Concrete has played a vital role in the housing industry over the past few decades, being utilized in a wide range of constructions, from small buildings to large infrastructural dams and reservoirs. A binding agent is a major component of cementitious material. The value of cement is rising daily due to its limited availability and high demand. Simultaneously, global warming is escalating with each passing day. The production of cement also results in the release of greenhouse gases. An investigation has been initiated focusing on cementitious materials, including a trial-based study examining the use of fly ash and GGBS as substitutes for cement. This approach aims to reduce cement consumption and minimize greenhouse gas emissions. An investigation has been initiated focusing on geopolymer cementitious material incorporating nylon crystals. Furthermore, a comparative analysis of this pbc with conventional M20 cementitious material is warranted. Experimental studies were conducted on plain geopolymer cementitious material, and the substitution of cement with Nylon crystal has been completed. In this study, the cementitious materials were prepared by incorporating fly ash, glass, hydroxide, and nylon crystal, with proportions ranging from 100% to 40% by weight of fly ash added to the mixes. A comparative analysis has been conducted between M20 cementitious material and Nylon crystal reinforced geopolymer cementitious material, focusing on their compressive strength, split tensile strength, and bending resistance characteristics. The geopolymer cementitious material developed with Nylon crystal exhibited superior performance in compressive strength, split tension strength, and bending resistance, demonstrating enhanced results at seven, 28, 60, and 90 days compared to conventional cementitious materials. Furthermore, two distinct types of acid attacks are conducted to evaluate the bond strength and compressive strength of both standard cementitious materials and nylon crystal reinforced geopolymer cementitious materials.