EFFECT OF NANO-SILICA AND METAKAOLIN ON PROPERTIES OF RECYCLED COARSE AGGREGATE CONCRETE
Keywords:
Recycled Coarse Aggregate, Nano-Silica, Cement Replacement, Controlled Concrete, Compressive Strength, Flexural Strength, Split Tensile Strength and Elastic Modulus.Abstract
The aim of the experimental investigation is to find the influence of Nano-Silica (NS) and Metakaolin (MK) on
strength properties of Recycled Coarse Aggregate concrete.In the present investigation, Recycle Coarse Aggregate (RA) was
used as 25%, 50%, 75% and 100% replacement of Natural Coarse Aggregate. Cement is replaced by the combined
application of Metakaolin and Nano-Silica by weight. Cement is replaced by 10%, 15% and 20% of Metakaolin and 1%, 2%
and 3% of Nano-Silica. The influence of combined application of Recycled Coarse Aggregate, Metakaolin and Nano-Silica
on compressive strength, split tensile strength, flexural strength and modulus of elasticity of M25 grade of concrete is
investigated. Tests were conducted on standard concrete specimens prepared using the different combinations of Recycled
Coarse Aggregate, Metakaolin and Nano-Silica then the test results are compared with that of controlled concrete. Based on
the test results, it can be observed that concrete prepared with 50% Recycled Coarse Aggregate, 15% Metakaolin and 2%
Nano-Silica combination possesses improved strength properties compared to the controlled concrete
