Baking-free ecological brick made of waste subway engineering mud and making method of baking-free ecological brick

A technology of discarded mud and ecological bricks, applied in the field of civil engineering, can solve problems such as high moisture content and unfired bricks that cannot meet the use standards

Active Publication Date: 2019-08-30
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present application provides a non-burning ecological brick prepared from waste mud of subway engineering and its preparation method, which is used to solve the problem in the prior art that the non-burning brick produced by the waste mud of subway engineering cannot meet the use standard due to the high water content. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take the following formula ratio raw materials according to the proportion:

[0033] 60 parts of waste mud from subway engineering, 13 parts of dehydrating agent, 25 parts of potassium dihydrogen phosphate solution, and 2 parts of borax; wherein, the dehydrating agent includes the following components by weight: 10 parts of perburned magnesium oxide, 2.8 parts of desulfurized fly ash, 0.2 parts of polyacrylamide.

[0034] According to the preparation method of preparing unfired ecological bricks from the waste mud of the subway project, the unfired ecological bricks were prepared:

[0035] 1) Add the dehydrating agent to the waste mud of the subway project, and mix it uniformly to prepare the mixture A;

[0036] 2) Add potassium dihydrogen phosphate aqueous solution and borax to the mixture A obtained in step 1), and mix uniformly to prepare mixture B, and the moisture content of the mixture B is 25%;

[0037] 3) Take the mixture B obtained in step 2), and use a brick...

Embodiment 2

[0046]Take the following formula ratio raw materials according to the proportion:

[0047] 67.5 parts of waste mud from subway engineering, 20 parts of dehydrating agent, 12 parts of potassium dihydrogen phosphate solution, and 0.5 part of borax; wherein, the dehydrating agent includes the following components by weight: 9.7 parts of overburned magnesium oxide, 10 parts of desulfurized fly ash , 0.3 parts of polyacrylamide.

[0048] According to the preparation method of preparing unfired ecological bricks from the waste mud of the subway project, the unfired ecological bricks were prepared:

[0049] 1) Add the dehydrating agent to the waste mud of the subway project, and mix it uniformly to prepare the mixture A;

[0050] 2) adding an aqueous solution of potassium dihydrogen phosphate and borax to the mixture A obtained in step 1), and mixing uniformly to prepare a mixture B, and the moisture content of the mixture B is 20%;

[0051] 3) Take the mixture B obtained in step 2...

Embodiment 3

[0060] Take the following formula ratio raw materials according to the proportion:

[0061] 80 parts of waste mud from subway engineering, 7.5 parts of dehydrating agent, 12 parts of potassium dihydrogen phosphate solution, and 0.5 part of borax; wherein, the dehydrating agent includes the following components by weight: 6 parts of overburned magnesium oxide, 1 part of desulfurized fly ash , 0.5 parts of polyacrylamide.

[0062] According to the preparation method of preparing unfired ecological bricks from the waste mud of the subway project, the unfired ecological bricks were prepared:

[0063] 1) Add the dehydrating agent to the waste mud of the subway project, and mix it uniformly to prepare the mixture A;

[0064] 2) Add potassium dihydrogen phosphate aqueous solution and borax to the mixture A obtained in step 1), and mix uniformly to prepare mixture B, and the moisture content of the mixture B is 30%;

[0065] 3) Take the mixture B obtained in step 2), and use a brick...

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Abstract

The embodiment of the invention provides a baking-free ecological brick made of waste subway engineering mud and a making method of the baking-free ecological brick and aims to solve the problem thatin the prior art a baking-free brick made of waste subway engineering mud cannot meet use standards because of a too high water content. The baking-free ecological brick comprises the following components in parts by weight: 60-80 parts of waste subway engineering mud, 7.5-20 parts of a dewatering agent, 12-25 parts of a monopotassium phosphate solution and 0.5-2.0 parts of borox. The making method comprises the following steps: putting a dewatering agent with overburnt magnesium oxide into the waste subway engineering mud, and carrying out uniform stirring so as to obtain a mixed material A;putting a monopotassium phosphate solution and borox into the mixed material A, and carrying out uniform mixing so as to obtain a mixed material B, wherein the water content of the mixed material B is22-30%; carrying out coextrusion on the mixed material B so as to obtain a primary brick block; and maintaining the primary brick block for days in an environment of which the temperature is 18-22 DEG C and the RH (relative humidity) is greater than or equal to 65%, so as to obtain the baking-free ecological brick.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a burn-free ecological brick prepared from waste mud in subway engineering and a preparation method thereof. Background technique [0002] A large amount of waste mud produced during the construction of urban subway projects is currently mainly transported by mud tankers and discharged to designated places for stacking or disposal, causing pollution to the surrounding environment and is not conducive to the ecological development of a green city. [0003] Using fly ash, coal cinder, coal gangue, tailings slag, chemical slag or natural sand, sea mud, etc. (one or more of the above raw materials) as the main raw materials, a new type of wall material manufactured without high-temperature calcination is called It is unburned brick. At present, most of the existing burn-free bricks are prepared with waste sludge. For example, the patent application number CN201810391111 discloses a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/34C04B18/16
CPCC04B28/34C04B2201/50C04B14/304C04B18/16C04B18/08C04B22/0013C04B24/2652Y02W30/91
Inventor 温小栋张盛楠冯蕾蔡伟梁艳鸿孙华强
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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