Assessment of Infiltration in Modified Block Pavements: Integrating Pervious Concrete for Innovative Pavement Construction

Abstract

The block pavement technique is economical and requires less maintenance than conventional pavement techniques. However, it has drawbacks, such as water logging issues in heavy rainfall areas due to the absence of camber, unlike traditional road pavements. This study presents a comprehensive structural evaluation of modified block pavement (MBP), aimed at enhancing infiltration rates without compromising load-bearing capacities. The MBP has been developed by improvement in the surface layer by merger of pervious concrete and plain cement concrete (PCC) paving blocks. Modified blocks with circular and square shape of holes filled with pervious concrete gradation have been used for infiltration. The methodology involved testing the compressive strength of PCC blocks for mechanical properties, using the double ring infiltrometer (DRIT) to measure infiltration rates, and performing falling weight deflectometer (FWD) tests to assess structural integrity. The DRIT shows that the circular hole filler between the PCC blocks shows the highest infiltration rate of 25.36 cm/h compared to square holes and joints between the blocks. The FWD test results state a gradual decrement in deflection with offset from loading. Looking forward, this research lays the groundwork for the future development of urban pavements that can mitigate flooding, enhance water management, and contribute to more sustainable infrastructure. The study presents an innovative solution for addressing water logging issues in block pavements. By merging pervious concrete with plain cement concrete paving blocks, the modified block pavement (MBP) enhances infiltration rates while maintaining structural integrity. This research is particularly relevant for areas prone to heavy rainfall, where traditional block pavements often suffer from water accumulation. The enhanced infiltration properties of MBP can mitigate flooding, improve water management, and contribute to sustainable urban environments. The findings suggest that MBP can be a cost-effective, scalable solution for small to medium-sized projects such as parking lots, pedestrian pathways, and low-traffic roads. Additionally, the study offers insights into optimizing pavement design to balance permeability and durability, which is crucial for practitioners seeking to implement sustainable and resilient pavement systems. This research provides a practical and innovative approach to pavement construction, addressing a common challenge in high rainfall areas and supporting the development of more sustainable infrastructure.