Responsible disposal and recycling of textile waste has become one of the most pressing subjects, which is continuing to increase with the growing population and correspondingly expanding demand for clothing. The utilization of cellulosic fibrous waste, which is currently dominating the textile market in terms of production and consumption, is one of the most significant issues to be addressed. Recycling cellulosic fibres as reinforcement materials in mortars is a technique that has long been used and studied. This study aims to sequentially prepare reinforced mortar specimens incorporating different forms of spinning waste, for example, fresh cotton fibres, spinning fly, comber noil, viscose waste, and tencel fly, by initially treating them with 2, 4, 6, 8, and 10% caustic soda. A set of experiments was then sequentially performed to assess the mechanical performance of the resulting mortar samples. It was finally concluded that viscose fibers exhibited superior properties as compared to the rest of the samples. Overall, findings from the study suggest that waste cellulose fibers have a good prospect of being utilized in the reinforcement of cement mortars