Inhibitive Effect of Organic Inhibitors in Concrete Containing Quarry Dust as Fine Aggregate

Devi M

Abstract


Concrete is the widely used building material in the world. River sand has been the most popular choice for the fine aggregate in concrete in the past, but overuse of the material has led to environmental concerns, reduction of sources and an increase in price. Quarry dust has been proposed as an alternative to river sand that gives additional benefit to concrete. The objective of this work is to study the strength and corrosion resistive properties of concrete containing quarry dust as fine aggregate along with organic inhibitors namely Triethanolamine and Diethanolamine at 1%, 2%, 3% and 4% by weight of cement. The specimens were tested for compressive strength, split tensile strength, flexural strength, and bond strength in addition to water absorption. The resistance to corrosion is evaluated based on the performance of the concrete for the penetration of chloride ions by means of Polarization Technique, Rapid Chloride Penetration Test (RCPT) and Gravimetric weight loss method. From the results obtained, it is found that replacement of sand by well graded quarry dust along with super plasticizer increases the strength of concrete; with the addition of inhibitors it offers very good resistance against chemical attack and increases corrosion resistance in addition to overall properties of concrete. The optimum percentage addition of the organic inhibitors by weight of cement in concrete containing quarry dust as fine aggregate was also determined.

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