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 Qualifying Items of Work for End result Specifications written by William E. Elmore and published by . This book was released on 1997 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Texas Department of Transportation (TxDOT) is presently using a quality control/quality assurance (QC/QA) specification for hot-mix asphalt concrete pavement. There is a strong interest in determining if other construction items can be converted to this type of specification. The purpose of this report is to (1) review the experiences of a large number of key states believed to be using these types of specifications, (2) review the TxDOT standard specifications in order to recommend candidates for development, and (3) develop a recommended QC/QA specification for flexible base. Of the 23 states contacted, 19 cooperated in the survey, the majority of which were willing to provide copies of their specifications. Fifteen specifications have been received. Based on the information obtained from these reviews, nine items have been recommended for consideration by TxDOT.

Download or read book Quality Assurance Guide Specification written by American Association of State Highway and Transportation Officials. Highway Subcommittee on Construction and published by . This book was released on 1996 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report along with its companion report, Implementation Manual for Quality Assurance include quality control requirements for the contractor and or supplier and quality assurance requirements for the agency. These reports consider the all encompassing concept of quality control, quality acceptance, independent assurance (I.A.) laboratory accreditation, technician training and certification, and contractor quality control plans.

Download or read book Quality Assurance in Pavement Construction written by G. J. Allen and published by ASTM International. This book was released on 1980 with total page 44 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 Review of ADOT s Quality Assurance Asphalt Concrete Specification written by Arizona. Department of Transportation and published by . This book was released on 1989 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Asphalt Paving Technology written by Carl L. Monismith and published by McGraw-Hill Companies. This book was released on 1997-06 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on asphalt paving technology, this work emphasizes quality control and quality assurance programmes in producing high-quality pavements. It combines theory and practice of asphalt paving including developments and information from the recently completed Strategic Highway Research Program which was designed to improve asphalt specifications, mix design and analysis systems.

Download or read book Superpave Mix Design written by Asphalt Institute and published by . This book was released on 2001-01-01 with total page 102 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 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 Demonstration Project 42 written by and published by . This book was released on 1980 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hot mix Asphalt HMA Quality Assurance QA Process Review written by and published by . This book was released on 2012 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Process for Development and Implementation of a Quality Assurance Specification for Asphalt Concrete written by Travis Mitchell Patrick and published by . This book was released on 1997 with total page 222 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 Development of Specification Limits for Asphalt Pavements Based on Quality Control and Quality Assurance Data written by Jian-Shiuh Chen and published by . This book was released on 2011 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt content and aggregate gradation measurements for hot-mix asphalt (HMA) concrete were collected during the 2008 construction season to develop statistics for quality control (QC) and quality assurance (QA) programs for the Taiwan Highway Bureau (THB). Data were analyzed to determine if the quality characteristics followed a normal distribution in order to compare contractor and THB measurements and to develop specification limits. The quality test data were shown to follow a normal distribution; therefore, appropriate statistics could be developed from the normally distributed data. Differences between QC and QA test results were shown to be statistically significant for some of the mix properties. QA and QC comparisons indicated that QC data were less variable and tended to have more favorable test results that would give more favorable acceptance outcomes to contractors. This is a significant finding since highway agency pay factors assume the validity of QC data. A statistical process was established to determine a typical standard deviation value by taking into account the variability of both QC and QA data. The revised specification limits were developed as construction control tools for the quality characteristics of HMA mixtures. The revised specification limits were found to be loose enough to account for material, sampling, and testing variations but still tight enough to identify manufacturing and construction variability.

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: