Physical degradation of hydrophobized sands

Lin, Hongjie; Lourenço, Sérgio D. N.

doi:10.1016/j.powtec.2020.04.015

Cited by 11 publications

(7 citation statements)

References 20 publications

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“…Tung oil is able to harden after mixing with soils within 7 days due to oxidative polymerization (Lin and Lourenço, 2020;Tang et al, 2010;Tang et al, 2006). To investigate this hardening effect on the compaction behaviour, MCT tests were conducted immediately after mixing with Tung oil (hereinafter fresh stabilized soils) and after 7-day equilibrium (hardened stabilized soils).…”

Section: Modified Compaction Testmentioning

confidence: 99%

Stabilization of an earthen material with Tung oil: compaction, strength and hydrophobic enhancement

Lin

Liu

Lourenço

et al. 2021

Construction and Building Materials

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Section: Modified Compaction Testmentioning

confidence: 99%

Stabilization of an earthen material with Tung oil: compaction, strength and hydrophobic enhancement

Lin

Liu

Lourenço

et al. 2021

Construction and Building Materials

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“…Researchers have used dimethyldichlorosilane (DMDCS) to create hydrophobic samples of sands or glass beads to observe water meniscus shapes [45,12,10,43,34]. DMDCS was therefore selected for this study to allow results to be compared to previous work [see 10].…”

Section: Hydrophobising Agentmentioning

confidence: 99%

“…However, the reduced rainwater infiltration capacity of hydrophobic soils can also result in the improvement of the stability of slopes or landfills and other man-made earthen structures [33,43]. It has also been suggested that artificially induced water repellence in sands is a cost-effective alternative for capillary barrier cover systems [72,56].…”

Section: Introduction and Theoretical Backgroundmentioning

confidence: 99%

Evolution of meniscus structures in hydrophobic granular systems

Karatza

Buckman

Medero

et al. 2021

Journal of Hydrology

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“…The fact that the drop penetrates after a time interval indicates that the soil water repellency can decrease as the material is wet. As contact angle describes the hydrophobicity magnitude, the WDPT describes its persistence [4].…”

Section: Introductionmentioning

confidence: 99%

On the resistance of hydrophobic soil polymer coatings created by cold plasma polymerization

2023

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Hydrophobic soils have natural or artificial origin. In this context, some techniques exist to turn into hydrophobic sand that was originally hydrophilic, as most soils in fact are. Its classical application is impermeabilizing structures where water percolation is not desired. In this paper, a new technique to achieve hydrophobicity is described. It consists of coating particles via cold plasma. The process is known to the industry, but its application in geotechnics is not yet described in literature. The monomers used were octafluorcyclobutane (C4F8) and 1H,1H,2H,2H-perfluoroctylacrilate (PFA-C6). For each monomer, the material was in the coating chamber during two different time spans and a sample was pretreated with oxygen. Different mechanical, thermal and hydraulic conditions were imposed to the samples in order to evaluate the resistance of the coating and its properties. The hydrophobicity was evaluated by means of Water Drop Penetration Time. Results indicate that longer time spans in the cold plasma chamber lead to a more hydrophobic material and that oxygen pretreatment on the sample is irrelevant. It was also observed that mechanical, hydraulic and thermal procedures influence the coating. These observations lead to optimization of the production process and to the understanding of how the material can be applied in the construction industry and what mechanical/hydraulic loads it can be subjected to.

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Physical degradation of hydrophobized sands

Cited by 11 publications

References 20 publications

Stabilization of an earthen material with Tung oil: compaction, strength and hydrophobic enhancement

Stabilization of an earthen material with Tung oil: compaction, strength and hydrophobic enhancement

Evolution of meniscus structures in hydrophobic granular systems

On the resistance of hydrophobic soil polymer coatings created by cold plasma polymerization

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