A novel expansive soil hardener: performance and mechanism of immersion stability

Mei, Tao; Lan, Jirong; Dong, Yiqie; Zhang, Shanshan; Tao, Huiting; Hou, Haobo

doi:10.1039/d2ra01185a

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…At the same time, it can combine montmorillonite through electrostatic adsorption, hydrogen bonding, anchoring and hydrophobic interaction, and effectively inhibit the hydration, swelling and dispersion of montmorillonite. Secondly, the adsorption between the dissociated primary amine group of EGP-2 and the crystalline layer of active montmorillonite pulls together the upper and lower crystalline layers of montmorillonite [43,44] to prevent the swelling of the crystalline layer caused by hydration, so as to obtain strong shale inhibition performance.…”

Section: Mechanismmentioning

confidence: 99%

Preparation and Application of New Polyhydroxy Ammonium Shale Hydration Inhibitor

Chang,

Wang,

et al. 2023

Processes

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Wellbore instability caused by the hydration of shale formations during drilling is a major problem in drilling engineering. In this paper, the shale inhibition performance of polyhydroxy-alkanolamine was evaluated using an anti-swelling test, linear swelling test, wash-durable test and montmorillonite hydration and dispersion experiment. Additionally, the shale inhibition mechanism of polyhydroxy-alkanolamine was studied via Fourier transform infrared spectroscopy (FTIR), particle size, zeta potential, thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The results show that the use of polyhydroxy-alkanolamine (EGP-2) could result in a relatively lower linear swelling rate of montmorillonite, and the linear swelling rate of 0.3% EGP-2 is 26.98%, which is stronger than that of 4% KCl. The anti-swelling rate of 0.3% EGP-2 is 43.54%, and the shrinkage–swelling rate of 0.3% EGP-2 is 34.62%. The study on the inhibition mechanism revealed that EGP-2 can permeate and adsorb on the surface of montmorillonite. The rolling recovery rate of easily hydrated shale was as high as 79.36%, which greatly reduces the dispersion ability of water to easily hydrated shale. The results of this study can be used to maintain the stability of a wellbore, which is conducive to related research.

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Section: Mechanismmentioning

confidence: 99%

Preparation and Application of New Polyhydroxy Ammonium Shale Hydration Inhibitor

Chang,

Wang,

et al. 2023

Processes

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Water retention property and microscopic mechanism of shallow soil in inner dump improved by fly ash and polyacrylamide

Wang,

Zhang

et al. 2024

Environ Monit Assess

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A novel expansive soil hardener: performance and mechanism of immersion stability

Abstract: Aiming at the existing problems of poor treatment effect and immersion stability of expansive soils, a slag soil hardener (SSH, developed by Wuhan University, China) was combined with different additives to dispose in this study.

Cited by 2 publications

References 27 publications

Preparation and Application of New Polyhydroxy Ammonium Shale Hydration Inhibitor

Preparation and Application of New Polyhydroxy Ammonium Shale Hydration Inhibitor

Water retention property and microscopic mechanism of shallow soil in inner dump improved by fly ash and polyacrylamide

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