AbstractAs reported in literature, the Reactive Powder Concrete (RPC) with quartz powder substitute has a high compressive strength of 180MPa and has a fairly high tensile strength. That research used the RPC with quartz powder to cement ratio of 30% and steam curing technique in an autoclave temperature of 250°C. Concerning the use of local and recycled material, in this study, the quartz powder is substituted by glass powder from the waste glass shards material of housing industry. The objective of this study is to investigate the influence of glass powder in the mechanical behavior of RPC. The mechanical behavior is examined by the tests of compressive strength, flexural strength and split tensile strength. The RPC uses glass powder that grained to micron meter size with the content as much as 10%, 20%, and 30% of cement mass, and the maximum temperature of steam curing is 95°C. The results indicated that the use of glass powder in this study was good enough to replace quartz powder in RPC. The maximum compressive strength value that can be achieved in this study is 136MPa for the RPC with the glass powder content of 20%.