Investigation into improved pavement curing materials and techniques : part 2 (phase III).

794854181Final report.PDFTech ReportIowa DOT TR-479CTRE project 02-77Concrete curingCuring agentsConcrete pavementsTestingIowaIowa State University. Center for Portland Cement Concrete Pavement TechnologyCable, James K.Wang, KejinZhi, GeIowa State University. Center for Portland Cement Concrete Pavement TechnologyIowa. Highway Research BoardIowa. Dept. of TransportationNTL-HIGHWAY/ROAD TRANSPORTATION-MaterialsNTL-HIGHWAY/ROAD TRANSPORTATION-Construction and MaintenanceNTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and PerformanceUS Transportation CollectionAppropriate curing is important for concrete to obtain the designed properties. This research was conducted to evaluate the curingeffects of different curing materials and methods on pavement properties. At present the sprayed curing compound is a common usedmethod for pavement and other concrete structure construction. Three curing compounds were selected for testing. Two differentapplication rates were employed for the white-pigmented liquid curing compounds. The concrete properties of temperature, moisturecontent, conductivity, and permeability were examined at several test locations.It was found, in this project, that the concrete properties varied with the depth. Of the tests conducted (maturity, sorptivity,permeability, and conductivity), conductivity appears to be the best method to evaluate the curing effects in the field and bears potentialfor field application. The results indicated that currently approved curing materials in Iowa, when spread uniformly in a single or doubleapplication, provide adequate curing protection and meet the goals of the Iowa Department of Transportation. Experimental curingmethods can be compared to this method through the use of conductivity testing to determine their application in the field