Polymer concrete (PC) has been widely used for floor and bridge overlays, but because of the differences in the coefficients of thermal expansion between Portland‐cement concrete (PCC) and PC, there is concern about possible delamination at the interface. This paper is a report of the results of two experimental studies. The first was an investigation of crack propagation, stiffness deterioration, and delamination of PC‐PCC composite members subjected to load cycles at room temperature. The second was an investigation of the interface shear stresses and longitudinal normal stresses of PC‐PCC beams under various uniform thermal loads ranging from approximately 3°F (16°C) to 140°F (60°C). A hypothesis of the thermal phase was that interface shear stresses are localized near the ends of the beams. It was observed that: (1) Test beams survived 2,000,000 load cycles without delamination and without significant loss of stiffness; (2) interface shear stresses are end bound; and (3) the effective length of the en...

Epoxy Surface Treatments for Portland Cement Concrete Pavements

Thermal and Fatigue Behavior of Polymer Concrete Overlaid Beams

A DETECTOR WAS DEVELOPED WHICH MAPS THE DELAMINATED AREA OF CONCRETE ON A BRIDGE DECK. IT IS AN ELECTRONICALLY CONTROLLED INSTRUMENT WHICH INTERPRETS ACOUSTICAL SIGNALS TAKEN FROM THE CONCRETE AS THE INSTRUMENT CART ROLLS ALONG THE BRIDGE. A PROTOTYPE WAS CONSTRUCTED AND CONDITIONED FOR FIELD SERVICE. MATERIALS FOR SURFACE TREATMENT OF CONCRETE BRIDGE DECKS WERE TESTED AS DETERRENTS TO FREEZE-THAW SCALING DAMAGE. THE MOST EFFECTIVE MATERIALS WERE IDENTIFIED, AND METHODS AND SCHEDULES OF APPLICATIONS WERE DEVELOPED. AIR ENTRAINED CONCRETE WAS FOUND TO BE THE MOST RESISTANT TO FREEZE-THAW SCALING, AND A MIXTURE OF LINSEED OIL AND KEROSENE WAS FOUND TO BE EFFECTIVE IN COMBATING FREEZE-THAW DAMAGE AT A RELATIVELY LOW COST. MATERIALS AND METHODS FOR REPAIRING DECKS WITH 11/2 IN. TO 2 IN. THICK CONCRETE OVERLAYS WERE DEVELOPED, TESTED, AND PROVED IN FIELD INSTALLATIONS. IT WAS FOUND THAT A 2 IN. THICK PLAIN CONCRETE OVERLAY BONDED WITH GROUT TO A WELL PREPARED BASE PROVIDES A DURABLE OVERLAY WHICH ADDS TO THE STIFFNESS OF THE SLAB AMD PROVIDES A GOOD RIDING SURFACE. MATERIALS AND METHODS FOR STRUCTURAL REPAIR OF CRACKED OR FRACTURED CONCRETE WITH EPOXY RESIN WAS STUDIED IN THE LABORATORY. /FHWA/

Epoxy Surface Treatments for Portland Cement Concrete Pavements

Citations

Thermal and Fatigue Behavior of Polymer Concrete Overlaid Beams

Bridge deck deterioration: a summary of reports

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