Download or read book Evaluation of Arkansas Quality Control Specification for Hot mix Asphalt Construction written by Joshua Arnold Cotton and published by . This book was released on 2001 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quality Assurance Specification Review for Hot Mix Asphalt and Structural Concrete written by Chuck E. Hughes and published by . This book was released on 2000 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report includes three parts: (1) Final Report for Quality Assurance Specifications Review dated May 2000; (2) Addendum to the Final Report dated December 2000; and (3) Draft Construction Manual and Inspection Guidelines dated May 2000. The study tasks included a detailed analysis of the quality assurance (QA) special provision, evaluation of Department and Contractors risks, examination of practice of using Contractors tests results for acceptance, guidelines for effective use of QA specifications by field inspection staff, need for adjustments to material specification limits, interviews with Department and Contractor personnel and the impact of recommended changes to the Contractors.
Download or read book Quality Control and Quality Assurance of Hot Mix Asphalt Construction in Delaware written by Radha Akkinepally and published by . This book was released on 2006 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the mid 60's the Federal Highway Administration began to encourage Departments of Transportation and Contractors toward the use of quality control and quality assurance (QA/QC) specifications, which are statistically based. For example, a QA specification has become an important component in organization commitment to overall quality management. This consists of several activities including: process control, acceptance, and sometimes independent assurance of product (Buttlar and Harrell, 1998). These specifications must be designed to reward good quality, and penalize poor quality. The QA specification, also called as the QA/QC specification, is a combination of end-result specifications and materials and methods specifications. The highway agency is responsible for the acceptance of the product that is produced by the contractor following or implementing quality control in order to produce a product that meets the specifications provided by the highway agency. QA specifications typically are statistically based specifications that use methods such as random sampling in which the properties of the desired products or constructions are described by appropriate statistical parameters, and lot by lot testing. These methods would help the contractor know whether or not the operations are producing the acceptable product. Specifications for the construction of asphalt pavements can be classified into propriety specifications, method-related specifications (MRS), end-result specifications (ERS), performance-related specifications (PRS) or combination of these specifications. Propriety Specification This type of specification refers to some specific product or its equivalent in its clauses; therefore, it limits the competition and often results in a cost increase. Since the buyer has to accept the product as a "black box", the buyer's risk is much higher than in the other three types of specifications Method Specification This type of specification outlines a specific material selection and construction operation process to be followed by the contractor in providing a product. Since there is no explicit product specified, this type of specification allows competition among various suppliers and contractors; but, because the buyer sets the requirements for materials and methods, the owner has to bear the responsibility of the performance. End-Result Specification The final characteristics of the product are stipulated in the end-result specification and the contractor is given considerable freedom in achieving those characteristics. It may specify a limit or range for any given material and/or construction characteristic. The risk for the contractor or agency depends on how the acceptance limits and processes are specified. Performance Related Specification (PRS) This type of specification holds the contractor responsible for the finished product's performance; thus, the contractor assumes considerable risk for the performance of the finished product. This type of specification is often used in conjunction with some type of warranty. The challenge here is to use "true" performance indicators, which may not be available for all materials and processes. Statistical acceptance specifications tend to provide a more defensible approach to specifying HMA construction than the previously used methods of specification (Muench and Mahoney, 2001).
Download or read book Recommended Performance related Specification for Hot mix Asphalt Construction written by Jon A. Epps and published by Transportation Research Board. This book was released on 2002 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quality Management of Hot Mix Asphalt written by ASTM Committee D-4 on Road and Paving Materials and published by ASTM International. This book was released on 1996 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Statistically based Methods to Determine QC QA Testing Levels for Hot mix Asphalt Construction written by Robert L. Schmitt and published by . This book was released on 1998 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 10th International Conference on Maintenance and Rehabilitation of Pavements written by Paulo Pereira and published by Springer Nature. This book was released on with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quality Control and Quality Assurance of Hot Mix Asphalt Construction in Delaware written by Radha Akkinepally and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a study where the objective is the development of an appropriate statistical acceptance procedure for the Delaware Department of Transportation. DELDOT's modification of its specifications for the acceptance of Hot Mix Asphalt (HMA) in order to incorporate quality assurance concepts lead to requirements such as the emphasis laid on the HMA producer in terms of quality control activities such as performing component material tests, tracking test results on control charts and following the plan developed by DELDOT. The incorporation of new statistically based acceptance specifications used new criteria for acceptance rather than the previous methods of minimum test result requirements for numerous criteria. After the statistical acceptance procedure was reviewed and used for quantifying and evaluating the DELDOT's statistical plan, a comparative analysis between the developed procedure and the FAA and FHWA procedure was done for achieving the objective and providing recommendations and new composite pay factors were developed.
