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Laboratory and in situ investigation of the compressive strength of CFRD concrete

Vatani Oskouei, A ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1016/j.conbuildmat.2020.118166
  3. Publisher: Elsevier Ltd , 2020
  4. Abstract:
  5. One of the most essential and costly stages in Concrete Face Rockfill Dams (CFRD) construction is to implement the concrete at the upstream face of the dam without joints. As the face concrete is considered as the most integral part to prevent water penetration in CFRDs, it's quality control is of paramount importance. One of the conventional approaches for quality control of the concrete which is used in CFRD is the compressive strength of laboratory samples. The comparison of laboratory and in situ measurements provides information about the accuracy of the obtained results. This research investigates the correlation of concrete compressive strength determined by using different methods in the dam face. In general, it is not possible to establish a connection between the compressive strength of experimental samples and in situ concrete. In this regard, this study aims to find out the relation between destructive (experimental samples) and nondestructive (Schmidt hammer, Ultrasonic Pulse Velocity Method) tests of the concrete implemented in the dam face. Moreover, statistical and probability study is conducted to investigate the importance of input variables as well as develop the predictive model for concrete compressive strength. The results indicate satisfactory agreement between the data obtained with the in situ methods and laboratory tests. Further, the results of analysis of variance show that the concrete temperature is the most important factor in the concrete compressive strength. © 2020
  6. Keywords:
  7. ANOVA ; CFRD ; Concrete compressive strength ; Concrete monitoring ; Non-destructive ; Predictive model ; Schmidt Hammer ; Ultrasonic ; Analysis of variance (ANOVA) ; Compressive strength ; Dams ; Hammers ; Laboratories ; Quality control ; Sandwich structures ; Ultrasonic testing ; Ultrasonics ; Non destructive ; Predictive modeling ; Concretes
  8. Source: Construction and Building Materials ; Volume 242 , 2020
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0950061820301719