Toro CM Series - Material Mixing and Drum Usage; Mixing the Material

MixingtheMaterial
DANGER
Eyeandskincontactwithconcretematerialsand
breathingthedustinvolvedishazardoustoyour
health.
•Ensurethatthereisadequateairventilation.
•Wearadustmasktopreventinhalationofdust
whileusingthemachine;refertoSafeOperating
Practices(page4).
•Avoiddirectcontactofcementandconcrete
materialswithskinandeyes.
Important:Donotaddmorematerialthanthebatch
capacityforyourspecicmachinemodel;referto
Specications(page15).
Note:Followthemanufacturer’sinstructionsthatareprinted
onthepackagingoftheproductthatyouareusing.
Concretehasthefollowing4basicingredients:
•Sand
•Gravel
•Portlandcement
•Water
Dependingontheapplication,youcanusedifferentratios
ofthese4ingredients.
Therearemanyvariationsofconcretemixrecipes,depending
ontheapplication.Itisimportanttousetheappropriate
quantityofwater.Usingtoolittlewaterresultsindryareasin
themix,butusingtoomuchwaterresultsinweakerconcrete.
Theamountofwaterneededvariesdependingonmoisture
contentofthesandandgravel.Themixshouldhavea
thicknesssimilartopeanutbutter.
Keepthepouredconcretedampforseveraldaystoobtain
propercuring.Evaporationresultsinweakerconcrete.
Concretecuresthroughhydration,areactionbetweenwater
andcement.
Beforeyoumixmaterial,completethefollowing:
1.Movethemachinetoaleveljob-sitelocation.
2.Removethemachinefromthetowvehicle.
3.Securethemachinefrommovement.
4.Ensurethatthedrumisinthemixposition(upright).
5.Engagethedrumlatchandensurethatitdoesnot
rotatetowardthedumpposition.
MixingPre-MixConcrete
1.Ensurethatthetiltbrakeisfullyengagedandthatthe
drumisoperatingatfullspeed.
2.Pourwaterintothedrum.
3.Addtherequiredamountofdrypre-mix.
4.Allowthedrumtoturnwhilethemixreachesthe
appropriateconsistency.
MixingSand,Gravel,andCement
Thetypicalratioformixingconcreteis1partPortland
cement,2partssand,and3partsgravel.
1.Ensurethatthetiltbrakeisfullyengagedandthatthe
drumisoperatingatfullspeed.
2.Pourwaterintothedrum.
3.Addtherequiredamountofgravel.
4.AddtherequiredamountofPortlandcement.
5.Addtherequiredamountofsand.
6.Allowthedrumtoturnwhilethemixreachesthe
appropriateconsistency.
Note:Addingwaterandgravelbeforecementandsand
allowsthemixleftinthedrumfromthepreviousbatchtobe
tumbledoffthedrumandpaddlesandintothenextbatch.
UsingtheDrum
DANGER
Contactwiththemixingpaddlescouldcause
damageorinjury.
Neverputyourhandsinsidethedrumatanytime.
DumpingtheDrum
Note:Whendumpingabatchofmaterial,leavetheengine
runningsothattherotatingdrumhelpsdumpthematerial.
1.Alignawheelbarroworsimilarcontainerofadequate
capacityinthepathofthedrumopening.
2.Whilethedrumisturning,rmlygraspthehandwheel
with1hand.
3.Usingyourotherhand,pullupwardonthe
drum-tilt-brakehandletoreleasethebrake.
4.Use2handstoslowlyturnthehandwheel,allowing
thedrumtotiltinthedesireddirectionanddumpthe
desiredamountofmaterial.
5.Turnthehandwheelintheoppositedirectiontoreturn
thedrumintoanuprightposition.
6.Pushdownonthedrum-tiltbraketolockthedrum
intoposition,avoidingaccidentaldischargingof
concretemix.
7.Afterdumpingabatchofmaterial,cleanthedrum;
refertoCleaningtheDrum(page27).
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