• Chirag Bhadani
• Hardik Solanki

Researchers tried almost every conceivable material to be mixed in concrete to alter some of its properties. To this end, the study proposes a model to predict changes in the amount of water runoff through cracks over time when spherical SAPs in superabsorbent material exhibit rapid swelling by absorbing the first water ingress after the occurrence of cracks. In this research superabsorbent polymer (SAP) is were used as an admixture to improve its water tightness properties especially in concrete tanks, aeration basins and retaining structures. The concrete tries to seal the leak by blocking the water path by semi-solid gels. This gel is the product of the interaction of the superabsorbent polymer with water. Several samples were prepared to study the effect of the superabsorbent polymer on the concrete mechanical properties, durability and on the concrete capability to block the water flow. Concrete cubes, concrete beams and concrete cylindrical samples were prepared to study the concrete strength of concrete mixed with superabsorbent polymer. Also concrete special type of short cylindrical samples were prepared to study the concrete ability to block the water flow. These cylindrical samples were intentionally broken into two approximately equal pieces to create an induced artificial crack. The artificially cracked samples were subjected to falling head water pressure to study the concrete ability to stop the water flow though the induced concrete crack. In this research work percentage of sodium polyacrylate are taken as 0.1, 0.2 1% and 2% by weight of cement. At end of the study result showed that the SAP also provides additional voids in the concrete mass so these voids affect the compressive strength of the concrete strength negatively. Transverse test of concrete beam and splitting tensile strength of cylinder showed that it is decrease with respect to increase the SAP % in concrete mix. The plain concrete sample has a very large water flow value and almost constant. The flow rate decreases with time. This applies for all of the SAP samples, but the one with high percentage showed faster decrease in water flow rate with time.

Concrete, Self-sealing, Cracks, Superabsorbent Polymer, Sodium Polyacrylate, Mechanical Property

"SELF-SEALING OF CRACKS IN CONCRETE USING SUPERABSORBENT POLYMER", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.214-219, April-2019, Available :http://www.jetir.org/papers/JETIR1904C34.pdf

"SELF-SEALING OF CRACKS IN CONCRETE USING SUPERABSORBENT POLYMER", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp214-219, April-2019, Available at : http://www.jetir.org/papers/JETIR1904C34.pdf