Comparison of Coren mix design with other international mix (ACI and DoE) design methods

Because of its quality, which allows for veracities, Today, concrete is the most frequently utilized civil engineering material. Concrete has a low tensile strength and a high compressive strength. Even though Nigeria is Africa's giant, it has been discovered that its local contractor does not have a well-used standard mix procedure. Local Nigerian contractors have relied on an international mix. COREN recently established a mix design. It is critical that we determine whether this design process will be suitable for usage by local contractors. To assess the effectiveness of the published local mix against defined international standards, a complete experimental analysis of the COREN mix design with ACI and DoE was used in this study. With a target compressive strength of 30N/mm2, three concrete mix designs with 0.48 and 0.50 water/cement ratios were used, and this mix was subjected to compressive tests, split tensile tests, and three-point bending. With respect to all the test conducted and analyzed, this attests to the level of significance of COREN i.e. For 28days mix with 0.48w/c, compressive strength with COREN gave 32N/mm2 against 31N/mm2 and 30N/mm2 for ACI and DoE mix, respectively. Splitting tensile strength of 2.7 N/mm2 was achieved with COREN mix against 2.8N/mm2 and 2.7N/mm2 from ACI and DoE, respectively. Likewise, results of flexural strength are 4.7N/mm2, 5.3N/mm2 and 5.1N/mm2 for COREN, ACI and DoE, respectively. For 28days mix with 0.50w/c, compressive strength with COREN gave 29N/mm2 against 30N/mm2 for ACI and DoE mix, respectively. Splitting tensile strength of 2.5N/mm2 was achieved with COREN mix against 2.4N/mm2 and 2.8N/mm2 from ACI and DoE, respectively. Likewise, results of flexural strength are 5.1N/mm2, 4.7N/mm2 and 5.6N/mm2 for COREN, ACI and DoE, respectively.