High performance concrete is widely used in key infrastructure projects due to its advantages such as low water cement ratio, high strength, and high density.
However, low water cement ratio systems are prone to significant self drying effects during the hydration process, leading to self shrinkage and early microcracks, reducing structural durability and limiting their engineering applications.
Super absorbent resin (SAP) is a three-dimensional network cross-linked polymer additive with strong water absorption, retention, and slow-release capabilities.
It can form a “micro reservoir” inside concrete and continuously replenish water and inhibit shrinkage through internal curing.
It is a new functional material that improves the crack resistance and durability of high-performance concrete.
This article summarizes the material properties, modification mechanism, impact on concrete performance, and future research directions of SAP based on domestic and foreign research results.
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