In a significant advancement for sustainable urban development, researchers from Curtin University Malaysia have unveiled the promising effects of a novel polycarboxylate-lignosulfonate superplasticizer (PLS) on the properties of pervious concrete (PC). This innovative study, led by Ehsan Teymouri, investigates how varying concentrations of PLS, alongside adjustments in water and cement content, can enhance the mechanical and physical characteristics of pervious concrete, making it a more viable option for urban applications.
Pervious concrete, known for its ability to allow water to permeate through its surface, is increasingly being recognized as a solution to urban flooding and heat island effects. Teymouri and his team meticulously designed and tested 17 different mixtures, varying the PLS content from 0.10% to 1.00% of the cement weight, and adjusting the water-to-cement ratios. The results were compelling: as the proportion of PLS, water, and cement increased, so did the compressive strength of the concrete at various curing ages, reaching an impressive maximum of 18.35 MPa.
“The findings suggest that by optimizing the PLS content, we can significantly enhance the strength of pervious concrete while still maintaining its essential permeability and porosity,” Teymouri stated. This balance is crucial, as the structural integrity of pavements in urban areas must coexist with their ability to manage stormwater effectively.
The study revealed that the water content had a particularly pronounced effect on compressive strength, especially within a narrow range of water-to-cement ratios. This insight could lead to more precise formulations of pervious concrete, tailored to specific urban environments and their unique demands.
Moreover, the research highlights a direct correlation between the increase in cementitious paste thickness and the overall strength of the concrete. This relationship not only suggests a path towards stronger pavements but also indicates the potential for reduced maintenance costs over time—a significant consideration for city planners and construction firms alike.
Teymouri’s work opens up new possibilities for the construction sector, particularly in urban planning, where sustainable materials are in high demand. As cities grapple with environmental challenges, pervious concrete could become a key player in creating green spaces, sidewalks, and light-traffic pavements that mitigate the impacts of urbanization.
Published in the ‘Journal of Rehabilitation in Civil Engineering’, this research underscores the importance of innovative materials in the quest for sustainable infrastructure. As the construction industry continues to evolve, studies like Teymouri’s pave the way for smarter, more resilient urban environments. For more information on this research and the work being done at Curtin University Malaysia, you can visit Curtin University Malaysia.