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Influence of sand angularity on standard test for strand bond
| 题名： | Influence of sand angularity on standard test for strand bond |
| 正文语种： | 英文 |
| 作者： | Jesse E. Roswurm;Chris C. Ramseyer |
| 作者单位： | University of Oklahoma |
| 关键词： | Angularity;ASTM A1081;bond;gradation;mixture;pullout;sand angularity;sand origin;strand |
| 摘要： | This project explored the influence of sand angularity on ASTM A1081, Standard Test Method for Evaluating Bond of Seven-Wire Steel Prestressing Steel Strand. The procedure specified by ASTM A1081 uses only fine aggregate in the mixture proportions. Sand angularity is a variable of interest because it could affect strand acceptance and the reliability of the ASTM A1081 strand bond test. Four sands were tested, each of which was subjected to a full ASTM A1081-style test. In addition, the angularity of each sand sample was tested via two different methods: the ASTM C1252 procedure and a visual process guided by ASTM D2488 that included the use of a scanning electron microscope and an optical digital | microscope system. Ultimately, it was determined that the angularity of the sand does influence the strand bond. This influence is generally not pronounced enough to cause a strand to fail the ASTM A1081 test. |
| 出版日期： | 2017.03-04 |
| 出版年： | 2017 |
| 期刊名称： | PCI-Prestressed Concrete Institute Journal |
| 卷： | Vol.61 |
| 期： | No.02 |
| 页码： | 101-112 |
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