Strength characteristics properties of papaya leaf extract as green inhibitor in concrete

Abstract

Concrete is a combination of coarse and fine aggregates, water, and a fluid cement (cement paste) embedded with steel rod, which hardens (cure) over time and provides as reinforcement. Reinforced concrete is a type of concrete in which steel is placed so that the two elements work together to withstand stresses. The tensile, shear, and sometimes compressive stresses in a concrete structure are absorbed by the reinforcing steel rods. Steel bars in concrete corrode the concrete, reducing its strength. By establishing a protective layer over the steel bar, the addition of papaya leaf extract to steel reinforced concrete lowers the rate of corrosion. As a function, the concrete and steel bars' lifespans are extended. Bio-based papaya leaf extract was added to six different dosages of M25 grade concrete in this study: 0 %, 0.50 %, 1.00 %, 1.50 %, 2.00 %, and 2.50 % by weight of cement. Compressive, split, flexural strength test and water absorption test are all done on hardened concrete specimens after they've been cured for a certain period of time. The effects of papaya leaf extract on the mechanical characteristics of concrete were investigated with regard to those of conventional concrete. When compared with standard concrete, the compressive strength of the concrete increases by 3 % after 28 days. The split tensile strength has increased by 25 % after 28 days. After 28 days, flexural strength has improved by 10 %. And it was discovered through a water absorption test that when the proportion of papaya leaf extract increases, water absorption decreases.