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1st | 3rd Floor, Pashupati Vision Building, Pingalasthan, Gaushala, Kathmandu

APPLICATION GUIDELINES

The blocks shall be stored in such a way as to avoid any contact with moisture on the site. They shall be stock piled on planks or other supports free from contact with the ground and covered to protect against wetting.

Do not use tools like hammer, chisel etc. to cut the blocks. Use a carbide tipped saw to cut the AAC blocks smoothly and accurately.

The blocks shall be embedded with a mortar, the strength of which is relatively lower than that of the mix used for making blocks in  order to avoid the formation of cracks. A 1:6 cement-sand mortar may be used.Keep mortar thickness  limited to 10 to 12 mm in cement sand mortar & 3 to 4 mm in ready mix mortar.

These blocks need not be wetted before or during the laying in the walls; in case the climatic condition so required, the top and the sides of the blocks may be slightly moistened so as to prevent absorption of water from the mortar and ensure the development of the required bond with the mortar

The blocks shall be embedded with a mortar, the strength of which is relatively lower than that of the mix used for making blocks in  order to avoid the formation of cracks. A 1:6 cement-sand mortar may be used.Keep mortar thickness  limited to 10 to 12 mm in cement sand mortar & 3 to 4 mm in ready mix mortar.

Bond beams, the use of which as structural members also serve as a means of crack control. Provide nominal bond beams of thickness 80 mm with a minimum reinforcement of two 8 mm diameter mild steel bars or two 6 mm stirrups at 200 mm c/c and filled with M 20 grade of concrete. The reinforcement shall be embedded in horizontal joints at intervals of 900 to 1200 mm depending upon panel length, height, and the number and type of wall openings. If the length of wall exceeds more than 3 m, vertical reinforcement should be provided at suitable intervals.

Coping beams with 2 nos 8mm reinforcement after 1.3 mts. height

When two load bearing walls meet or intersect and the courses are to be laid up at the same time, a true masonry bond between at least 50 percent of the units at the intersection is necessary. When such intersecting bearing walls are laid up separately, pockets with 200 mm maximum vertical spacing shall be left in the first wall laid. The corresponding course of the second wall shall be built into these pockets.

Curing required only for mortal joint when conventional mortal used

Chases to be de-grooved before plaster of wall

Wire Mesh & Chemical grout to be provided

Plaster thickness required Internal: 6 to 12mm, External 12 to 15mm. Plastering can be done at construction site as per standard masonry practice generally after 7 days, conducting and chiseling can be done generally after 14 days.

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