Evaluation of RESURF CR.
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1999-08-01
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Edition:Final report.
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Abstract:This report examines the use of RESURF CR and RESURF II, which are manufactured by POLYMER ; CONCRETE INC., for the repair of punchouts in continuously reinforced concrete pavement (CRCP). ; These products were used to repair 43 punchouts on I-55 north of McComb in Pike and Lincoln Counties. ; These polymer concrete products were used to cement the broken concrete pavement pieces together and ; restore an acceptable riding surface. One punchout had the reinforcing steel cut before the application of ; RESURF CR. The usual temporary method of repair is to use asphalt mix to fill the punchout. Traditional ; permanent repairs involve removal of the failed concrete, re-establishment of the reinforcing steel, and ; placement of new concrete. ; RESURF CR is a variable viscosity, low shrink, pourable polyester compound designed for cracks up to 1/2 ; inches (12.7 mm). The viscosity can be tailored on the jobsite to the crack widths encountered. The compound ; reaches a compressive strength of 2,000 psi (13.790 MPa) in two hours, so the completed patch can ; be opened to traffic shortly after the repair is complete. ; RESURF II is a general performance polymer concrete consisting of a styrene diluted modified polyester ; resin with a select aggregate blend, which is used to restore a smooth riding surface to the patch area once ; the RESURF CR has been applied. This product has been previously approved as a concrete patching material ; in Mississippi. ; RESURF CR/RESURF II did not prove to be a long-term (greater than one year) solution for punchout repairs ; and required more effort and time than making a temporary repair by filling the punchout with asphalt.
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