Abstract The needle penetration index (NPI) test is a non-destructive that applicable both in the field and laboratory, does not require any special sample preparation. This has been used for estimation of physico-mechanical properties soft rocks. In this study, influence clay content on relation between uniaxial compressive strength (UCS) NPI investigated some clay-bearing tests were carried o...

Many termite species use clay to build foraging galleries and mound-nests. In some cases clay is placed within excavations of their wooden food, such as living trees or timber in buildings; however the purpose for this clay is unclear. We tested the hypotheses that termites can identify load bearing wood, and that they use clay to provide mechanical support of the load and thus allow them to ea...

[1] The role of phyllosilicate fabrics in fault gouge is a poorly understood component of the mechanical and hydrologic behavior of brittle fault zones. We present 90 fabric intensity measurements using X-ray texture goniometry on 22 natural clay-rich fault gouges from low-angle detachment faults (Death Valley area detachments, California; Ruby Mountains, Nevada; West Salton Detachment Fault, C...

Soil is a material consisting of mineral grains bonded to one another. itself has various types. One them clay. Clay soil microscopic particles that come from weathering rocks. The water content in clay tends be high so it low bearing capacity. In addition, also shrinkage. Therefore, the management soils must handled properly. method used Gradation Sieve, Liquid Limit, and Plastic Limit. These ...

Cement-based materials are the most widely used construction on planet. play a fundamental role in modern civilization and will for foreseeable future. Although great efforts have been devoted to discovering behaviors optimizing their performances, several long-standing controversies persist water-related properties of cement-based materials, which hinder theoretical researches mislead technolo...

Interfacial electron transfer has been shown to occur between sorbed Fe(II) and structural Fe(III) in Fe oxides, but it is unknown whether a similar reaction occurs between sorbed Fe(II) and Fe(III)-bearing clay minerals. Here, we used the isotopic specificity of (57)Fe Mössbauer spectroscopy to demonstrate electron transfer between sorbed Fe(II) and structural Fe(III) in an Fe-bearing smectite...

Clays are understood to form the majority of fluid-flow barriers in faulted reservoirs and numerous fault gouge seal studies have quantified volumes smeared abraded clays create along surfaces. However, clay-related permeability adjacent surface, including damage zone, has largely been neglected. Previous shown morphology distribution unfaulted authigenic clays, not just clay volume, exert a si...

Introduction: In the search for life on Mars nearsurface soil environments may be important habitats for life accessible to future missions. Serpentinite rocks have been documented on Mars [1], as well as other clay minerals including smectite and kaolinites [2, 3]. Previous studies of soils formed on serpentinites on Earth have documented the formation of extensive clays, including smectite [4...

Metapelitic rocks in the Gasht area include micaschist, kyanite schist, andalusite schist, garnet schist, staurolite schist, cordierite schist and sillimanite schist. Tourmaline occurs as accessory mineral in all of these rock types. These schists are metamorphosed regionally and are affected by contact metamorpism subsequently. Based on the textural relations and the fact that CaO and TiO2 con...