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Environment protection type light aggregate and preparation thereof

A lightweight aggregate and environmentally friendly technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of waste of resources, mixed aggregate components, low aggregate quality, etc., to increase value, The effect of high purity and quality improvement

Inactive Publication Date: 2009-06-24
上海德滨环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, some domestic enterprises carry out recycling of construction waste, but these construction waste recycling technologies are primary and extensive recycling technologies
The existing construction waste recycled aggregate preparation method is: mixed construction waste - crushing - iron removal - sieving (coarse aggregate is returned to the cage for processing) - mixed recycled aggregate; some also add a crushing process after iron removal , the problems of this method are: the quality of the prepared aggregate is low, the composition of the aggregate is mixed, the performance is unstable, and the different material properties of different construction wastes cannot be fully utilized, so it can only be used as a filler for low-grade products
For a long time, most of the waste clay bricks in my country have been used for landfill or open-air stacking like other construction waste, which wastes resources and occupies land.

Method used

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  • Environment protection type light aggregate and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 , Preparation of environmentally friendly lightweight aggregate from reinforced concrete structure construction waste

[0035] The environment-friendly lightweight aggregate recycled from clay bricks was prepared by the following steps:

[0036] A. Use excavators, loaders, cranes and other mechanical equipment and auxiliary labor to sort out large clay brick walls and waste clay bricks from reinforced concrete construction waste;

[0037] B. Use a rod sieve to remove floating soil, and then remove non-clay brick materials through belt conveyor and manual sorting;

[0038]C. Use modular combined construction waste automatic processing equipment for crushing and iron removal with magnets. The crushing adopts jaw crushing, cone crushing, impact crushing, impact crushing, and hammer crushing;

[0039] D. Sieve the crushed clay bricks with screens with apertures of 3mm, 11mm, and 31mm in turn to obtain fine environmental-friendly lightweight aggregate, medium-coa...

Embodiment 2

[0041] Example 2 , Preparation of environmentally friendly lightweight aggregate from brick-concrete structure construction waste

[0042] The environment-friendly lightweight aggregate recycled from clay bricks was prepared by the following steps:

[0043] A. Primary purification: Use excavators, loaders, cranes and other mechanical equipment and auxiliary manual to remove reinforced concrete, ceramics, wood blocks, plastics, steel bars and other non-clay bricks in the brick-concrete construction waste.

[0044] B. Secondary purification: use a high-frequency vibration mass separator with a screen to separate and remove light substances such as wood blocks and plastics in the construction waste after the primary purification, and use a bar sieve to remove floating soil, and pass through a belt conveyor And manual sorting methods to remove non-clay brick materials again.

[0045] C. Use modular combined construction waste automatic processing equipment for crushing and iron...

Embodiment 3

[0048] Example 3 , Refining medium-coarse and environmentally-friendly lightweight aggregate

[0049] The medium-coarse light aggregate of 3mm

[0050] A. Add clean water to the spiral cleaning machine (1.2 meters in diameter and 9 meters in length) to clean medium-coarse, environmentally-friendly lightweight aggregates. Friction between the spiral blades and water rinsing to remove floating ash, fine wood chips and other impurities adsorbed on the light aggregate;

[0051] B. Dry the cleaned medium-coarse lightweight aggregate with a dryer or air-dryer to obtain refined medium-coarse and environmentally friendly lightweight aggregate;

[0052] C. Send the obtained refined medium-coarse environment-friendly lightweight aggregate to an open storage bin or a closed storage tank through a conveyor for storage.

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Abstract

The invention discloses environmental protection type light aggregate. The light aggregate is prepared from waste clay brickworks and waste clay bricks in the building rubbish. The invention also discloses a production method for the environmental protection type light aggregate. The environmental protection type light aggregate is prepared through the steps of selection, purification, crushing, sieving, refining, and the like. The environmental protection type light aggregate is characterized by high strength, low water absorption and high purity. Simultaneously, the light aggregate fills up the blank of 1,000km-grade clay ceramic aggregate, reduces the cost of light aggregate concrete and the products thereof, and greatly improves the utilization value of the building rubbish regenerated aggregate.

Description

technical field [0001] The invention relates to building material raw materials, in particular to an environment-friendly lightweight aggregate and a preparation method thereof. Background technique [0002] Building aggregate is the leading building material raw material, divided into light aggregate and heavy aggregate, density grade ≤ 1200kg / m 3 The aggregate is called lightweight aggregate, density ≥ 1200kg / m 3 aggregates are called heavy aggregates. The characteristics of building aggregates are different materials with different densities and different properties. Lightweight aggregates are light in weight and have good thermal insulation properties. The configuration is ≤800kg / m 3 Insulation lightweight aggregate concrete, 800-1400kg / m 3 Structural thermal insulation lightweight aggregate concrete, 1400-1900kg / m 3 The necessary raw material for structural lightweight aggregate concrete. Because lightweight aggregate concrete and its products have superior thermal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/16
CPCY02W30/91
Inventor 杨德志董杨张雄谢尧生冷发光黄如柏夏有月
Owner 上海德滨环保科技有限公司
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