To Analyze Bond Strength between Dowel Bar and Blended Pavement Quality Concrete

Abstract

This present paper discusses bond strength between Reinforced steel dowel bars, tie bars, and three types of pavement quality concrete. The first type of concrete is base on the conventional concrete method used in regular practice. Second and third types of concrete are prepare - the second type with a blending of two preset mixes of the same grade of concrete mix type term known as selfing concrete. The third type with a mixing of two preset of the blends is of different concrete mix types term known as a crossing. Time lag considers from the time of mixing of preset concrete. Bond strength was measured using the pull-out test. The results of an experimental study deformed dowel of 25mm, 32mm diameter with concrete strength of 40MPa & 50 MPa. Usually, crossing method of remixing is considering to have a better bond with steel in comparison with conventional method concrete. The relationship between remix concrete and steel is tough to evaluate. Applying crossing technique to the existing partially set concrete at various time lags, the tremendous increase in bond strength as compared to Selfing. The result is essential not only for the evaluation of bond strength between steel and concrete of pavement but also for the development of selfed and crossed mix concrete theory. Applying crossing technique to the existing partially set concrete at various time lags, the tremendous increase in Bond strength as compared to Selfing.