Permeability measurement in composite aerogels: application to nuclear waste storage

Reynes, Jerome; Woignier, Thierry; Phalippou, J.

doi:10.1016/s0022-3093(01)00474-4

Cited by 64 publications

(63 citation statements)

References 5 publications

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“…The alcogels are transformed into aerogels by supercritical evacuation of the solvent. It has previously been shown that the addition of fumed silica such as ÔaerosilÕ in the TEOS solution favors the formation of macropores [11,12]. Fumed silica (aerosil O · 50, Degussa) is added to the hydrolyzed solution of TEOS under vigorous stirring, which is necessitated by the high-viscosity of the medium.…”

Section: Methodsmentioning

confidence: 99%

The use of silica aerogels as host matrices for chemical species

Woignier

Primera

Lamy

et al. 2004

Journal of Non-Crystalline Solids

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Section: Methodsmentioning

confidence: 99%

The use of silica aerogels as host matrices for chemical species

Woignier

Primera

Lamy

et al. 2004

Journal of Non-Crystalline Solids

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“…They are highly porous, open cell, low density, nano-structured materials containing as much as 98% air volume and only 2% of silicon dioxide [1][2][3][4]. Therefore, applications of silica aerogels are potentially vast in number such as nuclear waste storage [5], Cerenkov radiation detectors in high-energy physics [6,7], inertial confinement fusion (ICF) targets for thermonuclear fusion reactions [8] and thermal insulation in * Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

Methyltriethoxysilane: New precursor for synthesizing silica aerogels

Nadargi

Rao

2009

Journal of Alloys and Compounds

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“…Based on Darcy's law and electro kinetic effect which is produced by the pressed electrical double layer on the interface between the solid and the liquid in the concrete pores, Guang YANG [3] determined the similarity conditions and the main similarity coefficient of sample models by dimensional analysis. One can derive a relationship with material permeability from the knowledge of the properties of the porous network [4]. Upul ATTANAYAKA [5] reported that the impregnating process of organosilicon hydrophobic impregnating agents in concrete was agreed with the Darcy's law.…”

Section: Introductionmentioning

confidence: 99%

Study on the Penetrating Property of Silane Hydrophobic Impregnating Agent in Concrete

Sun¹,

Yuan²,

Wang³

et al. 2017

Proceedings of the 2016 International Conference on Architectural Engineering and Civil Engineering

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Abstract-That organosilicon hydrophobic impregnating agents such as silane are coated on the reinforced concrete surface is one of anticorrosion measures of reinforced concrete. The penetrating depth of organosilicon hydrophobic impregnating agents in concrete is an important parameter for the durability of reinforced concrete. There is no nondestructive measure method for measuring the penetrating depth of silane in concrete onsite by now, so it is expected to be obtained based on Darcy's law in this paper. The influence of different cement types and different water cement ratios on the penetrating depth of silane, the contact angle of silane, the concrete porosity and the concrete pore radius of the capillary were studied. The intrinsic permeability coefficients of concrete were researched by using Darcy's law. The surface contact angle on the concrete surface is almost the same with different cement types and different water cement ratios. The concrete total porosity and the pore radius are influenced by cement types and water cement ratios. The most probable pore radius has positive correlation to the penetrating depth of silane and the permeability coefficient of concrete. The permeability coefficient of concrete is not a constant and effected by cement types and water cement ratios, which is positively relation to the water cement ratio. The permeability coefficient of concrete cannot be used as a nondestructive measure method to calculate the penetrating depth of silane. The penetrating process of silane in concrete may not meet Darcy's law. The pore structure of concrete is complicated which is not a simple cylindrical pore. The pore structure of concrete and the pore structure of hardened cement paste are different. There are many factors affecting the pore structure of concrete. The water cement ratio and the aggregate diameter influence the porosity and permeability of concrete.

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Permeability measurement in composite aerogels: application to nuclear waste storage

Cited by 64 publications

References 5 publications

The use of silica aerogels as host matrices for chemical species

The use of silica aerogels as host matrices for chemical species

Methyltriethoxysilane: New precursor for synthesizing silica aerogels

Study on the Penetrating Property of Silane Hydrophobic Impregnating Agent in Concrete

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