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Water permeable brick capable of adsorbing heavy metal ions

A technology for adsorbing heavy metals and ions, applied in the field of building materials, can solve problems such as pollution, but cannot solve urban traffic problems, and achieve the effect of solving pollution treatment problems.

Active Publication Date: 2011-07-20
北京新奥混凝土集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to functionalize the permeable cement-based material (permeable brick) so that it can absorb heavy metal ions on the basis of ensuring the basic performance of the permeable brick (ensure strength, fast drainage, prevent road accumulation, and replenish groundwater). That is to provide a permeable brick that can absorb heavy metal ions, and effectively solve the problem of pollution treatment caused by urban traffic that cannot be solved by existing pavement bricks

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 1. The thickness of the surface structure is 3mm, and the mixing ratio is: 25 parts of iron-aluminate cement, 60 parts of sand, and 15 parts of steel slag; the thickness of the lower layer is 45 mm, and the mixing ratio is: 18 parts of iron-aluminate cement, 2 parts of zeolite, 56 parts of aggregate and 24 parts of fine aggregate; the water-cement ratio is 0.3.

[0014] Formed in a secondary cloth process and then cured with steam.

[0015] a. The compressive strength of permeable bricks at different ages is:

[0016] age (d)

[0017] b. Adsorption of heavy metal ions:

[0018] To simulate the pollution of heavy metal ions in urban roads in Beijing (much higher than the specified safe concentration), the preparation contains four kinds of heavy metal ions Zn 2+ , Pb 2+ 、Cu 2+ 、Cd 2+ The corresponding concentrations are 79.3mg / L, 88.5mg / L, 17.5mg / L, 13.2mg / L respectively, and the solution passes through the permeable brick at a flow rate of 70L / h.

[0019...

Embodiment 2

[0022] 2. The thickness of the surface structure is 4mm, and the mix ratio is: 30 parts of ferroaluminate cement, 55 parts of sand, and 15 parts of steel slag;

[0023] The thickness of the substructure is 40mm, and the mixing ratio is: ferroaluminate cement: 25 parts, zeolite 5 parts, coarse aggregate 50 parts, fine aggregate 20 parts, and the water-cement ratio is 0.36.

[0024] Formed in a secondary cloth process and then cured with steam.

[0025] a. The compressive strength of permeable bricks at different ages is:

[0026] age (d)

[0027] b. Adsorption of heavy metal ions:

[0028] To simulate the pollution of heavy metal ions in urban roads in Beijing (much higher than the specified safe concentration), the preparation contains four kinds of heavy metal ions Zn 2+ , Pb 2+ 、Cu 2+ 、Cd 2+ The corresponding concentrations are 79.3mg / L, 88.5mg / L, 17.5mg / L, 13.2mg / L respectively, and the solution passes through the permeable brick at a flow rate of 70L / h.

[...

Embodiment 3

[0032] 3. The thickness of the surface structure is 5mm, and the mixing ratio is: 25 parts of iron-aluminate cement, 65 parts of sand, and 10 parts of steel slag; the thickness of the lower layer is 35 mm, and the mixing ratio is: 15 parts of iron-aluminate cement, 1 part of zeolite, 60 parts of coarse aggregate and 24 parts of fine aggregate, with a water-cement ratio of 0.27.

[0033] Formed in a secondary cloth process and then cured with steam.

[0034] a. The compressive strength of permeable bricks at different ages is:

[0035] age (d)

[0036] b. Adsorption of heavy metal ions:

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Abstract

The invention discloses a water permeable brick capable of adsorbing heavy metal ions, and belongs to the field of building materials. A paving brick has a double-layer structure, wherein the surface layer is made of ferroaluminate cement mortar, and the lower layer is made of ferroaluminate cement concrete; the ferroaluminate cement mortar of the surface layer comprises the following components in percentage by weight: 25 to 30 percent of ferroaluminate cement, 55 to 65 percent of sand and 10 to 15 percent of steel slag; and the ferroaluminate cement concrete of the lower layer comprises the following components in percentage by weight: 15 to 30 percent of ferroaluminate cement, 1 to 5 percent of zeolite, 50 to 60 percent of coarse aggregate and 20 to 30 percent of fine aggregate. Since the water permeable brick capable of adsorbing the heavy metal ions has the double-layer structure which is constructed by different materials, the heavy metal ions can be adsorbed on the basis of guaranteeing basic performance of the water permeable brick; and the problem of pollution treatment caused by urban traffic which cannot be solved by the conventional paving brick can be practically solved.

Description

technical field [0001] The invention belongs to the field of building materials and relates to a permeable brick capable of absorbing heavy metal ions. technical background [0002] In cities, the combustion of a large amount of automobile fuel, the omission of engine oil, the wear of tires and the peeling off of metal bodies and parts will produce a large number of heavy metal particles (including ions and solid fine particles) pollutants such as Pb, Cd, and Zn. These pollutants will settle on the surface of the road, and after the initial rain wash, they will be discharged into the river with the water flow or seep into the groundwater source, thereby causing serious pollution of the urban water source. Part of the particles in the air will enter the soil with the rainwater and absorbed by plants Some heavy metals will not only endanger plant life, but also gradually transfer and accumulate in the biological chain will endanger the health of more organisms in nature. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C5/00E01C5/22
CPCC04B28/06Y02W30/91C04B14/06C04B18/142C04B14/02C04B14/047C04B20/0096
Inventor 崔素萍杜鑫徐西奎兰明章王子明王亚丽毛倩瑾
Owner 北京新奥混凝土集团有限公司
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