Novel steel slag composite soil road base material and preparation method thereof

Abstract

The invention discloses a steel slag composite soil road base material and a preparation method thereof. The steel slag composite soil road base material contains the following materials in parts by weight: 0-15 parts of water, 40-80 parts of common soil, 20-60 parts of steel slag without ageing treatment, 5-25 parts of complexing agent, 1-5 parts of cement, and 0.01-0.05 part of modifying agent.The preparation method comprises the following steps: mixing the steel slag, the soil, the cement and the complexing agent and then performing a compaction test, and testing to obtain an optimal watercontent; smashing the steel slag; spraying tap water accounting for 50% of the total water amount, and sufficiently blending the steel slag with the complexing agent, to obtain a slag-powder mixture;spraying the modifying agent to the common soil and doping the redundant tap water, to obtain modified soil; blending and compacting the slag-powder mixture, the modified soil and Portland cement, toobtain a road base material. The steel slag composite soil road base material and the preparation method can sufficiently realize recycling of metallurgic solid water resource, and reduce pollution to the environment in the steel slag stacking and ageing process; also can effectively save the sandstone material, and avoid destruction of the ecological environment caused by sandstone material mining, and has remarkable economical and social benefits.

Description

technical field [0001] The invention relates to the technical field of road base material and its preparation, in particular to a novel steel slag mixed soil road base material and a preparation method. Background technique [0002] With the rapid development of the steel industry, the discharge of steel slag is increasing year by year. my country, as a major steel producer in the world, calculates that 0.2-0.5 tons of steel slag is produced for every ton of crude steel produced. The annual output of steel slag in my country is about 50 million tons, and the accumulated steel slag has reached more than 6 billion tons. A large amount of steel slag cannot be effectively disposed of, which not only occupies a large amount of land, pollutes the environment, but also causes a waste of resources; in addition, as the country attaches importance to environmental protection issues, the price of high-quality natural sand and gravel continues to rise. Stabilized gravel has a large dem...

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Problems solved by technology

[0010] Based on the above reasons, the present invention aims at the problem of poor stability of unaged steel slag, mixes the composite agent, utilizes the silicon dioxide contained in it to chemically react with free calcium oxide in the steel slag to form digestion, and utilizes the slaked lime alkali in the composite agent to stimulate the potential gelation of steel slag; at the same time, add modifiers to ordinary soil and mix them

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