COMPARISON ON THE STATIC MODULUS OF ELASTICITY OF M50 GRADE CONCRETE USING METAKAOLIN AND POLYPROPYLENE FIBERS

Abstract

The substance that is used the most worldwide is concrete after water and has a good compressive strength
and durability. Cement is the main ingredient of concrete. Depending upon the nature of work, the water,
coarse, fine aggregates and cement are mixed in specific proportions to produce plain concrete. In an effort
to lower the price per unit of concrete and the energy needed to produce it, the use of SCM, waste
materials, industrial by-products, and inventive materials is becoming necessary.
The use of additional cementations elements is now essential to improving the characteristics of concrete..
These may be occurring naturally, industrial wastes, or by products or the ones requiring less energy to
manufacture. Metakaolin is obtained by calcination of Kaolinite. It is being used very commonly
as Pozzolanic material in mortar and concrete, and has exhibited considerable influence in enhancing the
mechanical properties and durability properties of mortar and concrete. Metakaolin has shown the
following benefits: increase in compressive strength, tensile strength, flexural strength, and decrease
porosity and permeability and is abundantly available. Polypropylene fiber is a kind of polymer material
with light weight, high strength, and corrosion resistance. Polypropylene is often added to the cement
matrix to improve the resistance of concrete. The crack resistance of concrete can be improved by adding
PPFs.
In this investigation, Metakaolin is used in replaced by cement with 0%, 5%, 10%, 15% and 20% and the
optimum percentage is obtained for 28 days compressive strength. After finding the optimum percentage
,the mix is later varied by adding Polypropylene fibers in different proportions such as 0%, 0.5%, 1% and
1.5% to find the mechanical properties of concrete such as Flexural strength, Compressive strength and
Modulus of elasticity for the curing period of 28 & 56 days. Also the study focuses on Analysis and
comparison of the results obtained by the experimental tests using bar charts and graphs and studies the
variation in strength when compared to conventional concrete.