Abstract

The results of the best mix design are discussed, along with the mechanical and durability properties of the coconut shell + fly ash + coir fibre reinforced concrete (CSFCC) and coconut shell + fly ash + steel fibre reinforced concrete (CSFCS) mixes. The best performing mixture out of a total of 17 experimental mixes was chosen for mechanical examination. Two different mixes are made, one with coarse aggregate made of coconut shell (CSFCC) and the other with coarse aggregate made of conventional material (CSFCS). Class F fly ash is used to replace 0, 10, 20, and 30% of the cement, respectively, in weight terms.  The durability of CS concrete was evaluated using a variety of tests, including water absorption, the Volume of Permeable Pore Voids (VPV), Sorptivity, the Rapid Chloride Penetrations Test (RCPT), and the CSAC resistance capabilities at high temperatures.