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Willy Verstraete – One of the best experts on this subject based on the ideXlab platform.

  • Chemical and microbiological tests to simulate sulfuric Acid Corrosion of polymer-modified concrete
    Cement and Concrete Research, 2001
    Co-Authors: J Monteny, N. De Belie, E Vincke, Willy Verstraete, Luc Taerwe

    Abstract:

    Abstract In certain industrial activities sulfuric Acid is used during the production process, which may cause degradation of concrete structures. Another important phenomenon where sulfuric Acid is responsible for concrete Corrosion is biogenic sulfuric Acid Corrosion, which occurs often in sewer systems. Because previous investigations have already pointed out the difference between purely chemical sulfuric Acid Corrosion and biogenic sulfuric Acid Corrosion two different tests were performed: a chemical test and a microbiological test. Five different concrete compositions were used in the tests, including a reference mixture with high sulfate resistant portland cement and four different polymer cement concrete with a styrene–acrylic ester polymer, an acrylic polymer, a styrene butadiene polymer and a vinylcopolymer, respectively. The concrete composition with the styrene–acrylic ester polymer showed in both tests a higher resistance than the reference mixture while the compositions with the acrylic polymer and the styrene butadiene polymer had a lower resistance than the reference mixture. The concrete composition with the vinylcopolymer did not induce the same results in both tests. The results of the chemical test indicated a slight increase in resistance compared with the reference mixture while the opposite was noticed for the microbiological test.

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  • chemical microbiological and in situ test methods for biogenic sulfuric Acid Corrosion of concrete
    Cement and Concrete Research, 2000
    Co-Authors: J Monteny, Luc Taerwe, N. De Belie, E Vincke, Anne Beeldens, D Van Gemert, Willy Verstraete

    Abstract:

    Abstract Biogenic sulfuric Acid Corrosion is often a problem in sewer environment: it can lead to a fast degradation of the concrete structures. Since the involvement of bacteria in the Corrosion process was discovered, considerable microbiological research has been devoted to the understanding of the corrosive process. Mechanical engineers have focused on experiments comparing the resistance of several concrete mixes against biogenic sulfuric Acid Corrosion. Because of a lack of standardised methods, different test methods have been used, and various parameters have been modified to evaluate the resistance of the materials. The research done on sulfuric Acid Corrosion of concrete can roughly be divided in three groups: chemical tests, microbial simulation tests, and exposure tests in situ. In this article, an overview of the recent developments in the test methods for biogenic sulfuric Acid Corrosion and the obtained results are presented. Possible differences between biogenic sulfuric Acid Corrosion and chemical sulfuric Acid Corrosion are delineated.

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  • a new test procedure for biogenic sulfuric Acid Corrosion of concrete
    Biodegradation, 1999
    Co-Authors: E Vincke, J Monteny, Steven Verstichel, Willy Verstraete

    Abstract:

    A new test method is described for biogenic sulfuric Acid Corrosion of concrete, more specifically in sewer con-ditions.The aim of the new test method is the development of an accelerated and reproducible procedure formonitoring the resistance of different types of concrete with regard to biogenic sulfuric Acid Corrosion. This exper-imentalprocedure reflects worst case conditions by providing besides H2S, also an enrichment of thiobacilli andbiologically produced sulfur. By simulating the cyclic processes occurring in sewer pipes, significant differencesbetween concrete mixtures could be detected after 51 days. Concrete modified by a styrene-acrylic ester polymerdemonstrated a higher resistance against biogenic sulfuric Acid attack.

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J Monteny – One of the best experts on this subject based on the ideXlab platform.

  • Chemical and microbiological tests to simulate sulfuric Acid Corrosion of polymer-modified concrete
    Cement and Concrete Research, 2001
    Co-Authors: J Monteny, N. De Belie, E Vincke, Willy Verstraete, Luc Taerwe

    Abstract:

    Abstract In certain industrial activities sulfuric Acid is used during the production process, which may cause degradation of concrete structures. Another important phenomenon where sulfuric Acid is responsible for concrete Corrosion is biogenic sulfuric Acid Corrosion, which occurs often in sewer systems. Because previous investigations have already pointed out the difference between purely chemical sulfuric Acid Corrosion and biogenic sulfuric Acid Corrosion two different tests were performed: a chemical test and a microbiological test. Five different concrete compositions were used in the tests, including a reference mixture with high sulfate resistant portland cement and four different polymer cement concrete with a styrene–acrylic ester polymer, an acrylic polymer, a styrene butadiene polymer and a vinylcopolymer, respectively. The concrete composition with the styrene–acrylic ester polymer showed in both tests a higher resistance than the reference mixture while the compositions with the acrylic polymer and the styrene butadiene polymer had a lower resistance than the reference mixture. The concrete composition with the vinylcopolymer did not induce the same results in both tests. The results of the chemical test indicated a slight increase in resistance compared with the reference mixture while the opposite was noticed for the microbiological test.

