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Riverway sludge-based engineering soil and preparation method thereof

A technology of river silt and engineering soil, which is applied in the field of river silt-based engineering soil and its preparation, can solve the problems that engineering soil cannot meet the engineering soil mechanical index requirements, high drying cost, high production cost, etc., and achieve the reduction of solid waste landfill and Outbound processing capacity, low cost of raw materials, and the effect of improving compaction and compressive strength

Pending Publication Date: 2021-02-12
CHINA CONSTR THIRD BUREAU GREEN IND INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a kind of river channel silt-based engineering soil for the problems of high cost of deep drying of silt as a means of resource utilization of silt, direct use of engineering soil that cannot meet the mechanical index requirements of engineering soil, large amount of cement, and high production cost. It is prepared from river silt, construction waste slag and fly ash as the main raw materials. It has the advantages of low disposal cost, simple preparation method and convenient operation, and has important economic and environmental benefits.

Method used

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  • Riverway sludge-based engineering soil and preparation method thereof
  • Riverway sludge-based engineering soil and preparation method thereof
  • Riverway sludge-based engineering soil and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] A kind of river course silt-based engineering soil, its preparation method comprises the steps:

[0032] 1) The raw materials are weighed, the components and their dosage conditions are: 800kg of river silt (dried for 4 days, moisture content 28%), 100kg of construction waste slag, 50kg of fly ash, 50kg of cement, and a water-cement ratio of 0.2;

[0033] 2) Place the weighed river silt particles and construction waste slag in the mixing bin, and after stirring for 60 seconds, add fly ash in the stirring state, and stir for 30 seconds; then add cement in the stirring state, and stir for 30 seconds to obtain the mixture ;

[0034] 3) The mixture obtained in step 2) is discharged out of the mixer, and placed at room temperature for 3 to 7 days, and then the river channel silt-based engineering soil can be obtained by rolling.

Embodiment 2

[0036] A kind of river course silt-based engineering soil, its preparation method comprises the steps:

[0037] 1) The raw materials are weighed, each component and its dosage conditions are: 700kg of river silt (4 days in the air, moisture content 28%), 230kg of construction waste slag, 50kg of fly ash, 20kg of cement, and a water-cement ratio of 0.15;

[0038] 2) Place the weighed river silt particles and construction waste slag in the mixing bin, and after stirring for 60 seconds, add fly ash in the stirring state, and stir for 30 seconds; then add cement in the stirring state, and stir for 30 seconds to obtain the mixture ;

[0039] 3) The mixture obtained in step 2) is discharged out of the mixer, and placed at room temperature for 3 to 7 days, and then the river channel silt-based engineering soil can be obtained by rolling.

Embodiment 3

[0041] A kind of river course silt-based engineering soil, its preparation method comprises the steps:

[0042] 1) The raw materials are weighed, the components and their dosage conditions are: 600kg of river mud (drying for 3 days, moisture content 35%), 300kg of construction waste slag, 50kg of fly ash, 50kg of cement, and a water-cement ratio of 0.15;

[0043]2) Place the weighed river silt particles and construction waste slag in the mixing bin, and after stirring for 60 seconds, add fly ash in the stirring state, and stir for 30 seconds; then add cement in the stirring state, and stir for 30 seconds to obtain the mixture ;

[0044] 3) The mixture obtained in step 2) is discharged out of the mixer, and placed at room temperature for 3 to 7 days, and then the river channel silt-based engineering soil can be obtained by rolling.

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Abstract

The invention discloses riverway sludge-based engineering soil, which is prepared from the following components in percentage by weight: 53-83% of riverway sludge, 10-30% of construction waste powderslag, 5-10% of fly ash and 2-7% of cement, wherein the water cement ratio is controlled to be 0.1-0.5. According to the invention, riverway dredging silt is used as a main raw material, construction waste powder slag is used as fine aggregate, and a small amount of cementing materials such as fly ash and cement are used as auxiliary materials, so that the mechanical property and the stability of an obtained consolidation system can be effectively ensured so as to form riverway silt-based engineering soil meeting the requirements of soil for road filling, bulk disposal and resource utilizationof river dredging silt can be achieved, land is saved, pollution to the environment is avoided, and important economic and environmental benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of civil engineering materials and solid waste, and in particular relates to a river channel silt-based engineering soil and a preparation method thereof. Background technique [0002] At present, industrial solid waste such as alkali slag, fly ash, and coal gangue is used as raw materials to replace traditional engineering soil for road paving engineering soil, while river silt is rarely used in engineering soil preparation. The dredging of the river channel leads to a large amount of silt accumulation, occupying a large amount of land and causing environmental pollution. my country's dredging sludge disposal technology is still dominated by landfill and composting. With the development of ecological civilization construction, harmless treatment and resource utilization of sludge will be the inevitable choice of sludge disposal technology in the future. The resource disposal of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
CPCC04B28/00C04B2111/0075C04B2201/50C04B18/0418C04B18/08C04B18/167
Inventor 黄文海闵红平石稳民彭冠平聂怀军江东邱震寰秦雄陈安明何媛王民珉张文
Owner CHINA CONSTR THIRD BUREAU GREEN IND INVESTMENT CO LTD
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