What is the role of water in the geopolymerization of metakaolin?

Park, Sungwoo; Pour-Ghaz, Mohammad

doi:10.1016/j.conbuildmat.2018.06.073

Cited by 90 publications

(24 citation statements)

References 45 publications

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“…Indeed, the low value for G-3HP (47 m 2 g −1 ) could be explained considering that the slurry was diluted by the addition of H 2 O 2 solution and by the water remaining after the decomposition reaction. When the L/S ratio is high, the geopolymerization reaction is affected accordingly, as a high water content slows down the polymerization with the consequent formation of bigger precipitates that cause a lowering of the specific surface area [10,36]. However, the higher value registered for G-5HP (81 m 2 g −1 ) was not part of this trend, with the L/S being higher than that in G-3HP.…”

Section: Permeability Testmentioning

confidence: 94%

K2O-Metakaolin-Based Geopolymer Foams: Production, Porosity Characterization and Permeability Test

et al. 2022

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In this paper, four near-net shaped foams were produced via direct foaming, starting from a benchmark metakaolin-based geopolymer formulation. Hydrogen peroxide and metallic silicon were used in different amounts as blowing agents to change the porosity from meso- to ultra-macro-porosity. Foams were characterized by bulk densities ranging from 0.34 to 0.66 g cm−3, total porosity from 70% to 84%, accessible porosity from 41% to 52% and specific surface area from 47 to 94 m2 g−1. Gas permeability tests were performed, showing a correlation between the pore features and the processing methods applied. The permeability coefficients k1 (Darcian) and k2 (non-Darcian), calculated applying Forchheimer’s equation, were higher by a few orders of magnitude for the foams made using H2O2 than those made with metallic silicon, highlighting the differing flow resistance according to the interconnected porosity. The gas permeability data indicated that the different geopolymer foams, obtained via direct foaming, performed similarly to other porous materials such as granular beds, fibrous filters and gel-cast foams, indicating the possibility of their use in a broad spectrum of applications.

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Section: Permeability Testmentioning

confidence: 94%

K2O-Metakaolin-Based Geopolymer Foams: Production, Porosity Characterization and Permeability Test

et al. 2022

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“…The role of water in geopolymer was found to be analogous to the well known relationship between compressive strength and water-cement ratio for PC concrete and confirmed by several authors [106,107].…”

Section: Synthesis and Properties Of Geopolymersupporting

confidence: 81%

3D printing of high-volume fly ash mixtures for digital concrete construction

Panda¹

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I would like to express my heartfelt gratitude to my supervisors Associate Professor Ming Jen Tan and Dr. Cise Unluer for their guidance and encouragement throughout the PhD study. I appreciate Prof. Tan for leading the exciting research field of 3D concrete printing and making global impacts. He has always devoted his resources to support my research and provided invaluable guidance, whenever I encountered problems. I will also give my sincere thanks to Dr. Cise for her valuable inputs, continuous guidance and patience all through the research and writing phase. My sincere thanks go to the SC3DP laboratory technicians (Mr. Haer, Mr. Justin, Mr. Daniel) and administration staff (Ms. Suan, Germaine, Ms. Adeline) for their assistance regarding laboratory techniques, equipment and official paperwork.

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“…Water affects the geo-polymerization of metakaolin [45]. Specifically, the stable distribution of metakaolin geopolymer pore size relies on both water to solid ratio (w/s) and the NaOH/metakaolin or (N/M) ratio.…”

Section: Methodsmentioning

confidence: 99%

A Review of Preliminary Experimental Factors of Making Geopolymer Paste as a Passive Fire Protection System

Farida¹,

Surahman²,

Sofwan³

2021

Int. J. Adv. Sci. Eng. Inf. Technol.

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A decrease in the elastic modulus and yield strength due to the creep process is the changes contained in the material that is burning. One strategy to counter this is by using passive fire protection systems. The system is built into the structure to control the fire by using building materials and does not require any special operations in the event of a fire. This study is a review of a new study of passive fire protection systems. This research report contains a review regarding the preliminary study of the manufacture of fireproof new materials from industrial waste that is economical and environmentally friendly. Manufacture of new materials is made to overcome deficiencies in fire-resistant material that exists today. The purpose of this study is to analyze experimental factors, which are influence the making of experimental new fireproof material that is smart and innovative materials for civil engineering. Geopolimerization method that is used in this study comes from the development of brick manufacturing method as one of the fire-resistant material that exists today. The main results of this study are the major factors that influence the making of pasta geopolymer as passive fire protection. The discussion will be related to the elements of determinant manufacture of fire-resistant geopolymer paste. The conclusion is factors that supporting the manufacture of new fire-resistant material with geopolymer method.

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What is the role of water in the geopolymerization of metakaolin?

Cited by 90 publications

References 45 publications

K2O-Metakaolin-Based Geopolymer Foams: Production, Porosity Characterization and Permeability Test

K2O-Metakaolin-Based Geopolymer Foams: Production, Porosity Characterization and Permeability Test

3D printing of high-volume fly ash mixtures for digital concrete construction

A Review of Preliminary Experimental Factors of Making Geopolymer Paste as a Passive Fire Protection System

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