PAPER PRESENTATIONON

APPLICATION OF RICE HUSK IN CEMENT CONCRETE

ByY. SWATI LAKSHMI

B. NEELIMA

Date: 23.01.2012

DEPARTMENT OF CIVIL ENGINEERINGKAVIKULGURU INSTITUTE OF TECHNOLOGY & SCIENCE

RAMTEK-441106

http://upload.wikimedia.org/wikipedia/commons/6/68/Rice_husk.jpg

CONTENTS 1. INTRODUCTION 2. CONCEPT OF PARTIAL REPLACEMENT 3. USES OF RICE HUSK ASH 4. FRESH PROPERTIES OF MORTAR 5. PROPERTIES OF HARDERNED MORTAR 6. DURABILITY PROPERTIES 7. CONCLUSIONS

INTRODUCTION

CONCEPT OF PARTIALREPLACEMENT

USES OF RICE HUSK ASH

FRESH PROPERTIESOF MORTAR

WORKABILITY SETTING TIME

WORKABILITY

SLUMP TEST

SR.NO PARTICULARS

W/C RATIO SLUMP(MM)

1 0% RHA 0.50.6

08

2 10% RHA 0.50.6

014

3 15% RHA 0.50.6

217

4 20% RHA 0.50.6

79

Slump test results

SETTING TIME

STANDARD CONSISTENCY TEST

Vicat apparatus

RHAPROPORTION

0%RHA 5%RHA 10%RHA 15%RHA 20%RHA

INITIAL SETTING TIME(MIN)

58 65 76 92 103

FINAL SETTING TIME(MIN)

196 215 318 - -

RESULTS

PROPERTIES OF HARDENED MORTAR

PORE SIZE DISTRIBUTION WATER ABSORPTION COMPRESSIVE STRENGTH

PORE SIZE DISTRIBUTION

WATER ABSORPTION

LESS PERMIABILITY

COMPRESSIVE STRENGTH

COMPRESSION TESTINGMACHINE

SR.NO

AVG. COMPRESSIVE STRENGTH

7 DAYSN/MM**2

14 DAYSN/MM**2

21 DAYSN/MM**2

1 0% RHA 11.41 13.19 14.65

2 5% RHA 10.97 12.74 14.52

3 10% RHA 10.67 12.20 14.40

4 15% RHA 10.37 11.99 13.63

5 20% RHA 9.95 11.70 13.33

RESULTS

DURABILITY PROPERTIES

1. ALKALI SILICA REACTION 2. CHLORIDE ION DIFFUSION 3. SULPHATE RESISTANCE 4. CORROSION RESISTANCE AND DRYING SHRINKAGE

CONCLUSION

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