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对细集料进行逐级筛分并清洗烘干,向0.075mm以下的石粉中掺入不同类型粘土,分析不同粘土含量下,细集料的技术指标砂当量和亚甲蓝之间的相关性;分析细集料中石粉的塑性指数。通过灰色关联方法,找出粘土含量对细集料中各项技术指标和石粉塑性指数的影响程度。研究结果表明,粘土含量越大,砂当量越小,亚甲蓝值越大,石粉的塑性指数越大;粘土含量对砂当量影响最大,塑性指数次之,亚甲蓝最小;掺入粉土时,细集料砂当量与亚甲蓝线性相关;掺入高液限土时,细集料砂当量与亚甲蓝非线性相关。
The fine aggregate was sieved step by step and cleaned and dried to incorporate different types of clay into the powder below 0.075 mm. The correlation between the sand equivalent of the fine aggregate and methylene blue at different clay contents was analyzed Analysis of plastic index of fine aggregate powder. Through the gray relational method, the influence of clay content on each technical index and stone plasticity index in fine aggregate was found out. The results show that the larger the clay content, the smaller the sand equivalent, the larger the methylene blue value, the greater the plastic index of the stone powder; the clay content has the greatest effect on the sand equivalent, followed by the plasticity index and the smallest methylene blue; , The sand equivalent of the fine aggregate is linearly related to methylene blue; when the high liquid limit soil is incorporated, the sand equivalent of the fine aggregate correlates with the non-linearity of methylene blue.