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A functional slow-release core-shell light aggregate and its preparation method

A slow-release, lightweight aggregate technology, applied in the field of building materials, can solve the problems of poor root resistance control of green plants, and achieve the effects of inhibiting excessive root growth, important economy, and energy saving

Active Publication Date: 2021-03-23
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention aims to propose a functional slow-release core-shell light aggregate to solve the problem of poor root resistance control effect of existing green plants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A functional slow-release core-shell light aggregate, including a core and a shell; the mass ratio of the core and the shell is 1:1, wherein, in terms of mass percentage, the raw material composition of the core is: sludge: 65%, copper tailings : 15%, CuSO 4 ·5H 2 O: 10%, KOH: 3%, bentonite: 7%; by mass percentage, the raw material composition of the shell is: polluted soil: 75%, sludge: 15%, glass powder: 10%.

[0032] The above-mentioned functional slow-release core-shell light aggregate is specifically prepared by the following method:

[0033] 1) According to the above raw material ratio, the sludge was mixed with copper tailings, CuSO 4 ·5H 2 After O, KOH, and bentonite are stirred and mixed evenly, use a ball forming machine to granulate, the ball forming speed is 35r / min, and the disc rotation angle is 45° to obtain the core green body;

[0034] 2) According to the ratio of the above raw materials, mix the polluted soil, sludge and glass powder evenly to obta...

Embodiment 2

[0039] A functional slow-release core-shell light aggregate, including a core and a shell; the mass ratio of the core and the shell is 1:1, wherein, by mass percentage, the raw material composition of the core is: sludge: 68%, copper tailings : 15%, CuSO 4 ·5H 2 O: 8%, KOH: 3%, bentonite: 6%; by mass percentage, the raw material composition of the shell is: polluted soil: 75%, sludge: 15%, glass powder: 10%.

[0040] The above-mentioned functional slow-release core-shell light aggregate is specifically prepared by the following method:

[0041] 1) According to the above raw material ratio, the sludge was mixed with copper tailings, CuSO 4 ·5H 2 After O, KOH, and bentonite are stirred and mixed evenly, use a ball forming machine to granulate, the ball forming speed is 35r / min, and the disc rotation angle is 45° to obtain the core green body;

[0042] 2) According to the ratio of the above raw materials, mix the polluted soil, sludge and glass powder evenly to obtain shell p...

Embodiment 3

[0047] A functional slow-release core-shell light aggregate, including a core and a shell; the mass ratio of the core and the shell is 1:1, wherein, in terms of mass percentage, the raw material composition of the core is: sludge: 70%, copper tailings : 15%, CuSO 4 ·5H 2 O: 7%, KOH: 2%, bentonite: 6%; by mass percentage, the raw material composition of the shell is: polluted soil: 75%, sludge: 15%, glass powder: 10%.

[0048] The above-mentioned functional slow-release core-shell light aggregate is specifically prepared by the following method:

[0049] 1) According to the above raw material ratio, the sludge was mixed with copper tailings, CuSO 4 ·5H 2 After O, KOH, and bentonite are stirred and mixed evenly, use a ball forming machine to granulate, the ball forming speed is 30r / min, and the disc rotation angle is 45° to obtain the inner core body;

[0050] 2) According to the ratio of the above raw materials, mix the polluted soil, sludge and glass powder evenly to obtai...

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Abstract

The invention provides a functional slow-release core-shell lightweight aggregate and a preparation method thereof, and the functional slow-release core-shell lightweight aggregate comprises an innercore and an outer shell; wherein the mass ratio of the inner core to the outer shell is 1:1-2:1; wherein the inner core is prepared from the following components in percentage by mass: 65 percent to 80 percent of sludge, 10 percent to 20 percent of copper tailings, 5 percent to 10 percent of CuSO4.5H2O, 1 percent to 5 percent of KOH, and 3 percent to 8 percent of bentonite; the shell comprises thefollowing components in percentage by mass: 75%-85% of contaminated soil, 10%-15% of sludge and 5%-10% of glass powder. The sludge is used as a main raw material; copper tailings, CuSO4.5H2O and a slow-release auxiliary agent are added to prepare an inner core; then, a shell is prepared by adopting polluted soil, sludge and glass powder; the shell is coated on the inner core through a low-temperature sintering method to form a core-shell structure with different substances inside and outside and different water contents, so that on one hand, the resource utilization rate of solid wastes suchas sludge, polluted soil and copper tailings is improved, on the other hand, the excessive growth of plants can be effectively inhibited, and very important economic and environment-friendly benefitsare achieved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a functional slow-release core-shell light aggregate and a preparation method thereof. Background technique [0002] At present, my country is actively promoting urban greening, among which building roof greening is an important one. Roof greening can increase the urban green area, improve the urban environment, and play an effective role in energy saving. However, there are also some technical problems in roof greening. Excessive growth of plant roots will cause damage to building walls and roofs to a certain extent, affecting the service life of the building and causing economic losses. [0003] At present, there have been relevant reports at home and abroad on the control of root resistance of roof green plants. For example, the Chinese invention patent of CN103755296A "root-resistance carbon and preparation and cultivation method of roof planting green resistance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/02C04B20/10C04B18/04
CPCC04B18/027C04B20/1074C04B18/023C04B18/0427C04B18/12C04B22/142C04B22/062C04B14/104C04B20/1055C04B20/1007Y02W30/91
Inventor 蹇守卫杨欣李相国高文斌李宝栋黄伟超
Owner WUHAN UNIV OF TECH
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