| dc.description.abstract | Concrete is a mixture of cement, sand, natural aggregate and recycled concrete in some
specified proportion which is generally used for R.C.C and C.C. We have worked on a
comparative study about on compressive strength test natural and recycled concrete. Firstly,
mixing (mix proportion 1:2:4) 100% recycle concrete, 100% natural aggregate, 50% natural
aggregate and recycle, 25% natural aggregate 75% recycle and 75% natural aggregate 25%
recycle concrete mixing 60th concrete cylinders of 4 x 8 inch were made. Total cylinder cured
with laboratory water tank and sign every molding top mix proportion and date. In this study
two different type coarse aggregate used to observe the difference affected concrete with
various curing method.
As the global construction industry seeks sustainable alternatives to mitigate the depletion
of natural resources and manage demolition waste, Recycled Aggregate Concrete (RAC) has
emerged as a viable solution. This research presents a comparative laboratory investigation
into the compressive strength properties of conventional Natural Aggregate Concrete (NAC)
and Recycled Aggregate Concrete (RAC) on evaluation.
The experimental program involved replacing natural coarse aggregates with recycled
concrete aggregates (RCA) at varying percentages: 25%, 50%, 75%, and 100%. Concrete
cylinders of 4 x 8 inch cast for each mix ratio (1:2:4) and tested for axial compressive strength
at curing ages of 7, 14, 21 and 28 days.
The research concludes that while Natural Aggregate Concrete remains superior in high-load
structural applications, Recycled Aggregate Concrete at partial replacement levels is an
environmentally and technically feasible alternative for non-structural elements, pavements,
and low-rise residential structures. Recommendations are provided for the use of mineral
admixtures and adjusted water-cement ratios to optimize the performance of RAC in
structural applications. | en_US |
