Behaviour of Cement Concrete using Rice Husk As A Replacement of Fine Aggregate

Behaviour of Cement Concrete using Rice Husk As A Replacement of Fine Aggregate

Saritha Saju 1

Student

Department of Civil Engineering Mangalam College of Engineering Ettumanoor, India

Govind S lal 2

Student

Department of Civil Engineering Mangalam College of Engineering Ettumanoor, India

Aswathy Soman 5

Assistant Professor

Muhammed Ijas Ismail 3

Student

Department of Civil Engineering Mangalam College of Engineering Ettumanoor, India

Rohith Raj 4

Student

Department of Civil Engineering Mangalam College of Engineering Ettumanoor, India

Department of Civil Engineering Mangalam College of Engineering Ettumanoor,India

Abstract Concrete is one of the widely used construction material nowadays. The concrete is a mix of fine aggregate course aggregate and cement. For increasing strength of concrete as well as reduce the cost of concrete the replacement of fine aggregate is done with chopped rice husk and plastic fiber. Then the concrete is tested with compression test and checked whether the desired strength is achieved or not. By using rice husk and plastic fiber which cheap and readily available and gives strength to concrete .By this we can use this kind of concrete for the building to reduce the cost of concreting

Keywords: Concrete, Fine aggregate, Rice husk

1. INTRODUCTION

   Concrete is one of the basic component in the field of construction. The concrete have very high strength which makes the building strong. The concrete contains the fine aggregate, course aggregate, cement and admixtures. Nowadays the material cost for concreting is increased due to many factors.Somany people are suffering due to the increase in the cost of concreting. So for reducing cost new innovative ideas are used and that is by using the chopped rice husk and plastic fibre as replacement material for the fine aggregate. The rice husk is mostly available from the paddy field in bulk amount and available in cheap price So by using this materials and replacing the fine aggregate with these materials by following suitable Indian Standard codes. So by using these components we can reduce the cost of concrete and economical constructions can be practised through out.

2. LITERATURE REVIEW

   The studies bring about the salient points of published literatures and other reported works.

   Mochmad solikin, Naufal ikhsan: study characteristics of brick made by partial substitution of fine aggregate with Styrofoam. partial substitution of fine aggregate with styrofoam in proportion of 0%, 30%, 40%&50%. meets slump properties with appropriate superplasticizers.Increase water absorption, decrease compressive strength & structural strength but reduce dead weight

   VARUN YADHAV,NITHIN RAJPUT: To find the

   strength absorbance of brick constructed using plastic rice straw and fly ash. The purpose is ton identify the change of characteristic of brick when the waste and fine aggregate are replaced with other material. Adding more waste plastic& chopped rice straw would result in high compressive strength ,high water absorption

   RAVI KIRAN,RAJKAMAL D H,RAHUL M: To replace

   plasticWith some other fine aggregates, to provide lo cost cement brick in market ,to increase life of brick.

   Minerals:Cement sand water gravel.PET plastic

   Concrete mix:Portland cement,msand gravel,water,PET platic By using plastic we can reduce plastic waste

   Reduce clay in brick Less water absorbtion

3. OBJECTIVES OF WORK

   • To reduce the cost of concrete for economic construction.

   • To increase the strength of concrete.

   • To reuse the waste rice husk to reduce the pollution

4. METHODLOGY

   The rice husk being collected from the paddy field And other components like fine aggregate ,course aggregate, cement and admixtures. The design mix of m25 grade is been prepared in the proportion of 1:1.67:2.76 using IS- 10262-2019.Then the percentage of rice husk is been prepared as follows 0%,0.5%,1%,1.5%,2%,2.5%(IJET- 2021).The concrete cube is prepared with mould in different proportion and kept it for curing for 7 days and 28 days.And after the curing period the concrete cube being tested using compression test mechine.

