![]() ![]() are fixed, the voids left shall be filled up with cement concrete 1:3:6 and neatly finished. of the required size and shape or fixing pipes, service lines, a separate passageway for water shall be formed in the masonry with special concrete blocks while laying. Holes, sleeves, chases, openings, etc.The holdfasts shall be driven into the joints of the block masonry during laying.in the concrete block masonry shall be built into the masonry in cement and coarse sand mortar 1:3 while laying the blocks. Fixtures and Fittings in Concrete Block Masonry It should be covered with a thick coat of whitewash or crude oil to ensure free movement of the slab. The top of the roof course built using solid concrete blocks shall have a smooth finish with a layer of cement sand mortar of 1:3 and 10 mm thickness. The concrete course below the roof slab and top of the roof course must be built using solid blocks. Provisions for Roof in Concrete Block Masonry In case of jambs of very large doors and windows, either solid concrete blocks or the hollow blocks shall be filled in with concrete of mix 1:3:6 using 12.5 mm nominal size aggregates. The course shall extend for at least 20 cm beyond the opening on either side. ![]() Provisions for Door and Window Frames in Concrete Block MasonryĪ solid concrete block masonry course shall be provided under door and window openings (or a 10 cm thick precast concrete sill block under windows). Care must be taken during construction to ensure that the edges of the blocks are not damaged.Ĥ.For battered faces, bedding shall be at right angles to the face unless otherwise directed.Precast half-length closers (and not cut from full-size blocks) shall be used.The concrete blocks shall break joints with those above and below for not less than a quarter of their length.All the concrete block courses shall be laid truly horizontal, and all vertical joints made truly vertical.Mortar shall be spread over the top surface of the previous course, creating a uniform layer with a minimum thickness of 10mm and not exceeding 12mm.The concrete blocks shall be laid in the mortar of the required mix as specified and thoroughly bedded in mortar.In places with high temperatures, the sides and the top of the blocks shall only be moistened to prevent the absorption of water from the mortar and ensure the formation of the required bond with the mortar. The concrete blocks need not be wetted before or during laying in the walls. In this article, we discuss the procedure for constructing a masonry using concrete blocks. The standard specifications of the hollow and solid concrete blocks used for the construction of masonry are explained in the article- Standard Specification of Hollow and Solid Concrete Blocks Fig 1: Construction of house using Concrete Block Masonry. ![]()
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