文章基本信息

标题：THE INFLUENCE OF CONTROLLED PERMEABILITY FORMWORKS ON THE MECHANICAL AND DURABILITY PROPERTIES OF CONCRETE COVER
其他标题：UTJECAJ OPLATA KONTROLIRANE PROPUSNOSTI NA MEHANIČKA I TRAJNOSNA SVOJSTVA ZAŠTITNOG SLOJA BETONA
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作者：Dubravka Bjegović ; Dubravka Bjegović ; Marijana Serdar 等
期刊名称：e-GFOS
电子版ISSN：1847-8948
出版年度：2012
卷号：4
页码：62-73
DOI：10.13167/2012.4.6
语种：English
出版社：Faculty of Civil Engineering Osijek
摘要：Controlled permeability formworks (CPF) are made from fibrous membranes which absorbthe excess water and air from the surface layer of fresh concrete. By this mechanism, the surface layer of concrete with lower water-to-cement ratio, compared to the inner concrete, is created. The aim of the experimental research was to evaluate and compare the influence of two commercially available CPF materials on mechanical and durability properties of concrete. During preparation of concrete elements thickness of concrete cover was varied (3 and 5 cm). Also, once the set of samples was prepared, the same formwork was used again, to evaluate the possibility of multiple usage of the same material. Following mechanical and durability tests were performed: ultrasonic test, reboundnumber test, pull-off, gas permeability and capillary absorption test. Properties of concrete prepared with CPF were compared to the properties of concrete prepared in traditional wooden formworks.
其他摘要：Oplate kontrolirane propusnosti (engl. Controlled Permeability Formwork, CPF) sastoje se od vlaknaste membrane koja upija višak vode i zraka iz površinskog sloja betona. Samim time, vodocementni omjer površinskog, zaštitnog sloja betona ostaje manji u odn
关键词：formwork;absorption materials;durability;gas permeability;bondstrength
其他关键词：oplate;apsorpcijski materijali;trajnost;plinopropusnost;prionjivost