Development Of Statistically Based Methods To Determine Qc Qa Testing Levels For Hot Mix Asphalt Construction
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Development Of Statistically Based Methods To Determine Qc Qa Testing Levels For Hot Mix Asphalt Construction
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Author : Robert L. Schmitt
language : en
Publisher:
Release Date : 1998
Development Of Statistically Based Methods To Determine Qc Qa Testing Levels For Hot Mix Asphalt Construction written by Robert L. Schmitt and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Development Of Specification Limits For Asphalt Pavements Based On Quality Control And Quality Assurance Data
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Author : Jian-Shiuh Chen
language : en
Publisher:
Release Date : 2011
Development Of Specification Limits For Asphalt Pavements Based On Quality Control And Quality Assurance Data written by Jian-Shiuh Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Acceptance decision categories.
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.
Modern Approaches To Quality Control
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Author : Ahmed Badr Eldin
language : en
Publisher: BoD – Books on Demand
Release Date : 2011-11-09
Modern Approaches To Quality Control written by Ahmed Badr Eldin and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-11-09 with Technology & Engineering categories.
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.
Quality Management Of Hot Mix Asphalt
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Author : ASTM Committee D-4 on Road and Paving Materials
language : en
Publisher: ASTM International
Release Date : 1996
Quality Management Of Hot Mix Asphalt written by ASTM Committee D-4 on Road and Paving Materials and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Asphalt categories.
Quality Control And Quality Assurance Of Hot Mix Asphalt Construction In Delaware
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Author : Radha Akkinepally
language : en
Publisher:
Release Date : 2006
Quality Control And Quality Assurance Of Hot Mix Asphalt Construction In Delaware written by Radha Akkinepally and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Highway engineering categories.
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).
Framework Of Developing Performance Related Specifications At Wisdot
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Author : Jae-ho Choi
language : en
Publisher:
Release Date : 2002
Framework Of Developing Performance Related Specifications At Wisdot written by Jae-ho Choi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Quality Assurance In Pavement Construction
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Author : G. J. Allen
language : en
Publisher: ASTM International
Release Date : 1980
Quality Assurance In Pavement Construction written by G. J. Allen and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Electronic book categories.
Testing And Inspection Levels For Hot Mix Asphaltic Concrete Overlays
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Author : Jeffrey S. Russell
language : en
Publisher:
Release Date : 2001
Testing And Inspection Levels For Hot Mix Asphaltic Concrete Overlays written by Jeffrey S. Russell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Technology & Engineering categories.
Dissertation Abstracts International
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Author :
language : en
Publisher:
Release Date : 1999
Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Dissertations, Academic categories.
Performance Tests For Hot Mix Asphalt Hma Including Fundamental And Empirical Procedures
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Author : Louay Nadhim Mohammad
language : en
Publisher: ASTM International
Release Date : 2006
Performance Tests For Hot Mix Asphalt Hma Including Fundamental And Empirical Procedures written by Louay Nadhim Mohammad and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Anisotropy categories.