Full Automatic AAC Concrete Block Making Machine. Keda AAC Plant


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WHAT IS AAC The AAC production process includes raw material preparation. batching and mixing. pouring. precuring. cutting. autoclaving. and packing. With decades of experience in serving the AAC blocks production machinery industry. we can supply customers with quality AAC block production lines with capacity ranging from 80.000m3 to 40.000m3 per year.Chart 1 the parameter of the processesProcessesParameterMixing period5-6 minutesPouring slurry temperature40-45ºCCake curing time2.5-3.0hCake curing temperature45~55ºCCake strength after curing0.15~0.18MPaAutoclaved curing system Before-after autoclave0.5hVacuumize0.5h(0~-0.06MPa)Listing pressure1.5h(-0.06~1.3MPa)Constant pressure8h(1.3MPa)Releasing pressure1.5h(1.3~0MPa)total12h  RAW MATERIALS  Siliceous materials : Sand / Fly ash / Tailings containing silicon / Ceramic waste Calcareous material: Lime block cement gypsum Others: Aluminum powder paste  THE ADVANTAGES OF AAC:1. Low density : Can be 325kg /m32. Good thermal insulating properties3. Cost few time to build. saving time4. Easy to operate . saving labor cost5. Good performance of preventing fire 6. Good sound-insulation properties7. Durable . anti-seismic . recyclableCUTTING SYSTEM Special cutting design : All the steel wire columns are fixed on two main oblique  beams of cutting machine and each pair of the columns is used to fix only one steel wire . so that the horizontal  cutting machine can avoid the settlement cracks problem in thin block and panel cutting . and achieve the minimum horizontal cutting thickness of 50MM block out of a whole mould. The integral swing frame of the vertical cutting machine can ensure the side plate replacement . the cutting action can be synchronized with ferry replacement. With automatic detection system . the broken wire can be timely detected. PACKING SYSTEM Automatic packing system can realize the automatic rotation stacking and splicing of blocks and  realize the packing function with pallet or non-pallet. The stacking specification can realize 1.2m×0.6m 1.2m×1m 1.2m×12m 1m×0.6m multiple  stacking . and the height of the stacking can be 1.2m. 1.5m . 1.8m and 2.4m. AAC FINAL PRODUCTS 1.Product classificationProduct classification is according to national standards GB/T 11968-2006 AAC block. also can be according to user's requirements to produce product with special specifications size. Chart 2 Specification & IndexNameAAC blockWeight300~600 Kg/m3(control led by formula)After autoclave compressive strengthaverage value≥3.5MPa. Min. value<=2.8MpaDrying shrinkage valueMeasured under condition of rapid method≤0.8mm/m;Measured under condition of standard method≤0.5mm/mFrost-resistanceAfter the cycle of freezing and thawing for 15 times.weight loss≤ 5%.strength loss≤ 20%Coefficient of thermal conductivity≤0.14~0.16W/m.k 1.2 The block is classified by compressive strength and volume density.Strength level: A1.0. A2.0. A2.5. A3.5. A5.0. A7.5. A10.Dry density level: B03. B04. B05. B06. B07. B08.  1.3 Block levelThe block is divided into high-class(A). first-class(B). qualified product (C) according to the size variation. appearance quality. dry density. compression strength & frost-resistance.  1.4  AAC Block indicatorChart 3  Size variation& appearanceProjectIndicatorHigh-class(A)Qualified product(B)Permissible variation of dimensionmmLengthL±3±4WidthB±1±2HeightH±1±2Missing angleThe min. size not more than /mm030The max. size not more than /mm070Missing angle no. larger than the above size. not more than02Crack lengthThe crack length through one edge and two surfaces not more than crack directional size sum on crack surface01/3The crack length of any surface can not be larger than crack directional size01/2The cracks larger than the above size. not more than030The depth of cracking. sticking. damage can not be more than/mm01030Plain bendingNot allowedSurface porosity. lamination crackNot allowedSurface oilNot allowed  Chart 4  Cubic compression strength for block  Strength levelCubic compression strength (MPa)Average not less thanSingle group min. not less thanA1.01.00.8A2.02.01.6A2.52.52.0A3.53.52.8A5.054.0A7.57.56.0A10.0108.0  Chart 5  Dry density for block(kg/m3)Dry density levelB03B04B05B06B07B08Dry densityHigh-class (A)≤300400500600700800Qualified product (B)≤325425525625725825  Chart 6  Strength level for blockDry density levelB03B04B05B06B07B08Strength levelHigh-class (A)≤A1.0A2.0A3.5A5.0A7.5A10.0Qualified product (B)≤A2.5A3.5A5.0A7.5

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