气泡结构对新拌混凝土工作性的影响研究

Study on the influence of bubble structure on the workability of fresh concrete

采用新拌混凝土气泡结构分析仪测定了新拌混凝土的气泡结构参数,通过灰色关联分析方法研究了气泡结构参数对新拌混凝土工作性的影响,并分析了其作用机理。结果表明:不同直径范围的气泡对新拌混凝土坍落度的影响程度不同;当含气量相近时,小直径范围内气泡含量越多,新拌混凝土中气泡的平均直径和间距系数越小,可显著提高新拌混凝土的工作性。

The bubble structure parameters of fresh concrete were measured by using the fresh concrete bubble structure analyzer,and the influence of the bubble structure parameters of fresh concrete on its workability was studied by using the grey correlation analysis method,and its mechanism of action was analyzed.The results indicate that bubbles with different diameter ranges have varying degrees of promotion on the slump of fresh concrete.When the air content is similar,the more bubbles in the small diameter range,the smaller the average diameter and spacing coefficient of the overall bubbles in the fresh concrete,which can significantly improve the workability of fresh concrete.