Behavior of M25 Grade Concrete with Partial Replacement of Fly ash and Rice Husk ash

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BEHAVIOUR OF M25 GRADE CONCRETE BY PARTIAL
REPLACEMENT OF CEMENT WITH FLY ASH AND RICE HUSK
ASH

• SUBMITTED BY
• T.L.Sravanthi

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INTRODUCTION
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Available raw materials

• Fly ash
• Polymers
• Silica fume
• Rice husk ash
• Sugar cane bagasse
• Ground Granulated Blast Furnace Slag

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Cement

• CFR2703
• CFR2406
• CFR2109

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Cement
Fly ash
Water
Rice husk ash
Chemical admixture
River sand
Coarse aggregate
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Main Objective

• To obtain the mix proportions of M25 grade
  concrete.
• To study the effect partial replacement of cement
  by using FA and RHA with different ratios
• To study the effect of SP (CONPLAST430) at three
  different stages
• To compare the compressive strength and Flexular
  strength.

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Physical properties of Cement
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FLY ASH

• It is one of the residues generated in the
  combustion of coal.
• It is a by-product of the thermal power plant
  generation industries

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Rice husk Ash
- Non
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Rice husk Ash
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Coarse Aggregate

• Fineness Modulus7.257

• Physical properties of coarse aggregate

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Fine Aggregate
Physical properties

• Fineness modulus 2.015
• Sand belongs to ZONE-III

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Mix DESIGN for M25- Grade concrete as per
IS10262-2009

• Cement 375kg/m3
• Water 180kg/m3
• Coarse aggregate 1204.466kg/m3
• Fine aggregate 616.503kg/m3
• Chemical admixture 3.75kg/m3
• Water-cement ratio 0.48
• The mix ratio obtained is 11.643.21

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Tests

• Workability test
• Slump test
• Compressive strength test
• Flexural strength test

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Slump test
To maintain this (180mm)slump the water is
reduced and water-cement ratio alters. The actual
water cement ratio is 0.48. The water-cement
ratio acquired for normal M25 grade concrete at
1 SP, 1.3 SP, and 1.6 SP is same maintained
for other three ratios i.e., CFR2703, CFR2406 and
CFR2109.

• The water content reduced up to 5 for 1SP
  acquired water-cement ratio is 0.455.
• The water content reduced up to 5 for 1.3SP
  acquired water-cement ratio is 0.445
• The water content reduced up to 20 for 1.6SP
  acquired water-cement ratio is 0.384.

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Compressive strength
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Flexural strength
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Results
Compressive strength of M25 Grade concrete (OPC
SAND)
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Compressive strength of the M25 Grade
concrete (OPC FA (27) RHA (3) )
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(No Transcript)
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Compressive strength of M25 Grade concrete (OPC
FA (24) RHA (6))
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(No Transcript)
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Compressive strength of the M25 Grade concrete
(OPC FA (21) RHA (9) )
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(No Transcript)
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• By comparing the results of N, CFR2703, CFR2406
  and CFR2109 at the age of 7 days from the above
  graph it is observed as follows
• For 1 SP the strength varies as N
  gtCFR2109gtCFR2406gtCFR2703
• For 1.3 SP the strength varies as N
  gtCFR2109gtCFR2406gtCFR2703
• For 1.6 SP the strength varies as N
  gtCFR2406gtCFR2109gtCFR2703

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• By comparing the results of N, CFR2703, CFR2406
  and CFR2109 at the age of 28 days from the above
  graph is observed as follows
• For 1 SP the strength varies as N
  gtCFR2109gtCFR2406gtCFR2703
• For 1.3 SP the strength varies as N
  gtCFR2406gtCFR2109gtCFR2703
• For 1.6 SP the strength varies as N
  gtCFR2109gtCFR2406gtCFR2703

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Flexular strength of M25 Grade concrete (OPC
SAND)
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FLEXURAL STRENGTH OF M25 Grade concrete (OPC
FA (27) RHA (6) )
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Flexural strength of M25 Grade concrete (OPC
FA (24) RHA (6) )
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Flexural strength of M25 Grade concrete (OPC FA
(21) RHA (9))
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• By comparing the results of N, CFR2703, CFR2406
  and CFR2109 at the age of 7 days from the above
  graph it is observed as follows
• For 1 SP the strength varies as N gt CFR2406 gt
  CFR2109 gt CFR2703
• For 1.3 SP the strength varies as N gt CFR2109 gt
  CFR2406 gt CFR2703
• For 1.6 SP the strength varies as N
  gtCFR2406FR2406gt CFR2703gt CFR2109

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• By comparing the results of N, CFR2703, CFR2406
  and CFR2109at the age of 28 days from the above
  graph it is observed as follows
• For 1 SP the strength varies as CFR2703 gt N gt
  CFR2406 gt CFR2109
• For 1.3 SP the strength varies as N gt CFR2703 gt
  CFR2109 gt CFR2406
• For 1.6 SP the strength varies as N gt CFR2109 gt
  CFR2406 gt CFR2703

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CONCLUSION

• Compressive strength is more for CFR2109
• Flexural strength is more for CFR2703

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References

• Dao Van Dong, Pham DuyHuu, Nguyen Ngoc Lan,
  Effect of rice husk ash on properties of high
  strength concrete, The 3rd ACF International
  Conference- ACF/VCA 2008
• Deotale R S, Sathawane S H, Narde A R,Effect of
  Partial Replacement of Cement by Fly Ash, Rice
  Husk Ash with Using Steel Fiber in Concrete,
  International Journal of Scientific Engineering
  Research, Volume 3, Issue 6, June-2012

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Thank you..!