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Method for preparing high-strength fabricated artificial stone from construction waste

A construction waste, prefabricated technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems such as the inability of high-value utilization of recycled micropowder and the difficulty of separating brick and concrete.

Inactive Publication Date: 2020-10-23
SOUTHWEAT UNIV OF SCI & TECH
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Problems solved by technology

[0004] In view of the difficulty in separating bricks from concrete (concrete) in construction waste and the inability of high-value utilization of recycled micropowder, this patent provides a method for separating bricks from concrete and a method for producing prefabricated artificial stone from micropowder to promote high-value construction waste use

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  • Method for preparing high-strength fabricated artificial stone from construction waste
  • Method for preparing high-strength fabricated artificial stone from construction waste
  • Method for preparing high-strength fabricated artificial stone from construction waste

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with specific examples.

[0027] A method for preparing high-strength assembled artificial stone from construction waste, which is characterized in that it comprises the following steps: separating brick and concrete construction waste through gravity separation, grinding the concrete in a hot air self-mill to obtain recycled aggregate and fine powder; After adding calcium raw material, use steam kinetic energy grinding, and then rapid thermal activation in countercurrent heater to obtain active micropowder; add activator, reinforcing agent, surfactant, water repellent, water to active micropowder, stir evenly, and shape , Obtain high-strength fabricated artificial stone after curing.

[0028] See Table 1 for the formulation of calcium raw materials added to the micropowder, the rapid thermal activation temperature and time in the countercurrent heater, and the activity of the active micropow...

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Abstract

The invention discloses a method for preparing high-strength fabricated artificial stone from construction waste, which comprises the following steps: reselecting and separating brick concrete construction waste, and grinding concrete in a hot air autogenous mill to obtain recycled aggregate and micro powder; adding a calcareous material into the micro powder, grinding by using steam kinetic energy, and then carrying out rapid thermal activation in a countercurrent heater to obtain active micro powder; and adding an excitant, a reinforcing agent, a surfactant, a water repellent and water intothe active micro powder, uniformly stirring, molding and curing to obtain the high-strength fabricated artificial stone. The method is low in production cost and high in efficiency, and high-quality cyclic utilization of resources is achieved.

Description

technical field [0001] The invention relates to the field of resource utilization of construction waste, in particular to the application of concrete regenerated micropowder, which can be used in the field of prefabricated buildings to prepare prefabricated artificial stone. Background technique [0002] With the acceleration of industrialization and urbanization, the amount of construction waste generated in urban demolition and urban construction is increasing day by day, and the amount of construction waste in my country has accounted for more than 1 / 3 of the total amount of urban waste Utilization [J]. Construction Technology, 1999, 28(5): 15-16]. Except for a small amount of steel bars, urban construction waste mainly includes concrete blocks, crushed stones, brick and tile fragments, waste mortar, architectural glass and architectural ceramic fragments, etc. The demolition or reconstruction of houses in every area will generate a large amount of construction waste. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B20/02C04B18/16C04B111/54
CPCC04B28/006C04B20/026C04B18/167C04B20/02C04B2111/542C04B14/383C04B2103/40C04B24/08Y02W30/91
Inventor 谭宏斌马小玲董发勤曲瑞雪范晓玲吴涛杨飞华李玉香刘元正张吉秀李芳邓秋林王进明王进贺小春
Owner SOUTHWEAT UNIV OF SCI & TECH
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