Download or read book A First Year Summary of the Arkansas Hot Mix Asphalt Technician Certification Program written by KD. Hall and published by . This book was released on 1999 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: In response to Federal Aid requirements (23 CFR 637B, October 5, 1995) regarding certification of roadway technicians for quality control/quality assurance (QC/QA) testing, the Arkansas State Highway and Transportation Department (AHTD) sponsored the development of the Center for Training Transportation Professionals (CTTP) at the University of Arkansas, Fayetteville. Training and certification programs executed by CTTP include Hot-Mix Asphalt Field Technician (HMAC Tech) among others. Prerequisite to the HMAC Tech program is a training course in aggregates. The HMAC Tech program includes instruction and testing (written and performance) in the areas of sampling, gyratory compaction, volumetric analysis, asphalt content, and field density. As of November 1, 1998 eight HMAC Tech courses have been completed with a total of 150 persons attending, including 67 AHTD and 83 contractor employees. Of the 150 persons attending, 10 were unsuccessful, for a 93.3 percent pass rate. Student evaluations and anecdotal evidence indicate the program to be a resounding success.
Download or read book Effectiveness Comparison of TxDOT Quality Control quality Assurance and Method Specifications written by Mansour Solaimanian and published by . This book was released on 1998 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: This purpose of this study was to evaluate the quality of the hot mix asphalt concrete produced under quality control/quality assurance (QC/QA) specification item 3063. During the first phase of this project, conducted between September 1996 and February 1997, an extensive amount of technical information and numerical information was gathered and analyzed. During the second phase of this project, various other activities were carried out, including a survey of other states to assess their approach in developing and implementing QC/QA specifications, a physical survey of QC/QA and non-QC/QA specification projects in Texas, and a limited evaluation of the cost of the projects. This report presents the results, findings, conclusions, and recommendations based on the collected information and on the work performed during the course of this research program.
Download or read book Modern Approaches To Quality Control written by Ahmed Badr Eldin and published by BoD – Books on Demand. This book was released on 2011-11-09 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapid advance have been made in the last decade in the quality control procedures and techniques, most of the existing books try to cover specific techniques with all of their details. The aim of this book is to demonstrate quality control processes in a variety of areas, ranging from pharmaceutical and medical fields to construction engineering and data quality. A wide range of techniques and procedures have been covered.
Download or read book Evaluation of the Nonnuclear Density Gauge for Quality Control of Hot mix Asphalt written by John W. Henault and published by . This book was released on 2010 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Initial Evaluation of the WSDOT Quality Assurance Specification for Asphalt Concrete written by Stephen J. Markey and published by . This book was released on 1994 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Department of Transportation and Related Agencies Appropriations for 1983 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Dept. of Transportation and Related Agencies Appropriations and published by . This book was released on 1982 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Assessment of WSDOT s Hot mix Asphalt Quality Control and Assurance Requirements written by Kim A. WIlloughby and published by . This book was released on 2007 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation and Modification of a Statistical Specification for Hot Mix written by JB. Metcalf and published by . This book was released on 1996 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Louisiana's current statistically based specification system was initiated in 1967. This system was based upon contractor quality control and department acceptance testing using known variability concepts. A materials data base was also initiated at that time to archive materials test results and information. Since inception of the data base and system, major changes have been incorporated into the standard specifications. Further, there have been advances in equipment and operational control devices that can further reduce construction and test variation.
Download or read book Comparing the Volumetric and Mechanical Properties of Laboratory and Field Specimens of Asphalt Concrete written by Louay Nadhim Mohammad and published by . This book was released on 2016 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reports document research that was performed to (1) determine causes of variability and tolerances for volumetric and mechanical properties of dense-graded asphalt mixtures measured within and among the three specimen types; and (2) propose a practice for state departments of transportation to incorporate these results in specifications and criteria for quality assurance, mix design verification or validation, and structural design and forensic studies. The research was conducted in two phases. In Phase I, datasets of laboratory and field test data were collected and pooled in a meta-analysis in an attempt to determine levels of variability in asphalt mixtures and the factors causing variability among and between the three specimen types. Despite the inclusion of 25 extensive datasets representing roughly 8,000 individual mixtures in the meta-analysis, the results of the analysis were inconclusive. Phase II was then undertaken--a program testing specimens from paving projects across the United States to quantify the effects of process-based factors on the variability of volumetric and mechanical properties of the specimen types. The key outcome of the research is a proposed practice for evaluating the cause and magnitude of variability within and among the three specimen types. In addition, tolerances of volumetric and conversion factors between the three specimen types of mechanical properties evaluated are proposed based on the average difference between specimen comparisons for the mixtures evaluated in Phase II. Agencies may use these proposed values to evaluate and adjust their current tolerances.
