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Building material produced from construction garbage and preparation thereof

A technology of construction waste and building materials, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of complex production process management and increased production costs, and achieve the effect of improving the ecological environment and reducing manufacturing costs

Inactive Publication Date: 2009-01-21
SHENZHEN ZHONGXINHUAN SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these technologies utilize construction waste and domestic waste, they also need to add other relatively expensive materials in their production, such as cement, cellulose, binders and other admixtures. Adding these materials not only increases production costs, but also makes Production process management becomes complex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] The preparation method of the building material produced by utilizing construction waste of the present invention comprises the following steps:

[0019] 1. Carry out primary selection on construction waste, remove waste metal, bamboo wood, and plastic from construction waste to obtain construction waste raw materials, including masonry, concrete and soil, of which the soil content is 0-35%;

[0020] 2. Crushing raw materials, using jaw crusher and impact crusher for two-stage crushing, crushing construction waste raw materials to a particle size greater than 0 to 4mm, and using a ball mill to grind quicklime with an effective CaO content of ≥85% to less than 100 mesh;

[0021] 3. Combining raw materials, mix the crushed construction waste and quicklime fine powder according to the weight ratio of 85-96 parts of construction waste and 4-15 parts of quicklime, and then transport them to the digestion bin for 1-3 hours;

[0022] 4. Forming. The materials coming out of th...

Embodiment 1

[0024] Example 1, the soil content is 8%, the construction waste raw materials are crushed to a particle size of less than 4mm, the quicklime with CaO content ≥ 80% is ground to less than 100 mesh, and the crushed construction waste and quicklime fine powder are in a weight ratio of 90 parts of construction waste, After mixing 10 parts of quicklime evenly, transport it to the digestion bin, and stay there for 1 hour. The material from the digestion bin enters the mixer, adds 6% of the total dry powder amount, mixes thoroughly, and then transports it to the feed bin, and presses it into a hexagon on the brick press. Shaped profiles (240mm×115mm×53mm), the pressure used is 600 tons, the pressurization time lasts for 2 seconds, sent into the autoclave, maintained at a temperature of 200°C and a pressure of 8kg for 8 hours, and cooled naturally , The material coming out of the autoclave is the finished building material. According to the national standard "Sintered Ordinary Brick"...

Embodiment 2

[0025] Example 2, the soil content is 16%, the construction waste raw materials are crushed to a particle size of less than 4mm, the quicklime with a CaO content ≥ 80% is ground to less than 100 mesh, and the crushed construction waste and quicklime fine powder are in a weight ratio of 93 parts of construction waste, After mixing 7 parts of quicklime evenly, transport it to the digestion bin and stay there for 1 hour. The material from the digestion bin enters the mixer, adds 7% of the total amount of dry powder and mixes thoroughly, then transports it to the bin, and presses it into a hexagon on a brick press. Shaped profiles (240mm×115mm×53mm), using a pressure of 500 tons, pressurized for 2 seconds, sent to the autoclave, maintained at a temperature of 190°C and a pressure of 8kg for 7 hours, and cooled naturally , The material coming out of the autoclave is the finished building material. According to the national standard "Sintered Ordinary Brick" (GB5101-2003), the compr...

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Abstract

The invention discloses a method for manufacturing building materials with construction debris. The technical problem resolved by the invention is to simplify material formula and lower cost. The building material of the invention comprises the following components in weight portion: 85 to 97 portions of construction debris and 3 to 15 portions of quicklime, wherein the construction debris comprises bricks, stones and concrete, and the effective content of CaO of quicklime is more than or equal to 80 percent. The preparation method of the invention comprises the following steps of: initial separation, crushing, raw material mixing, shaping and high pressure steam curing. Compared with prior art, the method of the invention has the advantages of utilizing construction debris as main materials, realizing the cyclic utilization of waste, reducing the manufacturing cost of products and improving the ecological environment, along with safety and reliability; moreover, the building materials of the invention meet the quality standards of building materials.

Description

technical field [0001] The invention relates to a building material and a preparation method thereof, in particular to a building profile manufactured by using garbage as a main raw material and a preparation method thereof. Background technique [0002] Construction waste in a broad sense refers to the demolition of old buildings and buildings during the renovation of old cities, as well as the waste generated during construction, mainly including: soil, dregs, scrap steel bars, scrap iron wires and various scrap steel fittings, metal pipelines Waste, waste bamboo and wood, wood chips, shavings, packing boxes and bags of various decorative materials, scattered mortar and concrete, broken bricks and broken concrete blocks, yellow sand, stones and block stones scattered during transportation, these materials account for about 80% of the total construction waste. In a narrow sense, construction waste refers to bricks, stones, concrete, mortar, glass, ceramics and other wastes...

Claims

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Application Information

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IPC IPC(8): C04B18/16
CPCC04B20/02Y02W30/91C04B18/167C04B22/064
Inventor 梁文匡郑祥鸿余群胜丁铸
Owner SHENZHEN ZHONGXINHUAN SCI
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