Method for preparing artificial ecological aggregate by using inland sludge and near-shore high-sand mud

A high-sand mud and silt technology, applied in the field of materials, can solve the problems of stone resource consumption and other problems, and achieve the effect of simple preparation process, favorable for popularization and application, and good stability

Active Publication Date: 2014-06-25
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the aggregates in the planting concrete slope protection technology researched and applied at present are

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Take silt from inland rivers, lakes, reservoirs and nearshore high-sand mud to remove large particles larger than 2mm in size, and dry the silt and high-sand mud to a moisture content of 5%;

[0021] (2) Take 25 parts of silt, 25 parts of high sand mud, 18 parts of 42.5 grade Portland cement, 18 parts of fly ash, 5 parts of steel slag, 5 parts of silica fume, 2 parts of quicklime, 1.4 parts of activator, early strength agent 0.6 parts and 5 parts of water, put them in a mixer and mix well. Wherein, the activator includes the following components by weight: 50 parts of gypsum, 15 parts of NaOH, water glass (NaSiO 3 ) 15 copies, Al 2 (SO 4 ) 3 20 parts, 7 parts of Glauber's salt, the early strength agent is Na with a mass ratio of 50:50 2 SO 4 And FeSO 4 mixture.

[0022] (3). Input the uniform mixture of step (2) into the pelletizer to pelletize into pellets (spray an appropriate amount of atomized water during pelletization).

[0023] (4) Place the finished ball in step (...

Embodiment 2

[0025] (1) Take silt from inland rivers, lakes, reservoirs and nearshore high-sand mud, filter to remove large particles larger than 2mm, and dry the silt and high-sand mud naturally to a moisture content of 8 parts;

[0026] (2) Take 28 parts of silt, 28 parts of high sand mud, 17 parts of 42.5 grade Portland cement, 17 parts of fly ash, 5 parts of steel slag, 1.5 parts of silica fume, 2 parts of quicklime, 1.2 parts of activator, early strength agent 0.3 parts and 10 parts of water, put them in a mixer and mix well. Wherein, the activator includes the following components by weight: 50 parts of gypsum, 15 parts of NaOH, water glass (NaSiO 3 ) 15 copies, Al 2 (SO 4 ) 3 25 parts, 8 parts of Glauber's salt, the early strength agent is Na with a mass ratio of 50:50 2 SO 4 And FeSO 4 mixture.

[0027] (3). Input the uniform mixture of step (2) into the pelletizer to pelletize into pellets (spray an appropriate amount of atomized water during pelletization).

[0028] (4) Place the finis...

Embodiment 3

[0030] (1) Take silt from inland rivers, lakes, reservoirs and nearshore high-sand mud, filter to remove large particles larger than 2mm, and dry the silt and high-sand mud naturally to a moisture content of 8 parts;

[0031] (2) Take 24 parts of silt, 24 parts of high sand mud, 19 parts of 42.5-grade Portland cement, 17 parts of fly ash, 7 parts of steel slag, 2 parts of silica fume, 5 parts of quicklime, 1.6 parts of activator, early strength agent 0.4 part and 1 part water, put them in a mixer and mix well. Wherein, the activator includes the following components by weight: 50 parts of gypsum, 15 parts of NaOH, water glass (NaSiO 3 ) 15 copies, Al 2 (SO 4 ) 3 25 parts, 8 parts of Glauber's salt, the early strength agent is Na with a mass ratio of 50:50 2 SO 4 And FeSO 4 mixture.

[0032] (3). Input the uniform mixture of step (2) into the pelletizer to pelletize into pellets (spray an appropriate amount of atomized water during pelletization).

[0033] (4) Place the finished ball...

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PUM

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Abstract

The invention provides a method for preparing artificial ecological aggregate by using inland sludge and near-shore high-sand mud. The method comprises the following steps: filtering sludge and high-sand mud to remove large particles with particle diameter being greater than 2 millimeters; naturally withering the filtered sludge and high-sand mud; uniformly mixing the sludge, the high-sand mud, cement, coal ash, quicklime, steel slag, silicon ash, an activator, an early strength agent and water; pelletizing the mixture into balls in a pelletizer; naturally curing finished balls, spraying water for curing, spraying a waterproof coating or an alkaline activation curing agent, and curing naturally. The ecological aggregate which can be applied to planting concrete is mainly prepared from sludge and near-shore high-sand mud, so that natural gravels and cobbles in planting cement are replaced completely or partially, sludge is treated effectively, and environmental problems caused by sludge are solved. Moreover, sludge is turned into a usable resource to be utilized effectively, so that the method has good economical value and social value.

Description

Technical field [0001] The invention belongs to the field of materials, and particularly relates to a method for preparing artificial ecological aggregate by using inland silt and nearshore high sand mud. Background technique [0002] Silt is a flocculent and honeycomb structure formed by the deposition of fine particles such as clay minerals in slow flowing water environments such as oceans or lakes under the action of inter-particle electrostatic force and molecular gravity. At the beginning of the development of industry and agriculture, our country did not pay enough attention to environmental protection. With the further development of industry and agriculture, a large amount of industrial, agricultural and domestic sewage was directly discharged into rivers and lakes without treatment, resulting in damage to the water environment. The pollutants in the sludge settle, and the pollutant content in the sludge increases, making the sludge seriously polluted. The polluted sludg...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B18/021
Inventor 祝建中史海波陈冠寰胡志强崔延松
Owner HOHAI UNIV
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