Ziccarelli Maurizio
Engineering Department, University of Palermo, Viale delle Scienze Edificio 8, 90128 Palermo, Italy.
Materials (Basel). 2025 Apr 23;18(9):1909. doi: 10.3390/ma18091909.
This paper presents a comprehensive experimental study on the mix design and performance of permeable concrete for geotechnical applications, focusing on its hydraulic conductivity, durability, and filter properties. Characterized by high porosity and minimal or no fine aggregates, classical pervious concretes are effectively utilized in various civil and environmental engineering applications, including drainage systems and erosion control. This research examines the influence of the particle size distribution of aggregates on the filter properties of permeable concrete for applications in geotechnical engineering (draining piles, deep trench drains, and draining backfill). It emphasizes the importance of resistance to clogging to maintain adequate residual hydraulic conductivity and to prevent the internal erosion of soils into which permeable concrete drains are installed. The experimental results indicate that including sand in the aggregates strongly enhances the filtering capacity of pervious concrete. These findings suggest that if the mix design of permeable concrete is developed considering the grain size distribution of the base soils, the concrete will meet long-term drainage requirements (sufficient residual hydraulic conductivity), exhibit good resistance to physical clogging, provide excellent protection for the base soils against internal erosion, and contribute to the overall stability of geotechnical systems.
本文针对岩土工程应用中透水混凝土的配合比设计和性能展开了全面的试验研究，重点关注其水力传导性、耐久性和过滤性能。典型的透水混凝土具有高孔隙率且极少或不含细集料的特点，已在包括排水系统和侵蚀控制在内的各种土木与环境工程应用中得到有效利用。本研究考察了集料粒径分布对用于岩土工程（排水桩、深沟排水和排水回填）的透水混凝土过滤性能的影响。强调了抗堵塞能力对于维持足够的残余水力传导性以及防止土壤向安装有透水混凝土排水管的区域内部侵蚀的重要性。试验结果表明，在集料中加入沙子可显著提高透水混凝土的过滤能力。这些研究结果表明，如果在透水混凝土的配合比设计中考虑基础土壤的粒度分布，那么这种混凝土将满足长期排水要求（足够的残余水力传导性），表现出良好的抗物理堵塞能力，为基础土壤提供出色的内部侵蚀防护，并有助于岩土工程系统的整体稳定性。
