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02642aam a2200373Ia 4500 001 C6D46DB4493111E49277FB87DAD10320 003 SILO 005 20141001010218 008 080102s2007 iaua b s000 0 eng d 035 $a (OCoLC)186466469 040 $a UIG $c UIG $d IOZ $d SILO 043 $a n-us-ia 088 $a HR-2107 100 1 $a Engle, Edward J. 245 10 $a High performance concrete bridge deck overlays for county bridges / $c Edward J. Engle. 260 $a Ames, Iowa : $b Research & Technology Bureau, Highway Division, Iowa Dept. of Transportation, $c 2007. 300 $a v, 9 p. : $b ill. (some col.) ; $c 28 cm. 500 $a "October 2007." 504 $a Includes bibliographical references (p. 9). 513 $a Final report ; $b May 2007 to October 2007. 520 $a The Iowa Method for bridge deck overlays has been very successful in Iowa since its adoption in the 1970s. This method involves removal of deteriorated portions of a bridge deck followed by placement of a layer of dense (Type O) Portland Cement Concrete (PCC). The challenge encountered with this type of bridge deck overlay is that the PCC must be mixed on-site, brought to the placement area and placed with specialized equipment. This adds considerably to the cost and limits contractor selection. A previous study (TR-427) showed that a dense PCC with high-range water reducers could successfully be used for bridge deck overlays using conventional equipment and methods. This current study evaluated the use of high performance PCC in place of a dense PCC for work on county bridges. High performance PCC uses fly ash and slag to replace some of the cement in the mix. This results in a workable PCC mix that cures to form a very low permeability overlay. 530 $a Also available on the Internet at: http://www.iowadot.gov/operationsresearch/reports/reports_pdf/hr_and_tr/reports/hr2107.pdf 650 0 $a Concrete bridges $z Dubuque County. $z Dubuque County. 650 7 $a High performance concrete. $2 trt 650 7 $a Bridge decks. $2 trt 650 7 $a overlays (pavements). $2 trt 710 1 $a Iowa. $b Bureau of Research and Technology. $b Bureau of Research and Technology. 856 41 $z Connect to the online version of this report in PDF format on the Iowa Department of Transportation Web site at: $u http://www.iowadot.gov/operationsresearch/reports/reports_pdf/hr_and_tr/reports/hr2107.pdf 941 $a 3 952 $l IAOX771 $d 20240710101520.0 952 $l OVUX522 $d 20191217025915.0 952 $l USUX851 $d 20160824062945.0 956 $a http://locator.silo.lib.ia.us/search.cgi?index_0=id&term_0=C6D46DB4493111E49277FB87DAD10320 994 $a C0 $b IOZInitiate Another SILO Locator Search