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1、ConcreteConstruction 7steps batching mixing transporting placing consolidating finishing curing BatchingandMixing 1 Batchingtheprocessofproportioningcement water aggregates andadmixturethemosteconomicalmix thehighestratioofaggregatetocement Componentsofconcrete Properties 2 Mixing 2kindsofmixing han
2、dmixing mechanicalmixinggravel cement sandandwater last specifiedspeedrevolution mixingplant agitatinglorry transportingmixer mixer Transporting toavoidsegregation1 Wheelbarrowsshortdistance smallamount 0 04 singlewheel 30 50m doublewheel 100 300m 2 Buggies fromthemixertotheplacingposition Pushbuggi
3、es0 17 0 31 300m Poweredbuggies0 38 400 1500m 3 Chutes fromthemixertohaul offunitsforplacingconcreteintoforms 4 Conveyors eitherhorizontallyorvertically 5 Pumps movingconcretefromatruckdirectlyintofinalposition152mtruck mountedconcretepumps 6 Buckets7 Trucks PlacingandConsolidating 1 Placingthemovem
4、entofplasticconcreteintoitsfinalpositionforms cleanandtightformoilorapartingagentshotcretetremie 2 Consolidating removingairvoidsvibratorhandroddingorspadingimmersion typeelectric pneumatic orhydraulicconcretevibrators FinishingandCuring 1 Finishingbringthesurfaceofconcretetoitsfinalpositionandimpartthedesiredsurfacetexture Screeding strikeoff Floating smoothandcompactthesurface Troweling steeltrowel Brooming 2 Curing providetherequiredwatermaintainafavorabletemperature withwetstraworburlap pondingwater withpaperorplasticsheets applyingcuringcompounds
