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Building material prepared from dredged sand and preparation method thereof

A technology for building materials and raw materials, which is applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of lack of good treatment methods for dredged sand, restricted application, and high compressive strength, and improve environmental protection and energy saving. effect, realization of waste utilization, effect of increasing tensile strength

Inactive Publication Date: 2010-09-22
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, building materials such as crushed stones, bricks (including lime-sand bricks), blocks, and plates commonly used in construction have high compressive strength and low tensile strength, and the tensile strength is only about 10% of the compressive strength, resulting in The advantages of its strong pressure resistance cannot be fully utilized, which restricts its application
[0003] On the other hand, a large amount of dredged sand is produced in the coastal area every year due to port construction and waterway dredging. At present, there is no good treatment method for these dredged sand, and most of them are thrown out.
The cost of throwing outside is relatively high, about 8-15 yuan per square meter, and it will generate a lot of carbon emissions, causing serious environmental pollution
For many coastal and mountainous areas, if the building materials such as crushed stones, bricks, and blocks are transported from other places, the distance is long, the cost is high, and the economy is poor, and long-distance transport will generate a lot of carbon emissions. Pollution of the environment, poor social benefits

Method used

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  • Building material prepared from dredged sand and preparation method thereof
  • Building material prepared from dredged sand and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] According to the weight ratio, with 85Kg dredging sand, 7Kg quicklime, 3Kg fly ash, 4Kg oyster shell, 1Kg carbon fiber, 0.2Kg plasticizer, 0.1Kg dechlorination agent, 2Kg cement as raw materials, crush each raw material to 190 mesh, Then mix and stir.

[0037] Put the stirred raw materials into the brick forming mold, apply a forming pressure of 65 MPa, and vibrate forming at the vibration frequency of 2 Hz.

[0038] The formed product is autoclaved and cured under a pressure of 0.6 MPa to obtain dredged sand brick building materials. After measurement, the compressive strength of the dredged sand brick is 52MPa, and the tensile strength is 20MPa.

Embodiment 2

[0040] According to the weight ratio, use 60Kg dredging sand, 7Kg quicklime, 9Kg fly ash, 3Kg scallop shell, 1.2Kg glass fiber, 0.3Kg antirust agent, 0.1Kg chlorine remover, 2Kg cement as raw materials, and crush each raw material to 200 mesh, then mix and stir.

[0041] The stirred raw materials are put into a plate forming mold, and a forming pressure of 50 MPa is applied while forming by vibration, and the vibration frequency is 2 Hz.

[0042] The molded product is autoclaved and cured under a pressure of 0.3 MPa to obtain a dredged sand board building material. After measurement, the compressive strength of the dredged sand board is 38MPa, and the tensile strength is 16MPa.

Embodiment 3

[0044] According to the weight ratio, use 75Kg dredging sand, 5Kg quicklime, 2Kg fly ash, 3Kg oyster shell, 2Kg ceramic fiber, 0.3Kg steam culture agent, 0.1Kg dechlorination agent as raw materials, crush each raw material to 200 mesh, and then mix Stir.

[0045] Put the stirred raw materials into the block forming mold, apply a forming pressure of 50 MPa, and vibrate forming at the vibration frequency of 1.2 Hz.

[0046] The molded product is autoclaved and cured under a pressure of 0.5 MPa to obtain a dredged sand block building material. After measurement, the compressive strength of the dredged sand block is 40MPa, and the tensile strength is 15MPa.

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Abstract

The invention discloses a building material prepared from dredged sand and a preparation method thereof. The building material is prepared from the following raw materials in part by weight: 60 to 85 parts of the dredged sand, 5 to 7 parts of quicklime, 2 to 9 parts of fly ash, 2 to 4 parts of shell, 0.2 to 2.2 parts of inorganic fiber and 0.1 to 0.4 part of performance modifier. The building material is prepared by mixing the wastes in the sea and the river, such as the dredging sludge, the shell and the like, and the inorganic fiber in a specific weight ratio and has the advantages of higher tensile strength, achievement of waste utilization and relatively low raw material cost.

Description

technical field [0001] The invention relates to a building material, in particular to a building material prepared from dredged sand and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] At present, building materials such as crushed stones, bricks (including lime-sand bricks), blocks, and plates commonly used in construction have high compressive strength and low tensile strength, and the tensile strength is only about 10% of the compressive strength, resulting in The advantage of its strong ability to resist pressure cannot be fully utilized, which restricts its application. [0003] On the other hand, a large amount of dredged sand is produced every year due to port construction and waterway dredging in coastal areas. At present, there is no good treatment method for these dredged sands, and most of them are thrown outside. The cost of throwing out is relatively high, about 8-15 yuan per square meter, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/10C04B18/30C04B14/38
CPCC04B28/10C04B2111/2038Y02W30/91C04B7/00C04B14/06C04B14/28C04B14/38C04B18/08C04B40/024C04B40/0259C04B2103/0068C04B2103/10C04B2103/30C04B2103/302C04B2103/61
Inventor 焦双健魏巍周洋肖承楠
Owner OCEAN UNIV OF CHINA
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