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.

有关混凝土早期早期强度的可靠信息可用于改善混凝土结构的安全性和经济性。 例如，可以使用可靠的现场混凝土强度测量值来确定何时获得了足够的强度，以允许去除支撑，定价转移，施加后的施加和固化的终止。 现场强度信息允许这些操作中的每一个都能尽早进行安全地进行，从而实现更经济的建设。拟议的研究的目的是继续开发一种新的测试方法，即影响 - 回声方法，用于测量就地的早期混凝土强度。 在这项研究中，将在P波速度和混凝土强度之间建立影响 - 回声方法。 这种相关关系将使用圆柱混凝土标本建立，适用于板状混凝土结构元素，例如板和壁。 这项工作代表着开发标准化测试的发展，用于使用Impact-Echo方法来测量混凝土的原位强度。