Determining the Role of Inorganic Inhibitors on the Strength and Corrosion Resistive Properties of Quarry Dust Concrete

This chapter highlights the role of inorganic inhibitors on the strength and corrosion resistive properties of quarry dust concrete. Concrete plays a very important role in the construction industry. It is widely used in the worldwide due to its durability, versatility and low cost. Now a days the utilization and consumption of natural aggregates and cement as largest concrete component is rapidly and constantly increasing in the production of concrete. Quarry dust is in high demand for concrete production since natural sand is increasingly scarce and expensive. Experimental work has been carried out with Calcium Nitrite, Calcium Nitrate and Sodium Nitrate as corrosion inhibitors at the dosage of 1%, 2%, 3% and 4% by weight of cement. The effectiveness of these inorganic inhibitors was studied using various electrochemical techniques such as Rapid Chloride Penetration Test (RCPT), Accelerated corrosion test, A.C. impedance measurement and Gravimetric weight loss measurement. Quarry dust concrete can perform better by including inorganic corrosion inhibitors, which can help to alleviate this problem. Several advantages can be realized by incorporating inorganic corrosion inhibitors into the concrete mixture or by coating the surface of the hardened concrete with them. In addition to water absorption, mechanical parameters such as compressive strength, flexural strength, spilt tensile strength, and bond strength were investigated, and the optimum percentage addition of each inhibitor was identified. The results show that replacing sand with quarry dust increases the strength of the concrete; with the addition of an inhibitor, it offers lower permeability and more density, allowing it to give improved corrosion resistance and endurance in harsh environments.