Presentation Title

Service Life Modeling of Reinforced Concrete Structures with Zeolite Based Cementitious Materials

Faculty Mentor

Pratanu Gosh

Start Date

23-11-2019 8:45 AM

End Date

23-11-2019 9:30 AM

Location

150

Session

poster 2

Type of Presentation

Poster

Subject Area

engineering_computer_science

Abstract

Construction Infrastructure is most commonly made with concrete materials. Even though it is always projected to meet at certain service life, sometimes there are scenarios where structures are set in place at different environmental conditions that most others aren’t, infrastructures such as concrete bridges and pavements are often subjected to more corrosion compared to other structures. Corrosion deteriorates the service life of reinforced concrete structures and make it less durable.

That’s where HPC (High Performance Concrete) comes in useful, by replacing some portion of OPC (Ordinary Portland Cement) with other durable and sustainable cementitious materials, it is possible to solve the problem and prevent the consequences of corrosion in reinforced concrete. Natural Pozzolanic material Zeolite and other supplementary cementitious materials namely Silica Fume, Pumice, Metakaolin work as a partial replacement for OPC by enhancing the performance of structures and making them more resistant to corrosion without compromising their strength.

In this research, NDT (Non-Destructive Testing) data was collected which was performed to measure the electrical surface resistivity, electrical bulk resistivity and electrical conductivity of the concrete sample for a wide set of binary, ternary based mixtures as well as the ordinary Portland cement mixture.

Once the data was collected, the diffusion coefficient of each concrete mixture was computed via various established different models, then with that it was possible to obtain the aging factor of the diffusion coefficient and corrosion initiation time which provides a better overall service life of High Performance Concrete mixtures.

Finally, total service life is obtained by adding corrosion initiation and propagation time. The data collected from the test provide favorable options for infrastructures such as bridges and pavements to utilize the partial replacement of Zeolite and other supplementary cementitious materials in concrete mixtures for an overall better resistance to corrosion while not compromising the strength.

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Nov 23rd, 8:45 AM Nov 23rd, 9:30 AM

Service Life Modeling of Reinforced Concrete Structures with Zeolite Based Cementitious Materials

150

Construction Infrastructure is most commonly made with concrete materials. Even though it is always projected to meet at certain service life, sometimes there are scenarios where structures are set in place at different environmental conditions that most others aren’t, infrastructures such as concrete bridges and pavements are often subjected to more corrosion compared to other structures. Corrosion deteriorates the service life of reinforced concrete structures and make it less durable.

That’s where HPC (High Performance Concrete) comes in useful, by replacing some portion of OPC (Ordinary Portland Cement) with other durable and sustainable cementitious materials, it is possible to solve the problem and prevent the consequences of corrosion in reinforced concrete. Natural Pozzolanic material Zeolite and other supplementary cementitious materials namely Silica Fume, Pumice, Metakaolin work as a partial replacement for OPC by enhancing the performance of structures and making them more resistant to corrosion without compromising their strength.

In this research, NDT (Non-Destructive Testing) data was collected which was performed to measure the electrical surface resistivity, electrical bulk resistivity and electrical conductivity of the concrete sample for a wide set of binary, ternary based mixtures as well as the ordinary Portland cement mixture.

Once the data was collected, the diffusion coefficient of each concrete mixture was computed via various established different models, then with that it was possible to obtain the aging factor of the diffusion coefficient and corrosion initiation time which provides a better overall service life of High Performance Concrete mixtures.

Finally, total service life is obtained by adding corrosion initiation and propagation time. The data collected from the test provide favorable options for infrastructures such as bridges and pavements to utilize the partial replacement of Zeolite and other supplementary cementitious materials in concrete mixtures for an overall better resistance to corrosion while not compromising the strength.