Software Programs

Programs for Interlocking Concrete Pavements

Structural Design of Interlocking Concrete Pavements

This program enables users to design bases for interlocking concrete pavements. Users can design aggregate, cement or asphalt stabilized, or asphalt bases. The program uses the flexible pavement design methodology in the 1993 AASHTO Guide for Design of Pavement Structures. The user provides soil subgrade and drainage information, anticipated traffic loads as 18,000 lb (80 kN) axle loads up to 10 million, and the base material type. The program outputs base and subbase thicknesses. The user can change default values in the program. Program use must be accompanied by reading ICPI Tech Spec 4 Structural Design of Interlocking Concrete Pavements free on this website and/or purchase ASCE 58-10 Structural Design of Interlocking Concrete Pavement for Municipal Streets and Roadways. The program runs using metric or traditional U.S. units. Click here to download the free program in traditional U.S. customary units and here for metric units. Developed by Applied Research Associates.

Life Cycle Cost Analysis Program

The user can enter construction, maintenance costs and end-of-life costs for interlocking concrete pavement, asphalt and concrete pavements, as well as a discount rate to have the program calculate the life-cycle costs for these pavements. The software allows deterministic or probabilistic analyses of costs and outputs results in tabular and bar graph forms. Default values are provided for initial costs, maintenance costs and intervals which can be easily edited by the user to project-specific conditions. The program can be operated using metric or traditional U.S. units. Click here to download the free program. Developed by Applied Research Associates.

Pavement Condition Index Calculator

Management of pavements involves periodic condition inspection that translates distresses and severities into pavement condition ratings. This data can be used to develop a pavement condition index (PCI) from 0 to 100 that helps forecast when pavements might need maintenance. Condition surveys and development of PCIs for interlocking concrete pavements rely on ASTM E2840 Standard Practice for Pavement Condition Index Surveys for Interlocking Concrete Roads and Parking Lots. This software program provides a data collection sheet that automatically calculates the PCI for streets. This data can be input into pavement management systems. Click here to download the free program. Developed by Applied Research Associates.

Programs for Permeable Interlocking Concrete Pavements

Permeable Pavement Site Sustainability Evaluation Tool

This program provides a ranking system that rationalizes the site feasibility and selection for permeable pavement. The user answers questions that generate a score up to six prospective sites amenable, marginal or unacceptable as places for permeable pavement. Click here to download the free program. Developed by Applied Research Associates, Inc.

Permeable Design Pro for Hydrologic & Structural Design of Permeable Interlocking Concrete Pavements

Design permeable interlocking concrete pavement for pedestrian areas, parking lots, alleys and streets, the most durable and repairable permeable pavement surface. American or metric versions include an extensive documentation and help library, as well as on-screen, mouse-over advice. Software includes input error-trapping for learners. Purchase license and download the program from Program automatically updates via the Internet. Design professionals with projects may obtain the program from ICPI members and ICPI Foundation supporters. Contact ICPI for details.

Inputs: Site configuration, contributing drainage area and surface(s), slope, curve numbers and roughness; library of SCS-type rainfall events (2, 5, 10, 25, 50, 100-year) for US or from Environment Canada for Canadian projects; optional user-provided rainfall events; traffic loads (ESALs) for parking lots or streets; soil strength (MR, CBR or R-value) and infiltration rate; base/subbase aggregate gradations; underdrain(s) diameter, slope and spacing; and antecedent rainfall depths within the subbase.

Outputs: Base/subbase porosity and thicknesses based on storage hydrograph flows; storage and outflow volumes; curve numbers and runoff coefficients; structural subbase thickness  up to 1 million ESALs; CAD output cross section of design solutions with/without underdrains, exportable to project drawings. Print or save input/output reports as a pdfs and numeric hydrographs as Excel files.

Uses non-proprietary FHWA Drainage Requirements in Pavements software for hydrologic analysis (water balance); structural design based on AASHTO 1993 Guide for Design of Pavement Structures soon to be updated to UC Davis/Caltrans design tables based on full-scale load testing and mechanistic analysis as reported here and as in the ASCE/ANSI T&DI Standard Guide for Permeable Interlocking Concrete Pavements covering design, construction and maintenance.

ASTM C1781 Surface Infiltration Rate Calculator

This sheet provides input values for the formula in ASTM C1781 Standard Test Method for Surface Infiltration Rate of Permeable Unit Pavement Systems that calculates that rate in inches per hour. The test also indicates how long water stands on the surface which can indicate when cleaning should be done to prevent clogging. The sheet provides inputs for 8 lbs (5 kg) of water for the wetting step and 40 lbs (18 kg) for the testing step, thereby providing instant answers. Click here to download.