RIA: In-Place Determination of Early-Age Concrete Strength in Slabs and Walls Using the Impact-Echo Method

RIA：使用冲击回波法现场测定板和墙的早期混凝土强度

• 批准号: 9109428
• 负责人: Stephen Pessiki
• 金额: $ 7万
• 依托单位: Lehigh University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-06-15 至 1993-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9109428&HistoricalAwards=false
• 关键词: RIA; Place; Determination; Early; Age

Reliable information about the in-place early-age strength of concrete can be used to improve the safety and economy of concrete construction. For example, reliable measurements of in-place concrete strength can be used to determine when adequate strength has been obtained to allow removal of shoring, transfer of prestressing, application of post-tensioning, and termination of curing. In-place strength information allows each of these operations to proceed safely and at the earliest possible time, leading to more economical construction. The objective of the proposed research is to continue development of a new test method, the impact-echo method, for measuring in-place early age concrete strength. In this study, the impact-echo method will be established between P-wave velocity and concrete strength. This correlation relationship will be established using cylindrical concrete specimens is applicable to plate-like concrete structural elements such as slabs and walls. This work represents an advancement towards the development of a standardized test for measuring the in-place strength of concrete using the impact-echo method.

有关早期强度的可靠信息 提高混凝土的安全性和经济性 建设 例如，可靠的测量 混凝土强度可以用来确定何时有足够的强度 允许拆除支撑，转移 预应力、后张拉的应用和 固化 在适当的强度信息允许每一个这些 安全地进行手术，并在尽可能早的时间， 从而导致更经济的构造。的目的 建议的研究是继续开发新的测试方法， 冲击回波法，用于测量现场早龄期混凝土， 实力 在这项研究中，冲击回波法将 P波速度和混凝土强度之间的关系。 这 相关关系将建立使用圆柱 混凝土试件适用于板状混凝土结构 板和墙等图元。 这项工作代表了一个 在制定一项标准化测试方面取得进展 用冲击回波法测量混凝土的现场强度 法