Alumino-silicate(geo)polymer (ASP) has created a better alternative to conventional concrete and is being under continuous study owing to the environmental benefits. However, the ASP mortar possesses certain constraints of poor workability, whereas the workability and mechanical properties are inversely proportional to each other. On the other hand, a large amount of cellulose pulp filtrate (liquor waste) is generated from the pulp industries, which pollutes/exploits the land. To overcome the above issues, the present study aimed to utilize the cellulose pulp filtrate waste in the formulation of ASP mortar to study its influences in terms of workability and mechanical properties.