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. ***

9313062 Buyukozturk这个项目将研究砂浆聚集材料界面在高强度混凝土复合材料的机械行为上的作用。 该项目的一般目标是建立通过对材料作为由高强度砂浆和骨料系统组成的复合材料的研究来管理高强度混凝土强度，刚度和延展性的基本标准。 重点是界面韧性在复合材料行为上的作用。 基于断裂力学的实验室实验和数值研究将对具有高强度砂浆基质和具有不同材料特性组合的聚集体组合具有具有控制界面断裂特性的混凝土模型进行。 各种迫击炮/聚合系统的所需界面断裂韧性数据将根据以前的研究开发的方法评估。 使用受控量的二氧化硅烟雾实现的界面强度的变化将在特性的参数研究中实施。 预计该研究将提供有关砂浆聚集界面对高强度混凝土行为的影响的基本知识，并直接以有效，经济和良好的方式对其生产和使用产生影响。 ***