A comprehensive review of synthesis kinetics and formation mechanism of geopolymers

Siyal, Ahmer Ali; Radin Mohamed, Radin Maya Saphira; Shamsuddin, Rashid; Ridzuan, Mohd Baharudin

doi:10.1039/d3ra06205h

Cited by 16 publications

(2 citation statements)

References 144 publications

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“…A higher pH value of the alkaline activation solution favors the solubility of the precursors. Geopolymerization is favored by the reactivity of the alkaline solution [48][49][50]. The low-heat Portland cement has a lower shrinkage than medium-heat Portland cement and ordinary Portland cement, due to the degree of hydration owned to alkali sulfates.…”

Section: Alkaline Activatorsmentioning

confidence: 99%

The Precursors Used for Developing Geopolymer Composites for Circular Economy—A Review

Furtos,

Prodan,

Sarosi

et al. 2024

Materials

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Considering recent climate changes, special importance is given to any attempt to depollute and protect the environment. A circular economy seems to be the ideal solution for the valorization of mineral waste, resulting from various industrial branches, by reintroducing them in the process of obtaining alternative building materials, more friendly to the environment. Geopolymers can be considered as a promising option compared to Portland cement. Information about the influence of the composition of the precursors, the influence of the activation system on the mechanical properties or the setting time could lead to the anticipation of new formulations of geopolymers or to the improvement of some of their properties. Reinforcement components, different polymers and expansion agents can positively or negatively influence the properties of geopolymers in the short or long term.

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Section: Alkaline Activatorsmentioning

confidence: 99%

The Precursors Used for Developing Geopolymer Composites for Circular Economy—A Review

Furtos,

Prodan,

Sarosi

et al. 2024

Materials

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“…“geopolymer” refers to amorphous aluminosilicate networks of Na + or K + [ 15 ], formed through alkaline activation, known as synthesis or polymerization. The reactive materials have a chemical composition rich in silica and alumina and contain high amounts of highly energetic solid phases, such as fly ash, steel slag, and rice husk ash [ 16 ]. Notably, the raw materials used to produce geopolymers are characterized by shallow calcium content.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Concrete Durability and Strength with Fly Ash, Steel Slag, and Rice Husk Ash for Marine Environments

Barragán-Ramírez,

González-Hernández,

Bautista-Ruiz

et al. 2024

Materials

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The effect of an alternative source of silica, based on class F fly ash mixed with blast furnace slag and activated by rice husk ash (RHA), to produce concrete exposed to marine environments was evaluated. Four mixtures activated by the combination of 85% NaOH 14M + 15% RHA were manufactured to achieve a liquid/solid ratio of 0.20. Fly ash was incorporated into the steel slag mixture at addition percentages of 20, 40, 60, and 80%, and evaluated at 28, 900, and 1800 days for pore and chloride ion absorption. In general, including rice husk ash in the mixture of fly ash and steel slag significantly affected mechanical performance because it was possible to obtain concrete with high mechanical resistance. Concerning the durability evaluation, the effect of the activator generated by rice husk ash was observed, and the increase in steel slag added to the cementitious samples improved the capacity of the material to resist the penetration and diffusion of chloride ions.

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Effect of Synthesis Parameters on Fresh and Hardened Properties of Slag-Waste Glass Binary Geopolymer

Varma,

Singh

2024

Arab J Sci Eng

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A comprehensive review of synthesis kinetics and formation mechanism of geopolymers

Abstract: This paper reviews synthesis kinetics and formation mechanism of geopolymers. The literature studies provided new information, and development of advanced techniques is required to study synthesis kinetics and formation mechanisms further.

Cited by 16 publications

References 144 publications

The Precursors Used for Developing Geopolymer Composites for Circular Economy—A Review

The Precursors Used for Developing Geopolymer Composites for Circular Economy—A Review

Enhancing Concrete Durability and Strength with Fly Ash, Steel Slag, and Rice Husk Ash for Marine Environments

Effect of Synthesis Parameters on Fresh and Hardened Properties of Slag-Waste Glass Binary Geopolymer

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