EXPERIMENTAL STUDY ON STRENGTH AND DURABILITY PARAMETERS OF CONCRETE BY PARTIAL REPLACEMENT OF CEMENT WITH SODIUM POLYACRYLATE

The ordinary Portland cement is one of the best binders in the construction industry, it causes a lot of damage to the environment while production and hydration process to attain strength. There is a need of protecting the environment at least by decreasing the utilization OPC. The sodium polyacrylate (SPA) is also called as a super absorbent polymer , capable of increases its volume to 400-500 times by addition of water. In this paper, cement is replaced with SPA, the properties of cement mortar as well as concrete had investigated at fresh & hardened state. The use of SPA in M20 grade concrete at varies percentages in 0.1 to 0.9 in the interval of 0.3. The setting time in cement mortars as well as concretes increases by increasing percentage SPA. The volume increases proportionally by increasing the SPA percentage in cement mortars as well as concretes. The concrete showed better strength in blended mixes with SPA by ambient curing than curing with water. Strength and unit weight of blended mixes decreasing by increasing the SPA percentage by comparing nominal mix. SPA mixes show good results against NaCl and MgSO4 , very poor results against H2SO4.