aac block work procedure

Because of reduction in self-weight, AAC block construction attracts less earthquake load. Opening and odd angles should be cut with a handsaw. 2) Smoothing over the block work: Before placing mixed mortar, apply a bonding layer of 1 to 2mm thick AAC Block Adhesive mortar using a trowel pressing down on the block work. First a fall, autoclaved aerated concrete is produced by mixing silica or sand or fly ash with cement, lime, water, and expansion agents such as aluminum powder. 3.10 ‘Solid Block — A block which has solid material not less than 75 percent of the total volume of-the block calculated from the overall dimensions. The depth and size of the foundation will vary depending on the size of the concrete block wall and the weight it must support, but a typical freestanding wall requires a foundation that is about twice as wide as the wall itself and which extends about 1 foot down below the frost line. AAC Block: Clay Brick: Size: mm: 600 x 200 x (75 to 300), 230 x 75 x 115: Size Tolerance: mm ± 1.5 ± 05 to 15: Compressive Strength: N/mm 2: 3 – 4.5 (IS 2185 part 3) 2.5 to 3.5: Normal Dry Density: Kg / m 3: 550 – 650: 1800: Sound Reduction Index: Db: 45 for 200 mm Thick Wall: 50 for 230 mm Thick Wall: Fire Resistance: Hrs. The inner & outer walls are interconnected by means of … 3.11 Webs — The solid sections of the hollow concrete blocks which connect the face shells. Thin joint concrete common block work shall be manufactured in accordance with BS EN 771: Part 3 and tested in accordance with BS EN 772. Mtr: Number of Blocks : Nos. AAC was developed in 1924 by a Swedish architect, who was looking for alternate building material with properties similar to that of wood – good thermal insulation, […] AAC Block Specifications Composition. AAC Block laying process is almost similar to brick masonry only a few differences are there . Follow the checkout process, ensuring you attach your company logo in a high resolution JPEG format for inclusion in the online safe work method statement/job safety analysis. Lime – 8%. Scaffolding to be braced adequately. The placed mixed mortar on the block work in 3mm (As per required by consultant or Engineer) using trowel and place the next layer of blocks on the mortar. 3. DETERMINATION OF WATER ABSORPTION Three full size blocks shall be completely immersed in clean water at room temperature for 24 hours. 3.1.Adhesive is prepared to conform to consistency and preparation in accordance with requirements and manufacturer recommendations. 3.2.Adhesive is applied to AAC blocks to maintain full joints at specified thickness in accordance with manufacturer specifications. Although AAC blocks are porous, the pores are not interconnected so the water absorption is relatively less as compared to clay bricks. • They are easy to install and can complete the construction procedure in a shorter span in case of scarcity of labour and in the usage of mortars. 2.0 Scope This work procedure covers AAC masonry work to be executed in the substructures/super structures of different buildings as specified in the approved drawings. Mtr: Area of the Wall : Sq. The low dry density of AAC blocks reduce the load on the foundation and other structural components in a structure leading to 55% reduction in weight of walls. : WORK PROJECT: Page 1 of 6 1.0 Objective To provide general instructions for AAC Block masonry works at site. Laying of AAC Block masonry shall be as per IS 6041 of 1985 and IS 1905 of 1987. The width of AAC Block joints to be approximately 3mm with the mortars (as per required by the engineer). Add the safe work method statement, job safety analysis or safe operating procedure and any additional swms's, jsa's or sop's you require to the shopping cart. We are the only Autoclaved Aerated Concrete (AAC) provider that manufactures their product in the United States! Autoclaved aerated concrete (AAC) is a lightweight, precast, foam concrete building material suitable for producing concrete masonry unit (CMU) like blocks. Restraint Posts:-All restraint post around windows shall be provided as per approved shop drawings, during the AAC block work construction. Height of the stack should not be more than one and half meter. AAC Block Prices . Origins. During the several phases of this study, some care was taken to improve the procedure. AAC Bricks Installation, AAC Blocks Installation, aac block work procedure read more Presenting 2. 3.2.1 The nominal dimensions of the concrete block shall be as follows: I,ength 400,5000r600mm Height 200,250 or 360 mm Width 100,150,200 or 250 mm In addition, block shall be manufactured in half lengths of 200,250 or 300 mm to corresponcl to the full lengths. If multiple courses of U-Block are used, notching is required to allow concrete to get to the lowest course. The nominal dimensions of the units are so designed that taking PROCEDURE Constructed in two leaves- inner & outer with a hollow space in between them. ECO PANEL (AAC) are also steel reinforced AAC … Safety and Protection Blocks shall be stacked properly near the place of work (Do not stack too large quantity near the work area thereby causing safety hazard). could be easily used to cut and align the AAC. AAC Block vs Brick (m²/ worker/ day) Thermal Control Built using Bricks Built using AAC Products 25% less foundation required Save up to 25% of Foundation Cost Brick vs AAC Block 1 2 3 5 Heat insulation 6 times superior than clay brick Note : Building uses approximately 30% less energy for cooling and heating the interior air space. AERCON AAC is the leading manufacturer of Precast Autoclaved Aerated Concrete Products and prides itself on maintaining the highest level of customer service and support. Application Procedure. Cement (usually OPC grade 53) -33%. AAC typically weighs one-sixth to one-third as much as conventional concrete, and is … The density of each block calculated as follows: Density in kg/m 3 = Mass of block in kg/Mass of block in cm 2 * 10 6. AAC blocks need to be tested in a certified lab before you construct a house. Material specifications for AAC are prescribed in ASTM C1386. 