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.
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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

Example Embodiment

[0029] Example 1

[0030] After crushing and sieving the waste concrete produced during the excavation of the concrete pavement, coarse aggregates, fine aggregates and powders of different particle sizes are mixed to form recycled concrete aggregates; the recycled concrete aggregates are fed into the mixer, and an appropriate amount is added The cement 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 tank to form an aqueous solution of the foaming agent. The gelled slurry and the foaming agent aqueous solution are sucked into the high-pressure jet pump together, and the gelled slurry and the foam generated by the foaming agent are mixed to form a foamed slurry. The high-pressure jet pump is used to spray and pour the foam slurry into the narrow slits and narrow grooves. Without mechanical tamping, a stable and dense filling body can be formed in the narrow slits and narrow ...

Example Embodiment

[0031] Example 2

[0032] After crushing and sieving the waste concrete produced during the excavation of the concrete pavement, coarse aggregates, fine aggregates and powders of different particle sizes are mixed to form recycled concrete aggregates; the recycled concrete aggregates are fed into the mixer, and an appropriate amount is added The cement, crushed stone 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 tank to form an aqueous solution of the foaming agent. The gelled slurry and the foaming agent aqueous solution are sucked into the high-pressure jet pump together, and the gelled slurry and the foam generated by the foaming agent are mixed to form a foamed slurry. Use a high-pressure jet pump to spray and pour the aforementioned foam slurry on both sides of the expressway that needs to be widened, and make the outer surface of the cast body form a vertical surfa...

Example Embodiment

[0033] Example 3

[0034] After crushing and sieving the waste concrete produced in the construction process, the coarse aggregate, fine aggregate and powder of different particle sizes are mixed to form recycled concrete aggregate; the recycled concrete aggregate is fed into the mixer, and an appropriate amount of cement is added , 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 tank to form an aqueous solution of the foaming agent. The gelled slurry and the foaming agent aqueous solution are sucked into the high-pressure jet pump together, and the gelled slurry and the foam generated by the foaming agent are mixed to form a foamed slurry. A high-pressure jet pump is used to spray and pour the aforementioned foam slurry into the waste mine tunnel. After the foamed concrete is solidified, a compact filling body can be formed in the waste tunnel.

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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

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Claims

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Application Information

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Owner BEIJING SIFANGRUGANG CONCRETE PROD
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