{"id":85440,"date":"2018-03-10T00:09:53","date_gmt":"2018-03-10T00:09:53","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/effect-of-superplasticizers-on-the-behavior-of-concrete-in-the-fresh-and-hardened-states-implications-for-high-performance-concretes\/"},"modified":"2018-03-10T00:09:53","modified_gmt":"2018-03-10T00:09:53","slug":"effect-of-superplasticizers-on-the-behavior-of-concrete-in-the-fresh-and-hardened-states-implications-for-high-performance-concretes","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-tecnologicas\/effect-of-superplasticizers-on-the-behavior-of-concrete-in-the-fresh-and-hardened-states-implications-for-high-performance-concretes\/","title":{"rendered":"Effect of superplasticizers on the behavior of concrete in the fresh and hardened states: implications for high performance concretes"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Juan a M. Roncero Rico <\/strong><\/h2>\n<p>La incorporaci\u00f3n de aditivos quimicos en el hormigon es, actualmente, una pr\u00e1ctica com\u00fan especialmente en homigones de altas prestaciones(hap),los cuales se caracterizan por poseer unas excelentes propiedades, mec\u00e1nicas as\u00ed como una gran durabilidad debido a que presentan, desde el punto de vista microestructural, una matriz m\u00e1s compacta y por tanto menos permeable y m\u00e1s resistente que la de un hormig\u00f3n convencional. Uno de los aditivos m\u00e1s empleados en la tecnolog\u00eda del hpc es el superplastificante, que proporciona elevada trabajabilidad en hormigones con relaciones agua\/cemento bajas. sin embargo, su incorporaci\u00f3n en el hormig\u00f3n puede afectar otras propiedades de \u00e9ste, tanto en el estado fresco como en el endurecido. El presente trabajo se centra en el estudio del efecto de los superplastificantes sobre diversas propiedades del hpc y en los posibles mecanismos involucrados. En el estado fresco, se eval\u00faa la influencia que tiene el aditivo en la fluidez, perdida de fluidez en el tiempo, demanda de agua y fraguado, teniendo en cuenta el efecto de la temperatura ambiental. Los ensayos, que se realizan con el cono de marsh, permiten obtener relevantes conclusiones sobre los mecanismos que controlan la fluidez de las pastas a elevadas temperaturas y la independencia de la dosis \u00f3ptima de aditivo (punto de saturaci\u00f3n) con la temperatura. adem\u00e1s, se desarrolla un estudio comparativo entre las propiedades de la pasta del cemento, mortero y hormig\u00f3n con incorporaci\u00f3n de superplastificantes, con el objetivo de evaluar la influencia de la pasta en la trabajabilidad\/consistencia del hormigon y mortero asi como en la perdida de trabajabilidad con el tiempo. Los resultados de este estudio permiten concluir que la optimizaci\u00f3n de la dosis de superplastificante en la pasta de cemento puede ser el punto de partida en la dosificaci\u00f3n del hpc. Adem\u00e1s, se pone de manifiesto el importante papel de los \u00e1ridos, especialmente los m\u00e1s finos<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Effect of superplasticizers on the behavior of concrete in the fresh and hardened states: implications for high performance concretes<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Effect of superplasticizers on the behavior of concrete in the fresh and hardened states: implications for high performance concretes <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Juan a M. Roncero Rico <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de catalunya<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 29\/06\/2000<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Ravindra Gettu<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Antonio Aguado de cea <\/li>\n<li>henrik Stang (vocal)<\/li>\n<li>peter Bartos (vocal)<\/li>\n<li>antonia Pacios alvarez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Juan a M. Roncero Rico La incorporaci\u00f3n de aditivos quimicos en el hormigon es, actualmente, una pr\u00e1ctica [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[332,15596,4306,10558],"tags":[16466,15651,179899,179898,179900,48891],"class_list":["post-85440","post","type-post","status-publish","format-standard","hentry","category-ciencias-tecnologicas","category-politecnica-de-catalunya","category-tecnologia-de-la-construccion","category-tecnologia-del-hormigon","tag-antonia-pacios-alvarez","tag-antonio-aguado-de-cea","tag-henrik-stang","tag-juan-a-m-roncero-rico","tag-peter-bartos","tag-ravindra-gettu"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/85440","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/comments?post=85440"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/85440\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=85440"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=85440"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=85440"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}