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PRELIMINARY INVESTIGATION ON EFFECTS OF MOISTURE ON CONCRETE PAVEMENT STRENGTH AND BEHAVIOR.
| 题名： | PRELIMINARY INVESTIGATION ON EFFECTS OF MOISTURE ON CONCRETE PAVEMENT STRENGTH AND BEHAVIOR. |
| 作者： | Buch-N; Zollinger-DG |
| 关键词： | MOISTURE-CONTENT; CONCRETE-PROPERTIES; CONCRETE-PAVEMENTS; DRYING-; TEST-SPECIMENS; HUMIDITY-; TEMPERATURE-; STRESSES-; CRACK-CONTROL |
| 摘要： | The effects of moisture on pavement concrete properties and behavior are reviewed. Drying of concrete is investigated in terms of Gibbs free energy. A nondestructive system was devised to measure the change in relative humidity with time. The relative humidity and temperature changes within the body of the specimen were measured using humidity and temperature sensors; these sensors were connected to a continuous data logging device. The humidity profile shows that drying in the surface layers is greater than in the interior concrete. Moisture content measurements indicate that the strength of concrete is dependent on the relative humidity. From the experimental results, it can be concluded that as concrete dries, the stress levels increase under varying restrained conditions. This observation may be useful to pavement engineers using certain assumptions in determining when to introduce a saw cut in a freshly constructed rigid pavement. Thus, on the basis of the determination of the change in relative humidity, a system of crack control may be devised. |
| 总页数： | Transportation Research Record. 1993. (1382) pp26-31 (1 Phot., 9 Fig., 3 Tab., 12 Ref.) |
| 报告类型： | 科技报告 |
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