The Effect of Utilizing Rice Husk Ash on Some Properties of Concrete - A Review

Deepinder Singh Aulakh,Sarvesh Kumar,Jaspal Singh

doi:10.12944/cwe.13.2.07

Abstract

World environmental pollution is having direct and visible influence of construction industry. Relatively, 10 quintal of CO2emitted by the manufacturing of 10 quintal of ordinary portland cement (OPC), which accounts almost seven percent of the global CO2 emissions. Averagely, ten thousand million cubic meter of concrete is produced yearly. Byproducts like rice husk ash (RHA), fly ash, blast-furnace slag, metakaolin and silica fume will be able to utilize as supplementary cementitious material because of their pozzolanic behavior. Rice husk cannot be used as animal’s feed due to the low nutritional value. Neither can it be discarded as landfill nor by burning because it arise a great environment challenge. By converting rice husk into rice husk ash (RHA), it can be used in concrete as a fractional substitution of cement because of high silica quantity in RHA. In this present paper, the result of some authors with the use RHA as a fractional substitution of cement on the properties of concrete like workability, permeability, compressive and tensile strength are reviewed.

Highlights

The major environmental issues emerge these days are change in the climate, drain of the resources and so on
It was found from the study that the mechanical strength of the mortar increases with 10% by weight rice husk ash (RHA) replacement with cement[25,26]
Another study was conducted by Saraswathy and Song with 15%, 20%, 25% and 30% RHA replacement in concrete on cylindrical samples and observed that split tensile strength of various percentages RHA concrete were 4.92, 4.60, 4.58 and 3.67 N/mm[2] respectively which is much greater than the normal concrete, but suffered a great fall with 30% RHA substitution[53]

Summary

Introduction

The major environmental issues emerge these days are change in the climate, drain of the resources and so on. In the present review paper, the results and discussion of some researchers on using rice husk ash (RHA) as additional cementitious material on the properties of concrete like compressive strength, workability, permeability and tensile strength are reviewed. Another study was conducted by Saraswathy and Song with 15%, 20%, 25% and 30% RHA replacement in concrete on cylindrical samples and observed that split tensile strength of various percentages RHA concrete were 4.92, 4.60, 4.58 and 3.67 N/mm[2] respectively which is much greater than the normal concrete, but suffered a great fall with 30% RHA substitution[53]. Ganesan et al, concluded from his trial that upto 30% RHA replacement the total charge passing through concrete containing RHA consistently decreases[48] Another researcher Ramasamy studied that with the use of RHA in concrete, chloride ion diffusion increases but yet remain in the ‘‘very low category”. RHA mixed with cement/lime can be used as a stabilizing agent for soil as it improve the index properties and particle size distribution of soil[59,60]

Conclusion

Findings

Mechanical properties and durability