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Many rivers , harbors, lakes dredging process will generate a lot of dredging sludge , dredging sludge disposal at sea or on land prone to the surrounding environment causing great harm. Dredging sludge with high organic matter , high water content, high compressibility , low-intensity causing heap space abandoned base stability is poor, insufficient capacity and must be cured . After curing dredging sludge can be used as main embankment , road works , reclamation fill material. In this paper, urban sludge dredged material composition, chemical composition characteristics as the starting point , through the indoor physical chemistry and mechanical tests on soil curing agent for effective contrast , to carry out dredging sludge curing time and the controllability of the early strength ; from microstructure perspective , explore the sludge in the early strength of the curing process of the evolution of the microstructure features . Main work and conclusions are as follows : 1. According to relevant research experience , combined with the characteristics of the sludge dredged from the economic and practical way to elect several curing agent. (2) Study of a single and composite curing agent curing effect of different proportions , the optimized combination of materials and proportioning . Tests showed that adding an appropriate gypsum in cement stabilized soil can improve the early strength , better than fly ash . 3 comparative study of different curing agents and curing different combinations of different soil moisture curing effect , explore the incorporation of materials , curing period , soil moisture content on stabilized soil strength parameters were investigated. 4 by liquid nitrogen freeze-dried sample was prepared sample preparation techniques , using scanning electron microscopy to obtain a cured soil microstructure image , using MATLAB programming language, calculate its microstructural parameters , a preliminary analysis of the role of soil under different curing agents changes in microstructure . 5 summarizes the work on this article , and the prospects for future research work .
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