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Preparation and use of sludge-stalk fibrous composite

A straw fiber and composite material technology, applied in geotechnical engineering, ecological environment, and agricultural fields, can solve the problems of difficulty in adapting to large-scale production, increasing the cost of ecological slope protection, and being unfavorable for vegetation growth, etc., to achieve reinforcement of slopes and greening environment, The construction method is simple and the progress is fast

Active Publication Date: 2011-07-20
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Portland cement makes the soil acidic, which is not conducive to the growth of vegetation, and the addition of organic matter, humus, nitrogen, phosphorus and potassium required for vegetation growth increases the cost of ecological slope protection. Overall, it is immature, slow in progress, high in cost, and difficult to adapt to the scale chemical production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0033] ①Sludge modification, take 1000kg of municipal sludge with a water content of 85%, mix it with 120kg of desulfurization ash and 10kg of polyacrylamide, and stir it evenly for 30min to 45min (rotation speed: 17r / min) to form modified sludge ;

[0034] ②Mix 1130kg of modified sludge and 45.2kg of straw fiber, and add 5.876kg of sodium-polyacrylate-polyacrylamide copolymer to form a sludge-straw fiber mixture, in which,

[0035] Straw fiber length is 6mm;

[0036] ③Put the sludge-straw fiber mixture into the mixer and stir evenly for 30min~45min (rotation speed: 17r / min), to form a sludge-fiber micelle mixture (sludge-straw fiber composite material), in which, the mixture The water content is 40%, and the density of the mixed polymer is 1.63g / cm 3 , The pH value of the mixed polymer is 7.

[0037] Sludge-straw fiber composites applied to rocky slopes.

[0038] The specific application method steps are as follows:

[0039] ①Clean up the slope, remove or reinforce the l...

specific Embodiment 2

[0044] ①Sludge modification, take 1000kg of municipal sludge with a moisture content of 85%, mix it with 135kg of steel slag and 9kg of polyacrylamide, and stir it evenly for 30min to 45min (rotation speed: 17r / min) to form modified sludge;

[0045] ②Mix 1144kg of modified sludge and 34.32kg of straw fiber, and add 8.84kg of sodium-polyacrylate-polyacrylamide copolymer to form a sludge-straw fiber mixture, in which,

[0046] Straw fiber length is 9mm;

[0047] ③Put the sludge-straw fiber mixture into the mixer and stir evenly for 30min~45min (rotation speed: 17r / min), to form a sludge-fiber micelle mixture (sludge-straw fiber composite material), in which,

[0048] The water content of the mixed polymer is 40%, and the mixed polymer density is 1.625g / cm 3 , The pH value of the mixed polymer is 7.

[0049] Sludge-straw fiber composites applied to clay slopes.

[0050] The specific application method steps are as follows:

[0051] ①Clean up the slope, remove or reinforce the...

specific Embodiment 3

[0056] ①Sludge modification, take 1000kg of municipal sludge with a moisture content of 85%, mix it with 150kg of desulfurization ash and 8kg of polyacrylamide, and stir it evenly for 30min-45min (rotation speed: 17r / min) to form modified sludge ;

[0057] ②Mix 1158kg of modified sludge and 23.16kg of straw fiber, and add 11.81kg of sodium-polyacrylate-polyacrylamide copolymer to form a sludge-straw fiber mixture, in which,

[0058] Straw fiber length is 15mm;

[0059] ③Put the sludge-straw fiber mixture into the mixer and stir evenly for 30min~45min (rotation speed: 17r / min), to form a sludge-fiber micelle mixture (sludge-straw fiber composite material), in which,

[0060] The water content of the mixed polymer is 40%, and the mixed polymer density is 1.62g / cm 3 , The pH value of the mixed polymer is 7.

[0061] Sludge-straw fiber composites applied to landfill slopes.

[0062] The specific application method steps are as follows:

[0063] ①Clean up the slope, remove or ...

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Abstract

The invention relates to a method for preparing a sludge-straw fibre composite material and application. Municipal sludge, straw fibre and industrial waste slag (desulfurized clinker and steel slag) are used as raw materials to prepare a sludge-fibre micelle copolymer by sludge modification technology and copolymer even stirring technology; the sludge-fibre micelle copolymer is used for ecological protection and restoration of a rock slope, a clay slope and a landfill field slope. The sludge-fibre micelle copolymer prepared by the technology recycles and utilizes sludge and straw fibre which are difficult to process; and compared with various green substrates, the sludge-fibre micelle copolymer does not need to add nitrogen, phosphorus, potassium and organic fertilizer to soil, reutilizeswaste and greatly reduces cost. The straw fibre improves the tensile and flexural mechanical performance of the sludge-fibre micelle copolymer and further achieves the mechanical strength index of the slope protection. Grass seeds are mixed to the copolymer; and the hydrological effect of plant and mechanical reinforcement effect of a plant root system are utilized to effectively circulate moisture and achieve the functions of reinforcing the slope and greening environment.

Description

technical field [0001] The method for ecological slope protection of the sludge-straw fiber composite material of the present invention is generally applicable to the ecological protection and restoration of rock slopes, clay slopes, and landfill slopes, and belongs to the fields of ecological environment, geotechnical engineering, and agriculture. Background technique [0002] With the accelerated pace of construction of urban sewage treatment facilities and the improvement of the centralized sewage treatment rate, the amount of sludge produced by sewage treatment plants has grown rapidly. According to the national "Eleventh Five-Year Plan", my country will increase its daily sewage treatment capacity by 45 million tons, and the centralized treatment rate of urban sewage will reach 70%. One of the environmental problems to be solved. How to carry out harmless treatment and resource utilization technology of municipal sludge is a problem that governments all over the world a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/30C04B18/24C05F7/00
CPCY02A40/20Y02W30/91
Inventor 薛强李先旺盛谦徐正明刘磊赵颖
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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