Developing QC/QA Specifications for Hot Mix Asphalt Concrete in Illinois

1997 ◽  
Vol 1575 (1) ◽  
pp. 66-74 ◽  
Author(s):  
Arti Patel ◽  
Marshall Thompson ◽  
Eric Harm ◽  
William Sheftick
Keyword(s):  
Quality Management ◽  
Asphalt Concrete ◽  
Hot Mix Asphalt ◽  
Management Program ◽  
Department Of Transportation ◽  
Certification Program ◽  
Aggregate Gradation ◽  
Percent Increase ◽  
And Performance

The Illinois Department of Transportation (IDOT) has recently undertaken a quality management program to improve the quality of construction, allow more innovation, and reduce IDOTs management of industry construction programs. The Asphalt Concrete (AC) Quality Control/Quality Assurance (QC/QA) program is a significant part of this quality management program. IDOT accredits the success of the AC QC/QA program to gradual implementation and contractor and industry involvement. In 1991, four projects were constructed under a newly developed QC/QA specification. After reviewing and evaluating feedback from the contractors and IDOT personnel, the specification was revised for use on 1992 projects. In 1992, IDOT let 30 QC/QA projects, and in 1993, 65 QC/QA projects. In 1994 and 1995, most AC projects containing over 225 metric tons (250 tons) of hot-mix asphalt (HMA) were designated as QC/QA projects. In conjunction with this effort on AC quality, an aggregate certification program was implemented. The program ensures that aggregate gradation is highly controlled and is acceptable for incorporation into the mixture. Training programs for contractor QC and aggregate certification were also implemented. Analysis of the data indicates an increase in uniformity of the HMA, potentially leading to a 15 percent increase in fatigue life. IDOT is now examining the implications of developing end-result and performance-related specifications (ERS/PRS) for the AC QC/QA program. In the summer of 1996, one QC/QA project was shadowed and evaluated based on newly developed ERS/PRS.

Current Initiatives in Quality Asphaltic Pavement Construction: The Wisconsin Experience

1996 ◽  
Vol 1543 (1) ◽  
pp. 120-124
Author(s):  
Robert L. Schmitt ◽  
Gary C. Whited ◽  
Gerald J. Waelti ◽  
Awad S. Hanna ◽  
Jeffrey S. Russell ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Quality Management ◽  
Process Control ◽  
Hot Mix Asphalt ◽  
Management Program ◽  
Asphalt Pavements ◽  
Nuclear Density ◽  
Wisconsin Department ◽  
Asphalt Paving ◽  
And Performance

The Wisconsin asphalt-paving industry is undertaking several initiatives to continually improve the construction of asphalt pavements through a quality management program and two piloted specifications. The quality management program provides contractors and the Wisconsin Department of Transportation (WisDOT) with structured process control and quality assurance for hot-mix asphalt paving projects. A warranted pavement specification, piloted on three projects during 1995, warranties the pavement for 5 years and allows greater flexibility for contractors during construction. A statistically based nuclear-density specification will be piloted in 1996 to provide density-process control and quality assurance using nuclear density gauges. These initiatives are moving toward the goal of performance-based construction and are possible with a commitment to quality from WisDOT and contractors, including members of the Wisconsin Asphalt Pavement Association. Members of the industry are combining resources and restructuring to develop and implement methods to improve the quality and performance of hot-mix asphalt pavements. Focus is placed on mutual development of solutions to various problems encountered by the industry.

scholarly journals Quality Management in Libraries Case Study: Book Collection Retrieval in Academic Libraries

2021 ◽  
Vol 9 (2) ◽  
pp. 182
Author(s):  
Vilianty Rizki Utami ◽  
Desni Sri Hastuti Sihite
Keyword(s):  
Quality Control ◽  
Quality Management ◽  
Comprehensive Evaluation ◽  
Case Study Method ◽  
Control Data ◽  
User Expectations ◽  
And Performance ◽  
Quality Control Data

Quality management in the library is related to quality control of the library's work to meet user expectations and contributes to the continued success of the organization. However, quality control is lacking and not be the main focus in many libraries. This paper aims to explain how quality management improves work results in libraries. The research method used in this paper is qualitative research using a case study method. We conduct research in Library X that already underwent quality control in book processing activities. The data were collected through observation, and interviews for book processing activities and its quality control data during 2018-2020. The data was then analyzed document analysis. The study found that Library X could perform better by improving the quality of book processing and fixing the error just before they put the book on its shelves. Quality control gives a comprehensive evaluation in Library X either for humans, processes, and systems of book processing activities that help Library X conduct its duty to provide their user needs and expectations. Quality control and quality management also help Library X describe the library working atmosphere and can be used for giving motivation to all librarians and staff to give better service and performance for the end-users.

