Characteristics of Pervious Concrete Incorporating Cockleshell as Coarse Aggregate for Pavements

Abstract

Large amounts of marine by-product waste have emerged as a major environmental issue in many parts of the world. However, considering the limitations of natural materials, the application of this type of marine waste, such as seashells, in concrete can reduce its negative impacts on the global environment. Hence, this research study aimed to investigate the properties of pervious concrete for pavements by incorporating crushed cockleshells, a marine by-product waste, which is used as a natural coarse aggregate. The natural coarse aggregate fraction was partially (25%, 50%, and 75% by mass) replaced by cockleshells. Tests carried out were skid resistance, densities (fresh and hardened state), voids content ratio by volumetric method and image analysis, compressive and tensile strengths, permeability, and their relationships. It was observed that the density and both compressive strength and tensile strength of the lightweight pervious concrete incorporating cockleshell showed lower values compared with the control mixture, whereas voids content, water permeability, and skid resistance revealed higher performance. It is suggested that seashell waste could still be utilized as a partial aggregate at a replacement level of up to 50% for adequate compressive strength of pervious concrete for nonstructural purposes.