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STRENGTH OF STEEL-FIBER-REINFORCED POLYMER CONCRETE - EFFECT OF IMPREGNATION TECHNIQUE

1987-01-01
Gündüz, Güngör
YALCIN, N
Ordinary concrete was modified by three different techniques, (i) steel fibre reinforcement, (ii) polymer impregnation, and (iii) by both steel fibre reinforcement and polymer impregnation. Impregnating steel-fibre-reinforced concrete results in combined reinforcing effects. The flexural strength of concrete was increased 1·48 times by steel fibre reinforcement, 5·42 times by polymer impregnation, and 6·3 times by the combined technique. Polymer loading was increased from 7 to 9·5% by pressure impregnation at 15 atm, and to 8·35% by vacuum impregnation at 5 mm Hg. The flexural strength of steel-fibre-reinforced polymer-impregnated concrete at these polymer loadings was increased by 7·4 and 7·1 times respectively over the ordinary concrete. Pressure impregnation resulted in higher increase in strength compared to vacuum impregnation at the same polymer loadings.