Effects of coarse aggregate on the physical properties of Florida concrete mixes : [summary].

PDFBriefBDV31-977-08Portland cement concreteCoarse aggregatesLimestoneModulus of elasticityCompressive strengthMix designPhysical propertiesFloridaFlorida. Dept. of TransportationFerraro, Christopher C.University of FloridaUS Transportation CollectionThe concrete used on highway projects is mostly Portland cement concrete, a mixture ofPortland cement, a coarse granular material called aggregate, and fine granular material, oftensand. While chiefly a filler, aggregate\ue2\u20ac\u2122s properties strongly affect the properties of concrete madewith it. Most aggregate produced in Florida, called limerock, is a type of local limestone whichtends to be more porous, softer, and lessdense than limestone from other U.S. regions.It is generally assumed that this differenceproduces a less strong concrete, so, additionalPortland cement is used to compensate,leading to increased cost for concreteincluding limerock