Estimating the Distribution of Air Voids in Concrete
Chord length measurements are used to estimate the volumetric distribution of air voids within hardened concrete samples. The accuracy of the Linear-Traverse method is questionable because chord lengths do not directly represent the actual volumes of the air voids. Using computer simulation, randoml...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Petra Christian University
2011-01-01
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| Series: | Civil Engineering Dimension |
| Subjects: | |
| Online Access: | http://puslit2.petra.ac.id/ejournal/index.php/civ/article/view/18103 |
| Summary: | Chord length measurements are used to estimate the volumetric distribution of air voids within hardened concrete samples. The accuracy of the Linear-Traverse method is questionable because chord lengths do not directly represent the actual volumes of the air voids. Using computer simulation, randomly generated concrete samples were analyzed using the Linear-Traverse method to compute the distribution of air voids, the chord length gradation curve, the chord length-to-traverse ratio, and the air void volume gradation curve. The current chord-length approach significantly underestimated the air void content. A method that estimates that air void gradation curve from the chord length gradation curve is presented. The computer simulation results are supported by a conceptual analysis. To obtain the most accurate estimate of the air void content, computer analyses showed that at least 15 traverse lines should be regularly spaced on the concrete sample. |
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| ISSN: | 1410-9530 1979-570X |