Evaluation of physical and mechanical properties of concrete with pili nut shell as partial replacement for coarse aggregate/ John Felix S. Awayan, Rainier Oswald V. De Castro, Takanoah I. Endo, Manuel John C. Pallones, Marionne Jeffrey B. Paredes, and Andrew G. Timbang

Includes bibliography

The negative impacts of concrete production such as to the natural resources hi led to a trend of studies looking to replace aggregates in concrete. An abundance of pi nut shell as waste and its property of being tough and hard made it a potential substitute to coarse aggregate. Previous similar studies to this research used materials that an recyclable waste and agricultural waste which are all showing promising results as partial substitute to coarse aggregate. These studies also showed a trend of acceptable percentage of replacement that would not fully affect the integrity of the concrete sample. Different testing method were performed to evaluate the performance of concrete with pili nut shell as partial replacement to its coarse aggregate. These tests are the physical and mechanical test of the concrete such a slump test, density test, compressive, splitting-tensile, and flexural test with accordance to ASTM standards of testing and acceptable values. The data gathered has led to a conclusion that pili nut shell as partial replacement to coarse aggregate shows promising potential with some samples being able to reach acceptable values of strength required by ASTM standards. The findings indicate that pili nut shell is a possible partial replacement for the coarse aggregate in concrete with limited replacement and similar studies related to this in the future should explore its on field applications.