The study investigates the use of coconut husk-fiber as a sustainable and environmentally friendly reinforcing material in concrete. Fibers, a renewable resource, can improve concrete's mechanical characteristics while lowering its environmental effect. The experiment entailed creating concrete mixtures with varied fiber weights and testing their Compressive strength.

The study involved creating five mixtures of cylindrical molds, with varying coconut husk fiber weights in different days of curing, 14 and 28 days: 0 gram (Control), 25 grams (Mixture A), 50 grams (Mixture B), 75 grams (Mixture C), and 100 grams (Mixture D). The samples were tested using Universal Testing machine (UTM) to obtain their compressive strength. based on the result, samples with 0 gram of coconut husk-fiber from 14 and 28 days were noted to be smaller than those samples with coconut husk-fiber. With 75 grams of coconut husk-fiber, sample Mixture C from 28 days of curing attained the highest compressive strength, reaching its maximum compressive strength of 22.89 MPa with an outstanding axial load of 185.61 kN. Comparing it to the control sample on the same day of curing revealed an 86.32 percent in the compressive strength of sample Mixture C. The compressive strength decreased to Mixture D both 14 and 28 days of curing despite an increase in coconut husk-fiber weight compared to Mixture C.

The findings revealed that adding coconut husk fibers considerably increased the strength and workability of the concrete but there's an optimal weight for maximizing compressive strength, beyond which further additions may not yield significant improvements or have negative effects.

Keywords: Coconut Husk-Fiber, Compressive Strength, Reinforcement Agent

Research paper (Bachelor of Science in Civil Engineering - Structural Engineering)

Includes bibliographical references and appendices