Bitumen adhesion test

All common forms of road aggregates, as long as they are dry and dust-free, will adhere to bitumen well. There is essentially no adhesion issue with bituminous construction when there is no water present. The aggregate becomes an adhesion issue when it is cold and damp. This issue can be resolved by drying the aggregate, raising the mixing temperature, and removing moisture from the aggregate. Additionally, the presence of water results in the binder being stripped from the coated aggregates. When bitumen mixture is permeable to water, problems like these arise. The adhesion of bitumen binder to an aggregate in the presence of water is arbitrarily determined by a series of laboratory procedures. IRC specifies the static immersion test, which is a straightforward test.