Below are the first 10 and last 10 pages of uncorrected machine-read text (when available) of this chapter, followed by the top 30 algorithmically extracted key phrases from the chapter as a whole.
Intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text on the opening pages of each chapter.
Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.
Do not use for reproduction, copying, pasting, or reading; exclusively for search engines.
OCR for page 49
50
equipment tires are swept from the pavement surface before This synthesis subscribes to the definitions of QC and
opening to traffic. In cases where chip seals fail after a period quality assurance (QA) recommended by TRB (1999). As
of months owing either to loss of aggregate or flushing, the such, QA is the "planned and systematic actions necessary to
problems may be caused by materials, design, or construction provide confidence that a product or facility will perform
(Shuler 1991). satisfactorily in service." Additionally, QC is defined as the
"quality assurance actions and considerations necessary to
Figures 53 and 54 summarize chip seal construction prac- assess production and construction processes so as to control
tices. Their intent is to present this information in a compara- the level of quality being produced in the end product." Both
tive manner where it can be easily understood and applied. terms are inherent in all of the best practices identified in this
synthesis.
QUALITY ASSURANCE AND QUALITY CONTROL
Special attention was directed toward identifying labora-
The success of a chip seal is highly associated with the con- tory and field tests that can be correlated with successful
trol implemented over the quality of materials and con- chip sealing practice. The QC section of the survey empha-
struction. Constructability reviews during planning, design, sized the requirements that respondents use for ensuring
and construction phases improve the quality of only the final conformance of the materials and the construction operation
product. The QC measures widely implemented intended to the contract specifications. Table 11 is an indication of
for chip seal projects are provided by material testing and some specific chip seal testing methodologies that were ver-
inspection forces. ified in the literature review.
FIGURE 53 Preventive maintenance chip seal construction practices (adapted from Peshkin et al. 1999).
