Process for producing regenerated building waste autoclaved brick

A construction waste and production process technology, applied in the field of regenerated construction waste autoclaved brick production process, can solve the problems of no recycling, environmental impact, large quantity, etc., and achieves low processing cost, reduced waste, and simple process. Effect

Inactive Publication Date: 2013-02-06
FUJIAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, the above research does not involve the recycling of micropowder (below 2 mm) produced in the regeneration process of construction waste, and the micropowder produced in the regeneration process of construction waste accounts for about 50% of the total, and the amount is relatively large. Utilization is a big waste, and it will also have a great impact on the surrounding environment; on the other hand, it does not involve a production process for autoclaved brick

Method used

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  • Process for producing regenerated building waste autoclaved brick
  • Process for producing regenerated building waste autoclaved brick
  • Process for producing regenerated building waste autoclaved brick

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example one, as figure 2 shown:

[0037] 1. Raw material preparation

[0038] 1. Construction waste: The construction waste is transported by dump truck into the factory shed for storage, and after simple pre-homogenization, it is transported by belt to the jaw crusher for coarse crushing. The particle size of the coarse crushing is controlled below 20mm. After wood removal and iron removal with permanent magnetic suspension iron remover, the coarsely crushed products enter the hammer crusher by gravity to be finely crushed to less than 5mm, and then manually remove wood and iron removal with permanent magnetic suspension iron remover, and then store in the silo for use. The composition of the construction waste treated by this step satisfies the SiO 2 Not less than 40%, Al 2 O 3 15-35%, SO 3 Not more than 2%, loss on ignition not more than 12%.

[0039] 2. Quicklime and gypsum: lump quicklime is transported into the factory by dump truck, and poured into quicklime...

Embodiment 2

[0047] Example two, as image 3 shown:

[0048] 1. Raw material preparation

[0049] 1. Construction waste

[0050] The coarsely crushed product enters the hammer crusher by gravity and is finely crushed to below 2.5mm, and the rest are the same as in the above-mentioned embodiment one.

[0051] 2. Quicklime, gypsum

[0052] Wherein, quicklime and gypsum are fed into a ball mill at a ratio of 9:2 for mixing and fine grinding, and the rest are the same as in the first embodiment above.

[0053] 3. Water and additives

[0054] The water is common tap water, and the admixture can be purchased from chemical raw materials or chemical waste. The admixture is a reinforcing agent such as JM-I type (super early strength) concrete high-efficiency reinforcing agent, a plasticizer such as a low-viscosity polycarboxylate superplasticizer, a coagulation regulator such as XPM coagulation regulator, and a diluent such as XHDB001 A mixture of thinners, the reinforcing agent, plasticizer,...

Embodiment 3

[0061] Embodiment three, still refer to image 3 shown:

[0062] 1. Raw material preparation

[0063] 1. Construction waste

[0064] With the above-mentioned embodiment one.

[0065] 2. Quicklime, gypsum

[0066] Wherein, quicklime and gypsum are fed into a ball mill at a mass ratio of 3:1 for mixing and fine grinding, and the rest are the same as in the first embodiment above.

[0067] 3. Water and additives

[0068] The water is common tap water, and the admixture can be purchased from chemical raw materials or chemical waste. The admixture is a reinforcing agent such as a silicone concrete reinforcing agent, a plasticizer such as a construction mortar plasticizer, a coagulation regulator such as an XPM coagulation regulator, and a diluent such as a mixture of XHDB001 type diluents. The reinforcing agent, plasticizer, The amount of coagulation regulator and diluent accounts for 0.4-0.7% of the total weight of crushed construction waste, lime and gypsum, and the total a...

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Abstract

The invention discloses a process for producing a regenerated building waste autoclaved brick, which comprises the following steps: A, crushing the building waste till the granularity thereof is below 5 millimeters, and removing ironware and wood; B, crushing calcined lime and gypsum respectively, mixing the crushed calcined lime and gypsum according to a certain proportion, fine-grinding the mixture to form a cementing material for production, and storing the cementing material for later use respectively; C, mixing and stirring the crushed building waste, the cementing material of the calcined lime and the gypsum and water according to a certain proportion to form a mixture, digesting the mixture through a digestion chamber, and then rolling and uniformly stirring the mixture; D, feeding the digested mixture to a brick press to form a brick blank; and E, feeding the brick blank into a still kettle, steaming the brick blank, and then conveying the steamed brick blank to a finished product storage yard. According to the process, standard bricks or common hollow bricks are produced by using the building waste; the compressive strength, breaking strength, freezing resistance, dry shrinkage value and the like of the bricks can reach the national standards; and the process has the advantages of simple process, easily-obtained materials, low machining cost and the like.

Description

【Technical field】 [0001] The invention relates to a method for utilizing recycled construction waste, in particular to a production process for autoclaved bricks from recycled construction waste. 【Background technique】 [0002] With the renewal, reconstruction and construction of public and civil buildings and municipal facilities, a large number of old buildings have been demolished, and the amount of construction waste generated has accounted for the main part of urban waste. Landfill, thereby occupying a large amount of agricultural or other land resources, aggravating the deterioration of the environment. Therefore, the recycling of construction waste has become an urgent problem to be solved today. [0003] In addition, natural resources tend to be exhausted, and it will become more and more difficult to ensure the supply of high-quality concrete, sand and gravel aggregates and other construction materials. At home and abroad, especially in developed countries, the de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B18/16
CPCC04B2111/29C04B28/14Y02W30/91C04B18/167C04B18/26C04B20/0076C04B20/026C04B22/064C04B40/0071C04B40/0245
Inventor 刘心中蔡礼权翁仁贵李良光
Owner FUJIAN UNIV OF TECH
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