The Effect of Storage Duration on the Resistance to Marshall Stability, Rutting, and Tensile Strength of CPHMA Modified Using Candlenut Oil

Lawele granular asphalt (LGA) is an alternative road pavement material from Lawele area in Central Sulawesi, Indonesia. There is a need for a modifier to remove this asphalt and the material observed to have the potential is candlenut oil. Meanwhile, the potency of the material was tested for cold paving hot mix asbuton (CPHMA) at the normal temperature used for solidification while its performance as a modifier was further studied using Marshall, rutting, and indirect tensile strength tests. It is important to note that the Marshall test was conducted at an initial stage and the results were used as a reference to compose the mixture for further mechanical tests. The findings showed that the highest Marshall value was 725.89 kg which complies with the provisions of CPHMA. Moreover, it was discovered that the rutting and tensile strength did not have any direct relationship with the resistance to marshal. This is mainly because a longer storage duration was observed to have led to higher resistance. This means the candlenut oil has a good potential to serve as an LGA modifier. Therefore, there is a need to improve the LGA technology and value of candlenut needed for production on an industrial scale.