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[EN]The "Concrete Additives" task forcé was created within the\ud"Concretes'VIRANOR Technical Commission-83 in 1983. It\udpresently answers to the AENOR.\udIts principie objective during these years has been the\udelaboration of Spanish regulations concerning fiy ash to be\udused in morters and concretes made with Portland cement.\udThe main purpose of this study, in which a comparative\udanalysis of International regulations is also included, is the\udexposition of these regulations, as well as the steps to be\udtaken in their constant up-dating.\udIn addition, a summary of the characteristics of fIy ash\udproduced in Spain before the elaboration of the UNE norms\udis also included.[ES]En 1983 se creó el Grupo de Trabajo "Adiciones al Hormigón"\uden el seno de la Comisión Técnica-83 "Hormigones'VIRANOR,\udactualmente transferido a AENOR.\udSu finalidad principal, durante estos años, ha sido la\udelaboración de la normativa española sobre las cenizas\udvolantes que hayan de ser utilizadas en morteros y hormigones\udde cemento portland. Su exposición es el objeto principal de\udeste trabajo, en el que se incluye también un análisis\udcomparativo con la normativa internacional, así como los pasos\uda seguir en la actualización constante de las normas.\udAsimismo se recoge un resumen de las características de las\udcenizas volantes generadas en España con anterioridad a la\udelaboración de las Normas UNE.Peer reviewe

Normalización española sobre cenizas volantes (normas UNE)