3. The width of cavity is constant with a suitable value between 40 to 100 mm & cavity is continuous in vertical direction expect at lintel on openings. Wo Since all brick/block work is waterproofed plastered externally you should not be worried about the dampening of internal walls. 3.3.AAC block is laid in running bond and set out to Hence, few experiments with this kind of reading have been reported. This mortar does not require any curing post application. Bond beams should be placed at the top of the wall and we can use it for heavy-duty fixture attachment. Always pre-wet the u-block before pouring the grout. The Autoclaved Aerated Concrete (AAC) material was developed in 1924 in Sweden. AAC Blocks is lightweight and compare to the red bricks AAC blocks are three times lighter. • Aerocon block is extremely light, just one-third the weight of clay bricks or one-fourth the density of R.C.C. 2. The cost of chemical depends. Fly-ash – 59%. Working Guidelines for AAC Blocks. It is a specially formulated mortar that replaces conventional site mixed Cement - Sand mortar. They are much easier to handle on the site. The minimum compressive strength shall be 7.5 N/mm2 for non-load-bearing block work and 12.5 N/mm2 for load-bearing block work, using Sulphate Resisting Cement and This pictuorial guide line easy to understand and you will get whole idea about its working. Speed Dry Mix - AAC BLOCK JOINTING MORTAR is a high quality Premixed mortar suitable for fixing AAC/ALC/CLC blocks. Dry density of AAC block varies from 451 kg/m 3 to 1000 kg/m 3. Moreover, the AAC blocks come with larger sizes and fewer joints. Presentation on how to do AAC Blockwork 1. The ECO PANEL (AAC) system is an innovative Autoclaved Aerated Concrete light -weight cement-based material, incorporating small uniformly distributed bubbles that result in its unique properties of lightness, high thermal resistance, workability and streng th. Openings. How to Do AAC Blockwork 3. 3.0 Materials 3.1 AAC Concrete blocks (light weight) … These allow the insulating properties of AAC blocks to be continuous across the wall face and can facilitate the placing of subsequent door and window fasteners. Basic AAC block in the standard size of 8 x 8 x 24 inches costs about $2.20 to $2.50 per square foot as of July 2018, slightly more than standard concrete block, which costs about $2.00 per square foot. AERO BLOCK AAC Blocks Grade A. AAC consist 80% air by volume, making it lightest available walling material (Weight 1/3rd that of clay bricks).Formed as a result of reaction of Aluminum on a proportionate blend of lime, cement & Flyash, the hydrogen gas that escapes creates millions of tiny air cells giving it a strong Honeycomblike structure. As the AAC block is very easy to handle, manipulate and use ordinary tools for cutting the wood such as the drill, band saws, etc. RFIA will be raised to the Engineer to check the work before concreting of tiffener/bonding columns. Autoclaved Aerated Concrete is a Lightweight, Load-bearing, High-insulating, Durable building product, which is produced in a wide range of sizes and strengths. Scope: The intention of this document is to describe the various steps involved to be carried out to execute the Block works to meet the requirements of Specifications. Testing assures the quality of AAC block… 3) As Adhesive to install tiles: Method Statement for Block Works in a Quality Management System are given below: 1. Then apply AAC Block Adhesive at a thickness of 8 to 10mm and smoothen usi ng a sponge or rubber / wooden float. WORK PROCEDURE FOR AAC BLOCK MASONRY Work Procedure No. Aluminum powder – 0.07%. The whole-block specimen with top and bottom gauges was shown to be inadequate. However, labor costs for AAC can be lower because its lighter weight makes it easier to handle and install. Typical block work details will be resubmitted for the Engineer approval. BOM for making a wall with Duralite: Volume of the Wall : Cu. Article shared by. Lay AAC blockwork. However, many manufacturers do not ensure proper steam curing while manufacturing the blocks in a factory, because of which sometimes shrinkage cracks may occur. Although the ASTM C426 procedure permits top and bottom gauges, they are not used very often for concrete blocks. Step by step working guide line for AAC Blocks. AAC was developed in 1924 by a Swedish architect, who was looking for an alternate building material with properties similar to that of wood – good thermal insulation, solid structure and easy to work with – but without the disadvantage of combustibility, decay and termite damage. Foundation.All concrete block walls must rest on a sturdy foundation of poured concrete. Autoclaved Aerated Concrete is an eco-friendly and certified green building material which is lightweight, load-bearing, high-insulating, durable building blocks and 3 times lighter when compared to red bricks. 1.8. 4. Autoclaved Aerated Concrete (AAC) is a lightweight, concrete-like material with many small, closed internal voids. Ensure to read the brickwork construction procedure provided by the client ; Cement mortar ratio should be 1:6 for 9” Brickwork and 1:4 41/2” brickwork ; Mortar thickness should not be more than 10 mm between the courses and sides of the bricks; Ensure you are … Manufacturing Process of AAC Block. Mortar - Duraseal (40 Kg Bag) Bags : Clear 1. The blocks shall then be weighted in kilograms to the nearest 10 gm. FEATURES AND BENEFITS Formulated to comply with Concrete blocks which connect the face shells and odd angles should be placed at top. Height of the wall: Cu three full size blocks shall be provided as per approved drawings. 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