EAGER: Engineering of Ultra-High Performance Cement Based Materials Using Superhydrophobic Hybridization

“这个奖项是根据2009年美国复苏和再投资法案(公法111-5)资助的。”EIGHER项目的目标是验证一个全新的、未经测试的概念：混凝土的超疏水杂交。这一概念结合了仿生学、化学和纳米技术，采用了新的跨学科视角来生产新一代混凝土，解决了与混凝土性能相关的基本问题，如耐久性和耐腐蚀性。本项目的目标是：1.评价硅氧烷外加剂、高效减水剂和矿物添加剂/辅助胶凝材料(SCM)的效果。2.实现混凝土孔隙空间的超疏水杂化概念，能够提供受控的气孔结构。3.对硅氧烷基外加剂、高效减水剂、新型超疏水外加剂、矿物外加剂/自密实混凝土的水化和微观结构发展有了基本的了解。4.评价超疏水掺合料水泥基材料的强度和耐久性，这对超高性能混凝土的设计具有重要意义。这一初步研究将为开发新型水泥基材料提供平台，包括具有超高耐久性和增加超高性能混凝土(UHPC)等矿物外加剂掺量的新型水泥基材料，以及自修复材料。此外，水泥行业目前贡献了全球高达5%的二氧化碳排放量；因此，使用更大量的矿物外加剂制成的混凝土也将以更低的成本提供更环保的解决方案。

"This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)."The objective of the EAGER project is to validate a completely new and untested concept: the superhydrophobic hybridization of concrete. This concept engages novel interdisciplinary perspectives by combining biomimetics, chemistry, and nanotechnology to produce a new generation of concrete that resolves the fundamental problems related to concrete behavior, such as durability and corrosion resistance. The objectives of the project are to 1. Evaluate the effect of: siloxane-based admixtures, superplasticizer, and mineral additives/ supplementary cementitious materials (SCMs). 2. Realize the concept of superhydrophobic hybridization of concrete pore space capable of providing a controlled air-void structure. 3. Obtain a basic understanding of concrete hydration and microstructure development with siloxanebased admixtures and superplasticizer, novel superhydrophobic admixtures, and mineral additives/SCMs. 4. Evaluate the strength and durability of cement based materials with superhydrophobic admixtures, which are important for designing UHPC to meet the performance criteria.This preliminary investigation will serve as a platform for the development of new types of cement-based materials, including those with ultra-high durability and increased volumes of mineral additives such as Ultra-High Performance Concrete (UHPC), and self-healing materials. Furthermore, the cement industry currently contributes up to 5% of global CO2 emissions; thus, the application of concrete made with higher volumes of mineral additives also will provide greener solutions at lower costs.