Formula and preparation method of polymer composite flow type dredged silt solidified soil

A dredging sludge and flow-type technology, applied in the field of engineering material preparation, can solve the problems of high construction cost, increase the curing effect of cement content, insufficient output, etc., achieve good tensile and shear resistance, and meet the requirements of pumping Construction requirements, the effect of rapid early strength growth

Inactive Publication Date: 2021-02-05
江苏叁山生态环境发展有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the increase of the amount of dredged sludge to be treated, the cost of simply using cement as a curing agent is too high, and often due to the complex composition of dredged sludge, its high water content, particle components and content, organic matter type and content, and pH value etc. The same project also changes from time to time, and the curing effect is not ideal when the cement content is increased
Although the existing new curing agents are generally better than traditional curing agents such as cement, they have problems such as insufficient output, high cost, and poor durability, and are not suitable for curing a large number of dredged sludge
In addition, the existing dredging sludge solidification treatment mostly adopts the mixing solidification method, which has low construction efficiency and high construction cost, and cannot meet the large-scale and high-efficiency dredging sludge application requirements

Method used

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  • Formula and preparation method of polymer composite flow type dredged silt solidified soil
  • Formula and preparation method of polymer composite flow type dredged silt solidified soil
  • Formula and preparation method of polymer composite flow type dredged silt solidified soil

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: choose 3 kinds of dredged silt samples for test, and the physical index of silt is as follows:

[0022]

[0023] The cement used in this patent implementation case is P·O42.5 grade cement that complies with the provisions of "Universal Portland Cement GB175-2007". Steel slag powder is selected to meet the requirements of "Steel Slag Powder Used in Cement and Concrete GB / T 20491-2017". The slag powder is selected from the S95 grade slag powder that meets the requirements of "Granulated Blast Furnace Slag Powder Used in Cement, Mortar and Concrete GB / T18046-2017". The redispersible latex powder is a commercially available latex powder whose active ingredient is vinyl acetate-ethylene copolymer.

[0024] The mix ratio design of a kind of polymer composite flowing dredging silt solidified soil is as follows:

[0025]

Embodiment example 1、 Embodiment example 2

[0026] Implementation case 1, implementation case 2, implementation case 3, implementation case 4, implementation case 5, implementation case 6 are formed by slurry mixing method; implementation case 7 and implementation case 8 are formed by dry powder mixing method.

[0027] Indoor experiment:

[0028] Slurry mixing method molding: weigh the corresponding quality cement, steel slag powder, slag powder, sodium sulfate, and dispersible latex powder according to the mixing ratio shown in the above table, and mix them evenly to obtain a ready-mixed curing agent. Add mud mixing water to the dredged sludge to adjust to the target water content, and stir evenly to obtain fluid dredging sludge; add the pre-mixed curing agent to the curing agent and mix water to prepare the curing agent slurry, and stir the curing agent slurry for 10 minutes, then mix with the flowing dredging The silt was mixed and stirred for 5 minutes to obtain a fluid dredged silt solidified soil. The slump test ...

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Abstract

The invention relates to a formula and a preparation method of polymer composite flow type dredged sludge solidified soil. The formula of the polymer composite flow type dredged sludge solidified soilcomprises the following components in percentage by mass: 80%-97% of dredged sludge; 2%-10% of cement; 1.0%-8.0% of steel slag powder; 1.2-5.6% of slag powder; 0.01%-0.05% of sodium sulfate, and 0.03%-0.40% of redispersible latex powder; and 0.02%-0.30% of sodium carboxymethyl cellulose; The flow type dredged silt solidified soil prepared by the method has the characteristics of high strength, high construction efficiency, good durability and low cost, and can be applied to road engineering, fill engineering, dike engineering and other engineering.

Description

technical field [0001] The invention relates to a dredging silt-solidified soil formula, in particular to a polymer composite flow-type dredged silt-solidified soil formula and a preparation method thereof, belonging to the technical field of engineering material preparation. Background technique [0002] Dredged silt is the waste produced by dredging and widening of river channels and dredging of canals and lakes. In recent years, with the development of water control and quality improvement in my country, its output and reserves have increased year by year. Most of the dredged silt in our country is produced by cutter suction dredging, with a very high water content and a flow state. High water content is the main reason for the poor engineering properties of dredged silt. Now water reduction treatment methods are often used to improve its engineering properties, such as drainage consolidation, natural drying, mechanical dehydration, heat treatment, chemical curing and oth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B28/08C04B28/00
CPCC04B28/00C04B28/04C04B28/08C04B2201/50C04B18/0418C04B18/142C04B2103/0057C04B24/383C04B22/147
Inventor 闫玉蓉张健黄晓宇许俊宋立王鹏举
Owner 江苏叁山生态环境发展有限公司
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