Rivista e Edizione

Volume 66 (2022): Edizione 1 (January 2022)

Volume 65 (2021): Edizione 4 (December 2021)

Volume 65 (2021): Edizione 3 (November 2021)

Volume 65 (2021): Edizione 2 (September 2021)

Volume 65 (2021): Edizione 1 (May 2021)

Volume 64 (2020): Edizione 4 (December 2020)

Volume 64 (2020): Edizione 3 (October 2020)

Volume 64 (2020): Edizione 2 (June 2020)

Volume 64 (2020): Edizione 1 (March 2020)

Volume 63 (2019): Edizione 4 (December 2019)

Volume 63 (2019): Edizione 3 (November 2019)

Volume 63 (2019): Edizione 2 (June 2019)

Volume 63 (2019): Edizione 1 (March 2019)

Volume 62 (2018): Edizione 4 (December 2018)

Volume 62 (2018): Edizione 3 (July 2018)

Volume 62 (2018): Edizione 2 (May 2018)

Volume 62 (2018): Edizione 1 (February 2018)

Volume 61 (2017): Edizione 5 (December 2017)

Volume 61 (2017): Edizione 4 (October 2017)

Volume 61 (2017): Edizione 3 (July 2017)

Volume 61 (2017): Edizione 2 (April 2017)

Volume 61 (2017): Edizione 1 (March 2017)

Volume 60 (2016): Edizione 5 (December 2016)

Volume 60 (2016): Edizione 4 (December 2016)

Volume 60 (2016): Edizione 3 (September 2016)

Volume 60 (2016): Edizione 2 (June 2016)

Volume 60 (2016): Edizione 1 (March 2016)

Volume 59 (2015): Edizione 4 (December 2015)

Volume 59 (2015): Edizione 3 (November 2015)

Volume 59 (2015): Edizione 2 (July 2015)

Volume 59 (2015): Edizione 1 (April 2015)

Volume 58 (2014): Edizione 4 (December 2014)

Volume 58 (2014): Edizione 3 (November 2014)

Volume 58 (2014): Edizione 2 (June 2014)

Volume 58 (2014): Edizione 1 (March 2014)

Volume 57 (2013): Edizione 4 (December 2013)

Volume 57 (2013): Edizione 3 (September 2013)

Volume 57 (2013): Edizione 2 (June 2013)

Volume 57 (2013): Edizione 1 (March 2013)

Volume 56 (2012): Edizione 4 (December 2012)

Volume 56 (2012): Edizione 3 (October 2012)

Volume 56 (2012): Edizione 2 (July 2012)

Volume 56 (2012): Edizione 1 (March 2012)

Dettagli della rivista
Formato
Rivista
eISSN
1804-1213
Pubblicato per la prima volta
03 Apr 2012
Periodo di pubblicazione
4 volte all'anno
Lingue
Inglese

Cerca

Volume 65 (2021): Edizione 3 (November 2021)

Dettagli della rivista
Formato
Rivista
eISSN
1804-1213
Pubblicato per la prima volta
03 Apr 2012
Periodo di pubblicazione
4 volte all'anno
Lingue
Inglese

Cerca

4 Articoli
Accesso libero

Influence of conversion coatings on the resistance of adhesive joints to undercorrosion

Pubblicato online: 30 Dec 2021
Pagine: 70 - 78

Astratto

Abstract

The paper deals with the application of conversion coatings for the preparation of surfaces before adhesive bonding of galvanized and non-galvanized steels. The morphology of the coatings was monitored by electron microscopy. The corrosion characteristics of the conversion coatings were determined by linear polarization. Steels treated with conversion coatings were used to form bonded joints using three structural adhesives. The resistance of the joints to undercorrosion was determined following the change in the load-bearing capacity of the joints after exposure in the climatic chamber.

Accesso libero

Mitigation of chloride induced corrosion in reinforced concrete structures and its modeling

Pubblicato online: 30 Dec 2021
Pagine: 79 - 85

Astratto

Abstract

The paper is primarily focused on the description of transport of harmful species in concrete such as chlorides on one side and transport of corrosion inhibitors and nanoparticles used to diminish corrosion of steel reinforcement or seal the microstructure of concrete on the other side. The studied processes are helpful in reverting the chloride induced corrosion of the reinforcement in reinforced concrete structures. The transport mechanisms are summarized with the emphasis on their mathematical description and numerical solution. The paper shows modeling results of the processes including a comparison with experimental data on several typical examples. The efficiency of the methods is shown supported by experimental and numerical results. A good correlation of the models with experiments is achieved.

