Use of Fly Ash in Dam Construction
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PRESENTED BY:
Subhash Chandra

[attachment=13385]
Use of Fly Ash in Dam Construction
1. India
2. Japan
3. Malaysia
4. Other
1. India
 The Ghataghar Dams Project is located on the boundary of the Thane and Ahamadnagar districts of the Maharashtra State.
 Three dams have been constructed: the Upper Dam, the Lower Dam and the Saddle Dam.
 Country's first RCC (roller compacted concrete) dams.
Roller Compacted Concrete
• It is named from the method used for construction.
• It is a zero slump concrete having same basic ingredients
• It is transported by dump trucks, spread by dozers and compacted by vibratory rollers.
• The main contractor for the roller compacted concrete dam work is Patel Engineering Ltd of Jogeshwari, Mumbai.
• 250 MW Ghatghar Hydro Electric Pumped Storage Scheme
• First time, the Ghatghar project used 60 per cent fly ash in the mixture.
• The results were better than expected. Then the fly ash proportion was increased to 70 per cent.
• The concreting of the main Roller Compacted Concrete (RCC) dam started in December 2004 and completed in June 2006.
• A total of 6,43,000 cum. of RCC was placed in 12 working months at approx. speed of 54,000 cum per month.
• The Ghatghar RCC Dam is among the top 10 fastest RCC dam completed in the world.
2. Japan
 In Japan, production of fly ash in 2006 was 11 million tons
 And 10.7 million tons (97.2%) was used
 RCC Dam - in Japan, usually used “RCD”)
 This technique was first applied at Ohkawa Dam in 1976
 Fly ash replaced from 20 to 30 %
 The content of the cement and fly ash for RCD was 120 kg/m3
 The rate of construction by RCD method is similar to that of RCC method in USA or China
 It was realized that the reduction of 9 % of construction cost and 13 % of construction period
 Shimajigawa Dam in 1980
 Tamagawa Dam in 1987
 Initially thickness was kept 500 mm for 1 lift.
 Then the thickness of 1 lift becomes 750 mm in 1990
 Recently 1,000 mm on the economical viewpoint
3. Indonesia
 The Sg. Kinta Dam located approximately 12 km of north east of Ipoh City
 It was part of water supply scheme and completed in March 2006
 The Dam at a height of 85m was the 1st RCC Dam in Malaysia
 The mix was prepared - contained 100kg of a portland cement and 100kg of fly ash per cubic metre of RCC.
 The Sg. Kinta Dam consumed about 100,000 tonnes of fly ash
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