<?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>0121-750X</journal-id>
<journal-title><![CDATA[Ingeniería]]></journal-title>
<abbrev-journal-title><![CDATA[ing.]]></abbrev-journal-title>
<issn>0121-750X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Distrital Francisco José de Caldas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0121-750X2023000300208</article-id>
<article-id pub-id-type="doi">10.14483/23448393.19517</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Comparative Analysis of the Use of Nanosilica and Fly Ash in Hydraulic Concrete]]></article-title>
<article-title xml:lang="es"><![CDATA[Análisis comparativo del uso de nanosílice y ceniza volante en el concreto hidráulico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Solache de la Torre]]></surname>
<given-names><![CDATA[Sara Cristina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Delgado-Hernandez]]></surname>
<given-names><![CDATA[David Joaquin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arteaga-Arcos]]></surname>
<given-names><![CDATA[Juan Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma del Estado de México Facultad de Arquitectura y Diseño ]]></institution>
<addr-line><![CDATA[Toluca Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma del Estado de México Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[Toluca Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma del Estado de México Facultad de Ciencias ]]></institution>
<addr-line><![CDATA[Toluca-Ixtlahuaca Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>28</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0121-750X2023000300208&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0121-750X2023000300208&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0121-750X2023000300208&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Context:  Nowadays, nanomaterials constitute an innovative alternative for the construction sector. This study evaluates the benefits of adding nanosilica and fly ash to Portland cement concrete in terms of its mechanical strength properties.  Method:  45 specimens were used to compare the compressive strength and durability of concrete mixtures with nanosilica and fly ash. The specimens were studied after 7, 14, and 21 days to determine their maximum resistance.  Results:  The addition of small amounts of nanosilica (up to 1 %) significantly improved the compressive strength of the concrete. In contrast, a large amount of fly ash (up to 8 %) was required for a noticeable effect.  Conclusions:  Concrete with nanosilica yielded the best results in terms of mechanical strength. The key to improving concrete through nanosilica and fly ash is to reduce the water-to-cement ratio using chemical agents that reduce porosity and increase resistance.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Contexto:  Hoy en día, los nanomateriales representan una alternativa innovadora para el sector de la construcción. Este estudio evalúa los beneficios de añadir nanosilice y ceniza volante al concreto de cemento Portland en función de sus propiedades de su resistencia mecánica.  Metodo:  Se utilizaron 45 especímenes para comparar la resistencia a la compresión y la durabilidad de mezclas de concreto con nanosilice y ceniza volante. Los especímenes fueron estudiados a los 7, 14 y 21 dias para determinar su máxima resistencia.  Resultados:  La adición de cantidades pequeñas de nanosilice (hasta 1 %) mejoraron significativamente la resistencia a la compresión del concreto. En contrate, se necesitó una gran cantidad de ceniza volante (hasta 8 %) para lograr un efecto notable.  Conclusiones:  El concreto con nanosilice dio los mejores resultados en cuanto a resistencia mecánica. La clave para mejorar el concreto con nanosilice y ceniza volante es reducir la relación cemento-agua utilizando agentes químicos que reduzcan la porosidad y aumenten la resistencia.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[concrete]]></kwd>
<kwd lng="en"><![CDATA[nanosilica]]></kwd>
<kwd lng="en"><![CDATA[fly ash]]></kwd>
<kwd lng="en"><![CDATA[strength]]></kwd>
<kwd lng="es"><![CDATA[concreto]]></kwd>
<kwd lng="es"><![CDATA[nanosilice]]></kwd>
<kwd lng="es"><![CDATA[cenizas volantes]]></kwd>
<kwd lng="es"><![CDATA[resistencia]]></kwd>
</kwd-group>
</article-meta>
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