• Empirical Design Procedures - Based on observed performance '72, '86/'93 AASHTO Design Procedures • Mechanistic-Empirical Design Procedures ... asphalt overlay. • Long service life - High PSI. • Lower user & engineering costs. • Rut free 100 140 180 220 260 300 02 46 8
the early tasks in developing the Design of Concrete Overlays Using Existing Methodologies, a guide that will provide straightforward and simple guidance for concrete overlay design. Under this effort, five different methods are being reviewed. An overview of the first three methods is presented here. The remaining two design procedures are
The Colorado Department of Transportation method for bonded concrete overlays of asphalt pavements. The guide discusses specific design assumptions, deficiencies, and strengths inherent in each method, as well as step-by-step design ... This guide is intended to be used in conjunction with the corresponding design procedures' documentation ...
design inputs in the FAA HMA overlay design procedures, discusses the general characterization of an existing pavement and repair and mitigation techniques in the design of HMA overlays, and provides recommendations for potential clarifications in the design procedure.
Arkansas and Texas. The procedure is incorporated into a computer program (ARKRC-2) for both existing pavement evaluation and overlay design. It con siders asphalt concrete overlays and several techniques of reflection cracking control that may accompany overlay placement. These …
Asphalt Overlay Design Procedures. Transportation Research Board, NCHRP Synthesis 116, December 1984. Sherman, G. Minimizing Reflection Cracking of Pavement Overlays. Transportation Research Board, NCHRP Synthesis 92, September 1982. Germann, F.P. and R. L. Lytton. Methodology for Predicting the Reflection Cracking Life of Asphalt Concrete ...
be of particular importance are 1) overlay design procedures, 2) materials selection and 3) construction operations. This document provides information to aid the paving engineer responsible for designing an asphalt concrete overlay containing a fabric interlayer installed to reduce or delay reflection cracking.
vation by thin asphalt overlays, materials selection and mix design, construction practices including quality control, and the performance history of thin asphalt overlays. Thin asphalt overlays as used in this guide are surface mixes of 1.5 inches or less placed on a …
developed and adopted its own overlay design procedure in 1984 termed Structural Overlay Design for Arizona (SODA). The purpose of this manual revision is to present guidance on how ADOT currently uses the 1993 AASHTO Guide for the Design of Pavement Structures to design new pavements, and SODA to design asphalt overlays.
Category: Pavements, Asphalt. Page: 66. View: 559. This synthesis will be of interest to pavement designers and others concerned with the design of asphalt concrete overlays. Information is presented on reasons for overlaying a pavement and on the vaious methods available for design of an asphalt overlay.
NEW ASPHALT OVERLAY DESIGN PROCEDURE. In Victoria, the design of asphalt overlays had for many years been based on a procedure which used maximum deflection measured under a standard wheel load, as its primary input. Some limitations to this procedure started to become obvious in the 1970's, with premature fatigue cracking of a number of ...
Overlays (either structural or non-structural) make up a large portion of the roadway paving done today.The degree of surface preparation for an overlay is dependent on the condition and type of the existing pavement. Generally, the existing pavement should be structurally sound, level, clean and capable of bonding to the overlay.
The overlay design procedures were developed to maintain consistency with the current WisDOT practice of new flexible pavement design based on the 1972 AASHO design equation. 17. Key Words HMA Pavements, Falling Weight Deflectometer, Effective Structural Number, Overlay Design 18. Distribution Statement No restriction.
The composite overlay design procedure currently used by ODOT sometimes produces very large overlay thicknesses that are deemed structurally unnecessary, especially for composite pavements already with thick asphalt overlays. This study was initiated to investigate the cause(s) and to develop a revised procedure.
