Development of specification limits for asphalt pavements based on quality control and quality assurance data

Jian-Shiuh Chen, Min Chih Liao, Ching Hsiung Wang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
JournalJournal of Testing and Evaluation
Volume39
Issue number6
DOIs
Publication statusPublished - 2011 Nov

Fingerprint

Asphalt pavements
Quality assurance
Quality control
Specifications
asphalt
Normal distribution
Contractors
Statistics
Asphalt mixtures
Asphalt concrete
Asphalt
Sampling
Testing

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

@article{aba6676daee64390af91b981aa5219e3,
title = "Development of specification limits for asphalt pavements based on quality control and quality assurance data",
abstract = "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.",
author = "Jian-Shiuh Chen and Liao, {Min Chih} and Wang, {Ching Hsiung}",
year = "2011",
month = "11",
doi = "10.1520/JTE103612",
language = "English",
volume = "39",
journal = "Journal of Testing and Evaluation",
issn = "0090-3973",
publisher = "American Society for Testing and Materials",
number = "6",

}

Development of specification limits for asphalt pavements based on quality control and quality assurance data. / Chen, Jian-Shiuh; Liao, Min Chih; Wang, Ching Hsiung.

In: Journal of Testing and Evaluation, Vol. 39, No. 6, 11.2011.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Development of specification limits for asphalt pavements based on quality control and quality assurance data

AU - Chen, Jian-Shiuh

AU - Liao, Min Chih

AU - Wang, Ching Hsiung

PY - 2011/11

Y1 - 2011/11

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84863075947&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84863075947&partnerID=8YFLogxK

U2 - 10.1520/JTE103612

DO - 10.1520/JTE103612

M3 - Article

AN - SCOPUS:84863075947

VL - 39

JO - Journal of Testing and Evaluation

JF - Journal of Testing and Evaluation

SN - 0090-3973

IS - 6

ER -