Volume : III, Issue : I, January - 2014

Use of High Volume Flyash in Concrete Pavements For Sustainable Development

Nikhil T. R.

Abstract :

Cement is the second largest material consumed after water. Now a day’s concrete pavements are gaining popularity for its own good paving properties, as such consumption of cement is increased drastically. As cement demand increases, production also increases. Every ton of production of cement releases approximately 7% carbon dioxide to environment. In many industries, including power plants, coal is used as fuel. This generates tones of coal ash, which is very difficult to dispose off, which in turn causes pollution. Thus the production of cement and electricity contributes huge amount of carbon dioxide emissions and coal ash causing environmental pollution. Fly ash contains reactive constituents and unreactive crystalline matter. Reactive constituents reacts with lime and offers hydrated minerals to impart strength and un reactive matter gives packing effect to the concrete, filling up of pores and thus increases the strength. Here an attempt is being made to consume this pollution causing material to a utility by using it in concrete. Whenever concrete is used for pavements it should posses certain properties to suit for pavement like strength, flexure, modulus of elasticity etc. because of all these reason here an attempt is being made to design a concrete mixture for M-40 grade, by using high volume fly ash into it. After the mix design, the concrete is being evaluated for properties such as compressive strength, flexural strength etc. In the design of high volume fly ash concrete use of chemical admixtures is inevitable, and it is proposed to use the super plasticizer. The Economic design thickness and construction cost analysis were performed to know about the cost comparison of different types of pavements. From the studies we observed that at 50% replacement of fly ash maximum durability and strengths were achieved and it was proved to be economical by compå it with Flexible pavements and controlled concrete pavements.

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Article: Download PDF   DOI : 10.36106/ijsr  

Cite This Article:

Nikhil T. R. Use of High Volume Flyash in Concrete Pavements For Sustainable Development International Journal of Scientific Research, Vol.III, Issue.I January 2014

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