Use of Fly ash in Road

Construction

U.K.Guru VittalChief Scientist, CRRI, New Delhi – 110025

e mail: vittal.crri@gmail.com

Mob: 98688 58380

NRRDA Publication & O.M

http://pmgsy.nic.in/public.asp

Thermal Power Plants in U.P

Plant District UtilityCapacity

(MW)

Fly ash

generation

(Million Tonnes/

Year)

Anpara Sonbhadra UPRVUNL 1630 3.2

Harduaganj Aligarh UPRVUNL 670 1.0

Obra Sonbhadra UPRVUNL 1194 1.3

Panki Kanpur UPRVUNL 210 0.3

Parichha Jhansi UPRVUNL 1140 2.0

Rihand Sonbhadra NTPC 3000 4.8

Singaruli Sonbhadra NTPC 2000 3.7

TandaAmbedkar

NagarNTPC 440 1.0

Guru Vittal

Thermal Power Plants in U.P…Contd

Plant District UtilityCapacity

(MW)

Fly ash

generation

(Million Tonnes/

Year)

Dadri G.B.Nagar NTPC 1820 2.6

Unchahar Raebareli NTPC 1050 1.9

Barkhera Pilibhit BEPL (IPP) 90 0.2

Khambar

KheraLakhimpur BEPL (IPP) 90 0.2

Kundarki Gonda BEPL (IPP) 90 0.2

Maqsoodpur Shahjahanpur BEPL (IPP) 90 0.2

Utraula Balrampur BEPL (IPP) 90 0.2

Rosa Phase I Shahjahanpur RPSCL (IPP) 1200 1.3

Guru Vittal

Guru Vittal

Fly ash Usage for

Embankment

Construction

Fly ash Embankment

Case Studies

Fly ash for Road

Pavement Construction

Guru Vittal

315 mm x 150 mm x 150 mm FalG blocks for paving (Fly ash + Lime or cement + Gypsum + Sand or Stone dust)

Bricks are prepared earlier, So faster rate of laying

Environmentally better choice, no burning during

brick making, better strength of bricks (20 MPa)

Khadanza keeps gaining strength after wetting

Khadanza Cost (Wearing course) about Rs.28 lakh

per km (sub-base and subgrade preparation cost extra)

Construction is similar to paver blocks, mortar can

be laid between joints to prevent pilferage

Khadanza (Fly ash Brick Paving)

Fore details: Dr. N Kalidas, INSWAREB, Visakhapatnam (Mob: 9848191453, email: inswareb@gmail.com

KhadanzaRef: https://www.youtube.com/watch?v=A0v9W1CecvQ

Combining Pond ash & Soil Based on Grain Size

Numerical

Difference

between

Material A

and

Average

Material

A “Soil”

Per cent

Passing

Sieve

Size

(mm)

Sub-Base

Gradation

Limits

(MORD

Specs)

Average

Material

B

“Pond

Ash”

Per cent

Passing

Numerical

Difference

between

Material B

and

Average

0 100 37.5 100 100 100 0

10 100 19 80 – 100 90 100 10

32.5 100 9.5 55 – 80 67.5 100 32.5

50 100 4.75 40 – 60 50 100 50

76.5 99 0.425 15 – 30 22.5 69 46.5

73.5 81 0.075 0 – 15 7.5 9 1.5

242.5 140.5Pond ash:Soil = 242.5:140.5 (1.7:1)Pond ash = (242.5 x 100) / (242.5 + 140.5) = 63%

Properties of Stabilised Raichur Pond ash

Mix Proportions (per cent) OMC (%) MDD(kN/m3) CBR (%)

100 % Pond ash 22.5 14.4 22

15% BC Soil + 85% Pond ash 29.6 12.8 40

25% BC Soil + 75% Pond ash 23.0 13.1 34

67% BC Soil + 33% Pond ash 18.0 16.3 4

100% BC Soil 27.0 14.1 2

15% BC Soil + 82% Pond ash +

3% Lime

30.0 12.7 105

33% Gravel + 67% Pond ash 16.2 17.1 45

Guru Vittal

Guru Vittal

Case Studies

Stabilised base course

Mixing & laying of RCCP

Demonstration Road Project Using Fly Ash

Near Dadri (U.P)

Mixing of RCCP

Gur

u V

ittal

तीन प्रकार - फ्ऱाई ऐश, बॉटम एश, और ऩॉण्ड एश IRC SP 72 एवं MORD Specifications में संशोधन ककया है, अब फ्ऱाई ऐश के उऩयोग के लऱए ऩयााप्त ग जंाइश

सूखा फ्ऱाई ऐश (IS 3812 Part 1) प्रततकियाशीऱ है – कंिीट ऩेवमेंट में OPC के बदऱे (upto 30%) इस्तेमाऱ कररए

बॉटम एश और ऩॉण्ड एश – तटबंध (किऱ), GSB एवं Base course में गैर प्ऱास्स्टक सामग्री जसेै उऩयोग

फ्ऱाई ऐश को Stabilise कररए और सड़क तनमााण में इस्तेमाऱ कररए

ऩयाावरण की दृस्टट से स रक्षऺत, ऱागत की बचत एवं सरकारी तनदेशों के अन सार

सारांश

Guru Vittal: vittal.crri@gmail.com

Three types – Fly ash, Bottom ash and Pond ash IRC SP 72 & MORD Specifications have been revised,

Ample scope for fly ash usage in new specifications

Usage – Fill material, Stabilisation, Cement Concrete

Dry fly ash (IS 3812 Part 1) is reactive – Can replace part of cement in concrete pavement

Pond ash and bottom ash – Embankment fill, usage in GSB and Base course as a non plastic material

Stabilise fly ash and build road pavements

Usage is environmentally safe, economical and as per Government Directives

Fly Ash Usage in Road Works

Guru Vittal: vittal.crri@gmail.com

Thank youvittal.crri@gmail.com