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Method for preparing regenerated pervious concrete

A technology of permeable concrete and waste concrete blocks, which is applied in ceramic products, sustainable waste treatment, solid waste management, etc. It can solve the problems of poor corrosion, easy clogging of pores, poor durability, etc., and achieve good corrosion resistance and improve The effect of service life

Inactive Publication Date: 2017-09-01
汪逸凡
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is to provide a regenerated permeable concrete for the existing pervious concrete with poor strength and salt corrosion resistance, poor durability, short duration of water permeation, and easy clogging of pores. Preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Weigh 200kg of waste concrete blocks and put them into a jaw crusher for crushing. After magnetic separation and iron removal, the crushed materials are soaked in water to remove floating impurities, and then filtered to obtain filter residues. After natural air drying, put the filter residues into a crusher for crushing and screen out The crumbs with a particle size of 5mm are added to the horizontal grinder and ground for 2 hours to obtain recycled aggregates. Take 0.3kg sodium lauryl sulfate, 0.1kg sodium gluconate, and 0.4kg sodium silicate , 0.8kg polyacrylamide, add 150L deionized water, stir at 200r / min for 10min, then add 80kg of recycled aggregate, continue stirring for 20min and let it stand for 1h, then filter to obtain filter cake, and air-dry the filter cake naturally to obtain enhanced regeneration Aggregate, weigh 15kg of discarded oyster shells, wash them with water, place them in a drying oven, dry them at 105°C to constant weight, then transfer them to ...

example 2

[0021] Weigh 250kg of waste concrete blocks and put them into a jaw crusher for crushing. After magnetic separation and iron removal, the crushed materials are soaked in water to remove floating impurities, and then filtered to obtain filter residues. After natural air drying, put the filter residues into a crusher for crushing and screen The crumbs with a particle size of 8mm are added to the horizontal grinder and ground for 2 hours to obtain recycled aggregates. Take 0.4kg sodium lauryl sulfate, 0.2kg sodium gluconate, and 0.5kg sodium silicate , 1.0kg polyacrylamide, add 175L deionized water, stir at 250r / min for 15min, then add 90kg of recycled aggregate, continue stirring for 25min and let it stand for 1h, then filter to obtain filter cake, air dry the filter cake naturally to obtain enhanced regeneration Aggregate, weigh 18kg of discarded oyster shells, wash them with water, place them in a drying oven, dry them at 108°C to constant weight, then transfer them to a pulver...

example 3

[0024] Weigh 300kg of waste concrete blocks and add them to a jaw crusher for crushing. After magnetic separation and iron removal, the crushed materials are soaked in water to remove floating impurities, and then filtered to obtain filter residues. The crumbs with a particle size of 10mm are added to the horizontal grinder for grinding for 3 hours to obtain recycled aggregates. Take 0.5kg sodium lauryl sulfate, 0.3kg sodium gluconate, and 0.6kg sodium silicate , 1.2kg polyacrylamide, add 200L deionized water, stir at 300r / min for 20min, then add 100kg recycled aggregate, continue stirring for 30min and let it stand for 2h, then filter to obtain filter cake, air-dry the filter cake naturally to obtain enhanced regeneration Aggregate, weigh 20kg of discarded oyster shells, wash them with water, place them in a drying oven, dry them at 110°C to constant weight, then transfer them to a pulverizer for crushing, pass through a 80-mesh sieve to obtain oyster shell powder, weigh Put ...

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Abstract

The invention discloses a method for preparing regenerated pervious concrete, and belongs to the technical field of building material preparation. The method comprises the following steps: taking waste concrete blocks as a raw material, performing crushing, removing foreign matters, and grinding to obtain recycled aggregate; preparing a solution from lauryl sodium sulfate, sodium gluconate and the like, mixing with the recycled aggregate, filtering, drying filter dregs in air, preparing intensified recycled aggregate, mixing and grinding waste oyster shells, coal ash, silica ash and the like to obtain a mixed powder material, finally stirring the prepared mixed powder material, the intensified recycled aggregate, ordinary Portland cement and the like, further adding a polycarboxylate superplasticizer and deionized water, mixing, and discharging, thereby obtaining the regenerated pervious concrete. On premise that the porosity and the pervious coefficient of the regenerated pervious concrete are remarkably higher than those of common previous concrete, the compression strength of the regenerated pervious concrete is still higher than that of the common previous concrete, good corrosion properties are achieved, and thus the service life of a previous concrete pavement is remarkably prolonged.

Description

technical field [0001] The invention discloses a method for preparing recycled permeable concrete, which belongs to the technical field of building material preparation. Background technique [0002] In modern urban construction, most pavements are paved with stone slabs, cement and cement square bricks. Although the hardened pavement is neat and durable, it lacks the ability to breathe, absorb heat and penetrate rainwater. A series of environmental problems, such as the interruption of the replenishment of groundwater by rainwater during rainfall, make it difficult for the groundwater level to rise. With the loss of rainwater, the surface of the city will become more dry, which will aggravate the hazards of urban dust pollution; on the other hand, when the rainfall is heavy, the urban drainage will be poor, which will easily cause urban floods and serious consequences of poor traffic. Secondly, the hardened pavement will also cause many environmental and ecological negativ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B20/02C04B38/00C04B18/16C04B111/20
CPCC04B20/023C04B28/04C04B2111/00284C04B2111/0075C04B2111/20C04B2201/50C04B16/0625C04B2103/302C04B14/28C04B18/08C04B18/146C04B18/16C04B38/0038C04B38/0074Y02W30/91
Inventor 汪逸凡杨阳孙冬
Owner 汪逸凡
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