<?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>S2007-68352015000100006</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Resistencia a la compresión y evolución microestructural de geopolímeros base metacaolín expuestos a alta temperatura]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Burciaga-Díaz]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Escalante-Garcia]]></surname>
<given-names><![CDATA[J. I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Magallanes-Rivera]]></surname>
<given-names><![CDATA[R. X.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,IPN Cinvestav Ingenieria Cerámica]]></institution>
<addr-line><![CDATA[ Coahuila]]></addr-line>
<country>MX</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,UANL Fac. de Ing. Civil ]]></institution>
<addr-line><![CDATA[Nuevo León ]]></addr-line>
<country>MX</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2015</year>
</pub-date>
<volume>5</volume>
<numero>1</numero>
<fpage>58</fpage>
<lpage>73</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-68352015000100006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-68352015000100006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-68352015000100006&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Esta investigación presenta resultados de resistencia a la compresión y evolución microestructural de geopolímeros expuestos a alta temperatura. Se elaboraron pastas, con mezclas de metacaolín y soluciones de silicato de sodio e NaOH. Se investigó el efecto de la composición química sobre el desarrollo de resistencia a la compresión; pastas con alta resistencia fueron expuestas a 200, 500 y 800°C, caracterizando su evolución microestructural y resistencia a compresión. Previo a la exposición a alta temperatura, los geopolímeros desarrollaron ~ 80MPa, y posterior a su exposición, la pérdida de resistencia dependió fuertemente de la relación SiO2/Al2O3. Resultados de DRX, FT-IR y MEB sugieren que la reorganización del gel de sílice y evaporación de agua, reducen la estabilidad mecánica de los geopolímeros expuestos a alta temperatura.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[This research presents results of compressive strength and microstructural evolution of geopolymers exposed to high temperatures. Pastes of molar were elaborated blending metakaolin and sodium silicate solutions containing NaOH. The effect of the composition on the development of compressive strength was investigated and pastes were chosen to be exposed to 200, 500 and 800 °C, characterizing their microstructure and compressive strength. Before to high temperature exposure, the binders developed ~80MPa, and after their exposition, the loss of strength depended of the ratio SiO2/Al2O3. Results of XRD, FT-IR and SEM suggest that the reorganization of the silica gel and the water evaporation reduce the thermal stability of samples exposed to high temperature.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Esta pesquisa apresenta resultados de resistência à compressão e evolução da microestrutura de pastas geopoliméricas expostas a altas temperaturas. Foram preparadas pastas, a partir de misturas de metacaulim com soluções de silicato de sódio e NaOH. Foi então pesquisado o efeito da composição química sobre o desenvolvimento de resistência à compressão e selecionadas pastas foram expostas a 200oC, 500oC e 800°C, caracterizando a evolução da microestrutura e a resistência à compressão. Antes da exposição à alta temperatura, os geopolímeros alcançaram 80MPa, e pós-exposição, a perda de resistência dependeu da relação SiO2/Al2O3. Os resultados de DRX, FT-IR e MEB sugerem que a reorganização do gel de sílica e a evaporação de água reduzem a estabilidade mecânica do geopolimero expostos à alta temperatura.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Geopolímeros]]></kwd>
<kwd lng="es"><![CDATA[metacaolín]]></kwd>
<kwd lng="es"><![CDATA[resistencia térmica]]></kwd>
<kwd lng="es"><![CDATA[resistencia a compresión]]></kwd>
<kwd lng="es"><![CDATA[microestructuras]]></kwd>
<kwd lng="en"><![CDATA[Geopolymers]]></kwd>
<kwd lng="en"><![CDATA[metakaolin]]></kwd>
<kwd lng="en"><![CDATA[thermal performance]]></kwd>
<kwd lng="en"><![CDATA[compressive strength]]></kwd>
<kwd lng="en"><![CDATA[microstructures]]></kwd>
<kwd lng="pt"><![CDATA[geopolímeros]]></kwd>
<kwd lng="pt"><![CDATA[metacaulim]]></kwd>
<kwd lng="pt"><![CDATA[resistência ao calor]]></kwd>
<kwd lng="pt"><![CDATA[resistência à compressão]]></kwd>
<kwd lng="pt"><![CDATA[microestruturas]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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