Baystar Keyatala, Kolkata, West Bengal

  In May 2007, Henry Liu, a retired civil engineer, announced that he had invented a new brick composed of fly ash and water compressed at 4,000 psi (27,939 kPa) for two weeks. Owing to the high concentration of calcium oxide in fly ash, the brick is considered "self-cementing". The brick is toughened using an air entrainment agent, which traps microscopic bubbles inside the brick so that it resists penetration by water, allowing it to withstand up to 100 freeze-thaw cycles. Since the manufacturing method uses a waste by-product rather than clay, and solidification takes place under pressure rather than heat, it has several important environmental benefits. It saves energy, reduces mercury pollution, alleviates the need for landfill disposal of fly ash, and costs 20% less than traditional clay brick manufacture.   Advantages   DurableLow water absorptionLess consumption of mortarEconomical & eco-friendlyLow energy consumptionNo emission of green house gases      

Usage : Substitute Of Clay Bricks

Hollow block; also called concrete block, cement block or foundation block is a large rectangular brick used in construction. Concrete blocks are made from cast concrete, i.e. Portland cement and aggregate, usually sand and fine gravel for high-density blocks. Concrete blocks are produced with hollow centres to reduce weight snd improve insulation. The use of blockwork allows structures to be built in the traditional masonry style with layers (or courses) of overlapping blocks. Concrete block, when reinforced with concrete columns and tie beams, is a very common building material for the loadbearing walls of buildings, in what is termed "concrete block structure" (CBS) construction. Large buildings typically use copious amounts of concrete block. The holes inside concrete block allow rebar and concrete (creating reinforced concrete) to run vertically through the block to compensate for the lack of tensile strength.  

Hume Pipe also known as Precast concrete pipe is the strongest pipe available. It was invented by John Hume, a citizen of the United States.

A paver block is a moulded rectangular block of clay or concrete baked in a kiln or made in machines until hard. It is interlocking in nature and is multishaped, multi-colored piece commonly used in exterior hardscaping applications.