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Method of preparing baking-free brick with dredge sediment aggregate

A technology for dredging sediment and unburned bricks, which is applied in the dredging industry and the field of building materials, can solve the problems such as patent publications that have not yet been found, and achieve the effects of simple maintenance steps, reduced production energy consumption, and reduced production costs

Active Publication Date: 2015-12-09
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Through the search, no patent publications related to the patent application of the present invention have been found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A method for preparing unfired bricks by using dredged bottom mud aggregates, comprising the following steps:

[0040] 1. Screening of dredged bottom mud aggregate: use a screening machine to screen the dredged bottom mud ceramsite, the screening particle size range is 5-10mm, the cylinder compressive strength is 2.75MPa, and the water absorption rate is 10.2% The ceramsite is used as the dredged bottom clay aggregate;

[0041] 2. Pretreatment of raw materials: crush cement, quicklime, gypsum and fly ash through a pulverizer to 100 mesh and moisture content of 10%;

[0042] 3. Ingredients: Mix and stir the pretreated cement, quicklime, gypsum and fly ash to obtain a dry mixture, weigh the dredged bottom mud aggregate, and the ratio of the dry mixture to the dredged bottom mud aggregate is: Calculated according to the mass percentage of each raw material, 7% of cement, 5% of quicklime, 1.5% of gypsum, 21.5% of fly ash, and 65% of dredged sediment aggregate;

[0043] Wh...

Embodiment 2

[0050] A method for preparing unfired bricks by using dredged bottom mud aggregates, comprising the following steps:

[0051] 1. Screening of dredged bottom mud aggregate: use a screening machine to screen the dredged bottom mud ceramsite, the screening particle size range is 4-9mm, the cylinder compressive strength is 2.88MPa, and the water absorption rate is 9.8% The ceramsite is used as the dredged bottom clay aggregate;

[0052] 2. Pretreatment of raw materials: crush cement, quicklime, gypsum and fly ash to 150 mesh and moisture content of 9.5% through a pulverizer;

[0053] 3. Ingredients: Mix and stir the pretreated cement, quicklime, gypsum and fly ash to obtain a dry mixture, weigh the dredged bottom mud aggregate, and the ratio of the dry mixture to the dredged bottom mud aggregate is: Calculated according to the mass percentage of each raw material, 16% of cement, 5% of quicklime, 1.5% of gypsum, 23.5% of fly ash, and 54% of dredged sediment aggregate;

[0054] Wh...

Embodiment 3

[0061] A method for preparing unfired bricks by using dredged bottom mud aggregates, comprising the following steps:

[0062] 1. Screening of dredged bottom mud aggregate: Use a screening machine to screen the dredged bottom mud ceramsite. The screening particle size range is 2-5mm, the cylinder compressive strength is 5.15MPa, and the water absorption rate is 9.5%. The ceramsite is used as the dredged bottom mud aggregate;

[0063] 2. Pretreatment of raw materials: crush cement, quicklime, gypsum and fly ash to 200 mesh and moisture content of 9.3% through a pulverizer;

[0064] 3. Ingredients: Mix and stir the pretreated cement, quicklime, gypsum and fly ash to obtain a dry mixture, weigh the dredged bottom mud aggregate, and the ratio of the dry mixture to the dredged bottom mud aggregate is: Calculated according to the mass percentage of each raw material, 19% of cement, 5% of quicklime, 2.5% of gypsum, 26.5% of fly ash, and 47% of dredged sediment aggregate;

[0065] Wh...

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Abstract

The invention relates to a method of preparing baking-free brick with a dredge sediment aggregate, which includes the steps of (1) sieving the dredge sediment aggregate; (2) smashing cement, quick lime, gypsum and fly ash in a pulverizer; (3) material blending: mixing and stirring the cement, the quick lime, the gypsum and the fly ash to obtain a dry-mixed material, weighing the dredge sediment aggregate, wherein the dry-mixed material comprises, by mass, 5-20 parts of the cement, 3-13 parts of the quick lime, 1-10 parts of the gypsum and 15-30 parts of the fly ash, and the dredge sediment aggregate accounts for 45-70 parts by weight; (4) adding water and stirring the mixture; (5) aging the mixture material; (6) press-moulding the mixture in a brick pressing machine; (7) performing product maintenance to obtain the baking-free brick. The method can consume the dredge sediment in a large quantity, thereby achieving resource recycling. The method can satisfy requirement in dredge industry and is low in production cost due to the baking-free process. The prepared baking-free brick is low in cost, is excellent in performances, can develop a utilization approach of recycling the dredge sediment resource, and satisfies the requirement of building material market.

Description

technical field [0001] The invention belongs to the technical field of dredging industry and building materials, in particular to a method for preparing non-burning bricks by using dredged bottom mud aggregate. Background technique [0002] Dredged sediment is produced by the treatment of water body sediment through dredging engineering. In recent years, due to the rapid development of my country's dredging industry, a large amount of dredged sediment is produced every year. However, due to the performance degradation of dredged sediment, its resource utilization is restricted. At present, the sintering method is mostly used in the resource utilization of dredged sediment at home and abroad. The sintering method is used to make bricks by desanding the dredged bottom mud, then aging evenly, and then directly mixing with other raw materials, and then sintering to obtain sintered bricks. Although the sintered bricks prepared by the sintering method have a dense structure and...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/02
Inventor 吴燕周颜贾瑞于浩
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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