Fly Ash Essay

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Chapter I
Introduction

1) Introduction
2) Fly ash an overview
3) Classification of fly ash
4) Impact of fly ash on environment
5) Remedies
6) Uses of fly ash
7) Strength of flyash
8) Stabilization of flyash
9) Lime an overview
10) Issue for the millennium

INTRODUCTION
Disposal of residual waste is one of the greatest challenges faced by the manufacturing industries in India.The waste products which are produced from these industries are generally toxic in nature, are easily ignitable and corrosive orare reactive easily and thereforecause detrimental effects on the environment. Thus disposal of these wastes properly is one of the major concernsto be dealt with in the present generation. An innovative solution which would be effective, efficient and environmentally approved is required to overcome this problem of disposal. One of the solutions which are applicable is utilization of waste products from one industry as raw materials of some other industries, and hence reducing the burden on the environment. Many industrial wastes are utilized in construction industries. If this supply chain is maintained properly then it would enable the organizations to reduce the disposal problems to a great extent. The wastes can be used in construction of highways, embankments etc.Another problem that exists is that there no sufficient amount of soil of desired quality which is required for the construction purposes. The search for desired quality of soil again leads to deforestation and hence affecting soil erosion and agriculture productivity. Cost of increase in good quality raw materials is also increasing to a high level. So efficient and effective utilization of the waste materials that is used as a substitute for the natural ...

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...ction, some soils can produce very high strength gains when limetreated. very substantial improvements in shear strength (by a factor of 20 or more in somecases), continued strength gain with time even after periods of environmental or load damage(autogenously healing) and long-term durability over decades of service even under severeenvironmental conditions.

Use of Fly ash
Some of the application areas of Fly ash are given below.

• Manufacture of Portland cement.
• Embankments and structural fill.
• Waste stabilization and solidification.
• Mine reclamation.
• Stabilization of soft soils.
• Road sub base.
• Manufacture of bricks
• Aggregate.
• Flow able fill.
• Mineral filler in asphaltic concrete.
• •Application on rivers to melt ice.
•Used as a sub-base product in pavement design.
•Other applications include cellular concrete, geo polymers, & roofing tiles

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