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首页> 外文会议>Fourth International Conference on Repair, Rehabilitation, and Maintenance of Concrete Structures, and Innovations in Design and Construction Seoul, Korea, September 2000 >Substrate Absorption and Its Influence on Plastic Shrinkage of Repair Material
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Substrate Absorption and Its Influence on Plastic Shrinkage of Repair Material

机译：基质吸收及其对修补材料塑性收缩的影响

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摘要

The moisture condition of the substrate surface prior to repair influences the plastic shrinkage and resultant physical properties of the repair material after repair. Absorption of moisture by the substrate may cause not only plastic shrinkage of the repair material adjacent to the interface, but also expansion at the surface to be repaired due to uptake of moisture and may lead to the premature debonding of the repair material. In this investigation, substrate prisms of four different thicknesses (30, 48, 66 and 100mm) under three different moisture condition (oven dry, natural dry and saturated surface dry) were employed to investigate the absorption and expansion of the substrate when it is immersed in water or comes into contact with the freshly cast repair material. Based on the test results obtained, a suitable pre-wetting time before repair work is begun is proposed.
机译：修复之前基材表面的水分状况会影响修复后修复材料的塑性收缩和物理性能。基材吸收的水分不仅会导致与界面相邻的修复材料发生塑性收缩，而且还会由于吸收水分而在待修复表面发生膨胀，并可能导致修复材料过早剥离。在这项研究中，采用三种不同湿度条件（烘箱干燥，自然干燥和饱和表面干燥）的四种不同厚度（30、48、66和100mm）的基质棱镜来研究基质在浸入时的吸收和膨胀在水中或与刚铸造的修补材料接触。根据获得的测试结果，建议在维修工作开始之前合适的预润湿时间。

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