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Novel carbonized baking-free brick prepared through marine waste silt and preparation method of brick

A technology of burning-free bricks and silt, which is applied in the manufacture of tools, ceramic molding machines, solid waste management, etc., can solve the problems that the compressive strength cannot be less than 8MPa, and it is difficult to meet the industrial application requirements of burning-free and pressure-free silt bricks, so as to achieve energy saving Remarkable effect, reduction of greenhouse effect, effect of shortening brick-making cycle

Active Publication Date: 2017-11-10
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The maximum achievable strength of the unfired and pressure-free silt brick obtained by this method is 6.74MPa. According to the national standard GB11945-1999 "Autoclaved Lime-sand Brick", the average compressive strength of bricks with a strength level of MU10 must also reach 10MPa. The compressive strength should not be less than 8MPa. It is currently difficult for the non-fired and pressure-free silt bricks obtained according to the above preparation method to meet the requirements of industrial applications.

Method used

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  • Novel carbonized baking-free brick prepared through marine waste silt and preparation method of brick

Examples

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Effect test

Embodiment 1

[0041] The present invention provides a method for preparing novel carbonized non-burning bricks by using marine waste silt, comprising the following steps:

[0042] (1) Pretreatment: filter the waste marine silt to remove large-grained stones, aquatic plants and other debris in the silt, and then centrifugally dehydrate the filtered silt to reduce the moisture content to 45-75%;

[0043] (2) Mixing and stirring: put 30 parts of waste sludge (excluding the dry weight of water), 10 parts of quicklime, 5 parts of activated magnesium oxide, 10 parts of slag, 30 parts of fly ash, and 15 parts of sand into the Mix and stir in the mixer for 5 minutes to ensure that the mixture is uniform;

[0044] (3) Compression forming: the mixture obtained in step (2) is put into a mould, and it is compressed and formed under a pressure of 20-35MPa by a hydraulic automatic forming machine to obtain adobe;

[0045] (4) Curing: send the adobe made in step (3) to a high-pressure steam engine for 10...

Embodiment 2

[0050] In Example 2, a method for preparing a new type of carbonized unburned brick by using marine waste sludge is the same as the preparation method in Example 1.

[0051] Wherein, the parts by weight of each raw material in step (2) are: 60 parts of waste sludge (dry weight excluding moisture), 5 parts of quicklime, 5 parts of slag, 20 parts of fly ash, 5 parts of sand, and 1 part of water glass , 2 parts of sodium hydroxide, 2 parts of powdered calcium formate.

[0052] The new carbonized burnt-free brick obtained in Example 2 was tested, and its strength value was 35MPa, and its durability was good, which could effectively replace the existing solid clay brick.

Embodiment 3

[0054] In Example 3, a method for preparing a novel carbonized non-burning brick by using marine waste sludge is the same as the preparation method in Example 1.

[0055] Wherein, the parts by weight of each raw material in the step (2) are respectively: 40 parts of waste sludge, 5 parts of cement, 5 parts of quicklime, 5 parts of active magnesium oxide, 5 parts of slag, 30 parts of fly ash, 7 parts of sand, water glass 1 part, 1 part sodium hydroxide, 1 part powdered calcium formate.

[0056] The new carbonized unburned brick obtained in Example 3 was tested, and its strength value was 25MPa, and its durability was good, which can effectively replace the existing solid clay brick.

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Abstract

The invention provides a method for preparing a novel carbonized baking-free brick prepared through marine waste silt. The method comprises the steps that a curing agent, a carbonization accelerator, excitant and an early strength agent are added in the marine waste silt, and a green brick is prepared; the prepared green brick is delivered into a high pressure steamer to be subjected to steam curing, and the green brick is taken out to be put in the air to be subjected to natural curing; the green brick obtained after natural curing is conducted is put in a carbonation tank with the temperature ranging from 20 DEG C to 40 DEG C to be carbonized, and the carbonized baking-free brick is obtained. The novel carbonized baking-free brick has the significant advantages of being high in degree of automation, stable in product performance, good in mechanical property, low in cost, high in yield, friendly to environment and the like, the novel carbonized baking-free brick can completely or partially replace a traditional solid clay brick, and a wide market prospect is achieved.

Description

technical field [0001] The invention belongs to the technical fields of environmental engineering, geotechnical engineering and building materials, and in particular relates to a novel carbonized burn-free brick prepared by using marine waste silt and a preparation method thereof. Background technique [0002] The construction and maintenance of port projects in coastal areas will produce a large amount of waste sludge with high moisture content. The traditional land reclamation, ocean dumping and other treatment methods have a series of problems such as large area occupation, long time consumption, high cost and serious pollution. Therefore, under the concept of sustainable development, how to deal with waste sludge in a reasonable, environmentally friendly and effective way has important practical significance for building a resource-saving and environment-friendly society. [0003] At present, the traditional solid clay brick is the most commonly used in construction proj...

Claims

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Application Information

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IPC IPC(8): C04B28/12C04B18/04C04B40/02B28B3/02B28B11/24
CPCB28B3/02B28B11/24C04B18/0436C04B28/12C04B40/0236C04B2201/50C04B22/066C04B18/141C04B18/08C04B14/06C04B7/243C04B7/14C04B12/04C04B22/06C04B24/04Y02W30/91
Inventor 王东星王宏伟肖杰
Owner WUHAN UNIV
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