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  • chemical microbiological and in situ test methods for biogenic sulfuric Acid Corrosion of concrete
    Cement and Concrete Research, 2000
    Co-Authors: J Monteny, Luc Taerwe, N. De Belie, E Vincke, Anne Beeldens, D Van Gemert, Willy Verstraete

    Abstract:

    Abstract Biogenic sulfuric Acid Corrosion is often a problem in sewer environment: it can lead to a fast degradation of the concrete structures. Since the involvement of bacteria in the Corrosion process was discovered, considerable microbiological research has been devoted to the understanding of the corrosive process. Mechanical engineers have focused on experiments comparing the resistance of several concrete mixes against biogenic sulfuric Acid Corrosion. Because of a lack of standardised methods, different test methods have been used, and various parameters have been modified to evaluate the resistance of the materials. The research done on sulfuric Acid Corrosion of concrete can roughly be divided in three groups: chemical tests, microbial simulation tests, and exposure tests in situ. In this article, an overview of the recent developments in the test methods for biogenic sulfuric Acid Corrosion and the obtained results are presented. Possible differences between biogenic sulfuric Acid Corrosion and chemical sulfuric Acid Corrosion are delineated.

    Free Register to Access Article

  • a new test procedure for biogenic sulfuric Acid Corrosion of concrete
    Biodegradation, 1999
    Co-Authors: E Vincke, J Monteny, Steven Verstichel, Willy Verstraete

    Abstract:

    A new test method is described for biogenic sulfuric Acid Corrosion of concrete, more specifically in sewer con-ditions.The aim of the new test method is the development of an accelerated and reproducible procedure formonitoring the resistance of different types of concrete with regard to biogenic sulfuric Acid Corrosion. This exper-imentalprocedure reflects worst case conditions by providing besides H2S, also an enrichment of thiobacilli andbiologically produced sulfur. By simulating the cyclic processes occurring in sewer pipes, significant differencesbetween concrete mixtures could be detected after 51 days. Concrete modified by a styrene-acrylic ester polymerdemonstrated a higher resistance against biogenic sulfuric Acid attack.

    Free Register to Access Article

Luc Taerwe – One of the best experts on this subject based on the ideXlab platform.

  • Chemical and microbiological tests to simulate sulfuric Acid Corrosion of polymer-modified concrete
    Cement and Concrete Research, 2001
    Co-Authors: J Monteny, N. De Belie, E Vincke, Willy Verstraete, Luc Taerwe

    Abstract:

    Abstract In certain industrial activities sulfuric Acid is used during the production process, which may cause degradation of concrete structures. Another important phenomenon where sulfuric Acid is responsible for concrete Corrosion is biogenic sulfuric Acid Corrosion, which occurs often in sewer systems. Because previous investigations have already pointed out the difference between purely chemical sulfuric Acid Corrosion and biogenic sulfuric Acid Corrosion two different tests were performed: a chemical test and a microbiological test. Five different concrete compositions were used in the tests, including a reference mixture with high sulfate resistant portland cement and four different polymer cement concrete with a styrene–acrylic ester polymer, an acrylic polymer, a styrene butadiene polymer and a vinylcopolymer, respectively. The concrete composition with the styrene–acrylic ester polymer showed in both tests a higher resistance than the reference mixture while the compositions with the acrylic polymer and the styrene butadiene polymer had a lower resistance than the reference mixture. The concrete composition with the vinylcopolymer did not induce the same results in both tests. The results of the chemical test indicated a slight increase in resistance compared with the reference mixture while the opposite was noticed for the microbiological test.

    Free Register to Access Article

  • chemical microbiological and in situ test methods for biogenic sulfuric Acid Corrosion of concrete
    Cement and Concrete Research, 2000
    Co-Authors: J Monteny, Luc Taerwe, N. De Belie, E Vincke, Anne Beeldens, D Van Gemert, Willy Verstraete

    Abstract:

    Abstract Biogenic sulfuric Acid Corrosion is often a problem in sewer environment: it can lead to a fast degradation of the concrete structures. Since the involvement of bacteria in the Corrosion process was discovered, considerable microbiological research has been devoted to the understanding of the corrosive process. Mechanical engineers have focused on experiments comparing the resistance of several concrete mixes against biogenic sulfuric Acid Corrosion. Because of a lack of standardised methods, different test methods have been used, and various parameters have been modified to evaluate the resistance of the materials. The research done on sulfuric Acid Corrosion of concrete can roughly be divided in three groups: chemical tests, microbial simulation tests, and exposure tests in situ. In this article, an overview of the recent developments in the test methods for biogenic sulfuric Acid Corrosion and the obtained results are presented. Possible differences between biogenic sulfuric Acid Corrosion and chemical sulfuric Acid Corrosion are delineated.

    Free Register to Access Article