Nano-Engineered Polyurethane Resin-Modified Concrete

摘要

The goal of the proposed work is to investigate the application of nano-engineered polyurethane (NEPU) emulsions for latex modified concrete (LMC). NEPU emulsions are non-toxic, environment friendly, durable over a wide wide temperature range, provide better adhesion, high strength, less cracking, and compatible with all mortar types. One of the weak links in a cement-aggregate composite material is the bond between the matrix and the aggregates. To improve the performance of the alternative cement binder (ACB), the research team intends to develop a NEPU resin to act as an intermediary between the aggregates and the ACB matrix. The NEPU will be used to precoat the aggregates prior to their placement within the ACB matrix. When and water, the combined with the ACB un-hydrated ACB particles embedded within the NEPU-coated aggregates will react with the surrounding matrix during hydration, providing an enhanced interfacial zone and corresponding improvement in the material properties of the hardened material. In the proposed work, the used of bio-based NEPU emulsion for LMC application will also be investigated.