论文部分内容阅读
根据地下结构承受水压及构件存在裂缝的情况,采用自制混凝土试块模具、自制可控开裂混凝土装置、自制可控压力水头装置、裂缝测宽仪组成的试验系统,在不同水压、氯离子浓度、裂缝宽度以及浸泡时间等工况下进行了开裂混凝土渗透特性试验。试验结果表明:当其他试验条件相同时,压力水头下与自然浸泡状态下的氯离子运移规律有明显的差异,压力水头作用下混凝土各层自由氯离子含量均有明显的提高;存在控制氯离子浸泡溶液运移的裂缝宽度阈值,且该阈值不受水头压力大小的影响。该试验方法可作为同类研究的借鉴和参考。
According to the subsurface structure to withstand the water pressure and the existence of cracks in components, using self-made concrete test block mold, self-made controllable cracking concrete device, self-made controllable pressure head device, crack width gauge test system composed of different water pressure, chloride Concentration, crack width and soaking time under conditions such as cracking concrete permeability test. The experimental results show that when the other test conditions are the same, there is a significant difference in the migration of chloride ions under the pressure head and the natural soaking condition, and the content of free chlorine ions in each layer of the concrete under the pressure head obviously increases. The threshold value of the crack width of the ions immersion solution is not influenced by the size of the head pressure. The test method can be used as a reference for similar studies.