Investigating the Effect of Applying Polypropylene Fiber on Compressive Strength of Self-consolidating Concrete

Mechanical characteristics of fiber concrete is affected by type, percentage, length to diameter ration, context resistance, size and shape of fiber, sample preparing method and size and shape of sand material. Therefore, in order to use in each case, mix design should be prepared and it must be tested. The current research have been designed and conducted in order to examine the effect of applying propylene fiber on pressure behavior of Self- consolidating concrete. Washed sand with fineness modulus of 3.19 was used in order to prepare experimental samples. The sand which was used in self-consolidating concrete was of broken sand with maximum diameter of 10 millimeter and specific gravity of 2.68. Portland cement type II made by Mazandaran (Neka) Cement Factory was used in this research. Density of the mentioned cement was 3.15. In this research, Limestone powder with density of 2.7 and specific weight of 480 kg/m2 was used as filler element. Mix design that was applied in order to prepare self-consolidating concrete in this study was according to ACI R-07237. In order to measure compressive strength of hardened concrete, cubic samples of 10*10 centimeters were used (B.S 1881: Part 117). Compressive strength test using 10*10 cubic samples in days 7 and 28 was conducted. The results of this research showed that addition of fibers to self-consolidating concrete reduces its compressive strength. Also, it can be concluded from the results obtained from compressive strength test that percentage of fiber in concrete varies inversely with compressive strength, namely, increase of fiber percentage results in reduction of concrete compressive strength

کلیدواژه ها:

concrete ، self-consolidating ، artificial fibers ، strength ، mix design