MARC Record from Library of Congress

LEADER: 03457cam a22003977a 4500
001 2008377901
003 DLC
005 20080904093104.0
008 080728s2008 iaua b 000 0 eng d
010 $a 2008377901
035 $a(OCoLC)ocn213281291
040 $aUIG$cUIG$dOHDOT$dDLC
042 $alccopycat
043 $an-us---
050 00 $aTE275$b.L43 2008
082 00 $a625.8/5$222
100 1 $aLee, Hosin.
245 10 $aExamination of curing criteria for cold in-place recycling /$cby Hosin David Lee and Soohyok Im.
260 $aAmes, Iowa :$bIowa Highway Research Board c/o Iowa Dept. of Transportation,$c2008.
300 $aX, 122 p. :$bill. (some col.) ;$c28 cm.
500 $a"March 2008."
504 $aIncludes bibliographical references : (p. 120-122).
513 $aFinal report.
520 $aCold In-Place Recycling (CIR) has been used widely in rehabilitating the rural highways because it improves a long-term pavement performance. A CIR layer is normally covered by a hot mix asphalt (HMA) overlay in order to protect it from water ingress and traffic abrasion and obtain the required pavement structure and texture. Curing is the term currently used for the period of time that a CIR layer should remain exposed to drying conditions before an HMA overlay is placed. The industry standard for curing time is 10 days to 14 days or a maximum moisture content of 1.5 percent, which appear to be very conservative,. When the exposed CIR layer is required to carry traffic for many weeks before the wearing surface is placed, it increases the risk of premature failure in both CIR layer and overlay. This study was performed to explore technically sound ways to identify minimum in-place CIR properties necessary to permit placement of the HMA overlay. To represent the curing process of CIR pavement in the field construction, three different laboratory curing procedures were examined: 1) uncovered, 2)semi-covered and 3) covered specimens. The indirect tensile strength of specimens in all three curing conditions did not increase during an early stage of curing but increased during a later stage of curing usually when the moisture content falls below 1.5%. Dynamic modulus and flow number increased as curing time increased and moisture contents decreased. For the same curing time, CIR-foam specimens exhibited the higher tensile strength and less moisture content than CIR-emulsion. The laboratory test results concluded that the method of curing temperature and length of the curing period significantly affect the properties of the CIR mixtures. The moisture loss index was developed to predict the moisture condition in the field and, in the future, this index be calibrated with the measurements of temperature and moisture of a CIR layer in the field.
530 $aAlso available via the Internet.
536 $aSponsored by the Iowa Highway Research Board$fIHRB project TR-553
650 7 $aMoisture content.$2trt
650 7 $aAsphalt tests.$2trt
650 7 $aCold mix paving mixtuers.$2trt
650 0 $aPavements, Asphalt$xRecycling.
650 0 $aAsphalt emulsion mixtures.
650 0 $aPavements, Asphalt$xMaintenance and repair.
700 1 $aIm, Soohyok.
710 1 $aIowa.$bHighway Research Board.
856 40 $uhttp://www.operationsresearch.dot.state.ia.us/reports/reports_pdf/hr_and_tr/reports/tr553%20Final.pdf
856 41 $uhttp://worldcat.org/oclc/213281291/viewonline$3View Online