Production process for producing flow-state self-compacting backfill solidified soil by using solidifying material, application and equipment thereof

Abstract

The invention discloses a production process, application and equipment for producing flow-state self-compacting backfill solidified soil by using a solidifying material, which comprises the following steps: taking soil, sludge and building residue soil as main solidifying materials, taking a catalyst and a solidifying agent as catalytic materials, taking tailings such as Portland cement, fly ash, phosphogypsum and lithium slag as auxiliary cementing materials, and adding a certain proportion of water, the mixture which has flowability and self-compaction performance and has certain strength and impermeability after being cured is formed, and the mixture can be widely applied to fertilizer groove backfilling, foundation reinforcement, road subgrade backfilling, mine goaf backfilling, municipal pipe gallery backfilling and wall decoration; according to different requirements of component properties of soil and strength of a finished product, the mass percent of each component material is as follows: 70-80% of soil; 5%-10% of a catalyst; 0.05% to 0.10% of a curing agent; 10%-20% of an auxiliary cementing material; the flowability and the water required by the reaction process are met. The material not only has high strength, but also has good flowability and water stability, is convenient to construct, is green and environment-friendly, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of backfilling solidified soil processing, in particular to a production process, application and equipment for producing fluid self-compacting backfilling solidified soil by using solidified materials. Background technique [0002] Due to the increasing number of engineering construction, with the rapid development of engineering construction, a large amount of construction waste, excavated soil, dregs, and silt generated by river management have been generated. The traditional method is to stack, discard or Landfill has not been effectively recycled and utilized, thus causing a lot of waste of land resources and soil resources. [0003] On the other hand, in the process of construction of various projects, there are often needs to improve and reinforce soil, such as foundation treatment, roadbed reinforcement, etc., as well as trenches and mine backfill operations. For these construction needs, the common...

AI Technical Summary

Problems solved by technology

For example, in foundation treatment, the in-situ deep mixing method is often used to add solidifying materials such as Portland cement to the soil, and in-situ mixing combines the soil and solidified materials to improve strength. Due to the lack of flow and operating space in this method, Uneven mixing of mechanical equipment and other problems, resulting in the treated foundation not reaching the expected strength, prone to settlement and other problems; for backfilling in narrow places such as fertilizer tanks and mines, use 28 ash soil, 37 ash soil or tailings to carry out Backfill treatment, often due to the narrow space and inconvenient construction of mechanical equipment, the backfill effect cannot meet the design requirements, resulting in quality problems

Or directly backfill with concrete and other materials, but the project cost is too high and the economic benefit is poor

[0004] In construction projects, it is usually necessary to use solidified materials to backfill foundation pits and other parts. In existing backfill projects, the solid materials used are mostly external backfill soil, and layered backfill is often used. This method not only makes the solidified material It needs to be filled from the outside, and the backfill materials need to be layered according to different levels, which is not only cumbersome to operate, but also wastes materials. At this stage, backfill soil mixed with various construction waste and other raw materials has appeared, which not only increases the utilization of construction waste At the same time, the compactness of the backfill is improved. However, the existing backfill processing equipment occupies a large space, and to realize multiple processes, different mechanical cooperation is required, which reduces the processing efficiency and increases the floor space of the equipment.

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