Synthesis of sustainable one-part geopolymers for well cementing applications

Omran, Mohamed; Hjelm, Sondre; Khalifeh, Mahmoud; Salehi, Saeed

doi:10.1016/j.geoen.2023.211822

Cited by 9 publications

(1 citation statement)

References 27 publications

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“…There is currently a drive in the research community to find alternative well cementing materials as well, with geopolymers having been suggested as potential candidates [11][12][13]. Several different types of precursor materials have been used to prepare geopolymer well cements, such as fly ash [14][15][16][17][18][19], rock waste [20][21][22], and volcanic ash [23].…”

Section: Introductionmentioning

confidence: 99%

Strength Development of Metakaolin-Based Alkali-Activated Cement

Lou,

Vrålstad

2023

Applied Sciences

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Alkali-activated materials, sometimes called geopolymers, can be used as alternative cementitious materials to conventional Portland cement. Currently, there is a significant interest in these materials due to their low CO2 footprint. The typical applications of alkali-activated materials are within civil engineering; however, potential applications as well cementing material within the oil and gas industry are also receiving emerging interest. This paper presents a systematic study of the compressive strength development from 1 to 28 days for metakaolin-based alkali-activated cement. The results show that the compressive strength is highly dependent upon the initial Si/Al ratio in the mix design, as well as the concentration of the activator solution. Furthermore, due to the relatively low initial reactivity of the metakaolin material used, different types of co-binders were included in the slurry composition to improve early strength development. The two different co-binders tested were another, more reactive metakaolin material and Blast Furnace Slag (GGBFS). It was found that both these co-binders performed as intended, by ensuring early strength development via precipitation of K-A-S-H and C-A-S-H gels, respectively, and also by enabling subsequent strength development due to improved dissolution of the low-reactive metakaolin.

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Section: Introductionmentioning

confidence: 99%

Strength Development of Metakaolin-Based Alkali-Activated Cement

Lou,

Vrålstad

2023

Applied Sciences

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Multiscale insights into mechanical performance of a granite-based geopolymer: Unveiling the micro to macro behavior

Hajiabadi,

Khalifeh,

van Noort

2023

Geoenergy Science and Engineering

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Preparation of granite powder–based geopolymer by synergistic action of calcination and phosphoric acid

Jia,

Huang,

Huang

et al. 2023

J Am Ceram Soc.

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Using the solid waste of granite powder (GP) to prepare green cementitious materials is of great significance for the sustainable development of the construction industry. In this study, a phosphoric acid–based geopolymer (PABG) was directly prepared from GP through a combination of phosphoric acid and calcination processes. Reaction mechanism of phosphoric‐activated GP is studied by techniques of X‐ray diffraction, thermal analysis, Fourier transform infrared spectroscopy, SE mode, and mercury intrusion porosimetry (MIP) taking calcination temperature, calcination time, and phosphoric acid as variables. The results indicated that the addition of 15 wt.% phosphoric acid and calcination at the temperature of 200°C for 90 min significantly increased compressive strength from 0.70 to 20.92 MPa. The calcination temperature was the most important factor in the synthesis of PABG using GP. The decrease of the peak value of mineral phase after calcination indicates that high temperature promotes the reaction between phosphoric acid and GP. According to the results of MIP, the gel generated by the reaction of phosphoric acid and GP refines the pore structure, which is conducive to the improvement of geopolymer properties. These research results provide a reference for the preparation of geopolymers directly using low pozzolanic active GP.

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Synthesis of sustainable one-part geopolymers for well cementing applications

Cited by 9 publications

References 27 publications

Strength Development of Metakaolin-Based Alkali-Activated Cement

Strength Development of Metakaolin-Based Alkali-Activated Cement

Multiscale insights into mechanical performance of a granite-based geopolymer: Unveiling the micro to macro behavior

Preparation of granite powder–based geopolymer by synergistic action of calcination and phosphoric acid

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