Performance Report on Jointed Concrete Pavement Repair Strategies in Texas

Performance Report on Jointed Concrete Pavement Repair Strategies in Texas
Author: Tom Scullion
Publisher:
Total Pages: 130
Release: 2004
Genre: Pavements, Concrete
ISBN:

Project 0-4517 was established to summarize the results from the Lufkin experiment on US 59 and to develop statewide guidelines on how to select rehabilitation strategies for jointed concrete pavements (JCP). This year 1 report reviews the performance of the six experimental sections on US 59 and makes recommendations for statewide implementation. The best performing section in Lufkin was the flexible base overlay, which involved placing high-quality crushed limestone directly over the JCP followed by an underseal and thin asphalt overlay. This was also one of the least expensive treatments used in the experiment. The large stone mix also gave good performance, but the crack and seat and full-depth repair techniques did not perform well. A forensic investigation was conducted to attempt to explain the variation in treatment performance. To complement the Lufkin results, a review is also presented of the performance of other JCP rehabilitation techniques recently evaluated by TxDOT districts. An evaluation of crack retarding asphalt layers (Strata(R)), grid layers (GlasGrid(R)) and slab fracturing techniques is also included in the report.

Cost/benefit and Risk Assessment Procedure for the Product Evaluation Program: Product evaluation model, final report

Cost/benefit and Risk Assessment Procedure for the Product Evaluation Program: Product evaluation model, final report
Author: David Lewis
Publisher:
Total Pages: 96
Release: 1995
Genre: Highway departments
ISBN:

The Product Evaluation Model (PEM) is designed to enable the Product Resource Investment Deployment and Evaluation (PRIDE) program of the Arizona Department of Transportation (ADOT) to determine the likelihood that a new product is a worthwhile investment from an economic point of view, namely that its benefits outweigh its costs. The model defines characteristics, (or "attributes"), associated with products, utilizes their appropriate units of measure (metrics) and translates these product characteristics into the estimated costs and benefits that occur over a user-defined analysis period. The main feature of the model is to measure the relative change in metrics that occurs with the use of a new product and to forecast the net present value (NPV), or the discounted, present day value of all benefits minus all costs, associated with this change. The resulting estimate of economic benefits allows transportation officials to rank or choose among alternative products based on economic criteria. This volume is the second in a series of two. Volume I is the final project report, containing information on the technical background, analytic approach and verification of the PEM