AN EXPERIMENTAL STUDY ON STRENGTH PROPERTIES OF TABBY CONCRETE WITH SEA SHELL COARSE AGGREGATE
Bille Pradeepkumar, Dr.Vaishali G Ghorpade, Dr.H.Sudarsana Rao
MTech Student (Structural Engineering), Civil Engineering Department, JNTUA College Of Engineering, Anantapur, Andhra Pradesh, India
Professor In Civil Engineering Department, JNTUA College Of Engineering, Anantapur, Andhra Pradesh, India
Professor In Civil Engineering Department, JNTUA College Of Engineering, Anantapur, Andhra Pradesh, India
billepradeepkumar1@gmail.com, ghorpadevaishali1@gmail.com, sudarsanarao123@gmail.com
Abstract:
A type of concrete known as “tabby” is created by converting crushed oyster shells into lime by burning them and blending them with other materials, such as water and sand. Innovative materials made with natural resources have been developed in response to resource depletion and environmental damage concerns. Environmentally, the massive exploitation of natural aggregates causes depletion, while the manufacture of cement generates pollution. This scenario has an impact on the global ecological system. As civil engineers, we would like to replace the frequently used building materials of coarse aggregate and cement with seashells and oyster shell powder, respectively. Seashells and oysters are the dead remains of aquatic organisms. The rough texture of seashell makes it appropriate for partial coarse aggregate replacement, providing a cost-effective substitute for conventional materials like gravel. In this study, tests will be performed on normal concrete as well as seashell-concrete mixtures. The relative portion of coarse aggregate partially replaced with seashell ranges from 0%,5%, 10%, 15%, to 20%. Further, find the optimum % of sea shells(SS). Then with that optimum % of SS, the cement is replaced with oyster shell(OSP) powder in percentages of 0%, 10%, 20%, 30%, and 40%. The hardened and fresh characteristics of concrete will be examined, including compressive strength, flexural strength, tensile strength, and workability. The experimental investigation will be carried out with an M20 mix, and testing will be carried out in accordance with the prescribed methods by applicable IS codes. The M20 grading mix was designed using the IS: 10262-2009 standard results of this study help to understand how tabby concrete behaves, it might be recommended as a possible substitute construction material for low-cost house construction, particularly in coastal areas. Similarly, the study gives us the conclusion that 15% of sea shells(SS) and 20% of Oyster shells powder(OSP) replacement is optimum with an increase of compressive strength, Split tensile strength, and flexural strength by 15.8%, 25%, and 35.5% respectively for the 28 days curing period. Concrete’s workability is also affected.
Keywords: Tabby concrete, Oyster shell powder, Sea shells, Ecological system, Aquatic organisms.