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Foaming concrete made by waste and old concrete and production method thereof and use

A technology of waste concrete and foamed concrete, which is applied in the field of foamed concrete, can solve the problems of high cost of foamed concrete, achieve the effects of accelerating the solidification speed, ensuring continuity, and improving the safety of mining areas

Inactive Publication Date: 2009-03-25
BEIJING SIFANGRUGANG CONCRETE PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the recycling and utilization of recycled concrete aggregates is still a problem in the process of construction waste disposal and resource utilization.
In addition, due to the depletion of natural resources, the cost of producing foamed concrete using traditional sand, gravel, cement, etc. as raw materials is also increasing

Method used

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  • Foaming concrete made by waste and old concrete and production method thereof and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] After the waste concrete produced during the excavation of the concrete pavement is crushed and screened, coarse aggregate, fine aggregate and powder of different particle sizes are mixed to form recycled concrete aggregate; the recycled concrete aggregate is input into the mixer, and an appropriate amount is added The cement and water are stirred and mixed to form a gelled paste. At the same time, inject the foaming agent and an appropriate amount of water into the foaming agent barrel to form a foaming agent aqueous solution. The gelled slurry and the foaming agent aqueous solution are pumped into the high-pressure jet pump, and the gelled slurry and the foam generated by the blowing agent are mixed to form a foam slurry. Use a high-pressure jet pump to spray and pour the foam slurry into narrow slits and grooves, without mechanical tamping, to form a firm and dense filling body in narrow slits and narrow grooves.

Embodiment 2

[0032] After the waste concrete produced during the excavation of the concrete pavement is crushed and screened, coarse aggregate, fine aggregate and powder of different particle sizes are mixed to form recycled concrete aggregate; the recycled concrete aggregate is input into the mixer, and an appropriate amount is added The cement, crushed stone and water are stirred and mixed to form a cementitious slurry. At the same time, inject the foaming agent and an appropriate amount of water into the foaming agent barrel to form a foaming agent aqueous solution. The gelled slurry and the foaming agent aqueous solution are pumped into the high-pressure jet pump, and the gelled slurry and the foam generated by the blowing agent are mixed to form a foam slurry. Use a high-pressure jet pump to spray and pour the above-mentioned foam slurry on both sides of the expressway that needs to be widened, and make the outer surface of the pouring body form a vertical surface, that is, no slope i...

Embodiment 3

[0034] After crushing and screening the waste concrete produced during the construction process, mix coarse aggregate, fine aggregate and powder of different particle sizes to form recycled concrete aggregate; input the recycled concrete aggregate into the mixer, and add an appropriate amount of cement , quicklime powder, fly ash and water are stirred and mixed to form a gelled slurry. At the same time, inject the foaming agent and an appropriate amount of water into the foaming agent barrel to form a foaming agent aqueous solution. The gelled slurry and the foaming agent aqueous solution are pumped into the high-pressure jet pump, and the gelled slurry and the foam generated by the blowing agent are mixed to form a foam slurry. The above-mentioned foam slurry is sprayed and poured into the waste mine tunnel by using a high-pressure jet pump, and a compact filling body can be formed in the waste mine tunnel after the foamed concrete is solidified.

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Abstract

The invention discloses light foaming concrete made by waste concrete, and the production method and application of the foaming concrete. The foaming concrete is formed by the mixing of regenerated foaming concrete aggregate formed after the smashing and screening of the waste concrete, jellous slurry formed by adding concrete, fly ash and water, and foam generated by a foaming agent. After on-spot injection, pouring or mould pouring, the foaming concrete can be used in a plurality of aspects in municipal infrastructure construction such as weak subgrade processing, high filling subgrade, road-widening subgrade, temporary subgrade, various underground pipeline foundation, narrow slot and small clearance space filling, road landslide emergency backfilling, building heat preservation, sound insulation walls and the like. The adoption of the waste concrete for making the foaming concrete has the advantages of utilizing the waste, being environment-friendly, saving energy and having low cost, and the like, and the produced foaming concrete has a plurality of good performances such as light weight, no lateral confinement compression resistance, self-compaction and vibro-free property, and the like.

Description

technical field [0001] The present invention relates to a kind of foamed concrete, in particular, the present invention relates to a kind of foamed concrete made by using construction waste and its production method and application. Background technique [0002] A large amount of waste concrete is produced during construction, maintenance or demolition of construction projects; in addition, a large amount of waste, defective products and residues will be formed in the process of using concrete for construction and production of building components, and a large amount of waste concrete will also be produced. The treatment of these waste concrete has become an urgent problem. The traditional method is to discard or landfill these waste concrete as garbage, which is undoubtedly a waste and damage to land resources. At present, there is another treatment method, that is, after crushing, cleaning and grading waste concrete blocks, they are mixed in a certain proportion to form r...

Claims

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Application Information

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IPC IPC(8): C04B38/00C04B28/00C04B18/16
CPCC04B2111/00146C04B28/02C04B18/167C04B2111/28C04B2111/0075C04B2111/52C04B2111/00103C04B2111/00663Y02W30/91C04B20/0076C04B20/02C04B20/026C04B14/02C04B14/06C04B22/064C04B38/10C04B40/0028C04B18/08
Inventor 梁林华梁彬
Owner BEIJING SIFANGRUGANG CONCRETE PROD
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