Study on Effects of Fly-Ash and Tamarind Kernel Powder in Concrete

Study on Effects of Fly-Ash and Tamarind Kernel Powder in Concrete

1. Venkada Seenivasan.M.E

   Assistant Professor Department of Civil Engineering KGiSL Institute of Technology

   Saravanampatti,Coimbatore

   H.Devaki.M.Tech Assistant Professor

   Department of Civil Engineering KGiSL Institute of Technology Saravanampatti,Coimbatore

   AbstractThe conventional concrete has lost its usage in modern days as it does not serve the present needs. Hence in order to improve the properties of the concrete in the fresh and the hardened state, high performance concrete (HPC) is used. When using tamarind in concrete possess high workability, high strength, high dimensional stability, high durability, low permeability and resistance to chemical attack.This project deals with the effects of supplementary cementations materials in concrete by incorporating fly ash and tarmarind with a water binder ratio of 0.3.Here the conventional concrete is obtained by ordinary Portland cement is replaced with 10%, 20% 30% 40% and 50% of fly ash and also partial replacement of sand by tamarind powder From the experimental results, it is observed that concrete exhibits improved compressive strength, split tensile strength and flexural strength when compared with the conventional mix.

   Keywords High performance concrete, fly ash, Tarmarind.

   Hardened properties

   1. INTRODUCTION

      In this chapter, a brief review of the findings of earlier investigations on the important properties parameters of fly ashes; the available literature on the mechanisms of lime-fly ash and cement-fly ash hydration processes influence of fly ash addition on the properties of concrete, workability and compressive strength , have been presented. A comprehensive review of the work of earlier investigators on blended cements; studies on the activation of low-calcium and high- calcium fly ashes and pozzolonas, have been also presented. An attempt has also been made to critically evaluate the status of activation studies on fly ash. Apart from the above, literature relevant to the work carried out in this study, namely, on mix proportioning methods; effect of elevated temperature; influence of various aggressive environments on blendedfly ash concretes, been briefly reviewed and presented.

   2. MATERIALS

      TABLE 2.1.2 CHEMICAL COMPOSITION OF FLY ASH

      Sl. No.	Chemical component	% of chemical component
      1.	SiO2	42
      2.	Fe2O3	28
      3.	Al2O3	22
      4.	CaO	2
      5.	MgO	1
      6.	K2O	1.30
      7.	Na2O	0.30
      8.	SO3	1

      1. uper plasticizers

         The new generation super plasticizer- 400 was used.

         • Colour – Brown

         • Type – Liquid

         • Specific gravity – 1.175 at 300

      Storage condition – in cool dry place shelf life – 1 year

      The mix proportion were designed as per I.S.10262-2009, 1:1.23:2.19:0.38 (cement: fine aggregate: coarse aggregate: water) by weight of cement was used throughout.

   3. RESULT

      A. Workability

      Workability of the high performance concrete is determined using slump test and the values are tabulated in Table 4.1.1

      Sample	%	m p
      Normal concrete with in PCC	0	55
      Normal concrete with in OPC	0	55
      OPC concrete replacement of sand with Tamarind	100	52
      OPC concrete replacement of cement with in flyash	10	51
      OPC concrete replacement of cement with in flyash	20	50
      OPC concrete replacement of cement with in flyash	30	44
      OPC concrete replacement of cement with in flyash	40	43
      OPC concrete replacement of cement with in flyash	50	40

      TABLE 4.1.1 WORKABILITY TEST RESULTS

      A. Fly Ash

      Flyash is a by-product of the combustion of pulverized coal in thermal power plants. Flyash exhibits pozzolanic activity.

      TABLE 2.1.1 PHYSICAL PROPERTIES OF FLY ASH

      Sl. No.	Particulars	Values
      1	Specific gravity	2.04
      2	Fineness modulus	2.16
      3	Consistency	29%
      4	Initial setting time	110 minutes
      5	Final setting time	235 minutes

      B.Compressive Strength

      Cubes and cylinder are casted and its values are tabulated and plotted.

      7 and 28 Days of cube compressive Strength for M30 Grade

      40

      7 and 28 Days flextural Strength for M30 Grade

      35 34.13 33.54

      32.35

      28

      30

      25

      .17

      25.37

      27.46

      6

      5 4.8

      4.58 4.33 4.31 4.4

      20

      15

      10

      5

      0

      30% TR 10%

      flyash

      20%

      flyash

      30%

      flyash

      40%flyasp0%flyash

      7days

      28 days

      4 4

      4 3.74

      3

      3

      2

      1

      3.61 3.67 3.58

      7 days

      28 days

      Fig 1 Cube compressive strength

      0

      30% TR 10%

      20%

      30%

      40%

      50%

      Flyash Flyash Flyash Flyash Flyash

      7 and 28 Days Cylinder compressive Strength for M30 Grade

      35

      30.44 30.04

      25.9

      30

      18.7

      25

      14.9

      15.8

      13.6

      8

      20

      7

      7

      15

      10

      5

      0

      26.2

      6

      23.42

      13.7

      14.1

      21.72

      4

      5

      7days 28days

      Fig 4 Flexural strength

   4. CONCLUSION

• The dosage of tamarind and fly ash has a significant effect on the compressive strength of concrete under normal curing. The concrete mixture with 10% Fly ash (M1) shows an improved compressive strength than concrete with 20% FA (M2)and the strength goes on decrease with 30%(M3),40%(M4),50%(M5) replacement at 7 days and

28days. The increase in curing period increases the

30%TR 10%

flyash

20%

flyash

30%flyash 40%flyash 50%flyash

strength of M1 concrete specimens and M2 concrete specimens at 7 and 8 days.

Fig 2 Cylinder compressive strength

1. Split tensile Strength

   Cylinder is casted and its split tensile strength are determined and plotted.

   7 and 28 days Split Tensile Strength for M30 Grade

   6

   • The curing of 7 and 28 days compressive strength of (Tamarind+FA) mixture incorporating 30%, 40% and 50% FA was lower than control concrete under normal curing. This is because the pozzolanic reaction is slow and the formation of calcium hydroxide requires time.

   • It is evident from the experimental resuts that the compressive strength decreases when the percentage of fly ash increases.

   • The flexural strength similar to the compressive strength shows better results for 10 % and 20% replacement of fly

   5

   4 3.7

   3

   2 1.5

   1

   0

   4.78

   2.1

   4.11 3.91

   1.58 1.38

   3.52 3.66

   1.3 1.21

   7days 28 days

   ash and 30% replacement of tamarind powder instead of sand but it got reduced with 40% and 50% replacement Further mixes concludes that 10% and 20% replacement of fly ash gives a optimum strength for M30 Grade concrete compared to other replacement.

   REFERENCES

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      30% TR 10% Fly

      ash

      20%

      flyash

      30%

      flyash

      40%

      flyash

      50%

      flyash

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      Vol.12, No.5 563-578

   2. Bouzoubaa and others (2001) Utilization of Copper Slag as a Partial Replacement of Fine Aggregate in Concrete International Journal of

2. Flexural strength

Fig 3 Split tensile strength

Earth Sciences and Engineering Vol. 03, pp. 579-585

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