Method for filling urban road roadbed with slag

Abstract

The invention provides a method for filling an urban road roadbed with slag. The method comprises the following steps: step 10: paving the clay with plasticity index greater than or equal to 6 at theroadbed bottom and forming a bottom sealing layer;step 20: paving the slag, with stable performance after the treatment of hot splashing, water quenching, hot sealing or aging, on the bottom sealing layer and forming a lower-layer embankment; step 30: paving the clay with plasticity index greater than or equal to 6 at the top of the lower-layer embankment, and forming an interlayer; step 40: paving the slag, with stable performance after the treatment of hot splashing, water quenching, hot sealing or aging, on the interlayer and forming an upper-layer embankment; step 50: paving lime-ash soil,37 lime earth or cement stabilized soil at the top of the upper-layer embankment and forming a top sealing layer; step 60: paving the clay with plasticity index greater than or equal to 6 at the periphery of the lower-layer embankment, the periphery of the interlayer and the periphery of the upper-layer embankment, and forming a revetment. The method provided by the invention can realize large-scale utilization of the slag.

Description

Technical field [0001] The invention is a method for filling urban road subgrade with steel slag. Background technique [0002] Steel slag is a kind of industrial solid waste produced in the steelmaking process. It mainly comes from the slagging materials (such as limestone, dolomite, silica, etc.) added in the steelmaking process, oxides produced by the oxidation of various elements in the metal charge, and corroded The impurities brought in by the lining material and metal charge can be divided into converter slag, open hearth slag, and electric furnace slag according to the furnace type. The discharge amount is about 8% to 15% of the crude steel output. With the development of national industrialization and infrastructure construction, the iron and steel industry has developed rapidly, and the output of steel has increased year by year, and the amount of steel slag produced as a by-product of the steelmaking industry has increased year by year. According to a report by the Ec...

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Problems solved by technology

[0003] It is imminent to realize the resource utilization of steel slag and protect the environment. At present, steel slag has been used as iron and steel smelting flux, building materials, soil improver, adsorbent, etc. However, the consumption of steel slag for these purposes is very limited, and the large-scale utilization of steel slag has not yet been solved. be effectively resolved

Such a huge amount of steel slag, as a kind of industrial solid waste, cannot be used on a large scale. It is piled up all year round, which not only occupies a large amount of land resources, but also causes varying degrees of pollution to surrounding soil and groundwater, and is a waste of resources.

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