TABLE OF CONTENTS - The Professional Green Building Council

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Theme C: Education and Market Transformationof blocks, they are transported to packaging area by the automatic-controlledtransport tower.In the packaging process, as the initial step faulty blocks are determined by thehelp of sensors and removed manually while they are being transported to loadingarea. In the loading area, blocks are stacked onto trailers by a robot and tied bysteel and plastic strips with manually operated tools. As the last step, trailerscontaining block packs are transported to storage area by tractors.Broken/faulty blocks detected after drying process are used as pavement fillermaterial in the factory area to cover the pumice dust lying over the ground.In the storage process, block packs are unloaded by a forklift and stored in anopen-air area until their distribution.In the distribution process, block packs are loaded to trucks by the help of a forkliftand transported either to subsidiaries or directly to construction sites.The machines and equipments, and energy used in the manufacturing processes ofpumice concrete block are summarised in Figure 3.3.3.2. Manufacturing of AAC blocksManufacturing processes of autoclaved aerated concrete block production in theinvestigated factory are mainly: (i) crushing, (ii) mixing, (iii) moulding, (iv)cutting (v) steam-curing, (vi) packaging, (vii) storing, and (viii) distribution.In the crushing process, sand transported by a conveyor, gypsum coming from thesilo mounted on the top of the facility and water are fed to the wet ball mill. Thismix is then transported and stored in slurry tanks having internal stirring deviceswith additional water.In the mixing process, slurry from tanks, return slurry from an auxiliary tank,aluminium powder, lime and cement from silos mounted at the top of the facility,648
Theme C: Education and Market Transformationand water are weighed and fed to mixer by automatic-controlled devices andmixed.In the moulding process, the mixture is filled into the moulds which were earliercleaned and oiled, and is waited for fermentation to expand and to gain sufficientstiffness. In this stage, aluminium powder reacts and released H 2 forms the porousstructure. Thus the material increases in volume about 3-5 times depending on thedensity of the final product. About 70 minutes later, stiffened AAC cake is demouldedand transported to waiting area to gain additional stiffness for cutting.PUMICE CONCRETE BLOCKMANUFACTURING PROCESSESCRUSHING PROCESS (Optional)Sub-Processes Machine/Equipment Energy InputSieve / Crush Sieve chrusher ElectricityTransport aggregate Conveyor-Elevator ElectricityTransport processed Weigher (cement) Electricitybasic materials(cement, water)MIXING PROCESSSub-Processes Machine/Equipment Energy InputMix Mixer ElectricityElectronic control units Electricity(controlling water ratio)MOULDING PROCESSSub-Processes Machine/Equipment Energy InputInject Press ElectricityBurr Rotating brush ElectricityTransport to drying Transport tower Electricitychamberand control unitsDRYING PROCESSSub-Processes Machine/Equipment Energy InputDrying Heater (winter period) CoalTransport to packaging Transport tower and Electricitycontrol unitsPACKAGING PROCESSSub-Processes Machine/Equipment Energy InputFault control Sensors ElectricityTransport Conveyor ElectricityStack Robot ElectricityTie Compressor gun ElectricityTransport Tractor Diesel fuelSTORAGE PROCESSSub-Processes Machine/Equipment Energy InputUnload Forklift Diesel fuelDISTRIBUTION PROCESSSub-Processes Machine/Equipment Energy InputLoad Forklift Diesel fuelDistribute Truck Diesel fuelFigure 3: Manufacturing processes of pumice concrete blocks.649
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Funding OrganisationCOMMERCE AND EC
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Ms. S.Y. Shum, Anna, Lecturer, Divi
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以绿色思维创新绿色
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ENHANCING SUSTAINABILITY DELIVERABL
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Theme A: Connecting the Pearl River
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精宜之道 ”。所谓 “
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to use suitable technology. Additio
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Theme B: Creating a livable, health
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Average Credit4.03.83.63.43.2Averag
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Theme C: Education and Market Trans
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TABLE OF CONTENTS - The Professional Green Building Council

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