Velocity-strength relationship of concrete by impact-echo method
- Authors
- Lee, HK; Yim, H; Lee, KM
- Issue Date
- Jan-2003
- Publisher
- AMER CONCRETE INST
- Keywords
- curing; early ages; early strength; high-strength concrete; water-cementitious material ratio
- Citation
- ACI MATERIALS JOURNAL, v.100, no.1, pp.49 - 54
- Journal Title
- ACI MATERIALS JOURNAL
- Volume
- 100
- Number
- 1
- Start Page
- 49
- End Page
- 54
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/26014
- ISSN
- 0889-325X
- Abstract
- This paper describes using, the impact-echo method to evaluate the early-age strength of normal- and high-strength concrete. Impact-echo and compression tests were carried out between 12 h and 28 days to measure the rod-wave velocity and compressive strength, respectively, of concrete specimens. with various water-cementitious Material-ratios (w/cms) between 0.58 and 0.27. Test results demonstrate that the velocity-strength relationship of normal-strength concrete with w/cms ranging from 0.58 to 0.35 is noticeably different from that of high-strength concrete with w/cms below 0.35. Also noted, in this study is that the velocity-strength relationship of normal-strength concrete was influenced by. the curing age of the specimen. The addition of fly ash (FA) had little influence on the velocity-strength relationship of either normal- or high-strength concrete specimens. Based on these observations, formulae to determine the,,relationship between the strength and wave velocity of concrete were proposed that incorporate the effects of the w/cm and the curing age of the specimen.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Mechanical and System Design Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.