Assessing asphalt mixture moisture susceptibility through intrinsic adhesion, bitumen stripping and mechanical damage

Abstract

Durability is one of the most important properties of an asphalt mixture. A key factor affecting the durability of asphalt pavements is moisture damage. Moisture damage is generally considered to be the result of two main mechanisms; the loss of adhesion between bitumen and aggregate and the loss of cohesion within the mixture.

Influence of waxes on adhesion properties of bituminous binders

“…(5), (7) and (8). For an asphalt mixture to be durable and have a relatively low sensitivity to moisture, it is desirable that the work of adhesion, DG a AB , between the asphalt binder and the aggregate be as high as possible.…”

“…The presence of moisture results in a degradation of the mechanical properties of the asphalt mixture, i.e. loss of stiffness and mechanical strength, which ultimately leads to the failure of the road structure [8].…”

Semi-automatic Evaluation of the Degree of Bitumen Coverage on Bitumen-Coated Aggregates

“…The presence of moisture results in a degradation of the mechanical properties of the asphalt mixture, i.e. loss of stiffness and mechanical strength, which ultimately leads to the failure of the road structure (Grenfell et al 2014). Many researchers have recognized that the replacement of bitumen film from the aggregate surface by water, referred to as stripping, is linked to interfacial tension relations of these materials (Hefer 2004;Bhasin 2006).…”

Chemically modified bitumens with enhanced rheology and adhesion properties to siliceous aggregates

“…They are composed largely of silicon and oxygen, with the addition of ions such as aluminium, magnesium, iron and calcium. Due to the acidic nature of bitumen, this type of siliceous aggregate is well known for its poor field moisture damage performance [27,28]. Before being used, the aggregates were washed with deionized water and then dried in an oven at 105 ± 5 ºC overnight.…”