Recipient: Applied Research Associates, Inc.
Grant: $48,430 PI: David K. Hein, P. Eng.
Completion: 2019
Project Summary: 17
Background and Need
Permeable Design Pro (PDP) software was initially released in 2008. The program includes hydrologic and structural design models for permeable interlocking concrete pavement (PICP). A water balance model is used for hydrologic design based on the U.S. Federal Highway Administration’s (non-proprietary) Drainage Requirements in Pavements program. Structural design was based on the flexible pavement design methods in the 1993 AASHTO Guide for Design of Pavement Structures. This design method for impervious flexible pavements was adopted for use with PICP by ICPI in 2011.
In 2014, the ICPI Foundation received a research report from the University of California Pavement Research Center (UCRC) with revised subbase thickness design tables for permeable interlocking concrete pavement (PICP). The revisions were based on mechanistic modeling and full-scale load testing by UCPRC. The tables were included in ASCE 68-18 Permeable Interlocking Concrete Pavement, in Caltrans permeable pavement design guidance, and in ICPIs PICP manual.
The UCPRC research resulted in revising ICPIs subbase thickness design tables in 2016. UCPRC validated the AASHTO method but provided more efficient (thinner) subbase cross sections, especially in semi-arid regions and over high infiltration soils.