If the builder is big enough and is having own recycling process unit, he can use the recycled material in other constructions and can save investment on the constructions, which again reduces the construction costs. Regarding this positive evaluation, we must limit ourselves to reducing the construction costs only. This is because this is not the point to consider about the pollution involved in the recycling process and it will be considered separately.
In the modern constructions the construction waste management at the site was considered as important component to increase sustainability of the building. The demolition debris and construction waste were the components that should be managed or recycled.1
The inclusion of the management along with recycling is due to the fact that only 20 percent of the waste was being recycled and the remaining waste is managed in the processes like land filling. The waste disposal causes an array of adverse effects. They are not felt by the people who are in building profession. They are now aware of the loss of the property, the materials wasted, embodied energy and the green house generation. All these things cause the environmental stressors, which are associated with giving rise to new materials. This stops usage of existing material. At present due to the decrease of land fills for the construction and demolition waste, the expenditure of the waste management was being increased. The higher distances that are to be travelled for hauling are increasing the fuel cost for the transportation. The fact that only 20 percent was being recycled, poses an opportunity of larger potential for the development in this sector. The recycling will ensure the availability of the resources for the future use.
William McDonough considers waste as food in his book cradle to cradle. He tells this from the fact that the waste generated in the construction is the food for the industry (raw material). This usage of waste as food depends on technology available for the industry in using the waste as raw material.
The important factor that can be considered before the management or the recycling of the waste is reusing. The waste from the demolition can be used on site or on the site else where. The wood materials can be used easily without any need of extra technology for the making of wooden articles required for the new construction.
The gravel and aggregate products can be used in mixing concrete, but not all the gravel that is recovered from the debris. The gravel that contains minimum impurities can be used and the remaining can be sent for land filling or recycling plants.
A part of the concrete that is obtained from the demolition can be used in filling the land and it finds very less usage in the construction site from where it was obtained. This can be sent for recycling or land filling. It will not find much use in the immediate construction.
The bricks, stones and other masonry material, which is part of the demolition debris, can be used in the immediate construction if they are in good condition. For this purpose, care should be taken while