Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Cellulose Fibre Concrete
In this investigation concretes and mortars containing different kinds of cellulose fibers were developed. The aim was to select suitable types of fibers for various kinds of concrete products. Four types of cellulose fibres and three manufacturing methods from the concrete industry were studied. The properties of cellulose-fiber-reinforced concrete were compared with those of concrete without fibres. Cellulose-fibre concrete was made using conventional and pressurecasting methods. As cellulose fibres were used only to modify concrete properties, a conventional casting method was employed when using a small fibre dosage. The pressure-casting method is suitable when great amount of fibres is used. Due to the cellular structure of fibres the density of the concrete can be reduced to roughly 100 kg/cubic meter. The mechanical and durability properties of cellulose-fibre concretes were investigated with accelerated laboratory tests simulating the effects of wetting-drying and freezing-thawing. Low-cellulose fibre contents do not essentially increase the volumetric expansion or contraction of concrete in conditions of variable humidity. Cellulose-fibre-reinforced sprayed concrete withstands 1500 freeze-thaw cycles without loss of compressive and flexural strength. Cellulose fibre lime-cement mortar (mortar with higher cement content) adequately withstood the influence of frost without loss of compressive and flexural strength after 1465 freeze-thaw cycles.
Cellulose Fibre Concrete
In this investigation concretes and mortars containing different kinds of cellulose fibers were developed. The aim was to select suitable types of fibers for various kinds of concrete products. Four types of cellulose fibres and three manufacturing methods from the concrete industry were studied. The properties of cellulose-fiber-reinforced concrete were compared with those of concrete without fibres. Cellulose-fibre concrete was made using conventional and pressurecasting methods. As cellulose fibres were used only to modify concrete properties, a conventional casting method was employed when using a small fibre dosage. The pressure-casting method is suitable when great amount of fibres is used. Due to the cellular structure of fibres the density of the concrete can be reduced to roughly 100 kg/cubic meter. The mechanical and durability properties of cellulose-fibre concretes were investigated with accelerated laboratory tests simulating the effects of wetting-drying and freezing-thawing. Low-cellulose fibre contents do not essentially increase the volumetric expansion or contraction of concrete in conditions of variable humidity. Cellulose-fibre-reinforced sprayed concrete withstands 1500 freeze-thaw cycles without loss of compressive and flexural strength. Cellulose fibre lime-cement mortar (mortar with higher cement content) adequately withstood the influence of frost without loss of compressive and flexural strength after 1465 freeze-thaw cycles.
Cellulose Fibre Concrete
S. Vares (Autor:in) / L. Sarvaranta (Autor:in) / M. Lanu (Autor:in)
1997
112 pages
Report
Keine Angabe
Englisch
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The durability of cellulose fibre reinforced concrete pipes in sewage applications
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