Analysis of fiber-concrete interface in cement matrix composites

Abstract

In the present work, the properties of fiber-cement interface were evaluated in order to enable the use of continuous glassfiber-AR (alkali resistant), replacing steel bars often used in concrete structures by civil construction industry. Pull-out tests were applied in a continuous glassfiber-AR (alkali resistant) reinforcement element. The fiber was 250 mm length and it was inserted 50 mm in a cement matrix specimen whose dimensions are 100 x 100 x 100 mm. The bond strength values were compared to concrete specimen that was manufactured corrugated steel bars. Preliminary results identified an increase of 41% in the fiber-cement bond strength value by using glassfiber – AR when compared to steel bar and cement matrix composites.