<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2007-6835</journal-id>
<journal-title><![CDATA[Revista ALCONPAT]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. ALCONPAT]]></abbrev-journal-title>
<issn>2007-6835</issn>
<publisher>
<publisher-name><![CDATA[Asociación Latinoamericana de Control de Calidad, Patología y Recuperación de la Construcción A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-68352022000200279</article-id>
<article-id pub-id-type="doi">10.21041/ra.v12i2.571</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Concrete degradation by the formation of biogenic sulfuric acid in a Sewage Pumping Station]]></article-title>
<article-title xml:lang="pt"><![CDATA[Degradação do concreto através da formação de ácido sulfúrico biogênico em uma Estação Elevatória de Esgoto]]></article-title>
<article-title xml:lang="es"><![CDATA[Degradación del hormigón mediante la formación de ácido sulfúrico biogénico en una Estación de Bombeo de Aguas Residuales]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Coni]]></surname>
<given-names><![CDATA[Gabriella de Andrade]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Costa]]></surname>
<given-names><![CDATA[Amanda Tafuri]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Costa]]></surname>
<given-names><![CDATA[Adriana Gonçalves]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sakuma]]></surname>
<given-names><![CDATA[Guilherme]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Companhia de Saneamento Básico do Estado de São Paulo S.A  ]]></institution>
<addr-line><![CDATA[ State of São Paulo]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade de São Paulo  ]]></institution>
<addr-line><![CDATA[ São Paulo]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2022</year>
</pub-date>
<volume>12</volume>
<numero>2</numero>
<fpage>279</fpage>
<lpage>295</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-68352022000200279&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-68352022000200279&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-68352022000200279&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This work presents the study carried out in a Sewage Pumping Station after severe degradation was observed. The attack by biogenic sulfuric acid in sanitary sewage systems is widely studied in the literature, however, data on real work situations are still quite limited. Analyzes of the concentration of H &#120784; &#119826; in the air, carbonation depth, compressive strength, petrography, SEM/EDS, XRD and chemical determinations were carried out in concrete cores extracted above the effluent level. The products identified on the surface were Gypsum, Jarosite, Ferrous Hydroxide, Ferrous Chloride and possibly Hisingerite. The results demonstrate the presence of products on the surface, from the dissolution of cement paste as well as from the 16 mm steel bars located in the attacked region.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo Este trabalho apresenta o estudo realizado em uma Estação Elevatória de Esgoto após ser constatado severa degradação. O ataque por ácido sulfúrico biogênico em sistemas de esgoto sanitário é amplamente estudado na literatura, entretanto, dados em situações reais de obra ainda são bastante limitados. Foram realizadas análises da concentração de H 2 S no ar, profundidade de carbontação, ensaio de resistência à compressão, petrografia, MEV/EDS, DRX e determinações químicas em testemunhos de concreto extraídos acima do nível do efluente. Os produtos identificados na superfície foram Gipsita, Jarosita, Hidróxido Ferroso, Cloreto Ferroso e possivelmente Hisingerita. Os resultados demonstram a presença na superfície tanto de produtos oriundos da dissolução da pasta cimentícia quanto das barras de aço de 16 mm localizadas na região atacada.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Este trabajo presenta el estudio realizado en una Estación de Bombeo de Aguas Residuales luego de que se observara una severa degradación. El ataque por ácido sulfúrico biogénico en los sistemas de alcantarillado sanitario es ampliamente estudiado en la literatura, sin embargo, los datos sobre situaciones reales de trabajo aún son bastante limitados. Se realizaron análisis de concentración de H 2 S en el aire, profundidad de carbonatación, prueba de resistencia a la compresión, petrografía, SEM/EDS, XRD y determinaciones químicas en núcleos de concreto extraídos por encima del nivel del efluente. Los productos identificados en la superficie fueron yeso, jarosita, hidróxido ferroso, cloruro ferroso y posiblemente hisingerita. Los resultados demuestran la presencia en la superficie de productos de la disolución de pasta de cemento y barras de acero de 16 mm ubicadas en la región atacada.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[biogenic sulfuric acid attack]]></kwd>
<kwd lng="en"><![CDATA[degradation]]></kwd>
<kwd lng="en"><![CDATA[reinforced concrete]]></kwd>
<kwd lng="pt"><![CDATA[ataque por ácido sulfúrico biogénico]]></kwd>
<kwd lng="pt"><![CDATA[degradação]]></kwd>
<kwd lng="pt"><![CDATA[concreto armado]]></kwd>
<kwd lng="es"><![CDATA[ataque de ácido sulfúrico biogénico]]></kwd>
<kwd lng="es"><![CDATA[degradación]]></kwd>
<kwd lng="es"><![CDATA[hormigón armado]]></kwd>
</kwd-group>
</article-meta>
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<ref id="B24">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yuan]]></surname>
<given-names><![CDATA[H.]]></given-names>
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<source><![CDATA[Degradation modeling of concrete submitted to biogenic acid attack]]></source>
<year>2013</year>
<publisher-name><![CDATA[Université Paris-Est]]></publisher-name>
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</back>
</article>
