Sealing materials effectiveness evaluation in the repair of bituminous-concrete surface with transversal cracks

The method of sealing materials effectiveness evaluation in the repair of bituminous-concrete surface with transversal cracksis offered. Calculation schemes and mathematical models based on the application of the thermo-viscous-elasticity theory forthe prediction of temperature stresses in the sealing material at the contact with the bituminous-concrete surface, taking intoaccount the thermal-technical and thermorheological properties of the materials and the geometric parameters of the bituminous-concreteslabs and the transversal crack. The obtained analytical dependences allow to estimate the service life beforethe loss of sealant compound integrity or adhesive strength of their adhesion with bituminous-concrete surface taking intoaccount annual and daily temperature fluctuations according to the main provisions of the kinetic theory of solid bodiesstrength.

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Evaluation of Antimicrobial Efficacy and Permeability of Various Sealing Materials at the Implant–Abutment Interface—A Pilot In Vitro Study

Materials ◽

10.3390/ma14020385 ◽

2021 ◽

Vol 14 (2) ◽

pp. 385

Author(s):

Igor Smojver ◽

Marko Vuletić ◽

Dražena Gerbl ◽

Ana Budimir ◽

Mato Sušić ◽

...

Keyword(s):

Fungal Infections ◽

Aerobic Condition ◽

In Vitro Study ◽

Vitro Study ◽

Antimicrobial Efficacy ◽

Sealing Material ◽

Implant Abutment ◽

Static Conditions ◽

Sealing Materials

The microenvironment of the oral cavity is altered when an implant, a biocompatible foreign body, is inserted into the mouth. Bacteria settle in the tissues in and around the implant due to the passage of microorganisms through the microgap at the connection of the implant and prosthetic abutment. To prevent colonization of the implant by microorganisms, one idea is to use sealing and antimicrobial materials to decontaminate the implant–abutment interface and close the microgap. The purpose of this study is to evaluate the antimicrobial efficacy and permeability of different types of sealing materials at the implant–abutment interface, under static conditions. Three different sealing material (GapSeal gel, Oxysafe gel and Flow.sil) were used for sealing the implant–abutment interfaces in 60 titanium dental implants, which were first contaminated with a solution containing Staphylococcus aureus and Candida albicans for 14 days under an aerobic condition. Results showed that a complete seal against bacterial infection was not formed at the implant–abutment interface, while for fungal infections, only GapSeal material helped to prevent microleakage. Findings of this in vitro study reported that application of sealing material before abutment connection may reduce peri-implant bacterial and fungal population compared with the interface without sealing material.

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Nonlinear statistics of daily temperature fluctuations reproduced in a laboratory experiment

Physical Review E ◽

10.1103/physreve.76.037301 ◽

2007 ◽

Vol 76 (3) ◽

Cited By ~ 20

Author(s):

Balázs Gyüre ◽

Imre Bartos ◽

Imre M. Jánosi

Keyword(s):

Laboratory Experiment ◽

Temperature Fluctuations ◽

Daily Temperature ◽

Nonlinear Statistics ◽

Daily Temperature Fluctuations

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Moisture-Resistant Sealing Materials for Downhole HPHT Electrical Feedthrough Package

Journal of Microelectronics and Electronic Packaging ◽

10.4071/imaps.942864 ◽

2019 ◽

Vol 16 (3) ◽

pp. 141-148

Author(s):

Hua Xia ◽

Nelson Settles ◽

David DeWire

Keyword(s):

High Temperature ◽

Water Immersion ◽

Electrical Power ◽

Covalent Bond ◽

Phase Structures ◽

Sealing Material ◽

Drilling Tools ◽

Measurement While Drilling ◽

Sealing Materials ◽

Moisture Resistant

Abstract A bismuth oxide–based multicomponent glass system, xH3BO3-yBi2O3-(1-x-y-δ)MO-δ· rare earth oxides (REOs) with MO = TiO2, BaO, ZnO, Fe2O3, etc., and lanthanum series–based REOs, for making downhole high-pressure and high-temperature electrical feedthrough package has been developed using high-temperature melt-quenching and sintering technologies. By properly controlling phase structures in material-manufacturing processes, the obtained sealing materials have shown moisture-resistant properties in their monoclinic and tetragonal mixed phase structures but strongly hydrophobic properties in their covalent bond tetragonal phase. Sealed electrical feedthrough packages have been evaluated under boiling water immersion and 200°C/30,000 PSI water-fluid–simulated downhole harsh environments. The post electrical insulation measurement has demonstrated to be greater than 1.0 × 1014 Ω electrical resistance. This article will show that such a high–bonding strength and high–insulation strength sealing material could be used to seal electrical feed-throughs and connectors for 300°C/30,000 PSI downhole and subsea wireline, logging while drilling, and measurement while drilling tools' signal, data, and electrical power transmissions.

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The Evolution of a Range of Service Experience Rationalised Sealing Materials

Analysis of Bolted Joints ◽

10.1115/pvp2004-2640 ◽

2004 ◽

Author(s):

John R. Hoyes

Keyword(s):

Material Testing ◽

End User ◽

Cost Performance ◽

Service Failures ◽

Testing Tools ◽

Sealing Material ◽

The Relationship ◽

Survival Of The Fittest ◽

Sealing Materials ◽

Structure Test

With the benefit of hindsight some of the initial non-asbestos offerings were doomed to be commercial failures and since then evolution, in the true Darwinian “survival of the fittest” sense, has resulted in the demise of those offerings. In parallel with this process of evolution, the sealing material testing tools that are available have improved. Consequently, the relationship between a material’s contents, its structure, test data and its service potential is far better understood than in previous times. This improved understanding has brought, and will continue to bring, enhanced performance benefits to the end user and increased security against unplanned shut down due to service failures. This paper reviews the evolution process, highlights the classes of materials that have proven to be successful and tries to indicate why, in terms of the properties of the material, they have been successful. The salient features of the content and structure of these materials are also discussed. The paper also speculates about the way in which further consolidation of the range of sealing materials may come about as the process of evolution, driven by cost, performance and environment pressures, continues.

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The Reinforced Concrete Durability and Rebar Erosion Monitoring

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.446-449.3252 ◽

2012 ◽

Vol 446-449 ◽

pp. 3252-3258

Author(s):

Jin Yang Zhang ◽

De Mi Cui ◽

Lie Min Lv ◽

Zhi Yang

Keyword(s):

Reinforced Concrete ◽

Service Life ◽

Protective Layer ◽

Concrete Surface ◽

Monitor System ◽

Concrete Durability ◽

Information Feedback ◽

Starting Time ◽

Cast Concrete

On the basis of the advantages of low construction cost, remarkable dynamics property, easy cast moulding and more controllable construction, the reinforced concrete construct are widely applied in buildings and main structures of constructions in China. However, the reinforced concrete is found more or less aging after many years’ utilization and erosion from the environment, which will lead to a hidden risk to affect its functions. After technical development for decades, the concrete can assure its durability under normal situation, yet the function would be deteriorated due to the erosion from the complex and harsh environment to make it hardly reach its designed service life. With the assist of CorroWatch erosion monitor system, the concrete structures’ erosion can kept watched on to obtain the depassivation development and information feedback of some key data dynamically and in long term so as to foresee precisely the erosion starting time. The newly cast concrete depassivation frontline is located on concrete surface and will tend to go through the protective layer and penetrate towards rebar as time goes on. Its structure service life can be enhanced with the re-designed durability in terms of the mentioned characters and do well the erosion proof measures.

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