Accesso libero

Monitoring of the atmospheric corrosivity by resistive sensors

Pubblicato online: 30 Dec 2021
Pagine: 86 - 91

Astratto

Abstract

Atmospheric corrosivity is classified according to EN ISO 9223 Corrosion of metals and alloys – Corrosivity of atmospheres – Classification, determination and estimation. For the determination and estimation of the corrosivity category, standardized approaches are used. Monitoring of corrosivity with the application of various sensors is an actual trend. The paper gives results of verification of some types of sensors for this monitoring with standardized flat samples at atmospheric test sites in the Czech Republic. The trend of decreasing atmospheric corrosivity is evident in the last decade. Monitoring of the corrosion rate and mapping of the corrosivity become a very important step in preventing failures in long-term atmospheric exposition. This type of monitoring was used on bridge construction to estimate the seasonal effect of de-icing salts deposition, too.

Accesso libero

Anchorage length of patented wire cables in prestressed bridge girders

Pubblicato online: 30 Dec 2021
Pagine: 92 - 96

Astratto

Abstract

This paper briefly describes the methodology, performance and the obtained results of unique experiments performed on original I-73 precast bridge girders. The main objective of the experiments was to determine the actual anchorage length of corroded-through fully grouted prestressing reinforcement (prestressing wires), which is important for determination of the residual load-bearing capacity of prestressed structures. Observation probes leading all the way to the prestressing wires were drilled on selected sections of the girders along the length of the prestressing reinforcement. Optical image acquisition devices were then installed at these probes. Subsequently, controlled breakage of the patented wires (corrosion failure simulation) and observation of the changes that occurred in the prestressing wires after relief of stress were carried out. Evaluation of the experiments was then performed by analyzing the images obtained before and after the prestressing reinforcement failure.

4 Articoli
Accesso libero

Influence of conversion coatings on the resistance of adhesive joints to undercorrosion

Pubblicato online: 30 Dec 2021
Pagine: 70 - 78

Astratto

Abstract

The paper deals with the application of conversion coatings for the preparation of surfaces before adhesive bonding of galvanized and non-galvanized steels. The morphology of the coatings was monitored by electron microscopy. The corrosion characteristics of the conversion coatings were determined by linear polarization. Steels treated with conversion coatings were used to form bonded joints using three structural adhesives. The resistance of the joints to undercorrosion was determined following the change in the load-bearing capacity of the joints after exposure in the climatic chamber.

Accesso libero

Mitigation of chloride induced corrosion in reinforced concrete structures and its modeling

Pubblicato online: 30 Dec 2021
Pagine: 79 - 85

Astratto

Abstract

The paper is primarily focused on the description of transport of harmful species in concrete such as chlorides on one side and transport of corrosion inhibitors and nanoparticles used to diminish corrosion of steel reinforcement or seal the microstructure of concrete on the other side. The studied processes are helpful in reverting the chloride induced corrosion of the reinforcement in reinforced concrete structures. The transport mechanisms are summarized with the emphasis on their mathematical description and numerical solution. The paper shows modeling results of the processes including a comparison with experimental data on several typical examples. The efficiency of the methods is shown supported by experimental and numerical results. A good correlation of the models with experiments is achieved.

Accesso libero

Monitoring of the atmospheric corrosivity by resistive sensors

Pubblicato online: 30 Dec 2021
Pagine: 86 - 91

Astratto

Abstract

Atmospheric corrosivity is classified according to EN ISO 9223 Corrosion of metals and alloys – Corrosivity of atmospheres – Classification, determination and estimation. For the determination and estimation of the corrosivity category, standardized approaches are used. Monitoring of corrosivity with the application of various sensors is an actual trend. The paper gives results of verification of some types of sensors for this monitoring with standardized flat samples at atmospheric test sites in the Czech Republic. The trend of decreasing atmospheric corrosivity is evident in the last decade. Monitoring of the corrosion rate and mapping of the corrosivity become a very important step in preventing failures in long-term atmospheric exposition. This type of monitoring was used on bridge construction to estimate the seasonal effect of de-icing salts deposition, too.

Accesso libero

Anchorage length of patented wire cables in prestressed bridge girders

Pubblicato online: 30 Dec 2021
Pagine: 92 - 96

Astratto

Abstract

This paper briefly describes the methodology, performance and the obtained results of unique experiments performed on original I-73 precast bridge girders. The main objective of the experiments was to determine the actual anchorage length of corroded-through fully grouted prestressing reinforcement (prestressing wires), which is important for determination of the residual load-bearing capacity of prestressed structures. Observation probes leading all the way to the prestressing wires were drilled on selected sections of the girders along the length of the prestressing reinforcement. Optical image acquisition devices were then installed at these probes. Subsequently, controlled breakage of the patented wires (corrosion failure simulation) and observation of the changes that occurred in the prestressing wires after relief of stress were carried out. Evaluation of the experiments was then performed by analyzing the images obtained before and after the prestressing reinforcement failure.

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