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A platform for research: civil engineering, architecture and urbanism
New textile grids for prefabricated panels in fiber-cement
Fibre-cement composite material are commonly used in civil engineering in the form slim plate or slim shells. Technical textiles are proposed for the reinforcement of panels in fibre-cement. Production technologies of textile surfaces offer different construction possibilities. Texinov works in the field of technical textiles and has the experience especially in the technology of warp-knitting with or without adjunction of unidirectional or bi-directional weft threads. Examples of warp-knitted fabrics with weft threads in two directions (warp-wise and weft-wise) are presented. Five different warp knitted grid structures for the reinforcement of concrete on the basis of coated polyester, polyethylene as well as coated polyethylene were described. The used mortar is fluidised mortar whose composition is as follows: HPR cement, normalised sand, water and superplastifying Rheobuild 1000. The tenacity of the composite corresponds to a measure of the quantity of necessary energy to produce the total rupture of the composite or a given deformation when this composite is submitted to a static stress or to a dynamic load. During tests, the area under the load-deflection curve represents the tenacity. The impact resistance and the impact behaviour were tested. The impactor is a steel half-sphere with 5 cm in diameter and a mass of 241 g which falls on the specimen. The height of fall varies from 1 cm to 1 m. The impactor of 241 g is not heavy enough to obtain any destruction. Therefore the total weight was increased to 1064 g. Three phenomena were observed: (i) crack formation on the plate, (ii) hole formation in the plate without destruction of the reinforcement, and (iii) collapse of the plate. For different reinforcements, cracks appear for energy of impact in the range of 0.5 J and the rupture of the womb for about 1 J.
New textile grids for prefabricated panels in fiber-cement
Fibre-cement composite material are commonly used in civil engineering in the form slim plate or slim shells. Technical textiles are proposed for the reinforcement of panels in fibre-cement. Production technologies of textile surfaces offer different construction possibilities. Texinov works in the field of technical textiles and has the experience especially in the technology of warp-knitting with or without adjunction of unidirectional or bi-directional weft threads. Examples of warp-knitted fabrics with weft threads in two directions (warp-wise and weft-wise) are presented. Five different warp knitted grid structures for the reinforcement of concrete on the basis of coated polyester, polyethylene as well as coated polyethylene were described. The used mortar is fluidised mortar whose composition is as follows: HPR cement, normalised sand, water and superplastifying Rheobuild 1000. The tenacity of the composite corresponds to a measure of the quantity of necessary energy to produce the total rupture of the composite or a given deformation when this composite is submitted to a static stress or to a dynamic load. During tests, the area under the load-deflection curve represents the tenacity. The impact resistance and the impact behaviour were tested. The impactor is a steel half-sphere with 5 cm in diameter and a mass of 241 g which falls on the specimen. The height of fall varies from 1 cm to 1 m. The impactor of 241 g is not heavy enough to obtain any destruction. Therefore the total weight was increased to 1064 g. Three phenomena were observed: (i) crack formation on the plate, (ii) hole formation in the plate without destruction of the reinforcement, and (iii) collapse of the plate. For different reinforcements, cracks appear for energy of impact in the range of 0.5 J and the rupture of the womb for about 1 J.
New textile grids for prefabricated panels in fiber-cement
Neue Textilgitter für Prepregs in Faserzement
Ducol, J.P. (author)
Techtextil Symposium, 1998 ; 1 ; 247-254
1998
8 Seiten, 20 Bilder, 1 Tabelle
Conference paper
English
| NTIS | 1973