IS 4925 (2004): Concrete Batching and Mixing Plant

1 Disclosure to Promote the Right To InformationWhereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. ! $ ' + - 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 !

2 > 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-??7%%wiRJ T 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).))))

3 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;G roundstoragehopper(forsmallerplants);Gro undstoragehopperwithweigh-ingfacilityatb eltconveyo~ )Storagearrangementforcement:Cementsilo, )WeighingArrangements1) 2)3)4)5)6)7)Singleweighingsystemforaggre gatesandcement;Independentweighingarrang ementforcementaswellasforallaggregatesto gether.

4 Independentweighingarrangementforeachtyp eofaggregate;Morethanoneweighingarrangem entforcementtocatertothedifferenttypesof cements;Arrangementformeasurementofwater throughflowmeterorthroughweigh-ment;Addi tionalarrangementsforweighmentoficeflake s; 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);Fullyautomaticcontrolthroughasingle pushbuttonforbatchingofallag-gregates,ce ment,waterandadditives(recommendedforbat chingplantsof30m3/handabovecapacity);Rea dyMixedConcretePlantsReadymixedconcrete( RMC)plantsshallbeequippedwithcomputer(co ntainingminimum15recipes), :1)2)3)4)5)6)7)8)9)10)11)12)13)14)15)16) 17)NameofRMCplantsupplierwithlogoandaddr ess,DeliverynoteNo.

5 ,Nameofreceivingp~y,Orderedquantityinm,R ecipenumber,Numberofbatches,Batchsizeinm 3,Date,Startingtime,Moisturepercentageof eachmaterialatthetimeofbatching,Weighing chartforeachtypeofcom-ponentwithtotalfor eachcomponentindependently,Totalquantity deliveredinm3,Remarkscolumn,Transitmixer numberandcapacity,Transitmixerdriver sname,RepresentativeofRMCplant(signature column),andRepresentativeofcustomer(sign aturecolumn).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.

6 ( );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, ( ).

7 , (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) , , ,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).

8 Allstairs,ladders,platformsandrailings;F eedingandweighingarrangementoficeflakes( ifrequired); , ,supportingstructuresofbins(includinghar dwares) , , , , (5000workinghours). , , , (massinwater)ofcement, ,fineaggregatesandcoarseaggregates(asfou ndbyweighinginwater)inthetwohalvesofabat chandtheaverageofthetwohalvesofthebatchs hallnotbemorethanthefollowinglimits:Ceme nt8percentFineaggregate6percentCoarseagg regate5percent13 GUARANTEEANDWORKMANSHIPN otwithstandinganyqualificationbythecusto mer, ,eitherindesign, IS4925:2004 ANNEXA(Foreword)SPECIMENENQUIRYFORMATA-1 CAPACITYOFTHEPLANTREQUIREDT heindentorshouldworkouthisrequirementass uming75percentefficiencyoftheplantA-2 TYPEOFPLANTREQUIREDT heindentormustindicateanyofthefollowingt ypebasedonsiterequirement:a)Centralbatch ingandmixingwithoverheadstorage(indicate storagecapacity).b) ) )Storagehopperaboveweighhatcher(plantupt o20ins/h).

9 A-3 TYPEOFMIXERREQUIREDT heindentormustindicateanyofthefollowingt ypeofmixerrequiredbasedonsiterequirement :a)Non-tiltingreversibledrumtype,b)Doubl econicaltiltingtype,c)Pantype,d)Singlesh aftftwinshaftcompulsorytypeiPugmilltype, ande) (S)Availablesizesare20,30,45,60,75t(bigg ersizesofsilosavailableforcentralstorage ofcementongroundlevel).A-8 FEEDINGOFCEMENTF eedingofcementcanbedonethroughbucketelev ator,screwconveyor, (ANYOFTHEFOLLOWING)a)Watermeter(mechanic altype),b)Watermeter(electronictype),and c) , (e) ,theindentormustindicatetheheightofdisch argerequired. BureauofIndianStandardsBISisastatutoryin stitutionestablishedundertheBtireauofInd ianStandardsAct,1986topromoteharmoniousd evelopmentoftheactivitiesofstandardizati on, ,inthecourseofimplementingthestandard,of necessarydetails,suchassymbolsandsizes, (Publications), ;astandardalongwithamendmentsisreaffirme dwhensuchreviewindicatesthatnochangesare needed;ifthereviewindicatesthatchangesar eneeded, BISC atalogue and Standards:MonthlyAdditions.

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