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Pervious concrete with heavy metal ion adsorption capacity and preparation method thereof

A technology for adsorbing heavy metals and permeable concrete, applied in the field of building materials, can solve the problems of poor mechanical properties, poor water permeability, and inability to adsorb poisons of permeable concrete, and achieve the effect of low recycling rate, low cost, and good water permeability.

Active Publication Date: 2019-04-05
WUHAN HANYANG MUNICIPAL CONSTR GRP CO LTD +1
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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 provide a kind of permeable concrete with high strength, high water permeability, and the ability to absorb heavy metal ions and its preparation method, repair and modify the recycled aggregate through adsorption materials, water reducing agents, water-based epoxy resin and other components Afterwards, permeable concrete is prepared to solve the problems of traditional permeable concrete, such as poor mechanical properties, poor water permeability, high cost, and inability to absorb toxic heavy metals.

Method used

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  • Pervious concrete with heavy metal ion adsorption capacity and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A kind of permeable concrete with the ability to absorb heavy metal ions is prepared through the following steps:

[0025] 1) Weigh raw materials according to the following mass ratio: 20.71% (14.2kg) of cement, 1.31% (900g) of silica fume, 1.66% (1136g) of adsorption material, 55.14% (37.8 kg), 18.38% (12.6kg) of recycled concrete aggregate with a particle size of 4.76-9.5mm, 0.73% (500g) of water reducing agent, and 2.07% (1420g) of water-based epoxy resin;

[0026] Wherein: the cement is PO 52.5 Portland cement;

[0027] The adsorption material is magnesium edetate-aluminum intercalation hydrotalcite;

[0028] The water reducer is a polycarboxylate high-efficiency water reducer with a solid content of 20% and a water reducing rate > 27.0%;

[0029] The solid content of the waterborne epoxy resin is 50±2%, the epoxy equivalent is 1200-1850g / eq, and the rotational viscosity is 500-3000mPa·s at 25°C;

[0030] The porosity of the recycled concrete aggregate with a par...

Embodiment 2

[0037] A kind of permeable concrete with the ability to absorb heavy metal ions is prepared through the following steps:

[0038]1) Weigh raw materials according to the following mass ratio: 21.18% (13.5kg) of cement, 1.35% (860g) of silica fume, 1.27% (810g) of adsorption material, 56.49% (36.0 kg), 18.83% (12.0kg) of recycled concrete aggregate with a particle size of 4.76-9.5mm, 0.45% (288g) of water reducing agent, and 0.43% (270g) of water-based epoxy resin;

[0039] Wherein: the cement is PO 52.5 Portland cement;

[0040] The adsorption material is magnesium edetate-aluminum intercalation hydrotalcite;

[0041] The water reducer is a polycarboxylate high-efficiency water reducer with a solid content of 20% and a water reducing rate > 27.0%;

[0042] The solid content of the waterborne epoxy resin is 50±2%, the epoxy equivalent is 1200-1850g / eq, and the rotational viscosity is 500-3000mPa·s at 25°C;

[0043] The porosity of the recycled concrete aggregate with a partic...

Embodiment 3

[0050] A kind of permeable concrete with the ability to absorb heavy metal ions is prepared through the following steps:

[0051] 1) Weigh raw materials according to the following mass ratio: 20.89% (15.7kg) of cement, 1.33% (1000g) of silica fume, 1.67% (1256g) of adsorption material, 55.62% (41.8 kg), 18.50% (13.9kg) of recycled concrete aggregate with a particle size of 4.76-9.5mm, 0.74% (552g) of water reducing agent, and 1.25% (942g) of water-based epoxy resin;

[0052] Wherein: the cement is PO 52.5 Portland cement;

[0053] The adsorption material is magnesium edetate-aluminum intercalation hydrotalcite;

[0054] The water reducer is a polycarboxylate high-efficiency water reducer with a solid content of 20% and a water reducing rate > 27.0%;

[0055] The solid content of the waterborne epoxy resin is 50±2%, the epoxy equivalent is 1200-1850g / eq, and the rotational viscosity is 500-3000mPa·s at 25°C;

[0056] The porosity of the recycled concrete aggregate with a par...

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Abstract

The invention discloses a pervious concrete with heavy metal ion adsorption capacity and a preparation method thereof and belongs to the technical field of building materials. The previous concrete isprepared from 20.89-21.18% of cement, 55.14-56.49% of recycled aggregate concrete with grain size ranging from 2.35 mm to 4.75 mm, 18.38-18.50% of recycled aggregate concrete with grain size rangingfrom 4.76 mm to 9.5 mm, 1.31-1.35% of silica fume, 1.27-1.67% of adsorption materials, 0.45-0.74% of water reducers and 0.43-2.07% of water-borne epoxy resin. Recycled aggregate concrete and cement, used as the main raw materials, are mixed with silica fume, the adsorption materials, the water reducers and water-born epoxy resin to prepare the pervious concrete through the simple process, and thus, problems of low recovery rate of building waste and low strength of recycled aggregates are solved, the pervious concrete prepared by the method has the advantages of high strength, good water permeability and low cost, further has the toxic heavy metal ion adsorption capacity, especially has good adsorption performance to Cd<2+>.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a permeable concrete capable of absorbing heavy metal ions and a preparation method thereof Background technique [0002] Since my country vigorously promoted the "sponge city" construction plan, permeable paving has become a hot research and application project in the industry. Permeable concrete is a kind of concrete prepared by a special process, which is composed of cement, water, aggregates of specific grades, admixtures, admixtures and inorganic pigments in specific proportions, and has good water permeability. It can not only meet the requirements of human activities for the use of hardened ground, but also has the ecological advantages of natural lawn and soil ground, and has quickly become an important material for permeable pavement in sponge city construction projects. [0003] For a long time, the reuse of construction waste in our country has not attracted enough a...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B38/00C04B111/20
CPCC04B28/04C04B2111/00284C04B2111/29C04B2201/50C04B18/16C04B18/146C04B24/281C04B2103/302C04B14/36C04B38/0041C04B38/0074
Inventor 黄展魏胡颖徐敏秦琛王林立严涵张裕陈琴
Owner WUHAN HANYANG MUNICIPAL CONSTR GRP CO LTD