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Flexible pavement design methods based on elastic theories require as input the elastic properties of the pavement materials. In particular the tensile properties of the pavement are of great concern in order to have sustainable and durable pavement during its useful life over the design period. However, determining the tensile properties of flexible pavement is one that has gained interest over the years. The present study used two forms of indirect tensile testing techniques (split cylinder and double punch) to determine tensile behaviour of asphalt concrete mixes synonymous with flexible pavement under loading for a rubber latex modified concrete. The results revealed that tensile strength of the asphalt concretes from the split cylinder test increased with increasing rubber latex content to a threshold value of 1.5% rubber latex content which was same for results from double punch test. However, the addition of rubber latex at this threshold value produced a 113% increase in the tensile strength of the asphalt concretes from split cylinder test and 133% increase in the tensile strength of the asphalt concretes from double punch test. Lastly, the results revealed that tensile strength from split cylinder test generally produced higher stress resistance than tensile strength from double punch test.

iosr journal of mechanical and civil engineering

Laboratory Investigation of The Contributions of Rubber Latex to Tensile Strength of Hot Mix Asphalt Concrete Using Split Cylinder and Double Punch Tests