The Importance of the Ultra-alkaline Volcanic Nature of the Raw Materials to the Ductility of Roman Marine Concrete [PDF]
arXiv, 2020 Roman-era concrete is the iconic embodiment of long-term physicochemical resilience. We investigated the basis of this behavior across scales of observations by coupling time-lapse (4-D) tomographic imaging of macroscopic mechanical stressing with structural microscopy and chemical spectroscopy on Roman marine concrete (RMC) from ancient harbors in ...
arxiv
Electrically conductive thermal control coatings [PDF]
, 1978 A coating characterized by low thermal absorption, high thermal emittance and high electrical conductivity comprises: (1) a fired oxide pigment comprising a minor amount of aluminum oxide and a major amount of zinc oxide; (2) sufficient water to provide ...
Shai, M. C.
core +1 more source
The Utility of Nanocomposites in Fire Retardancy [PDF]
, 2010 Nanocomposites have been shown to significantly reduce the peak heat release rate, as measured by cone calorimetry, for many polymers but they typically have no effect on the oxygen index or the UL-94 classification. In this review, we will cover what is
He, Xuejun +2 more
core +3 more sources
Development of a Flame Resistant Silicone Rubber [PDF]
Flame resistant silicone rubber using aluminum silicates and aromatic ...
Howarth, J. T. +2 more
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Microwave emission from granular silicates [PDF]
, 1973 Experimental finding is that mass absorption coefficient is independent of frequency but highly dependent on moisture content; effective conductivity increases with frequency, and low tangent is independent of frequency.
Conel, J. E.
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Chemical Equilibrium Abundances in Brown Dwarf and Extrasolar Giant Planet Atmospheres
, 1998 We calculate detailed chemical abundance profiles for a variety of brown dwarf and extrasolar giant planet atmosphere models, focusing in particular on Gliese 229B, and derive the systematics of the changes in the dominant reservoirs of the major ...
Adam Burrows +6 more
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Temperature Fluctuations driven by Magnetorotational Instability in Protoplanetary Disks [PDF]
, 2014 The magnetorotational instability (MRI) drives magnetized turbulence in sufficiently ionized regions of protoplanetary disks, leading to mass accretion. The dissipation of the potential energy associated with this accretion determines the thermal structure of accreting regions.
arxiv +1 more source
Thermodynamic and rheological properties of rhyolite and andesite melts [PDF]
, 1993 The heat capacities of a rhyolite and an andesite glass and liquid have been investigated from relative-enthalpy measurements made between 400 and 1800 K.
Courtial, Philippe +3 more
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Outward Motion of Porous Dust Aggregates by Stellar Radiation Pressure in Protoplanetary Disks [PDF]
, 2014 We study the dust motion at the surface layer of protoplanetary disks. Dust grains in surface layer migrate outward due to angular momentum transport via gas-drag force induced by the stellar radiation pressure. In this study, we calculate mass flux of the outward motion of compact grains and porous dust aggregates by the radiation pressure.
arxiv +1 more source
Low toxic corrosion inhibitors for aluminum in fresh water [PDF]
Combinations of chemical compounds that reportedly reduce the corrosion of aluminum in fresh water were evaluated. These included combinations of borates, nitrates, nitrites, phosphates, silicates, and mercaptobenzothiazole.
Humphries, T. S.
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