IS 4925 (2004): Concrete Batching and Mixing Plant

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2 ! $ ' + - Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge 0 1 ' 5 Jawaharlal Nehru Step Out From the Old to the New 1 + , 1 + Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live ! > 0 B Bhart hari N ti atakam Knowledge is such a treasure which cannot be stolen Invent a New India Using Knowledge IS 4925 (2004): Concrete Batching and Mixing Plant [MED 18:Construction Plant and Machinery]IS4925:2004n((114-Jm-?))

3 ?7%%wiRJT skf%wrfim(~5@-@IndianStandard Rf$TfkCONCRETEBATCHINGANDMIXINGPLANT SPECIFICATION( ,9 BAHADURSHAHZAFARMARGNEWDELHI110002 August2004 PriceGroup4 ConstructionPlantandMachinerySectionalCo mmittee,ME18 FOREWORDThisIndianStandard(FirstRevision )wasadoptedbytheBureauofIndianStandards, , , ,semi-automaticorfullyautomatic( ).Thecompositionoftheplantmayalsovarydep endinguponthetypeandcompositionofaggrega tes,cement,admixturesforconcrete,andvari ousotherrequirements,suchastemperatureco ntrolofaggregates, , ,informationonmanyaspectsmayhavetobesupp liedbothbytheuserfortheguidanceofthemanu facturerandbythemanufacturertotheprospec tiveuser, , ,thefinalvalue,observedorcalculated,expr essingtheresultofatestoranalysis,shallbe roundedoffinaccordancewithIS2:1960 Rulesforroundingoffnumericalvalues(revis ed).))

4 Thenumberofsignificantplacesretainedinth eroundedoffvalueshouldbethesameasthatoft hespecifiedvalueinthisstandard. IS4925:2004 IndianStandardCONCRETEBATCHINGANDMIXINGP LANT SPECIFICATION(FirstRevision)1 SCOPET hisstandardcoverstherequirementsofconcre tebatchingandmixingplantwithmanual, , , :. :19852062:19992932:19934634:19913 CAPACITYT itleGeneralrequirementsforbatchtypeconcr etemixers(secondrevision)Steelforgeneral structuralpur-poses Specification@fthrevision)Enamelsyntheti c,exterior:a)undercoating,b)finishing ofcementandcementitiousmaterials;Numbers ofcoarseandfineaggregates;Typesofwater(c hilledwater/iceflakes);andDesirabledispe nsingarrangementofadditivessuchas,airent rainingagen~waterreducingandsetretarding agent,etc, )TypeofPlant1)Storagearrangementforsanda ndag-gregates:i)ii)iii)iv)Boomscraperpla nt,thatisopenstoragewithretainingwalls.

5 Groundstoragehopper(forsmallerplants);Gr oundstoragehopperwithweigh-ingfacilityat beltconveyo~ )Storagearrangementforcement:Cementsilo, )WeighingArrangements1) 2)3)4)5)6)7)Singleweighingsystemforaggre gatesandcement;Independentweighingarrang ementforcementaswellasforallaggregatesto gether;Independentweighingarrangementfor eachtypeofaggregate;Morethanoneweighinga rrangementforcementtocatertothedifferent typesofcements;Arrangementformeasurement ofwaterthroughflowmeterorthroughweigh-me nt;Additionalarrangementsforweighmentofi ceflakes; IS4925:2004d)e)f)TypeofMixer1)Non-tiltin greversibledrumconcretemixer,2)Doublecon icaltiltingmixer,3)Panmixer,4)Turbopanmi xer,and5) Forplantsupto30m3/hcapacity, , )2)3)Manualcontrolthroughindividuallever sforopeningofgates(recommendedforbatchin gplantsupto20m3/hcapacity);Semi-automati ccontrolthroughin-dividualpushbuttonsfor openingofvariousgatesbyelectro-pneumatic allyorhydraulicallyoperatedactuators(rec omme~dedforbatchingplantsbelow30m/hcapac ity).

6 Fullyautomaticcontrolthroughasinglepushb uttonforbatchingofallag-gregates,cement, waterandadditives(recommendedforbatching plantsof30m3/handabovecapacity);ReadyMix edConcretePlantsReadymixedconcrete(RMC)p lantsshallbeequippedwithcomputer(contain ingminimum15recipes), :1)2)3)4)5)6)7)8)9)10)11)12)13)14)15)16) 17)NameofRMCplantsupplierwithlogoandaddr ess,DeliverynoteNo.,Nameofreceivingp~y,O rderedquantityinm,Recipenumber,Numberofb atches,Batchsizeinm3,Date,Startingtime,M oisturepercentageofeachmaterialatthetime ofbatching,Weighingchartforeachtypeofcom -ponentwithtotalforeachcomponentindepend ently,Totalquantitydeliveredinm3,Remarks column,Transitmixernumberandcapacity,Tra nsitmixerdriver sname,RepresentativeofRMCplant(signature column),andRepresentativeofcustomer(sign aturecolumn).

