16 Result(s)
within
Sérgio D. N. Lourenço
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Article
Open AccessControllable hydrophobization of sands with self-healing polymeric microcapsules
Hydrophobized soils have functional hydrophobic coatings to delay or restrict water infiltration and thus prevent infrastructure failure and long-term degradation. Over time, hydrophobized soils will be subjec...
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Article
Open AccessShear strength recovery of sand with self-healing polymeric capsules
Self-healing approaches are increasingly being explored in various fields as a potential method to recover damaged material properties. By self-recovering without external intervention, self-healing techniques...
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Article
An exploration on the degradation of hydrophobized sands as a subgrade impervious barrier during one-year outdoor weathering
Water drives the decay of road subgrades such as frost heave in cold areas and collapse in saline soil areas, which influences the safety and comfort of vehicle transportation. This paper proposes a novel geot...
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Article
Temporal variations of surface roughness and thickness of polymer-coated quartz sand
In this work, the changes in surface roughness and thickness of particles have been investigated after coating with polymers that result in hydrophobicity after a given time period. The study fundamentally inv...
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Chapter and Conference Paper
Hydrophobicity Assessment of Sands Treated with Tung Oil
Hydrophobic (or water repellent) soils have been reported worldwide. Soil hydrophobicity shows significant effects on water infiltration, water movement, evaporation, and soil strength. The unique properties o...
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Chapter and Conference Paper
Effect of Tung Oil on Mechanical Behavior of Silica Sand
Cemented sands have great potential as construction materials compared with clean sand due to the higher strength, but they have insignificant environmental benefits such as high embodied energy and carbon foo...
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Article
Accelerated weathering of hydrophobized sands
Hydrophobized sands have been suggested as materials for hydraulic barriers in infrastructure. When placed at the interface ground–atmosphere, environmental factors such as temperature and rainfall are expecte...
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Article
Stress-dilatancy behaviour of a polymer-coated sand
Natural sands can be coated by substances of various origins, from natural to anthropogenic substances (from contamination or synthesized). Therefore, predicting the mechanical behaviour of coated sands is of ...
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Chapter
Hydrophobized Granular Materials for Ground Infrastructure
Functionalizing granular materials to render them hydrophobic allows their use in ground infrastructure to delay or restrict water infiltration and thus prevent their failure and long-term degradation. These m...
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Article
Factors affecting the soil–water retention curve of Chinese loess
Loess is unsaturated soil that occurs in various locations on the surface of the Earth, and it is most widespread in the Chinese Loess Plateau where it has caused many geotechnical problems and geohazards. To ...
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Article
Quantification of the surface roughness of quartz sand using optical interferometry
In comparison to the description of particle size and shape, the surface roughness, which mainly affects the inter-particle friction, is more difficult to measure and quantify. One difficulty arises from the v...
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Chapter and Conference Paper
Droplet Interaction with Hydrophobic Granular Materials: An Insight with the Lattice Boltzmann Method
Water repellent soils, or hydrophobic soils, are described as having delayed wetting of the soil surface and reduced amount of water infiltration, which has been proposed as alternative slope cover materials....
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Chapter and Conference Paper
Synthetic Water Repellent Soils for Slope Stabilization
Water repellent soils, or non-wettable soils, are described as having delayed wetting of the soil surface and water infiltration, and have been studied by soil scientists...
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Article
Wettability decay in an oil-contaminated waste-mineral mixture with dry-wet cycles
The dependency of soil particle wettability on soil water content implies that soils subjected to drying-wetting cycles become wettable with wetting and water repellent with drying. While this has been demonst...
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Chapter and Conference Paper
Wettability Assessment of an Oil Coated Soil
Soil wettability depends on the nature of the grain’s surface, existence of hydrophobic substances and can vary both spatially and temporarily. Low wettability conditions occur in both the natural and the buil...
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Article
Aspects of sand behaviour by modified constant shear drained tests
Constant shear drained tests (CSD) are probably the most suitable to simulate the strength and deformation behaviour of soils in slopes under water infiltration conditions or lateral stress relief. This is sig...
