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Segmentary impregnating textile reinforced concrete, methodology and introduction
The efficiency of the high-performance rovings to bear load in the use of Textile Reinforced Concrete (TRC) is relatively low in comparison with strength of dry textile due to incomplete penetration of cementitious matrix into bundle of fibers. Accordingly, the textile is impregnated with a polymer resin to increase the load bearing capacity of bundle of fibers in concrete. However, transferring the stress from the matrix to the reinforcement is usually challenging due to reduced interface area between the reinforcement and the cementitious matrix. For this purpose, providing definite resin segments on the roving is suggested in this paper. The method of inserting segments and the impact of segments geometry on the flexural strength of concrete specimens are addressed. Different shapes of segments, namely cubic, disk, spherical and ring are embedded on roving using epoxy resin. A 2400 tex AR-glass roving (Cem-FIL LTR ARC 27 micron) is surrounded with 2.1 mm chain stitch length by Malimo Machine. Segments are incorporated on roving with distance 20 mm, then four segmentary impregnated rovings are embedded in the fine grained concrete with nominal dimensions 170x69x20 mm. Three point bending tests have been carried out to determine the flexural strength of the specimens. The empirical results reveal that a small amount of AR-glass fibers (0.27 % of vol.) impregnated by cubic segments increase the flexural strength of TRC nearly three times higher than dry roving. More investigation on the density, the geometry and the arrangement of segments is necessary to determine the additional features of the segmentary impregnated roving in concrete.
Segmentary impregnating textile reinforced concrete, methodology and introduction
The efficiency of the high-performance rovings to bear load in the use of Textile Reinforced Concrete (TRC) is relatively low in comparison with strength of dry textile due to incomplete penetration of cementitious matrix into bundle of fibers. Accordingly, the textile is impregnated with a polymer resin to increase the load bearing capacity of bundle of fibers in concrete. However, transferring the stress from the matrix to the reinforcement is usually challenging due to reduced interface area between the reinforcement and the cementitious matrix. For this purpose, providing definite resin segments on the roving is suggested in this paper. The method of inserting segments and the impact of segments geometry on the flexural strength of concrete specimens are addressed. Different shapes of segments, namely cubic, disk, spherical and ring are embedded on roving using epoxy resin. A 2400 tex AR-glass roving (Cem-FIL LTR ARC 27 micron) is surrounded with 2.1 mm chain stitch length by Malimo Machine. Segments are incorporated on roving with distance 20 mm, then four segmentary impregnated rovings are embedded in the fine grained concrete with nominal dimensions 170x69x20 mm. Three point bending tests have been carried out to determine the flexural strength of the specimens. The empirical results reveal that a small amount of AR-glass fibers (0.27 % of vol.) impregnated by cubic segments increase the flexural strength of TRC nearly three times higher than dry roving. More investigation on the density, the geometry and the arrangement of segments is necessary to determine the additional features of the segmentary impregnated roving in concrete.
Segmentary impregnating textile reinforced concrete, methodology and introduction
Segmentweises Imprägnieren von textilverstärktem Beton
Mehdi Kamali Dolatabadi (author) / Janetzko, Steffen (author) / Gries, Thomas (author)
2010
6 Seiten, 12 Bilder, 19 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
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