Evaluation of steel fiber reinforced concrete beam test results based on the real fiber distribution

  Péter Károly Juhász

The standard test methods of FRC (Fiber Reinforced Concrete) are bending beam tests. Due to the random distribution of the fibers there could be a big dispersion in the results. This large dispersion could be decreased by increasing the number of specimens and/or the area of the representative cross section. In this article the possibility of decreasing the dispersion is researched with a method based on the real fiber distribution. The added fibers increase the residual flexural strength of the concrete, which is mainly influenced by the number of fibers on the cracked section, the distance of the intersection point of the fiber and the cracked section from the neutral axes, the anchorage length of the fiber and the angle between the fiber and the cracked section. From this data only the first two could be measured relatively easily and accurately. The number of fibers crossing the cracked section could be calculated by using mathematic statistics. By knowing the test results and the corresponding location of the fibers the result of the ideal distribution could be forecasted. By applying this method the dispersion caused by improper mixing may be avoided. In this article this method is being presented and verified by large number of test results.

Keywords- Fiber reinforced concrete, Fiber distribution, Bending beam test, Evaluation of test results

Unique Identification Number - IJEDR1503114
Page Number(s) - 1-7
Pubished in - Volume 3 | Issue 3 | September 2015
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  Péter Károly Juhász,   "Evaluation of steel fiber reinforced concrete beam test results based on the real fiber distribution", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.3, Issue 3, pp.1-7, September 2015, Available at :http://www.ijedr.org/papers/IJEDR1503114.pdf