ASTM_D_3743_-_84_1995.pdf

Designation:D 3743 84(Reapproved 1995)Standard Terminology Relating toBridge Deck and Substructure Protection1This standard is issued under the fixed designation D 3743;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.abrasive blast cleaningthe removal from a concrete surfaceof all laitance,oil,grease,curing compounds,or coatings bythe action of a high-velocity stream of abrasive in air orwater followed by a blast of air to provide a concrete surfacefree of abrasive dust and other particles.The abrasive maybe clean silica sand,mineral grit,steel shot,steel grit,ormineral slag.anodes,impressed currentinactive materials such as high-silicon cast iron and graphite.These anodes provide theelectrical connection to the conductive overlay,but requireuse of an outside source for protective energy,that is,animpressed current.At the current densities recommended bythe manufacturers,these anodes are highly resistant toelectrolytic attack but deteriorate at known rates.anodes,sacrificialchemically active metals such as zinc,aluminum,and magnesium which,when electrically con-nected to the reinforcing bar,will provide the energy neededto cathodically protect the reinforcing bar.Sacrificial anodesdeteriorate in service at a rate proportional to the energyneeded to protect the reinforcing bar plus whatever maydeteriorate by local-action corrosion.bitumen,polymer-modifieda black or dark-colored cemen-titious,high-molecular weight hydrocarbon such as asphalt,tar,or pitch in which polymer has been dispersed to modifythe properties of the bitumen.bitumen,rubberizeda special form of polymer-modifiedbitumen where an asphalt,tar,or pitch has been combinedwith natural or synthetic rubber to modify its properties.bleedersholes or pipes through bridge decks to provide fordrainage.blistersgas-or water vapor-filled bubbles or cavities in thewaterproofing membrane caused by entrapped air,the vola-tilization of liquids applied to the concrete,or the vaporiza-tion of water on or in the concrete.cathodic protectionthe control of corrosion by the applica-tion of a cathodic current to the reinforcing steel by means ofimpressed current or a sacrificial anode.conductive bituminous overlaya first course bituminousoverlay using aggregate or high-crystalline structure carbon,or equivalent,which is capable of distributing impressedcurrent from the anodes to all parts of the bridge deckroadway surface.conductive polymer mortara rigid material formulated bypolymerization of a select resin system and conductivecalcined petroleum coke which is capable of distributingimpressed anodic current.The material is used to fill cutslots,as strips or ribbons in grid-fashion on a bridge deck orstructure,or applied as a thin overlay to substructureconcrete members for stopping the corrosion of reinforcingsteel.continuous spun bonded polypropylene mata sheet mate-rial,resembling paper or felt,made from polypropyleneplastic fibers,used in the manufacture of preformed mem-brane sheet for waterproofing.curingthe development of hardness,strength,or other de-sired properties by evaporation,polymerization,or chemicaland physical change in a material that is initially liquid orplastic in consistency.curing agentanything such as heat,a catalyst,or a protectivecoating that assures,enhances,or accelerates curing.half cella standard reference electrode used to measure theelectrical potential between it and the reinforcing steel.Mostcommonly used on bridge decks is the saturated copper-copper sulfate half cell(CSE).impregnationfilling the void structure of hardened concreteby saturating it with a liquid system.impressed current protectionapplication of cathodic pro-tection by means of an external dc power source.latex-modified portland cement concreteconcrete that in-cludes polymer emulsion,resulting in a dense hardenedconcrete resisting the movement of moisture and chlorideions.Usually used as a relatively thin overlay(1 to 112in.(25 to 38 mm)on conventional concrete bridge decks.mastica thick adhesive material used as a cementing agentfor holding waterproofing membrane in place or used as acaulking for sealing.membrane,liquida liquid material that,when applied to asurface,cures to form a continuous waterproof film bycooling,evaporation of solvent,or by polymerization.membrane,preformed elastomeric sheeta sheet mem-brane composed of cured or vulcanized rubber.membrane,preformed modified bitumena membranecomposed of asphalt or coal tar modified with rubber orother modifiers and reinforced with woven or nonwovenmesh or scrim.1These definitions are under the jurisdiction of ASTM Committee D-4 on Roadand Paving Materials and are the direct responsibility of Subcommittee D04.36 onBridge Deck Protective Systems.Current edition approved Sep