Author(s)
Ning Wang, Yinger Deng, Shuai Liu, Lin Chen
Abstract
Underwater repair mortar plays a critical role in restoring submerged concrete structures, offering advanced solutions for challenging repair environments. As infrastructure ages and marine structures face aggressive conditions, the demand for specialised underwater concrete repair techniques continues to grow. These advanced repair mortars are engineered to deliver exceptional bonding strength, durability, and resistance to washout during placement beneath water.
One of the key benefits of underwater repair mortar is its ability to set and cure effectively under water, minimising the need for dewatering, which is often costly and time-consuming. The development of such materials incorporates unique chemical compositions that resist dilution, ensuring the integrity of the repair remains intact throughout the curing process.
Innovations in underwater concrete repair technology have also focused on shrinkage control, early strength gain, and compatibility with existing concrete. These features are especially vital for repairing elements such as piers, sea walls, tunnels, bridge foundations, and reservoirs. In addition, underwater repair mortars are typically non-toxic and environmentally safe, making them suitable for applications in sensitive marine ecosystems.
Selection of the right underwater repair system depends on the nature of the damage, environmental conditions, and long-term performance requirements. Most modern formulations are pre-packaged and easy to mix, allowing divers or skilled operators to apply them quickly with minimal training. Some variants also include anti-corrosive properties that protect embedded reinforcement from saltwater exposure.
Advanced performance evaluation methods, such as response surface analysis, are used to optimise the mix design and performance characteristics of underwater repair mortars. These scientific approaches allow for fine-tuning the formulation to maximise adhesion, flexural strength, and workability.
With proper application, underwater repair mortars contribute significantly to extending the service life of critical structures, improving safety, and reducing maintenance costs. As infrastructure demands evolve, investing in high-quality underwater concrete repair solutions becomes an essential part of sustainable engineering and construction strategies.
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