<?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>0122-5383</journal-id>
<journal-title><![CDATA[CT&F - Ciencia, Tecnología y Futuro]]></journal-title>
<abbrev-journal-title><![CDATA[C.T.F Cienc. Tecnol. Futuro]]></abbrev-journal-title>
<issn>0122-5383</issn>
<publisher>
<publisher-name><![CDATA[Instituto Colombiano del Petróleo (ICP) - ECOPETROL S.A.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0122-53832017000200059</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[ADHESION FORCES IN ASPHALT MIXTURES AT NANOSCALE]]></article-title>
<article-title xml:lang="es"><![CDATA[FUERZAS DE ADHESIÓN EN MEZCLAS ASFÁLTICAS A ESCALA NANOMÉTRICA]]></article-title>
<article-title xml:lang="pt"><![CDATA[FORÇAS DE ADESÃO EM MISTURAS ASPHALT NA NANO ESCALA]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Contreras]]></surname>
<given-names><![CDATA[Yuly-Fernanda]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chaves-Guerrero]]></surname>
<given-names><![CDATA[Arlex]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Akbulut]]></surname>
<given-names><![CDATA[Mustaka]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cheng]]></surname>
<given-names><![CDATA[Zhengdong]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hoyos-Marín]]></surname>
<given-names><![CDATA[Luis-Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Industrial de Santander Escuela de Ingeniería Química ]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Corporación para la investigación y Desarrollo en Asfaltos  ]]></institution>
<addr-line><![CDATA[Piedecuesta ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Texas A&amp;M University Department of Chemical Engineering ]]></institution>
<addr-line><![CDATA[ TX]]></addr-line>
<country>USA</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Ecopetrol S.A Instituto Colombiano del Petróleo ]]></institution>
<addr-line><![CDATA[Piedecuesta Santander]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<volume>7</volume>
<numero>1</numero>
<fpage>59</fpage>
<lpage>72</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0122-53832017000200059&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0122-53832017000200059&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0122-53832017000200059&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The adhesion forces between bitumen and minerals were measured, using Atomic Force Microscopy (AFM). The AFM enables the study of the interactions between two molecules in a same surface or at interfaces and their behavior. In this case, bitumen samples with different properties were placed in contact with AFM modified tips. The tips were fabricated with minerals found in aggregates used in asphalt mixtures, like silicon dioxide (SiO2) and calcium carbonate (CaCO3). The work of adhesion was obtained measuring adhesion forces for each bitumen-mineral pair. The direct measurement of forces between asphalt and aggregates at interface level through nanoscopic techniques provides a better insight of the system and its characteristics. This will help to improve the selection of bitumen-aggregate combinations used in asphalt mixtures, obtaining systems with higher bond strength, therefore more resistant to failures.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Las fuerzas de adhesión entre asfalto y diferentes minerales fueron obtenidas empleando el microscopio de fuerza atómica (AFM). El AFM permite el estudio de la interacción entre dos moléculas en la misma superficie o en interfaces y su comportamiento. En esta investigación, varias muestras de asfalto con diferentes propiedades fueron puestas en contacto con puntas modificadas para el AFM. Estas puntas fueron fabricadas con minerales comúnmente encontrados en los agregados empleados en mezclas asfálticas, como son en dióxido de silicio (SiO2) y el carbonato de calcio (CaCO3). El trabajo de adhesión fue obtenido empleando curvas de fuerza - distancia para cada sistema asfalto-mineral. La medición directa de las fuerzas desarrolladas entre asfalto y agregado en la interface empleando técnicas nanoscopicas proveen un mejor entendimiento del sistema y sus características. Esto, sin duda alguna contribuirá en la selección de combinaciones asfalto - agregado empleadas en mezclas asfálticas que desarrollen enlaces más fuertes, produciendo sistemas más resistentes a las diferentes fallas relacionadas al fenómeno de adhesión que pueden generarse en pavimentos asfálticos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO As forças de adesão entre o asfalto e diversos minerais foram obtidas através microscópio de força atômica (AFM) O AFM possibilita o estudo entre duas moléculas na mesma superfície ou em interfaces e seu comportamento. Várias amostras de asfalto com diversas propriedades foram colocadas em contato com pontas modificadas para o AFM, nesta pesquisa. Essas pontas foram fabricadas com minerais geralmente encontrados nas adições empregadas em misturas asfálticas, tais como dióxido de silício (SiO2) e o carbonato de cálcio (CaCO3). O trabalho de adesão obteve-se empregando curvas de força (distância para cada sistema asfalto-mineral). A medição das forças desenvolvidas entre asfalto e adição na interface utilizando técnicas nanoscópicas dão uma melhor compreensão do sistema e suas características. Isso, sem dúvida nenhuma, irá contribuir na seleção de combinações asfalto - adições utilizadas em misturas asfálticas que desenvolvam ligações mais fortes, produzindo sistemas mais resistentes às diversas falhas relacionadas com o fenômeno de atrito que podem ser geradas em pavimentos asfálticos.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Work of adhesion]]></kwd>
<kwd lng="en"><![CDATA[Asphalt mixture]]></kwd>
<kwd lng="en"><![CDATA[AFM]]></kwd>
<kwd lng="en"><![CDATA[Bitumen]]></kwd>
<kwd lng="en"><![CDATA[Modified tips]]></kwd>
<kwd lng="en"><![CDATA[Calcium carbonate]]></kwd>
<kwd lng="en"><![CDATA[Silicon dioxide]]></kwd>
<kwd lng="en"><![CDATA[Aggregates]]></kwd>
<kwd lng="es"><![CDATA[Trabajo de adhesión]]></kwd>
<kwd lng="es"><![CDATA[Mezclas asfálticas]]></kwd>
<kwd lng="es"><![CDATA[AFM]]></kwd>
<kwd lng="es"><![CDATA[Asfalto]]></kwd>
<kwd lng="es"><![CDATA[Puntas modificadas]]></kwd>
<kwd lng="es"><![CDATA[Carbonato de calcio]]></kwd>
<kwd lng="es"><![CDATA[Dióxido de silicio]]></kwd>
<kwd lng="es"><![CDATA[Agregados]]></kwd>
<kwd lng="pt"><![CDATA[Trabalho de adesão]]></kwd>
<kwd lng="pt"><![CDATA[Misturas asfálticas]]></kwd>
<kwd lng="pt"><![CDATA[AFM]]></kwd>
<kwd lng="pt"><![CDATA[Asfalto]]></kwd>
<kwd lng="pt"><![CDATA[Pontas modificadas]]></kwd>
<kwd lng="pt"><![CDATA[Carbonato de cálcio]]></kwd>
<kwd lng="pt"><![CDATA[Dióxido de silício]]></kwd>
<kwd lng="pt"><![CDATA[Adições.]]></kwd>
</kwd-group>
</article-meta>
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