<?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>1665-6423</journal-id>
<journal-title><![CDATA[Journal of applied research and technology]]></journal-title>
<abbrev-journal-title><![CDATA[J. appl. res. technol]]></abbrev-journal-title>
<issn>1665-6423</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias Aplicadas y Tecnología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-64232024000100032</article-id>
<article-id pub-id-type="doi">10.22201/icat.24486736e.2024.22.1.2131</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Study of the combined effect of coffee husk ash and polypropylene fibres on the mechanical properties of concrete]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñoz Pérez]]></surname>
<given-names><![CDATA[S. P.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rivera Segura]]></surname>
<given-names><![CDATA[M. E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alejandria Bustamante]]></surname>
<given-names><![CDATA[Y. A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villena Zapata]]></surname>
<given-names><![CDATA[L. I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Cesar Vallejo Faculty of Civil Engineering and Architecture Professional School of Civil Engineering]]></institution>
<addr-line><![CDATA[Trujillo ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Señor de Sipan Faculty of Engineering, Architecture and Urbanism Professional School of Civil Engineering]]></institution>
<addr-line><![CDATA[Pimentel ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad César Vallejo School of Business Science Professional School of Business Administration]]></institution>
<addr-line><![CDATA[Trujillo ]]></addr-line>
<country>Peru</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<volume>22</volume>
<numero>1</numero>
<fpage>32</fpage>
<lpage>41</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-64232024000100032&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-64232024000100032&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-64232024000100032&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In this research, the effects produced by the combination of coffee husk ash and polypropylene fibers in the production of concrete were studied to evaluate the mechanical properties and determine an optimum design combination. Two standard concrete mix designs of f'c= 210 and 280 kg/cm2 were developed, and experimental treatments of standard concrete were designed by adding coffee husk ash at 5%, 10% and 15% combined with polypropylene fibers at 1%, 2.5 % and 5%. The results showed that the resistance differs in 8.94% and 4.11% in compression, 8.55% and 15.03% in traction, 10.89% and 8.96% in bending and increases the modulus of elasticity in 5.66% and 14.15% with respect to the standard designs f'c= 210 and 280 kg/cm2. It is concluded that the mechanical characteristics are lower compared to the standard mix designs.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Coffee husk ash]]></kwd>
<kwd lng="en"><![CDATA[concrete]]></kwd>
<kwd lng="en"><![CDATA[mechanical properties]]></kwd>
<kwd lng="en"><![CDATA[polypropylene fiber]]></kwd>
</kwd-group>
</article-meta>
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