Phosphogypsum water hard road material and preparation method thereof

Abstract

The invention provides a phosphogypsum water hard road material and a preparation method thereof. The road material is prepared from the following raw materials by weight percent: 77 to 88 percent ofphosphogypsum, 0 to 8 percent of alkaline mineral waste residue, 0 to 6 percent of lime, 4 to 16 percent of cement, and 0.2 to 0.8 percent of curing agent, wherein the curing agent is prepared from the following raw materials by weight percent: 1 to 5 percent of cationic chelate, 0.01 to 0.035 percent of nano oxide, 0.1 to 0.2 percent of cross-linking agent, 0 to 0.4 percent of quinoline oxide, and 1 to 5 percent of metal salts, and the curing agent also comprises a water reducing agent, a curing accelerant and an anti-seepage agent. The phosphogypsum is used for producing the road material which can substitute the traditional road basic layer and road water stabilizing layer; and by integrating the road basic layer and the road water stabilizing layer, convenience in construction can be realized, the environmental pollution can be reduced, and waste can be converted into treasure; and a formed road layer is high in cracking resistance, unlikely in corrosion and long in service life.

Description

technical field [0001] The invention relates to the field of road engineering construction, in particular to a phosphogypsum hydraulic road material and a preparation method thereof. Background technique [0002] The highway construction industry is the basic industry of the economy and plays a vital role in the development of the national economy. At present, my country's highways are far ahead of the sum of other modes of transportation in terms of passenger traffic, freight volume, and passenger turnover. However, with the rapid development of roads, especially expressway construction, the problem of premature destruction of large areas of roads is also very prominent. Many newly-built or recently overhauled national and provincial roads have experienced serious early damage, which is far behind the design service life. Reasons for premature failure of concrete pavement include design, construction and use reasons. [0003] Phosphogypsum is a solid waste discharged dur...

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

In cement-stabilized soil, cement, as a hydraulic material, produces colloids when it meets water. These colloids cannot form a unified whole in the soil, and will also destroy the structure and connection of the soil itself, resulting in a large number of unstable spaces. Under the intrusion and temperature changes, it will become very fragile, so the road base formed by cement stabilized soil is very easy to crack and has poor crack resistance

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