Effect of Porosity and Past Thickness on the Performance of Pervious Concrete

Abstract

Pervious concrete is widely used today, because it allows water to seep through its pore structure and its proper mechanical strength. The understanding of its properties allows the design of mixtures with better performance, therefore, in this article an analysis of the thickness of the paste surrounding the coarse aggregate is developed and its correlation with mechanical properties, porosity and permeability is evaluated. The size distribution of internal pores is studied and a comparison between the porosity measured conventionally and by image analysis is made. Methods developed by other authors for the determination of paste thickness are verified and new procedures are developed for a more precise porosity analysis.