Journal article
Determination of compressive strength of lightweight aggregate concrete in service using gene expression programming based on semi-direct ultrasonic pulse velocity testing
Structural Concrete, Vol.23(4), pp.2088-2105
2022
Abstract
Structural lightweight aggregate concrete (SLWAC) can increase the ability of buildings to resist earthquakes by significantly reducing the overall weight of structures. Determining a relationship for assessing the concrete compressive strength of these structures using non-destructive methods can save both time and money. This study aims to estimate the compressive strength of SLWAC using a model of gene expression programming (GEP) and semi-direct ultrasonic pulse velocity. A hundred specimens of lightweight concrete were made using clay and natural (mineral) pumice aggregates with the maximum nominal sizes of 12.7 mm (½ inch) and 19.2 mm (¾ inch), respectively. Semi-direct ultrasonic testing of the specimens was then undertaken in the laboratory. The results show a high correlation coefficient for the equations derived from the GEP. Moreover, the equations obtained from GEP for three types of SLWAC, based on semi-direct ultrasonic pulse velocity, are compatible with equations obtained from the direct ultrasonic velocity method. The simplicity of generated equations increases the practicality and convenience in the working environment and actual conditions. The R2 (goodness of fit) values of proposed equations for LWA01, LWA02, and LWA03 specimens were 0.912, 0.962, and 0.985, respectively. It was concluded that based on the semi-direct ultrasonic pulse velocity and derived formulas, the compressive strength of SLWAC can be confidently predicted using GEP. © 2022 International Federation for Structural Concrete.
Details
- Title
- Determination of compressive strength of lightweight aggregate concrete in service using gene expression programming based on semi-direct ultrasonic pulse velocity testing
- Authors
- Saeed Jafari (Corresponding Author) - Shiraz University of TechnologyMohammad Ali Hadianfard (Author) - Shiraz University of TechnologySaeed Mahini (Author) - University of the Sunshine Coast, Queensland, National Centre for Timber Durability and Design Life
- Publication details
- Structural Concrete, Vol.23(4), pp.2088-2105
- Publisher
- Wiley-Blackwell Publishing Ltd.
- DOI
- 10.1002/suco.202000684
- ISSN
- 1751-7648
- Organisation Unit
- National Centre for Timber Durability and Design Life; University of the Sunshine Coast, Queensland
- Language
- English
- Record Identifier
- 99621539802621
- Output Type
- Journal article
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- Construction & Building Technology
- Engineering, Civil
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