Curing method for waste soil combined treatment

Abstract

A curing method for waste soil combined treatment comprises the following steps: adding a certain amount of quick lime to slurry to be treated based on the water content of the slurry to be treated, and uniformly stirring, wherein the slurry is alkalinized during being stirred; determining the alkali content of modified soil based on the quantity of doped lime, and setting the alkali content as A%; determining the mixing ratio of a curing material based on the alkali content A% of the slurry modified soil; uniformly stirring based on the ratio of modified soil to industrial solid aluminosilicate waste to flue gas desulfurization gypsum of 100: (3A-4A): (A-2A); and uniformly mixing the obtained mixture and waste soil based on the ratio of 1: 1-1: 6, wherein the finished product is applicable to backfill and soft foundation curing. According to the method, the slurry can be quickly treated, and the problems of dropping, scattering and leaking in transportation can be avoided; the treatedslurry can be used as the soil curing exciting material and matched with the industrial slags to realize combined curing of other waste soil, so that the waste soil can be effectively recycled; the wastes are cured through the wastes; the method is green and environmentally friendly, and meets the requirement of sustainable development.

Description

【Technical field】 [0001] The invention belongs to the technical field of environmental protection engineering, and in particular relates to a curing method for composite treatment of waste soil. 【Background technique】 [0002] The silt slurry produced by river dredging and the engineering waste slurry produced by engineering construction have high water content, flow plasticity, and extremely poor engineering performance. Common treatment methods mainly include: natural sedimentation of mud at the construction site and use of tank trucks to transport mud to the outer suburbs for natural drying. [0003] The disadvantage of natural sedimentation of mud at the construction site is that the mud pool required for sedimentation of mud occupies a large area, and the site resources of the construction site are limited. At the same time, large-scale mud treatment will pollute the environment of the construction site. [0004] The disadvantages of using tank trucks to transport mud ...

AI Technical Summary

Problems solved by technology

However, the performance of the Sinotrans mud project is still extremely poor, and it cannot be used as engineering soil. It can only be piled up and discarded as waste soil, which poses a safety hazard to the environment.

If secondary curing is used, the curing effect of primary treatment and secondary treatment cannot be superimposed

The soil curing agent quickly treats the mud. After being transported outside, the solidified mud needs to be broken and stirred for the second curing. Therefore, the curing effect of the first treatment will disappear and be wasted. Therefore, the curing effect of the two curing treatments cannot be superimposed, and even produce a reaction ( High-efficiency flocculants are often organic chemicals, which tend to inhibit the hydration of hydraulic materials, and the soil curing agent in the secondary treatment is mainly hydraulic materials. The amount is greatly increased), resulting in a substantial increase in processing costs, so it is difficult to implement in actual engineering

[0005] In summary, the main disadvantages of the prior art are: 1. When processing mud, the time required for low-cost processing means is too long, and the processing cost required by the method with short processing time is too high; The coordination of processing and utilization is poor, and resource utilization is difficult

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