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Nano-Engineered Polyurethane Resin - Modified Concrete

项目名称：	Nano-Engineered Polyurethane Resin - Modified Concrete
摘要：	Latex modified concrete (LMC), also known as polymer portland cement concrete refers to hydraulic cement mixed with organic polymers that are either dispersed or redispersed in water. The dispersion of polymers in water is sometimes referred to as emulsions. When polymer emulsions are mixed with portland cement concrete, the polymer particles come together to form a polymer film coating on aggregate particles and cement grains, and seals any voids or microcracks. The resulting mixture of polymer emulsion and portland cement concrete will have higher strength, high resistance to chloride penetration and is more inert to chemical attack than plain cement. 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 will develop a Nano-Engineered Polyurethane Resin (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. Embedded within the NEPU will be grains of the ACB. Then, when combined with the ACB and water, the unhydrated 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. The characterization of NEPU including cure kinetics, rheology, UV resistance, and flame resistance will be conducted. The proposed NEPU-modified concrete will be subjected to physical and mechanical testing. The optimal composition of NEPU system will be investigated for determining the percentage by weight of nano-clay and soy-content.
状态：	Completed
资金：	16052.00
资助组织：	Research and Innovative Technology Administration<==>Missouri University of Science and Technology, Rolla
开始时间：	20130501
实际结束时间：	20131231
主题领域：	Highways；Materials；I30: Materials