Behavior of High Strength Concrete Composites Influenced by Interfacial Fracture Properties

界面断裂性能影响高强混凝土复合材料的行为

• 批准号: 9313062
• 负责人: Oral Buyukozturk
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-01-15 至 1997-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9313062&HistoricalAwards=false
• 关键词: Behavior; Strength; Concrete; Composites; Influenced

9313062 Buyukozturk This project will investigate the role of mortar-aggregate interfaces on the mechanical behavior of high strength concrete composites. the general objective of the project is to establish the fundamental criteria governing the strength, stiffness and ductility of high strength concrete through studies of the material as a composite consisting of a high strength mortar and aggregate system. the emphasis will be on the role of interface toughness on the composite material behavior. Fracture mechanics based laboratory experiments and numerical studies will be performed on concrete models with high strength mortar matrix and aggregate inclusions having different material property combinations with controlled interface fracture characteristics. The required interface fracture toughness data for various mortar/aggregate systems will be assessed based on the approach developed through previous research. The variation of interface strength, achieved using controlled amounts of silica fume, will be implemented in the parametric studies for the properties. The research is expected to provide a fundamental knowledge of the effects of mortar-aggregate interfaces on high strength concrete behavior and to have a direct impact on its production and use in an efficient, economical, and sate manner. ***

小行星9313062 本计画将探讨砂浆-集料界面对高强度混凝土复合材料力学行为之影响。 该项目的总目标是通过研究高强度混凝土作为由高强度砂浆和骨料系统组成的复合材料，建立控制高强度混凝土强度、刚度和延展性的基本标准。 重点将放在界面韧性对复合材料行为的作用上。 基于断裂力学的实验室试验和数值研究将在混凝土模型与高强度砂浆基体和骨料进行 夹杂物 具有 不同 材料 具有受控界面断裂特征的性能组合。 所需的界面断裂韧性数据的各种砂浆/骨料系统将评估的基础上，通过以前的研究开发的方法。 界面强度的变化，实现使用控制量的硅灰，将在参数研究的属性。 该研究将为研究砂浆-骨料界面对高强混凝土性能的影响提供基础知识，并对高强混凝土的生产和使用产生直接影响。 ***