Red mud phosphogypsum hydraulic road base course, red mud phosphogypsum hydraulic road base course material and preparation method of red mud phosphogypsum hydraulic road base course material

Abstract

The present invention discloses a red mud phosphogypsum hydraulic road base course, a red mud phosphogypsum hydraulic road base course material and a preparation method of the red mud phosphogypsum hydraulic road base course material, and relates to the field of road engineering construction. The preparation method comprises: weighing 10-50% of phosphogypsum and 90-50% of red mud, and uniformly mixing and strring to obtain a primary mixing material; weighing 85-92% of the primary mixing material and 15-8% of ordinary Portland cement, and uniformly mixing and strring to obtain a premix; and weighing 99.7-99.95% of the premix and 0.3-0.05% of a hydraulic curing agent, uniformly mixing and strring to obtain a mixture, and controlling the water content of the mixture to 14-18% to obtain the base course material, wherein the hydraulic curing agent is obtained by mixing the following components by mass: 40-80% of an elastic styrene-acrylic emulsion, and 60-20% of nanometer silicon sol. According to the present invention, the road base course is prepared by using the road base course material according to the standard road base course construction method; the red mud and the phosphogypsum are used to produce the road base course material, such that the pollution of the red mud and the phosphogypsum on the environment is reduced, and the waste is turned into treasure; and the formed road base course has characteristics of strong cracking resistance, corrosion resistance, and long service life.

Description

technical field [0001] The invention relates to the field of road engineering construction, in particular to a red mud phosphogypsum hydraulic road base, a road base material and a preparation method thereof. Background technique [0002] Red mud is a waste produced by the alumina industry, and about 1.0-1.3 tons of red mud is produced for every 1 ton of alumina produced. Because the chemical bonds bound by red mud are difficult to remove, and the content is large, and it contains fluorine, aluminum and other impurities, it has been difficult to carry out harmless utilization of red mud. Red mud stockpiling not only requires a certain amount of infrastructure costs, but also takes up a lot of land and pollutes the environment. Because red mud contains a large amount of strong alkaline chemical substances, its pH value is still 11.25 to 11.50 after being diluted 10 times. The extremely high pH value determines the strong corrosion of red mud to organisms, metals, and siliceo...

AI Technical Summary

Problems solved by technology

At present, the effective utilization rate of phosphogypsum in China is less than 10%. Only a very small amount of phosphogypsum is used to produce building materials, and the remaining huge amount of phosphogypsum is piled up as solid waste. Harmful heavy metal chemicals such as arsenic, cadmium, and mercury pollute the environment

The road base formed by fly ash gravel is a semi-rigid base, which has obvious hydraulic and retarding properties. However, once the aggregates, lime and fly ash are combined, the chemical reaction inside stops, and the road matrix formed is too rigid and easy to build. Cracked by temperature and humidity, poor crack resistance