USING SUPER ABSORBENT POLYMERS TO DEVELOP SELF SEALING CONCRETE (KEY IJP************731)

• Zohib Akram,Er. Rekha Devi

Abstract

The utilisation of superabsorbent polymers (SAPs) in the creation of self-sealing concrete is a notable breakthrough in the field of construction materials engineering. This innovation has the potential to address concerns regarding the long-term durability and upkeep of concrete structures. Self-sealing concrete, enhanced by superabsorbent polymers (SAPs), has the capability to automatically close small cracks that emerge over time as a result of factors like shrinkage, changes in temperature, and mechanical stress. This improves the durability and effectiveness of concrete buildings. Superabsorbent polymers, known for their remarkable ability to absorb and swell with water, are included into the concrete mixture to act as internal reservoirs that can absorb and hold water. Microcracks in concrete allow water to penetrate by capillary action, causing the expansion of SAP particles. As the superabsorbent polymers (SAPs) increase in size, they apply force on the nearby concrete structure, effectively sealing the cracks and blocking the entry of damaging substances including water, chlorides, and corrosive chemicals.The usage of selfhealing agents in self-sealing concrete has numerous benefits. Firstly, it fosters sustainability by decreasing the necessity for frequent maintenance and repair tasks, hence minimising the use of materials, expenditure of energy, and related costs. In addition, the use of self-sealing concrete improves the longevity of structures by increasing their resilience and lowering the likelihood of damage caused by environmental conditions and ageing. Furthermore, the self-sealing system enables the maintenance of the structural integrity, guaranteeing adherence to safety standards and legal mandates. The process of creating self-sealing concrete using SAPs requires careful consideration of several issues, such as choosing appropriate types of SAPs, optimising the dose, ensuring compatibility with concrete components, and evaluating long-term performance. Scientists and engineers are now investigating new methods to improve the efficiency and usefulness of self-sealing concrete technology. This includes finding better ways to disperse superabsorbent polymers (SAP), adjusting the size distribution of particles, and incorporating them into certain concrete mixtures. Moreover, the utilisation of self-sealing concrete goes beyond conventional construction methods, spanning several industries including infrastructure, transportation, maritime, and underground construction. Self-sealing concrete is a very versatile and adaptable material that shows great promise in tackling sustainability, robustness, and lifecycle management concerns in civil engineering applications.