![]() ![]() Grade A: These are used as load bearing units and shall have a minimum block density of 1500 kg/m 3.The hollow (open and closed cavity) concrete blocks shall conform to the following two grades. Table 1: Minimum face shell and Web Thickness Classification: The thickness of the face shell and web shall be not less than the values given in Table 1. The variation in the length of the units shall not be more than ±5 mm and variation in height and width of units, not more than ± 3 mm. Width: 50, 75, 100, 150, 200, 250 or 300 mmįull length and half-length U-blocks may also be manufactured for the purposes of band and lintels.Dimension and Tolerance: The nominal dimensions of concrete block shall be as follows. Concrete masonry building units which are used in the construction of load-bearing and partition walls such as Hollow and Solid load-bearing and non-load bearing concrete blocks shall conform to the IS: 2185-1 (2005). Concrete masonry units are used for both load-bearing and non-load bearing walls, partitions and panel walls. It has many advantages, such as durability, strength and structural stability, fire resistance, insulation, sound absorption and economical construction. Lower density blocks may use industrial wastes as an aggregate. Portland cement and aggregate, usually sand and fine gravel for high-density blocks. Concrete blocks are made from cast concrete, e.g.
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