Research on Gradation Control of Fully Recycled Cement Stabilized Crushed Stone Mixture
By conducting screening tests on multiple mixtures,the variation standard deviation of the gradation of the prepared mixture is obtained.On the basis of taking the target gradation as the median,the variation standard deviation is added or subtracted to determine the upper and lower limits of gradation control.The changes in grada-tion after the compaction and forming of multiple mixtures are compared to obtain the law of intermediate grada-tion changes of waste concrete recycled aggregates during mixing,transportation,and forming.By adjusting the tar-get synthesis ratio,the impact of gradation variation of recycled aggregates on the formation gradation of the mix-ture in various production stages is reduced,achieving the goal of optimizing the gradation of fully recycled mixtures.
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