Rebars are used as tensile devices in reinforced concrete to give strength and hold the concrete in tension. Apart from strength, rebars are used to absorb energy, adapt to extreme conditions, and hold stress during natural disasters.
Brazing is the joining two or more metals by filling a molten filler metal, or a brazing alloy. The melting point of these alloys is usually above 840°F and below the melting temperature of the base metals that are to be joined. The base metals are heated to temperatures slightly above the liquidus temperature (temperature above which the metal liquidifies) of the filler metal. The filler metal is then placed marginally in the region that has to be joined. The liquefied filler material is permitted to penetrate the joints of the base metals by capillary action.
A biomass boiler is used to generate heat or power from biomass, with less impact on the environment than conventional fuel. Heating and cooling account for almost half of the world's energy consumption. This requirement is fulfilled using conventional sources such as electricity, which is generated from fossil fuels. Power generation from fossil fuels results in the emission of a large amount of CO2, negatively affecting the environment.