A multi-source solid waste composite high-fluid backfill material and its preparation method and application

Abstract

The invention discloses a multi-source solid waste composite high-fluid backfill material, a preparation method and application thereof. The backfill material includes 950-1050 parts of muck, 40-60 parts of cement, 10-20 parts of superfine slag powder, 10-20 parts of fly ash, 20-30 parts of phosphogypsum, 7-15 parts of high-efficiency curing agent, water 275-525 parts; Among them, the high-efficiency curing agent includes 50-70 parts of sulfonated formaldehyde-acetone polycondensate, 20-30 parts of water glass, 10-20 parts of sodium lauryl sulfate, and 10-20 parts of water-soluble epoxy resin , 0-10 parts of sulfonated oil, 0-10 parts of sodium sulfate, 0-10 parts of polyacrylamide, water glass, water-soluble epoxy resin and polyacrylamide are calculated according to the active ingredients. The backfill material is self-compacting, has high strength and good durability, and has low requirements on muck and construction environment. It is suitable for the construction of foundations and foundation trenches, and has a high utilization rate of muck, low cost, and is environmentally friendly. It has broad application prospects. .

Description

technical field [0001] The invention relates to the field of civil engineering materials, in particular to a multi-source solid waste composite high-fluid backfill material and the application of its preparation method. Background technique [0002] At present, in the process of construction in my country, soil backfilling is mostly used for foundation and foundation trench treatment. The traditional backfill method requires a lot of manpower and uneven mixing, which leads to high cost, uneven backfill and other problems, and the utilization rate of spoil is low, and it is difficult to construct foundation trenches with special-shaped facets. Although the follow-up construction uses cement and curing agent to stabilize the soil, the backfill also has problems such as high labor and material costs, low soil strength, and poor impermeability. On the other hand, with the development of urban construction and the advancement of urbanization, a large amount of construction spoil...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-purpose backfilling method to overcome the traditional backfilling methods that require a lot of manpower, high cost due to uneven mixing, uncompact backfilling, low utilization rate of spoil, and difficult construction of foundation trenches with special-shaped facets. Source-solid-waste composite high-fluidity backfill material and its preparation method and application, the backfill material has a high fluidity, can be self-compacting, has low requirements on muck composition, moisture and construction environment, and is suitable for construction of foundations and foundation trenches and other sites , the solidified soil has higher strength, better durability, and lower cost, fast construction speed, less manpower required, low requirements on the surrounding environment of construction, environmentally friendly, and has broad application prospects

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