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A kind of aluminum-containing tober mullite autoclaved slag solid brick and its rapid preparation method

A mullite and solid brick technology, which is applied in the field of aluminum-containing tober mullite autoclaved slag solid bricks and its rapid preparation, can solve the problems of low quality, long production cycle, and poor durability of recycled bricks from construction waste. , to achieve good appearance, improve utilization rate and ensure strength

Active Publication Date: 2019-06-21
深圳市航天新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the problems existing in the prior art, the purpose of the present invention is to provide an aluminum-containing tobermullite autoclaved solid brick capable of utilizing a large amount of slag and its rapid preparation method, so as to overcome the problem of construction waste regenerated bricks in the prior art. The problems of low quality, low strength, poor durability and long production cycle

Method used

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  • A kind of aluminum-containing tober mullite autoclaved slag solid brick and its rapid preparation method
  • A kind of aluminum-containing tober mullite autoclaved slag solid brick and its rapid preparation method
  • A kind of aluminum-containing tober mullite autoclaved slag solid brick and its rapid preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] An aluminum-containing tobmullite autoclaved muck solid brick is prepared by weight percentage of the following components: muck 78.95%, cement 18%, sodium sulfate 3%, and nano titanium dioxide 0.05%. The cement is China Resources PO42.5 cement with a 28d strength of 48MPa. The titanium dioxide is hydrophilic, gold-red type, with a size of 40 nm.

[0036] A solid brick with aluminum-containing toble mullite autoclaved muck and a rapid preparation method thereof, including the following steps:

[0037] (1) Raw material pretreatment: the residual sludge of the muck is dried naturally or sun-dried, and the moisture content is 7.2%;

[0038] (2) Crushing and screening: The slag is crushed by a jaw crusher and passed through a site sieve with an aperture of 10mm. The slag with a particle size of less than 10mm is selected;

[0039] (3) Ingredients: weigh the slag, cement and admixtures according to the dry weight, add a part of water, and stir evenly. The moisture content of the mi...

Embodiment 2

[0049] An autoclaved solid brick with aluminum-containing toble mullite residue is prepared by weight percentage of the following components: 80.95% of residue, 15% of cement, 4% of sodium sulfate, and 0.05% of nanometer zirconium dioxide. The cement is China Resources PO42.5 cement with a 28d strength of 48MPa. The zirconium dioxide is hydrophilic and has a size of 40 nm.

[0050] A solid brick with aluminum-containing toble mullite autoclaved muck and a rapid preparation method thereof, including the following steps:

[0051] (1) Raw material pretreatment: the residual sludge of the muck is naturally dried or sun-dried, and the moisture content is 6.7%;

[0052] (2) Crushing and screening: The slag is crushed by a jaw crusher and passed through a site sieve with an aperture of 10mm. The slag with a particle size of less than 10mm is selected;

[0053] (3) Ingredients: weigh the slag, cement and admixtures according to the dry weight, add a part of water, and stir evenly. The moistu...

Embodiment 3

[0058] The difference between an aluminum-containing tobmullite residue autoclaved solid brick in this embodiment and embodiment 1: It is prepared by weight percentage from the following components: residue 79%, cement 18%, sodium sulfate 3 %. The preparation method and process are the same as in Example 1.

[0059] The performance of the finished product is tested according to GB11945-1999 "Autoclaved Lime-Sand Brick", and all indicators are qualified and reach the MU20 level requirement. The compressive strength is 23.5MPa, the flexural strength is 4.3MPa, the compressive strength after freezing is 21.8MPa, and the mass loss after freezing is 0.4%. The compressive strength and frost resistance can still meet the requirements of MU20 level, but all indexes are worse than the examples. 1.

[0060] Crush and grind the muck bricks into powder, pass the 80μm standard sieve for X-ray diffraction analysis, delete the SiO in the XRD spectrum 2 And CaCO 3 The strongest peak and the seco...

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Abstract

The invention discloses a method for producing an autoclaved solid brick taking muck as a raw material and containing aluminous tobermorite and a production technology. The solid brick is prepared from components in percentage by mass as follows: 70%-85% of muck, 12%-20% of cement, 2%-5% of sodium sulfate and 0-0.05% of an additive, and the sum of the mass percentages of all the components is 100%. A preparation method comprises the steps as follows: firstly, the muck is dried, ball-milled and sieved, muck with the particle size smaller than 10 mm is taken as the raw material, then, all the components are weighed and mixed with part of water, uniform mixing is performed, the obtained mixture is conveyed to a forming shop to be pressed, a standard green brick is obtained and subjected to autoclaved curing, and a finished product is obtained. The treatment amount of muck and residual mud is large, the cost is low, the preparation cycle is short, and batch resource utilization of construction waste and the low-carbon city development goal are achieved. Aluminum-containing minerals in the muck react to produce aluminous tobermorite, the good intensity and durability of the green brick are guaranteed, and the product has the good appearance and few defects and meets the requirement of Autoclaved Sand-lime Brick (GB11945-1999) MU20 level performance.

Description

Technical field [0001] The invention belongs to the field of building materials, and in particular relates to a solid brick containing aluminum toblemullite autoclaved muck and a rapid preparation method thereof. One of the main raw materials in the present invention is a large amount of piled up in the city, and is difficult to handle and utilize the residual sludge of construction residue, which relates to the field of solid waste disposal. Background technique [0002] Construction waste is a by-product of the city. Urban development and residents' lives generate a large amount of construction waste, and the residual sludge is an important one. Before 2000, many cities had a wide distribution of land to be built and low-lying areas. The land leveling project of construction projects was mainly "shortage", and the production scale of the residue of the slag was relatively limited. The foundation was filled and buried in place. It can be basically completed spontaneously by soc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B18/04C04B20/04
CPCY02W30/91
Inventor 曹海琳翁履谦李绍彬杨旭李国学郭悦
Owner 深圳市航天新材科技有限公司
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