b'Lightweight Insulating Cellular Concrete:t,J, A Seamless RoofInsulation Deck By Leo A. Lega/ski Hereisa secret thathasbeen around formany years-theuse ofCellularExpanded lightweight insulating cellular con ConcreteAggregate creteforroofdecksinConcrete bothn con Mix Water/Cement Ratio0.50-0.601.50-2.00 ewstruction andreroofingapplica Cast Density36 -42 pcf55 - 65 pct tions.AlthoughcellularAir30 pcf45 pcf+/-Dry Density+/-concreteinsulatingroofOven Dry Density25 -30 pcf25 - 30 pct decks have been appliedCompressive Strength200 psi125 psi for more than forty years, many intruction the consindustryarenotawa regularconcrete.Thisratio maytable. reaboveexpressedtoga eason thatcellular concrete isalso beas 56llonsMostlikelyther that differentfromexpandedof mix water per sack of cement.designers,specificationwriters, aggregate concrete.Expanded aggregate con isconsultan , androofing manufaccretetsLiteraturehasbeenproduced from exp mineralsturers con these twoials andedfusematerwritten about lightweightsuchperlite or mica. When theseisthattheymentallylumpthem as insulatingcellularcon mineralsexpandedheat,togetheras"insulatingconcrete." arebythe crete roof d detaingresulting open structure has aghMuchoftheliteratureincorrect\'\\ ecksIihithe characteristics, prop a nityforwater.Th thecharacterizes"insulating concret~ ffi us, erties,applicationpro cement/waterslu for expandedas containing excess moistu and rryre cess,anda aggregate concrete requires three tostates that it shouldbe used in ppropriatenot usesfor the material.Infour times more mixthan themany roofing systems due to this water Lightweightthis article Id uss lightweightcellularslurr highwaterconten Lightweight willisc concretey.t. insulatingcellular concreteastheBothcellularconcreteandinsulatingc larconcrete roof elluinsulating cellularexpandedaggregateconcretearedecks do not have aw conmaterial of choice fordecks.highater roof concrete meetslighter inight and lower in d tentanddonotconta excess we en in Backgroundsity than regular concrete. However,moisture. anlatingderncreall the criteria oflnsuconcreteroofdecksthein-placepropertiesandroofMo cellular con te syscome in two basic types-produceddeckc aredifferenttems today usuallyaideal roofharacteristicsarecombinadeckwitheithercellularconcrete(pre due to thewater r oftionofcastcellularconcrete mixequirements insulating material.formedfoam)orwithexpandedeach m rial.sandwiched aroundpolyate expanded aggregate concrete(perlite or ver The designer,specificationstyrene (EPS) foam insulation board lth igh miculite}. A ough portland cementwriter, and consultant must under resultingin low weightand hand water are common to bothofstand the differe between cellu- insulating value. nces these insulating concretes, there arearconcreteandexpanded 1 significantdifferencesin han a concrete.IngeneralThe Ideal Insulation dlingggregate and final product charact tics.terms, cellular c is typicallyOvertheyears,various people eris oncrete Cellular concreteproduced bylighter(castata lowerdensity),have detailed the characteristics for is stronger (more cem and having aanlf insulation. T eblendinga preformedfoamofaentidea roo hes charthick,richconsistency(similar tolower water/cement ratio), and con acteristicsareincludedinthe ce)National RoofingrsContracto Assoshaving cream in appearan into atains significantly less water under normal conditionsthanexpandedciation (NRCA) Roofing Manua 4th cement/watersrry.Thewater/l-I u cementr ofcellularconcreteaggregateconcrete.Thesediffer Edition. Lestheit\'\\ atiot\' reviewcharacter (0.50 to 0.60) is similar to that ofencesmay be summarizedinthetics of lightweight insulating cell~'