PFI:AIR - TT: Establishing Manufacturing and Large-Scale Casting Process and Structural Design Criteria for Ultra-High Performance Fiber-Reinforced Concrete (UHP-FRC)

PFI:AIR - TT：建立超高性能纤维增强混凝土 (UHP-FRC) 的制造和大规模铸造工艺以及结构设计标准

• 批准号: 1414391
• 负责人: Shih-Ho Chao
• 金额: $ 20万
• 依托单位: University of Texas at Arlington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-07-15 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1414391&HistoricalAwards=false
• 关键词: PFI; AIR; TT; Establishing; Manufacturing

This PFI: AIR Technology Translation project focuses on translating concrete material science research to fill the need for advanced next-generation construction materials. These next generation materials will enhance the sustainability of infrastructure, buildings, and bridges when subjected to environmental loadings. The project will result in a large-scale cast-in-place mixing procedure and high energy input mixers, as well as design recommendations and analytical models for the design and analysis of structural members of ultra-high-performance fiber-reinforced concrete (UHP-FRC). The UHP-FRC is important because the major problem of concrete is the considerable deterioration and consequent repair work needed due to its brittleness and limited durability. The consequence of concrete deterioration and short service life requires frequent repair and eventual replacement, which consumes more natural resources. Using UHP-FRC will introduce significant enhancement in the sustainability of concrete structures due to its damage-tolerance characteristics. These characteristics can reduce significantly the amount of repair-rehabilitation-maintenance work and give infrastructure longer service life, all of which will eventually lower the environmental liability of concrete use and lead to enhanced sustainability, safety, performance, and economy of our future infrastructure. UHP-FRC has the following unique features: high compressive strength, up to 25 to 30 ksi, excellent compressive and tensile ductility beyond first cracking, and high flowability. The new mixing procedure requires no special treatments such as heat, pressure, and vacuum, thereby avoiding any major changes to current concrete production practice. This makes the conversion seamless and cost effective. In addition, the use of UHP-FRC is expected to provide greater durability, high damage tolerance, life-cycle cost savings, simplified construction, and structural efficiency when compared to the leading competing high-performance concrete that is either proprietary or requires a unique mixing procedure. The project engages a small business partner, Bailey Tools Manufacturing (BTM), to develop the large-capacity high-shear mixers and high-performance fibers, as well as the Texas Manufacturing Assistance Center (TMAC), to guide commercialization aspects, in this technology translation effort from research discovery toward commercial reality. This project addresses the following technology gap(s) as it translates from research discovery toward commercial application: 1) to develop a large-scale cast-in-place mixing design procedure and high energy input mixers; 2) to formulate design recommendations and analytical models for the design and analysis of UHP-FRC structural members. Experimental results will be used to formulate the major design aspects for UHP-FRC structural members. Once representative relationships are developed, systematic parametric evaluations will be carried out with particular attention paid to the flexural and shear design recommendations of UHP-FRC structural members. The potential economic impact is expected to be transformational, creating a more durable product with cost savings that will be clearly evident in the next 10 years. Implementation of the new equipment and technology will contribute to the U.S. competitiveness in the next-generation construction market and will reduce state funded concrete installation and repair costs by at least 25%.

该PFI：空气技术翻译项目致力于翻译具体材料科学研究，以满足对先进的下一代建筑材料的需求。 在承受环境负荷时，这些下一代材料将增强基础设施，建筑物和桥梁的可持续性。 该项目将导致大规模的现场混合程序和高能量输入混合器，以及设计和分析模型，以设计和分析超高效果纤维增强混凝土（UHP-FRC）的结构成员。 UHP-FRC很重要，因为混凝土的主要问题是由于其脆性和耐用性有限而需要进行的大量恶化和因此所需的维修工作。混凝土恶化和短期使用寿命的结果需要频繁维修和最终更换，这会消耗更多的自然资源。使用UHP-FRC将由于其容易耐受性的特性，在混凝土结构的可持续性中引入显着增强。这些特征可以大大减少维修护理维护维护工作的数量，并赋予基础设施更长的服务寿命，所有这些最终都将降低混凝土使用的环境责任，并导致我们未来基础设施的可持续性，安全性，性能和经济增强。 UHP-FRC具有以下独特的功能：高压强度，高达25至30 KSI，出色的抗压和拉伸延展性，超出了首次开裂和高流动性。新的混合程序不需要特殊的治疗方法，例如热，压力和真空，从而避免了当前混凝土生产实践的任何重大变化。这使转换无缝且具有成本效益。此外，与领先的竞争高性能混凝土相比，预计UHP-FRC的使用将提供更大的耐用性，高损伤的容忍度，生命周期成本，简化的结构和结构效率，该混凝土是专有或需要独特的混合程序。 该项目与小型企业合作伙伴Bailey Tools Manufacturing（BTM）互动，以开发大容量的高剪切搅拌机和高性能纤维，以及德克萨斯州制造援助中心（TMAC），以指导商业化方面，在从研究发现到商业现实的技术翻译工作中。 该项目解决了以下技术差距，因为它从研究发现转化为商业应用：1）开发大规模的现场混合设计程序和高能量输入搅拌机； 2）为UHP-FRC结构构件的设计和分析制定设计建议和分析模型。实验结果将用于制定UHP-FRC结构构件的主要设计方面。一旦建立了代表性关系，将进行系统的参数评估，并特别注意UHP-FRC结构成员的挠曲和剪切设计建议。 预计潜在的经济影响将具有变革性，从而创造出一种更耐用的产品，并节省成本，这将在未来10年内显而易见。新设备和技术的实施将有助于美国在下一代建筑市场中的竞争力，并将州资助的混凝土安装和维修成本降低至少25％。