Research on Construction Technology of Phosphogypsum Stabilized Red Clay Subgrade
In order to make full use of phosphogypsum solid waste resources and improve the engineering characteristics of red clay,based on field tests,this paper studies the construction technology,construction process,and the control and detection of three important parameters,which are moisture content,cement content and compaction degree,of cement phosphogypsum stabilized red clay subgrade,relying on the reconstruction and expansion project of National Highway G210 Duyun Yang'an-Yingshan Highway,using phosphogypsum-stabilized red clay as subgrade filler.According to the characteristics of the material,the problems of limited conditions and difficult quality control are solved by standardizing the process of mixing at the soil taking site and the mixing method by the plant-accompanied method,and adopting the methods of strict coverage and transportation,specific paving,leveling and rolling.The results show that the subgrade quality of the test section is good,the deflection settlement,flatness and settlement meet the standard requirements,and the mixture of cement:phosphogypsum:red clay=5∶47.5∶47.5 can be used as the subgrade filler.
phosphogypsumred clayconstruction technologyquality control
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