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Improving Durability of Asphalt Pavement Wearing Course Submerged in Water Using Candle Wax as Water Proofing Agent: An Assessment Using RSI, FDI and SDI

Enwuso Igwe, Daniel A. Nyebuchi

Abstract


Asphalt pavements are designed and constructed to meet mostly stability and durability requirements during its design life. However, durability of asphalt pavements also heavily depends on other physical parameters as good drainage facility apart from having good material mix and structural designs. In the wake of asphalt pavements not supported by good drainage measures it is very likely that these pavements will fail sooner than later. On this basis, the present study investigated how candle wax can enhance durability of asphalt pavement wearing course when there are no drainage facilities. The study was simulated in the laboratory by submerging asphalt concretes synonymous with flexible pavements and studied the effect of candle wax on these submerged concretes. Results obtained revealed that addition of candle wax to these concretes increased strength/stability and retained strength index of the concretes. Furthermore, it reduced durability index; in other words, it reduced the loss of strength in the concretes using both first durability and second durability indexes. It is thus concluded that candle wax enhances durability of asphalt pavement wearing course even though submerged in water and can increase the pavement life in general.

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References


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