<?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>2218-3620</journal-id>
<journal-title><![CDATA[Revista Universidad y Sociedad]]></journal-title>
<abbrev-journal-title><![CDATA[Universidad y Sociedad]]></abbrev-journal-title>
<issn>2218-3620</issn>
<publisher>
<publisher-name><![CDATA[Editorial "Universo Sur"]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2218-36202019000300147</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[ECUACIONES PARA PREDECIR LOS PORCENTAJES DE CaO, SiO2, Al2O3, Fe2O3 Y SO3 EN EL CLINKER]]></article-title>
<article-title xml:lang="en"><![CDATA[EQUATIONS TO PREDICT THE PERCENTAGES OF CaO, SiO2, Al2O3, Fe2O3 AND SO3 IN CLINKER]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarez Bravo]]></surname>
<given-names><![CDATA[Carlos Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cortés Cortés]]></surname>
<given-names><![CDATA[Manuel E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Tamayo]]></surname>
<given-names><![CDATA[Yoandy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Cienfuegos  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2019</year>
</pub-date>
<volume>11</volume>
<numero>3</numero>
<fpage>147</fpage>
<lpage>153</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2218-36202019000300147&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2218-36202019000300147&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2218-36202019000300147&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El cálculo de los porcentajes de los óxidos CaO, SiO2, Al2O3, Fe2O3 y SO3 en el clínker es un tema interesante y de gran utilidad en los momentos actuales, pues con el conocimiento de estos porcentajes pueden calcularse las fases minerales del clínker en la producción de cemento, en función de lo anterior el objetivo fundamental de la siguiente investigación es obtener un grupo de 5 ecuaciones que permitan predecir los porcentajes de los óxidos antes mencionados en la producción de clínker de la Empresa Mixta &#8220;Cementos Cienfuegos S.A&#8221; (CCSA) ubicada en la provincia de Cienfuegos, y con ello influir en la reducción de los daños derivados del proceso de fabricación de dicho producto. En la actualidad el cálculo se realiza a partir del uso de instrumentos de laboratorio en el clínker ya producido, pero el interés de los especialistas es realizar el mismo antes de la obtención del clínker y a partir de los porcentajes de los óxidos en la materia prima para tomar las decisiones en el proceso de producción del mismo, garantizando la calidad del producto y una disminución en las pérdidas por producciones de baja calidad y en los daños al Medio Ambiente, de ahí la necesidad de estimar los modelos de la relación entre los porcentajes de cada óxido en la materia prima y en el clínker. Los modelos estimados mediante el análisis de regresión lineal simple son de gran utilidad en el control de la calidad del clínker, se corroboran en cuanto a su validez estadística, estabilidad y precisión, e influyen en la reducción de los daños al medio ambiente derivados del proceso de fabricación de dicho producto.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The calculation of the percentages of the oxides CaO, SiO2, Al2O3, Fe2O3 and SO3 in the clinker is an interesting and very useful topic at the present time, because with the knowledge of these percentages, the mineral phases of the clinker can be calculated in the production cement, based on the above, the fundamental objective of the following research is to obtain a group of 5 equations that allow predicting the percentages of the aforementioned oxides in the production of clinker of the Mixed Enterprise "Cementos Cienfuegos SA" (CCSA) located in the province of Cienfuegos, and with it to influence in the reduction of the damages derived from the process of manufacture of the mentioned product. Currently, the calculation is made from the use of laboratory instruments in the clinker already produced, but the interest of the specialists is to perform the same before obtaining the clinker and from the percentages of the oxides in the raw material for making decisions in the production process, guaranteeing the quality of the product and a decrease in losses due to low quality productions and damage to the environment, hence the need to estimate the models of the relationship between the percentages of every oxide in the raw material and in the clinker. The models estimated by the simple linear regression analysis are very useful in the control of clinker quality. They are corroborated in terms of their statistical validity, stability and precision, and they influence the reduction of environmental damage caused by the process of manufacture of the product.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Ecuaciones para predecir los porcentajes de CaO]]></kwd>
<kwd lng="es"><![CDATA[SiO2]]></kwd>
<kwd lng="es"><![CDATA[Al2O3]]></kwd>
<kwd lng="es"><![CDATA[Fe2O3 y SO3]]></kwd>
<kwd lng="es"><![CDATA[Clínker]]></kwd>
<kwd lng="es"><![CDATA[Regresión lineal]]></kwd>
<kwd lng="en"><![CDATA[Equations to predict the percentages of CaO]]></kwd>
<kwd lng="en"><![CDATA[SiO2]]></kwd>
<kwd lng="en"><![CDATA[Al2O3]]></kwd>
<kwd lng="en"><![CDATA[Fe2O3 and SO3]]></kwd>
<kwd lng="en"><![CDATA[Clinker]]></kwd>
<kwd lng="en"><![CDATA[Linear regression]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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