Feasibility of Green Mussel (Perna viridis), Subtrigonal Oyster (Crassostrea malabonensis), and Blue Swimmer Crab (Portunus pelagicus) Crushed Shells as Additive in Strengthening the Hollow Blocks

Abstract

INTRODUCTION

The researchers conducted the study about the feasibility of green mussel (Perna viridis), subtrigonal oyster (Crassostrea malabonensis) and blue swimmer crab (Portunus pelagicus) as an additive in strengthening the hollow blocks. Different testing is conducted to obtain the objectives.

METHODS

The researcher gathered the shells. Crushed and mixed to the cement and sand for the sample hollow blocks. There were 2 treatments and each had 3 replicates. First, it contained 25% crushed shells, 40% cement, and 35% sand. For control, 50% sand and 50% cement. It underwent the drying process and proceeded to test inFPRDI-DOST Los Baños, Laguna.

RESULTS

As a result of the laboratory testing, which included compressive strength, water absorption, and modulus of rupture, we found out that the crushed shells cannot strengthen the hollow blocks. Therefore, the said shells do not have many characteristics of being hard. This shell has strength, but it takes time to learn and study its value.

DISCUSSIONS

The result discussed the feasibility of the said crushed shell as an additive on hollow blocks. It contains different content such as calcium carbonate and limestone that strengthens and lower the water absorption level of the hollow blocks. The crushing of shells is one of the ways of strengthening concrete as the municipality innovates along with the technology.