Subhash Chandra NTPC - Potential of Fly ash in Dam

Use of Fly Ash in Dam Construction:

2/25/2011 1 Use of Fly Ash in Dam Construction Presented BY Subhash Chandra Sr. Engineer (AUD)

Slide 2:

2/25/2011 2 Use of Fly Ash in Dam Construction 1. India 2. Japan 3. Malaysia 4. Other

Slide 3:

2/25/2011 3 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. 1. India

Slide 4:

2/25/2011 4 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.

Slide 5:

2/25/2011 5 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. Cont…

Slide 6:

2/25/2011 6 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. Cont…

Slide 7:

2/25/2011 7 Upper dam of Ghatghar Pumped Storage Scheme constructed with RCC ( 65% replacement of cement with fly ash) Cont…

Slide 8:

2/25/2011 8 Hauling RCC Cont…

Slide 9:

2/25/2011 9 View of Lower Dam of Ghatghar pump storage scheme Cont…

Slide 10:

2/25/2011 10 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

Slide 11:

2/25/2011 11 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 Cont…

Slide 12:

2/25/2011 12 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 Cont…

Slide 13:

2/25/2011 13 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

Slide 14:

2/25/2011 14 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 Cont…

Slide 15:

2/25/2011 15 Sg. Kinta Dam Cont…

Slide 16:

2/25/2011 16 4. Other Countries Horse Ford Creek Fly Ash Reservoir – USA Muskingum River Plant Upper Reservoir – USA Tanners Creek Fly Ash Pond in Indiana – USA Willow Creek Dam – USA Copperfield Dam – Australia Sankyo Dam - China

Slide 17:

2/25/2011 17 Lower Jurala Hydro Electric Scheme (6x40MW) is proposed on river Krishna 7.9KM down stream of existing Priyadarshini Jurala Dam near Mulamalla, Mahaboonagar (District). The project is under construction since 14.07.2008 RCC M20 grade using 20MSA concreting of 506 Cum is done against total concrete quantity of 10,000 Cum RCC M20 grade using 40 MSA concreting of 44087 cum is done against concrete quantity of 1,60,000 cum Potential of use of ash in Dam Construction Lower Jurala HEP AP

Slide 18:

2/25/2011 18 APGENCO is planned to add 653MW Hydel capacity by next three years i.e. by 2012-13 from Lower Manair Dam In similar way, other state also have their plan to increase hydel capacity Cont…

Slide 19:

2/25/2011 19 Cont… State wise Under Construction Hydro Power Projects & Proposed Hydro Power Projects

Slide 20:

2/25/2011 20 Cont…

Slide 21:

2/25/2011 21 Arunachal Pradesh Subansiri Lower HEP Nyamjang Chhu HEP Kameng HEP Demwe Lower HEP Pare HEP Etalin HEP Tawang-I HEP Tawang II HEP Talong HEP Subansiri Middle HEP Subansiri (Upper) HEP Dibang Multipurpose HEP Jammu & Kashmir Kishanganga HEP UJH HEP Nimoo Bazgo HEP Pakal Dul HEP Chutak HEP Bursar HEP Sewa HEP- Stage-II URI HEP- Stage II Cont…

Slide 22:

2/25/2011 22 Cont… Himachal Pradesh Malana-II HEP Bara Bangahal HEP Sorang HEP Bara Bangahal HEP Tidong HEP-I Dhaulasidh HEP Kashang HEP Stage-I Dhamwari HEP Karcham Wangtoo HEP Luhri HEP Allain Duhangan HEP Khab HEP Lanco Budhil HEP Miyar HEP Swara Kuddu HEP Uhl HEP-III Rampur HEP Koldam HEP Parbati HEP-Stage III Parbati HEP- Stage-II Chamera HEP-Stage III West Bengal Teesta Low Dam Stage IV Rammam HEP Stage III Teesta Low Dam Stage IV International Projects Teesta Low Dam HEP-III

Slide 23:

2/25/2011 23 Cont… Uttarakhand Koteshwar HEP Devsari HEP Shrinagar HEP Karmoli Lumti Tulli HEP Phata Byung HEP Garba Tawaghat Project HEP Tapoban - Vishnugad HEP Alaknanda HEP Pala Maneri HEP Chungar Chal HEP Kotli Bhel Stage - IA HEP Kotli Bhel Stage - IB HEP Kotli Bhel Stage - II HEP Vyasi HEP Lata Tapovan HEP Rupsiabagar Khasiyabara HEP Naitwar Mori HEP Jakhol Sankri HEP Vishnugad Pipalkoti HEP Singoli Bhatwari HEP

Slide 24:

2/25/2011 24 Karnataka Shivanasamudram HEP Shivanasamudram HEP Maharashtra Humbarli HEP Andhra Pradesh Lower Jurala HEP NagarjunaSagar Tail Pond Dam HEP Pulichintala HEP Kerala Kuttiyadi Additional Extension HEP Pallivasal Extension HEP Thottiyar HEP Madhya Pradesh Maheshwar HEP Meghalaya Myntdu HEP New Umtru HEP Sikkim Teesta-III HEP Teesta VI HEP Gati Chujachen HEP Rangit HEP-IV Jorethang HEP Tamil Nadu Bhawani Kattalai Barrage HEP-II Bhawani Kattalai Barrage HEP-III Cont…

Slide 25:

2/25/2011 25 Fly ash should be considered as an essential ingredient of concrete and not merely for replacement of cement or reduction in cost Concluding Remark

Slide 26:

2/25/2011 26 ThanQ?