
Standard Specifiions of Hollow and Solid Concrete Blocks
3. Classifiion of Concrete Blocks. The hollow concrete blocks shall be classified in the following four types: 1. Grade 'A' These are used as loadbearing units and shall have a minimum blockdensity of 1500 kg/m 3. The concrete blocks shall be manufactured for minimum compressive strengths of,,, and N/mm 2 respectively ...