The Superpave Gradation Restricted Zone and Performance Testing With the Georgia Loaded Wheel Tester

1997 ◽  
Vol 1583 (1) ◽  
pp. 106-111 ◽  
Author(s):  
Donald E. Watson ◽  
Andrew Johnson ◽  
David Jared
Keyword(s):  
High Performance ◽  
Performance Testing ◽  
Mix Design ◽  
Design System ◽  
Department Of Transportation ◽  
Natural Sand ◽  
Aggregate Gradation ◽  
Actual Field ◽  
And Performance ◽  
Highway Research

Guidelines for the new hot-mix asphalt design system, Superpave, were developed under the Strategic Highway Research Program. One of the most controversial components of this system is the aggregate gradation restricted zone. This restricted zone was adopted as a gradation specification primarily to deter the use of high levels of natural sand in high-performance mixes. By designing mixes with gradations that avoid the restricted zone (i.e., limit natural sand), the internal strength provided by internal friction could be improved. Some agencies question the validity of the restricted zone. The specified gradations of many current mixes contain bands that enter the restricted zone, but the mixes have performed well for years in actual field conditions. The Georgia Department of Transportation (GDOT) currently specifies several standard mixes with gradations that enter the restricted zone and still perform well. These high-performance mixes contain good quality, 100 percent manufactured aggregates and no natural sand. GDOT recommends that the Georgia loaded wheel tester or some other proof tester be incorporated into the mix design process to screen mixes before rejecting them solely because their combined gradation enters the restricted zone. If mixes having combined gradations that enter the restricted zone are categorically rejected, mixes that are economical for the purpose intended may be rejected in the process.

scholarly journals THE PROCESS APPROACH IN THE MANAGEMENT OF A MULTI-HOSPITAL, AS A TOOL IMPROVE ITS EFFICIENCY

2015 ◽  
Vol 7 (4) ◽  
pp. 84-93
Author(s):  
V N Filatov ◽  
I I Khayrullin ◽  
F N Kadyrov
Keyword(s):  
Quality Management ◽  
Performance Management ◽  
Practical Experience ◽  
Process Approach ◽  
Insurance Companies ◽  
Management Tool ◽  
Medical Organisation ◽  
And Performance ◽  
A Chain

In view of the increasing demands from stakeholders (patients, management, insurance companies, media, etc.) to ensure the quality of health care and the implementation of the program of state guarantees in the current difficult conditions of increasing importance is the efficient and performance management of medical organisation (MO). As part of these requirements has been widely discussed question of the necessity of building a system of quality management MO. Practical experience shows that building a systematic approach to quality management depends primarily on the availability of managerial competencies for managers and heads of departments MO, as well as their level of motivation, or resistance to organizational change. One of the tested and proved to be a reliable tool in the management of the quality of medical practice is a process approach. With this management tool, it is possible to present the activities of MO as a chain of interrelated processes. It defines the criteria for the quality of the product, the necessary resource and regulatory support, introduces the institute of internal and external customer, which ultimately has a positive effect on the performance indicators and efficiency MO.

Wisconsin Department of Transportation Hot-Mix Asphalt Round Robin Laboratory Qualification Testing Program

2017 ◽  
Vol 2630 (1) ◽  
pp. 103-109
Author(s):  
Gary C. Whited ◽  
Hala Nassereddine ◽  
Barry Paye
Keyword(s):  
Laboratory Test ◽  
Hot Mix Asphalt ◽  
Round Robin ◽  
Management Program ◽  
Test Results ◽  
Department Of Transportation ◽  
State Highway ◽  
Wisconsin Department ◽  
Laboratory Test Results ◽  
Wisconsin Department Of Transportation

