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KANSAS WATER-CEMENT RATIO METER: PRELIMINARY RESULTS.
| 题名： | KANSAS WATER-CEMENT RATIO METER: PRELIMINARY RESULTS. |
| 作者： | Hossain-M; Koelliker-J; Ibrahim-H; Wojakowski-J |
| 关键词： | WATER-CEMENT-RATIO; FRESH-CONCRETE; CONCRETE-STRENGTH; MEASURING-EQUIPMENT; PROTOTYPES-; TURBIDITY-; WATER-CEMENT-SLURRY; TEST-RESULTS; STATISTICAL-ANALYSIS; ACCURACY-; EQUIPMENT-COST; FIELD-MEASUREMENTS; QUALITY-CONTROL; CONCRETE-CONSTRUCTION |
| 摘要： | The water-cement ratio of fresh concrete is recognized as the one factor that affects the strength and durability of an adequately compacted concrete mix. Although water-cement ratio is the predominant factor affecting strength of hardened concrete, currently no widely used, reliable method is available for measuring water-cement ratio in the field. A prototype device has been developed to measure the water-cement ratio of a plastic concrete mix. The method is based on the measurement of turbidity of water-cement slurry separated out of a concrete mixture by pressure sieving. Consistent results were obtained for air-entrained and non-air-entrained concrete. Statistical analyses of the test results have shown that this meter can measure the water-cement ratio of fresh concrete with an accuracy of +/-0.01 on the water-cement ratio scale for a single test at a 90% confidence interval. The equipment will cost less than $10,000. If the method works as well in the field as it does in the laboratory, accurate determination of water-cement ratio could dramatically improve the ability of the concrete industry to ensure the quality of concrete construction. |
| 总页数： | Transportation Research Record. 1996. (1532) pp73-79 (12 Fig., 2 Tab., 8 Ref.) |
| 报告类型： | 科技报告 |
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