A kind of unfired functional gradient composite ceramsite of engineering waste soil and its preparation method

Abstract

The invention discloses an engineering waste soil burning-free functional gradient composite ceramsite and a preparation method thereof. The amount of potassium-magnesium cement changes in a gradient from the inner core to the outer shell. The amount of engineering waste soil is reduced by 5-10% of the total mass of engineering waste soil and green potassium magnesium phosphate cement. The amount of green potassium magnesium phosphate cement is based on engineering waste soil and green potassium magnesium phosphate cement. 5-10% of the total mass of cement increases sequentially; while keeping the total mass of the two constant, the solid components of the ceramsite core are calculated by weight parts as 80-86 parts of engineering waste soil, 11-16 parts of potassium magnesium phosphate cement and wood 3-5 parts of powder, and the solid components of the shell are 15-20 parts of engineering waste soil, 76-82 parts of potassium magnesium phosphate cement and 3-5 parts of wood powder. The advantages are water purification and nitrogen and phosphorus adsorption. Performance, but also has high strength and water resistance.

Description

technical field [0001] The invention relates to the technical field of construction engineering materials, in particular to an engineering waste soil non-burning functional gradient composite ceramsite and a preparation method thereof. Background technique [0002] At present, a large amount of engineering waste soil produced in the process of urban construction is mainly piled up, which is easy to cause pollution to the surrounding environment, and also leads to the occupation of a large amount of land resources, which is not conducive to the ecological development of green cities; at the same time, the construction of sponge cities urgently needs a large amount of water regulation. Storage and purification functional materials. Therefore, using engineering waste soil to prepare non-burning ecological ceramsite with adsorption and filtering function for sponge city construction is an important way to realize resource utilization of engineering waste soil, and non-burning te...

AI Technical Summary

Problems solved by technology

These traditional waste soil-based unfired ceramsites have excellent characteristics such as low energy consumption and low cost, but they also have disadvantages such as low strength and poor water resistance, and their shortcomings become more obvious as the amount of waste soil increases; at the same time, they do not have Water storage and purification function

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