Utilization of elephant grass as supplementary material for fiber reinforced concrete / by Ana Paula A. Aquino and Lilibeth A. Reyes.

Design Project (Bachelor of Science in Civil Engineering) Cavite State University.

Includes bibliographical references.

College of Engineering and Information Technology (CEIT), Department of Civil Engineering

AQUINO, ANA PAULA A. and REYES, LILIBETH A. Utilization of Elephant grass as Supplementary Material for Fiber Reinforced Concrete. Undergraduate Design Project. Bachelor of Science in Civil Engineering. Cavite State University, Indang, Cavite. June 2018. Adviser: Engr. Cene M. Bago.
The main objective of this study was to produce concrete using Elephant grass as fiber reinforcement. Specifically, it was undertaken to determine the effect of tensile strength of Elephant grass fiber on concrete; the compressive and flexural strength of concrete mixture with different amount of Elephant grass fibers added at 7,14 and 28 days curing period; and to determine the most economical mixture of concrete using Elephant grass as fiber reinforcement. Five different Treatments were used in this study namely: concrete with 0 percent Elephant grass fiber, concrete with 0.5 percent, 1 percent, 1.5 percent and 2 percent of Elephant grass fiber per weight of the cement were the other four Treatments. The different tests performed to determine the effects of Elephant grass fiber to the concrete were the slump test, compressive strength test and flexural strength test Based on the results obtained from the tensile strength test, Elephant grass fiber has a low tensile strength which makes the strength of concrete weaker compared with the normal concrete. Elephant grass fiber was not capable on increasing the strength of concrete due to its low tensile strength. Instead of increasing the compressive and flexural strength of concrete, it makes the concrete weaker. The compressive strength of concrete with Elephant grass fiber as reinforcement was directly proportional with the amount of Elephant grass fiber.
As the amount of fiber increases, the compressive strength of Elephant grass fiber reinforced concrete also decreases. The most economical mixture of concrete using Elephant grass as fiber reinforcement was the mixture with 1.5 percent fiber. Compared to the normal concrete, additional 1.5 percent Elephant grass fiber per weight of cement was less economical. It was not efficient to have an additional fiber on concrete because it only increases the cost of mixture, not the compressive and flexural strength. The types and amount of fiber used in the mixture affect the strength of the fiber reinforced concrete. The increase on the strength of concrete depends on the tensile properties of the fiber used. It was also observed that on 7th, 14th and 28th curing days, the compressive and flexural strength of the concrete constantly increase. With the addition of beyond 1.5 percent Elephant grass fiber, the compressive and flexural strength of concrete decreases. Therefore, as the amount of Elephant grass fiber on concrete increases, the flexural and compressive strength increases in the limit of 1.5 percent fiber per weight of the cement

Submitted to the University Library August 30, 2018 DP-608