Capillary Interaction in Wet Granular Assemblies: Part 2

Wittel, Falk K.; Mani, Roman; Melnikov, Konstantin; Bianchi, Filippo; Herrmann, Hans J.

doi:10.1007/978-3-030-15899-6_9

Cited by 2 publications

(1 citation statement)

References 58 publications

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“…The SEM figures (Figure 5a, b) showed that hydrogel in XBM formed different cellular structures by the different drying processes. We assume that a fresh XBM mixture generates the liquid interparticle' s bridges with the same morphology [17]. Then the air-drying process will shrink hydrogel with water loss, but as outside hardens at first and prevent further shrinking leading to pore's formation within the Xerogel, which is called casehardening [18].…”

Section: Effects Of Curing Conditions: Microstructure Analysismentioning

confidence: 99%

Xerogel-based building material (XBM): potential for construction on Mars base and other resourceless sites

Liu

Qiu

2022

Behavior and Mechanics of Multifunctional Materials XVI

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Mars colonization is coming sooner than we think as transformative development of deep space exploration technologies. Special construction material for building on mars is required to overcome challenges like cold and almost vacuum environments, limited resources, etc. We propose a new composite that uses xerogel to bind sand particles to be used as the building materials for the Mars base. As the xerogel can be made by mixing minor polymer into water (available as ice), the xerogel-based building material (XBM) can maximize the in-situ resource utilization (ISRU). In this study, we demonstrate the feasibility of XBM. First, we developed the XBM prototypes, 1 m 3 of which requires only around 20 kg of Earth-born raw materials. Second, we mechanically tested XBM cubes after curing them under terrestrial environment (room temperature and approximately 1 atm.) or Mars-like environment (-55 °C and 0.00001 atm.), which achieved an average compressive strength of 5.18 MPa and 2.88 MPa respectively; our numerical simulation showed that the mechanical strength would be adequate for sustaining an apartment-size dome under the lower gravity on Mars (1/3 g). Third, we examine the microstructure of XBM, where the xerogel (or aerogel if cured under low temperature and air pressure) between the sand particles is demonstrated as cellular structures; we used discrete element model (DEM) to simulate the compression failure of XBM, which indicates that the mechanical strength of the prototypes may be further enhanced by tailoring the cellular microstructure.

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Section: Effects Of Curing Conditions: Microstructure Analysismentioning

confidence: 99%

Xerogel-based building material (XBM): potential for construction on Mars base and other resourceless sites

Liu

Qiu

2022

Behavior and Mechanics of Multifunctional Materials XVI

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A Review of Sand Aging: Mechanisms and Impacts

Castilla-Barbosa,

Ocampo-Terreros,

Rincón-Arango

2024

Geotech Geol Eng

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Sand aging, defined by time-dependent increases in stiffness and strength over periods ranging from days to months, poses significant challenges in geotechnical engineering and soil science. Despite its relevant implications, the mechanisms driving sand aging remain understood. This review systematically examines sand aging, emphasizing the classification of chemical and mechanical processes involved. Key advancements in chemical aging understanding, particularly the influence of surface chemistry and electrokinetic forces, are discussed. Additionally, the review underscores the critical role of micromechanical modeling, especially discrete element methods, in elucidating particle interactions and aging phenomena. The review also identifies essential directions for future research, notably incorporating particle shape and surface texture into aging models. Hence, this comprehensive resource aims to enhance the understanding of sand aging.

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Capillary Interaction in Wet Granular Assemblies: Part 2

Cited by 2 publications

References 58 publications

Xerogel-based building material (XBM): potential for construction on Mars base and other resourceless sites

Xerogel-based building material (XBM): potential for construction on Mars base and other resourceless sites

A Review of Sand Aging: Mechanisms and Impacts

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