The Wisconsin Department of Transportation (DOT), Madison, uses a quality management program (QMP) specification for acceptance and payment of hot-mix asphalt (HMA) pavement. The QMP allows for product acceptance on the basis of contractor quality control (QC) testing when verified by the Wisconsin DOT quality verification (QV) tests. The contractor is required to do daily QC testing of mix properties in a department-certified, qualified laboratory located at the plant site. The Wisconsin DOT maintains a QV program (QVP) and conducts QV tests to determine the quality of the final product. QV and QC test results are compared, and a mix is considered acceptably verified if the two results are within specified limits. When test results do not meet these limits, the Wisconsin DOT performs referee tests to determine mixture conformance, acceptability, and payment. In 2011, the Wisconsin DOT began to see significant increases in the number of requests for referee testing as a result of wide disparities between QC and QV laboratory test results. To investigate this disparity, the department initiated a round robin laboratory test program. Results from the investigation proved to be insightful. The program was expanded and is now a key component of the Wisconsin DOT annual laboratory qualification certification program. This paper describes the program, how it is administered, how tests results are analyzed, and how nonconforming laboratories are identified. Test results obtained from the program are presented and recommendations developed for program improvements. The program details should be useful to other state highway agencies that use contractor QC tests for acceptance.

Arkansas Experience with Crumb Rubber Modified Mixes Using Marshall and Strategic Highway Research Program Level I Design Methods

1996 ◽  
Vol 1530 (1) ◽  
pp. 25-33 ◽  
Author(s):  
Gary V. Gowda ◽  
Kevin D. Hall ◽  
Robert P. Elliott
Keyword(s):  
Asphalt Concrete ◽  
Hot Mix Asphalt ◽  
Heavy Traffic ◽  
Percent Level ◽  
Crumb Rubber ◽  
Aggregate Gradation ◽  
Dry Process ◽  
Wet Process ◽  
Asphalt Rubber ◽  
Level I

Unmodified and crumb rubber modified mixes conforming to the Arkansas State Highway and Transportation Department Type II surface course specifications were designed for heavy traffic conditions and environmental conditions typical to Arkansas by using the Marshall and Superpave Level I methods. Specimens prepared at appropriate design asphalt contents were evaluated for both volumetric and performance considerations. Three mix types, an unmodified hot-mix asphalt concrete, a dry process rubber modified asphalt, and a wet process asphalt rubber, were included in the investigation. For the asphalt cement, crumb rubber, aggregate type, and aggregate gradation used, the design asphalt content and the VMA were reduced for the SHRP Level I method relative to the Marshall method. Incorporation of crumb rubber into hot-mix asphalt concrete provided increased rutting resistance; however, the rubber modified mixes did not show enhanced resilient and tensile properties when tested at 25°C. Also, the performance-related properties of the SHRP Level I asphalt-rubber mixes (5, 10, and 15 percent A-R blends) evaluated did not differ significantly at 5 percent level of significance.

scholarly journals Chemistry proficiency testing programs at national institute for food control (NIFC) in the year 2017

2018 ◽  
Vol 1 (2) ◽  
pp. 40-48
Author(s):  
Cuong Dang Huu ◽  
Keyword(s):  
Quality Assurance ◽  
Quality Management ◽  
Proficiency Testing ◽  
Health Sector ◽  
Management Program ◽  
Technical Competence ◽  
Food Control ◽  
Testing Program ◽  
Testing Laboratories

National Institute for Food Control Proficiency testing plays a very important role in ensuring the quality of testing. Based on the results of the proficiency testing, the managers as well as the relevant members could assess the technical competence of the laboratory. Participating in proficiency testing is an evidence that a laboratory is implementing a quality management program in accordance with ISO/IEC 17025. Through the proficiency testing program, the participating laboratories themselves could evaluate their capabilities and address the causes affecting the quality of tests so as to take measures to ensure better quality assurance. This study provides a snapshot of the testing capacity of food testing laboratories within and outside the health sector based on chemistry proficiency testing conducted by the National Institute for Food Control (NIFC) in 2017.

scholarly journals Study on Construction Quality Management of Expressway Asphalt Concrete Pavement

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
Zhao Zhijiang
Keyword(s):  
Quality Management ◽  
Asphalt Concrete ◽  
Raw Materials ◽  
Concrete Pavement ◽  
Construction Quality ◽  
Branch Line ◽  
Resistance Durability ◽  
Asphalt Concrete Pavement

Abstract: The highway has been growing with the development of China's economy and among which asphalt concrete pavement is widely used in highway construction with its many advantages such as good slip resistance, durability, surface smoothness, strength, stability and easy maintenance. This paper takes the highway construction of Yunfu to Zhanjiang section of the Shan-Zhan Expressway and branch line of the LM10 contract section as an example to explore the quality of raw materials, construction quality and other aspects of asphalt concrete pavement. It is hoped that it will help to promote the construction quality of asphalt concrete pavement.

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