DefinePK

Abstract

The demand for natural sand in the construction industry has consecutively increased resulting in the reduction of sources and an increase in price. Thus, an increased need to identify a suitable substitute that is eco- friendly and inexpensive has emerged, which boosted the usage of quarry dust as fine aggregate in concrete. Most of the studies on the usage of quarry dust as hundred percent substitute were carried out to judge the properties of fresh concrete and strength properties. In this paper, an experimental study dealing with the strength and corrosion resistance behavior of various integral type corrosion inhibitors namely Triethanolamine, Diethanolamine, Diethylamine, Calcium Nitrite and Sodium Nitrate at the dosage of 1%, 2%, 3% and 4% by weight of cement in concrete containing quarry dust as fine aggregate is carried out. Integral inhibitors are liquids or solids that are batched and mixed with the other concrete ingredients as a preventive measure for new construction or repair work. The influence of these inhibitors was evaluated using various electrochemical techniques such as Rapid Chloride Penetration Test (RCPT), Accelerated corrosion test, A. C. impedance measurement and Gravimetric weight loss measurement. The mechanical properties such as compressive strength, flexural strength, spilt tensile strength and bond strength in addition to water absorption were also studied and the optimum dosage of inhibitors was determined individually. Results herein revealed that replacement of sand by quarry dust increases the strength of the concrete; with addition of inhibitor it offers lower permeability and greater density which enable it to provide better resistance to corrosion and durability in adverse environment.