5. MATERIALS USED The materials used are:

   • Fine aggregates

   • Course aggregate

   • Cement

   • Rheoplast

   Fig1: Chopped rice husk

6. MIX DESIGN Target strength(m25)

Fck=fck+1.65S

=25+(1.65×4)

=31.6N/mm^2

Selection of water cement ratio For 31.6N/mm^2 W/c=0.45

For 20mm size aggregate water content =186L

Cement content=186÷0.45=413kg/m,^3

Proportion of volume of Course aggregate and fine aggregate

For w/c 0.5,volume of CA=0.62 But in the present case it is 0.45 To lower the w/c by 0.45,by0.005

The volume of CA is increased by o.o1 Therefore the volume of CA=0.62+0.01=0.63

Volume of FA=1-0.63=0.37 Total volume=1m^3

Volume of entrapped air in wet concrete =0.01m^3

Volume of cement =( mass of cement÷sp cement)×(1÷1000)

=(413.33÷3.13)×(1÷1000)

=0.1248m^3=0.125m^3

\Volume of water=(186÷l)×(1÷1000)

=0.186m^3

Volume of all in aggregate

=(a-b)-(c+d)

=(1-0.01)-(0.125+0.186)

=0.99-0.311

=0.679m^3

Mass of CA=0.679×0.63×2.67×1000

=1142.14kg

Mass of FA=0.679×0.37×2.75×1000

=690.8kg

For 1 cube

Volume =0.15×0.15×0.15=0.0034m^3

Volume of 4 cubes=0.0135m^3 10%extra=0.0135×1.1=0.0149m^3 FA=10.412kg

0.5%FA=0.0521 of rice husk Therefore FA=10.359kg

1m^3 Cement =413.3kg Water =186L CA=1142.14kg FA=698.3kg

w/c=0.45

VII TESTS TO BE CONDUCTED

The test conducted for the concrete cube is the compression test . This test is carried out by compression testing machine

The test is done after 7th day and 28th day and the result is being checked to check wheather the target strength achieved or not.

Fig 2: compression test mechine

VIII. OBSERVATIONS&RESULT

Following are the observations obtained while testing the samples,

Percentage of husk	Strength in N/mm^2
0%	6
0.5%	6.66
1%	8.88
1.5%	12.88
2%	15.55
2.5%	10.23

Table 1 strength of concrete in 7 days

The optimum value of rice husk can be taken as 2% with strength of 15.55

Strength

0%

0.50%

1%

1.5

2%

2.50%

strength

20

15

10

5

0

strength

Fig 4 graph showing the strength of concrete CONCLUSION

By the addition of the rice husk in the concrete as mentioned above using suitable ,mix and mix design we got the optimum value of the rice husk as 2% and by taking this value for the preparation of concrete which will make the concrete economical, strengthened and waste saving

REFERENCE

[1] Dar,A.R., Verma,S.K., Ashish,D.K. and Dar,M.A. "INVESTIGATION ON THE PROPERTIES OF THE

NONCONVENTIONAL BRICKS", Journal of structural engineering, February 2015, vol. 3, pp. 26-35. 2. Karthik,S. , Kumar,A. , Gowtham. , Gokul,E. and Thangaraj "SOIL STABILIZATION BY USING FLY

ASH", Journal of Mechanical and Civil Engineering , January 2014,vol. 10, pp 20-26 3. Kadir,A.A. and Mohajerani,A. "BRICKS: AN EXCELLENT BUILDING MATERIAL FOR RECYCLING WASTE-REVIEW",

International conference environmental management and engineering, 2011, pp. 108-115. 4. Rajarapu Bhushaiah, Shaik Mohammad, D. Srinivasa Rao. Study of Plastic Bricks Made From Waste Plastic, International Research Journal of Engineering and Technology (IRJET), Volume: 06 Issue: 04 Apr 2019. 5. Tayfun Çiçek, Yasin Çinçin. Use of fly ash in production of light-weight building bricks, 2015 Elsevier Ltd., 16 July 2015.

[2] . S.Sakthi Sasmitha , Dr.R.N.Uma. A Critical Review on the Application of Bakelite as a Partial Replacement of Fine and Coarse Aggregate, IJSART – Volume 4 Issue 11 NOVEMBER 2018 7. Mostafa E. Allam, Gihan L. Garas, Hala G. El Kady. Recycled Chopped Rice StrawCement Bricks: Mechanical, Fire Resistance & Economical Assessment, Australian Journal of Basic and Applied Sciences, C(): CC-CC, 2011 ISSN 1991-8178 © 2011 8. Hanifi Binici, Orhan Aksogan , Mehmet Nuri Bodur , Erhan Akca , Selim Kapur. Thermal isolation and mechanical properties of fibre reinforced mud bricks as wall materials, 21 November 2005.

Fig 3 pie diagram showing strength