Characterization and impact of curing duration on the compressive strength of coconut shell coarse aggregate in concrete

Partial replacement with coconut shell coarse aggregates was studied as a means to produce lightweight concrete (CSC). Coconut is structural grade that has lower self-load compared the normal weight (NWC), which allowed production of larger precast units. An experimental study and analysis were conducted using different volume percentages 0%, 10%, 30%, 50%, 70% aggregates, M30 (30 MPa) concrete. The compressive strength NWC CSC obtained on 7th 28th day. optimum results for at day 34.2 38.6 MPa, respectively. In addition, workability weight-reduction analyzed NWC. Scanning electron microscopy (SEM) energy dispersive X-ray spectroscopy (EDS/EDX) Fourier transform infrared (FTIR) also used investigate morphology, chemical composition, functional groups