7 NOTE )AdditionalFacilities1)2)3)4)5)6)7)Autom aticcement/watercorrectionarrangementMim icdisplaypanelshowinghighandlowpositiono fvariousstoragehoppers;Materialconsumpti onreportonannual,monthlyanddailybasis;Cu stomerreport;Accounting;Stockmaintenance ; ,plantsof30m3/hcapacityandaboveshallhave suitablearrangementsforcoolingorheatingo fconcrete. I% ,theplantshallconsistofthefollowingcompo nentsofsuitablesizerelatedtothecapacityo ftheplant:a)b)c)d)e)f) ;BatchingequipmentConcretemixe~Controlpa nel;Materialfeedingandelevatingarrangeme nt; , ,cementweighhatchershallbeprovidedsepara telywithindependentstructureandthecement compartmentshallbewater-tightandprovided withnecessaryairvent, , ,basedontherecommendationsofthesupplier, - ,thecabinandit :a)b)c)Manualhatcher ,theac-curacyofbatchingoperationisdepend entontheoperator (cher Automatichatchershallbechargedbydevicesw hich,whenactuatedbyasinglestarterswitch, :1)2)3)4)Chargingdevicecannotbeactuatedu ntiltheweighingscalehasreturnedtozero.

8 ( );Chargingdevicecannotbeactuated,ifthedi schargedeviceisopen;Dischargedevicecanno tbeactuated,ifthechargingdeviceisopen; , ,thefollowingtolerancesshallapply,basedo ntherequiredweightofmaterialbeingweighed :TypeofMaterialToleranceinPercentageCeme ntandothercememntitious*1materialsSandag gregates& 2IS4925:2004 TypeofMaterialToleranceinPercentageWater *1 Admixture* , :~= ;R=scalecapacityinkg;andT= ,thatis,water,cement, , , , (intermsofconcreteinasinglebatch) ,hatcheranddialindicatorsshallbeprovided fortheaggregates,cement,water, ,theweighing cutoff shallbeintwostages,thatis, initial and final 1k3 IS4925 , ,levelling,aligning, ,1percentforcement,3percentforadmixtures , , , ,thereshallbearrangementforplantsabove30 m3/hformeasuringandintroducingsmallincre mentsofwaterintomixerwhen~ (ifprovided,forair-entraining,waterreduc ing,set-retardingagent) ( ) ,deliverypumpfromthegroundstorage, ( ).

9 , (afterallmaterials,exceptthefullquantity ofwaterhavebeenaddedinthemixerdrum) ,500,750,1000,1500,20001000,2000,3000,40 00,5000375,500,750,1000,1500,2000,300050 0,750,1000,1250,TypeMinimumMixingTimesNo n-tilting40reversibledrumtypeDoubleconic altilting30typePantype30 Singleshafthwin301fi,2060,25(X),3fMO,sha hcompulsory3500,4000,5~,6000typdpugmillt ypeNOTE IS492 , (orlocking) ,airorhydraulicoperatedcontrols,consiste ncyindicators, , ,singleoperator,push-buttonoperatedcontr olpanelcompletelyinter-wiredandhavingthe followingprovisions:a)Panelmounteddigita lweightindicator/frontlocatedweightdials foreachmaterial, )Pushbuttonsandindicationlightsforcom-pl eterangeofbatching,masterbatchpush-butto n,mixinganddischargepush-buttons, ,alltheconstituentsofthebatch,thatisaggr egates,cement,water,admixtures,ice,etc, )d)e)f)g)h)j)k)m) (ifrequired) Allrelays,electroniccomponentsandProgram mableLogicCon-troller(PLC)

10 , , ,thenecessaryiceflakingmachinecompletewi thscrewconveyor,bucketelevator, ,whicharebroad-basedandgeneralized,thema nufacturerorsuppliershallensurethatthepl antshallbecompletewithallthefixtures,ste elstructures,platforms,ladders/stairs,ra ilings,fittings,accessoriesandanyotherma terialrequiredforproper5 f-lIS4925 , , :a)b)c)d)e)f)Completebinstructureofthepl antwiththesupportingcolumns;Supportingco lumnsandsuppottingstructureforthemixers; Concretedumphopper(ifprovided);Allstairs ,ladders,platformsandrailings;Feedingand weighingarrangementoficeflakes(ifrequire d); , ,supportingstructuresofbins(includinghar dwares) , , , , (5000workinghours).