sodium perborate mixes.

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A Study on Chemical Foaming Geopolymer Building Materials

Cited by 6 publications

References 6 publications

Synthesis and Characterization of Porous Fly Ash‐Based Geopolymers Using Si as Foaming Agent

Synthesis and Characterization of Porous Fly Ash‐Based Geopolymers Using Si as Foaming Agent

Formulation of Geopolymer Cements from Two Clays Containing Kaolinite and Muscovite: Effect of Temperature on the Physicomechanical Properties of the Products

Physico-chemical and Mechanical Properties of Eco-friendly Ultra-lightweight Geopolymers Containing Silica Sand Fluor and Calcium Carbonate

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