Recent Technologies Using Waste Materials/Byproducts For Sustainable Development
| Autor: | Satander kumar |
|---|---|
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | IOSR Journal of Mechanical and Civil Engineering. 5:26-33 |
| ISSN: | 2278-1684 2320-334X |
| DOI: | 10.9790/1684-0542633 |
| Popis: | Sustainability and long term performance of concrete structures are the two important criteria with respect to the prevailing environmental conditions. Sustainability can not be sacrificed to attain high strength. High ultimate strength is generally accompanied by a low W/C ratio. This is not, in itself, adequate to satisfy all sustainability related requirements. All types of concrete used in different applications must provide acceptable frost resistance, repeated heat resistance, sufficient fatigue life and adequate serviceability. Such concretes are made with the use of mineral admixture by partly replacing Portland cement or aggregate. Good quality fine particles of waste materials or byproducts particularly mineral admixtures and superplasticizer make the cement concrete sustainable with improved long term performance because of least permeability and very slow chemical reaction with harmful compounds present in the concrete. Granulated blast furnace slag, fly ash and silica fume are the major mineral admixtures which are byproducts of the steel, power and alloy industries which do not require much further processing (grinding or heating etc.) before their use in the concrete except in case of granulated blast furnace slag which need only grinding. Even, the energy consumed by these mineral admixtures and other byproducts of the Industry could be re-utilized also. Minimum use of natural resources and recycling of unused materials are key elements in sustainable development. Unprecedented rise in our urban population, traffic population and a rapidly changing construction scenario have put tremendous pressure on available resources and carrying capacity of our ecosystem. The paper deals with the studies showing the ability of the concrete containing waste materials as compared to conventional concrete, to protect embedded steel from corrosion and concrete from other environmental effects for a very longer service period. |
| Databáze: | OpenAIRE |
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