APTech can step in when a municipality, private company, homeowners’ association, or other agency needs to find out why its pavement is failing prematurely and how to fix it. APTech’s highly trained engineers will conduct tests and pinpoint the reasons for the pavement failure.
APTech helps when a pavement-related situation escalates and different parties need serious answers to sort out responsibility and determine remedial actions. When you have to know who is responsible for pavement failure and how to fix it, APTech’s impartial engineers will objectively assess responsibility, recommend paths to remediation, and identify feasible repair solutions.
APTech’s senior pavement and materials engineers provide mediation between parties or expert witness testimony in trials, depositions, and other legal proceedings.
The Laughlin Air Force Base (AFB) in Del Rio, Texas is one of the largest pilot training facilities in the Air Force and the busiest airports in the United States on weekdays. Keeping its pavements in peak operational condition is very important. Therefore, when cracking of a recently reconstructed portland cement concrete transient aircraft parking apron at Laughlin AFB was observed, the Base felt it was important to assess and monitor the situation.
Working in conjunction with CH2M HILL, Inc. (CH2M HILL), APTech performed an initial apron pavement evaluation of the cracking in 2005 to establish baseline conditions. Cracking continued to develop and in 2007, and in 2008 APTech and CH2M HILL were again retained to re-inspect the area and analyze and diagnose the cause of the cracking based on updated inspection data and additional core information.
During this project APTech assisted with the pavement evaluation, provided technical expertise, and conducted data analysis, which culminated in a final report detailing the causes of the pavement deterioration.
APTech contracted with the North Carolina Department of Transportation (NCDOT) to provide assistance to the pavement management team in addressing special needs. The services provided include a pavement condition survey evaluation, the development of a pilot program to evaluate the feasibility of automated data collection for condition surveys, and an early failure evaluation.
Under the first task order, APTech conducted an independent evaluation of the NCDOT pavement condition survey procedures to determine whether the existing procedures were adequate to support the more sophisticated analysis capabilities of the new pavement management software under consideration. As part of this project, APTech collected information that was used to evaluate the current pavement condition evaluation procedures conducted by the NCDOT and requested information from several other DOTs across the country. The information acquired during this task was reviewed by the APTech team members and used to prepare a brief summary of the state of practice in pavement data collection procedures in the United States.
APTech conducted a technical review of the information obtained and then prepared a summary report that compared NCDOT survey procedures to the best practices in other states. APTech provided a subjective assessment of recommended changes that should be instituted as part of the updated pavement management procedures.
For the second task order, NCDOT wanted to consider the advantages of automated data collection, so APTech developed a testing program for the automated collection of condition data and criteria for evaluating the test results, created a request for proposal to solicit the services of potential vendors, and assisted in the evaluation of condition survey results to help the NCDOT determine the most reasonable approach for conducting its future pavement condition surveys.
NCDOT contacted APTech with a third task order when it noticed premature cracking on a highly traveled segment of an interstate highway. APTech conducted a bonded overlay pavement failure evaluation that included coring, and provided rehabilitation recommendations on a tight schedule so that the pavement could be repaired before winter.
In March 2008, APTech initiated a study for Olathe, Kansas, to develop a preventive pavement maintenance program for the city’s road network. Using pavement network inventory and condition information, APTech generated preventive maintenance treatment recommendations for every street in the city that was considered a viable candidate (based upon pavement age, treatment history, type, extent, and severity of distress). The city then prioritized the streets and selected a combination of projects for their 2009 preventive maintenance program. The implementation of the preventive maintenance program focused on maximizing the condition and life of a network of pavements while minimizing cost. The benefits of such a program include improved pavement performance, higher driver satisfaction, and increased safety for Olathe’s growing population.
In addition to generating the recommended preventive maintenance treatments for all of the city’s candidate streets, APTech also delivered a Preventive Maintenance Treatment Selection Guide. The guide provided information on the selection of the best candidate streets for preventive maintenance and information on selecting the most appropriate treatment from a variety of alternatives that can be used for preventive maintenance, including surface seals (fog, slurry, microsurfacing, chip, and cape), crack sealing/filling, thin overlay, and cold milling. The guide was intended for use by the city Public Works Department in developing future preventive maintenance programs to ensure that infrastructure improvements are functional, durable, and cost effective, in keeping with the goals of the community of Olathe.
In 2009, the City of Overland Park, Kansas began experiencing severe material loss in roughly two-thirds of the microsurfacing work performed by a local contractor in 2006. The City contracted with APTech to conduct an investigation of the failures, identify the possible causes, and serve as an expert witness in the City’s lawsuit against the Contractor.
As part of its investigation, APTech engineers inspected the microsurfacing conditions of randomly selected streets in the City’s road network and reviewed all design and construction records provided by the City, as well as all materials and construction data supplied by the Contractor. Based on this information, APTech determined many of the possible causes for the treatment failure and submitted its findings to the City’s engineers and attorneys. Under follow-up work, APTech engineers prepared detailed, comprehensive findings of the investigation, participated in pre-trial conferences, and served as an expert witness in the City’s suit against the contractor for remediation.
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