Method for preparing baking-free bricks from high soil content construction waste

A technology of construction waste and unburned bricks, which is applied in the direction of sustainable waste treatment, solid waste management, and climate sustainability, and can solve problems such as unusable construction waste, a large proportion of adhesives, and the impact of unburned bricks , to achieve the effects of flexible molding method, less gelling substance content, good economic and social benefits

Active Publication Date: 2010-10-13
广东新立晟环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent "construction waste brick and its manufacturing method" (patent No. CN1673160) provides a kind of method for preparing burn-free brick with construction waste, but the weight and number ratio of its construction waste and adhesive is 4~5: 1, Adhesives account for a large proportion, and the cost is high; and construction waste with high soil content cannot be used, because construction waste is inevitably mixed with impurities such as clay that are difficult to separate during the handling process, which avoids its preparation. Burning Bricks Has Serious Effects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: Construction waste is mainly waste concrete and waste red bricks and masonry mortar adhered therebetween, crushed to a particle size of less than 3mm, and mixed with 10% red loam ground to a particle size of less than 0.5mm. The mass ingredient ratio is: construction waste 76%, fly ash 4%, slag powder 8%, slaked lime 3%, gypsum 4%, sodium metasilicate 3%, silicate clinker 2%. Add 22% water and stir for 8 minutes, put it into the brick mold and vibrate compactly, demould after 24 hours, keep it moist (humidity ≥ 90%) at room temperature for 10 days. Test results: the compressive strength is 33.7MPa, and the strength after soaking in water for 1 day is 27.0MPa, with a slight frost.

Embodiment 2

[0016] Embodiment 2: Construction waste is mainly waste concrete and waste red bricks and masonry mortar adhered therebetween, crushed to a particle size of less than 3mm, and mixed with 10% red loam ground to a particle size of less than 0.5mm. The mass ingredient ratio is: construction waste 80%, fly ash 6%, slag powder 4%, slaked lime 3%, gypsum 3%, silicate clinker 2%, sodium metasilicate 2%. Add 10% water and stir for 8 minutes, put it into a pressure brick mold and form it under 30MPa pressure, demould immediately, keep it moist (humidity ≥ 90%) and maintain it at room temperature for 10 days. Test results: the compressive strength is 25.0MPa, and the strength after soaking in water for 1 day is 21.0MPa, without frost.

Embodiment 3

[0017] Embodiment 3: The construction waste is mainly waste concrete and waste mortar chips, which are crushed until the particle size is less than 15 mm. The mass proportioning ratio is: construction waste 80%, phosphorus slag 5%, slaked lime 2%, gypsum 1%, sodium sulfate 1%, silicate clinker 11%. Add 16% water and stir for 5 minutes, put it into the brick mold and vibrate compactly, demould after 24 hours, keep it moist (humidity ≥ 90%) at room temperature for 28 days. Test results: the compressive strength is 28.7MPa, and the strength after soaking in water for 1 day is 24.1MPa, without frost.

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Abstract

The invention belongs to the technical fields of environmental engineering and building materials, and in particular relates to a method for preparing baking-free bricks from high soil content construction waste. The method comprises the following steps of: uniformly mixing the construction waste, a mixture of one or more solid industrial solid wastes, a mixture of gypsum powder and lime powder, a mixture of one or more water-soluble solid alkali metal salt powders or aqueous solution thereof, and silicate-sintered clinker in a certain ratio, adding water to stir the materials, and putting the materials into a mold for vibrating molding compaction or pressurized molding compaction; and demolding after adobe maintenance or directly demolding. The method has the advantages of low content of cementing materials and flexible molding method, can fully utilize the construction waste, greatly reduces the cost, and has good economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering and building materials, and in particular relates to a method for preparing non-burning bricks from construction waste with high soil content. Background technique [0002] Construction waste mainly comes from discarded bricks, fragments of reinforced concrete, roof insulation and waterproofing, doors and windows, debris of decoration materials and other sundries in construction projects and demolition and renovation projects. With the intensification of urban reconstruction and demolition efforts, construction waste has increased significantly. These construction wastes not only occupy the land, but also pollute the environment, which has become a major social hazard. Using construction waste to prepare new unburned bricks can not only effectively deal with waste, but also meet the current development requirements of wall materials. Chinese patent "construction waste brick and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/30
CPCC04B28/14Y02W30/91C04B7/00C04B14/045C04B14/10C04B14/26C04B18/0409C04B18/08C04B18/141C04B18/145C04B18/16C04B20/0076C04B22/064C04B22/147C04B40/0028C04B40/0082C04B22/062
Inventor 彭美勋
Owner 广东新立晟环保科技股份有限公司
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