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A special additive for permeable concrete

A technology of permeable concrete and additives, applied in the field of building materials, can solve the problems of limited use range of permeable concrete, failure of pervious concrete strength and wear resistance, difficulty in balancing water permeability and strength, etc.

Active Publication Date: 2020-10-20
RIZHAO FEM NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because permeable concrete is mostly large holes formed by coarse aggregate, it is difficult to balance water permeability and strength, which leads to the current limited use of permeable concrete. It is suitable for light road surfaces (such as sidewalks, parking lots, parks, etc.), and for high-load applications. For large-area concrete pavements such as urban roads and expressways, the strength and wear resistance of pervious concrete cannot meet the requirements according to the existing technology, which limits the wider application of pervious concrete

Method used

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  • A special additive for permeable concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A special additive for permeable concrete, which is made of the following raw materials in parts by weight: 30 parts of slag micropowder, 25 parts of diatomite, 10 parts of modified phosphogypsum, 12 parts of starch compound, 2 parts of silicone defoamer, polycarboxylate 0.5 parts of acid water reducer, 1.2 parts of sodium carbonate;

[0028] The starch compound is prepared by the following steps:

[0029] 1) Weigh raw materials by weight: 10 parts of tapioca starch, 35 parts of PEG-2003, 2 parts of hydrochloric acid, 12 parts of N,N-dimethylformamide, 2 parts of sulfamic acid;

[0030] 2) Add tapioca starch and PEG-200 into the reaction kettle, stir evenly; then add hydrochloric acid, heat up to 70°C, react for 6 hours, filter to obtain hydrolyzed tapioca starch;

[0031] 3) Add N,N-dimethylformamide and sulfamic acid to the reaction kettle, stir evenly; then add hydrolyzed tapioca starch, heat up to 90°C, react for 1h, cool naturally to room temperature, and adjust t...

Embodiment 2

[0038] A special additive for permeable concrete, which is made of the following raw materials in parts by weight: 35 parts of slag micropowder, 20 parts of diatomite, 15 parts of modified phosphogypsum, 10 parts of starch compound, 1 part of silicone defoamer, polycarboxylate 0.8 parts of acid water reducer, 1 part of sodium carbonate;

[0039] The starch compound is prepared by the following steps:

[0040] 1) Weigh raw materials by weight: 10 parts of tapioca starch, 35 parts of PEG-2003, 2 parts of hydrochloric acid, 12 parts of N,N-dimethylformamide, 2 parts of sulfamic acid;

[0041] 2) Add tapioca starch and PEG-200 into the reaction kettle, stir evenly; then add hydrochloric acid, heat up to 70°C, react for 6 hours, filter to obtain hydrolyzed tapioca starch;

[0042] 3) Add N,N-dimethylformamide and sulfamic acid into the reaction kettle, stir evenly; then add hydrolyzed tapioca starch, heat up to 90°C, react for 1h, cool naturally to room temperature, and adjust the...

Embodiment 3

[0049] A special additive for permeable concrete, which is made of the following raw materials in parts by weight: 40 parts of slag micropowder, 15 parts of diatomite, 20 parts of modified phosphogypsum, 8 parts of starch compound, 0.5 part of silicone defoamer, polycarboxylate 1 part of acid water reducer, 0.8 part of sodium carbonate;

[0050] The starch compound is prepared by the following steps:

[0051] 1) Weigh raw materials by weight: 10 parts of tapioca starch, 35 parts of PEG-2003, 2 parts of hydrochloric acid, 12 parts of N,N-dimethylformamide, 2 parts of sulfamic acid;

[0052]2) Add tapioca starch and PEG-200 into the reaction kettle, stir evenly; then add hydrochloric acid, heat up to 70°C, react for 6 hours, filter to obtain hydrolyzed tapioca starch;

[0053] 3) Add N,N-dimethylformamide and sulfamic acid to the reaction kettle, stir evenly; then add hydrolyzed tapioca starch, heat up to 90°C, react for 1h, cool naturally to room temperature, and adjust the pH...

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Abstract

The invention discloses a special additive for pervious concrete. The special additive is prepared from the following raw materials in parts by weight: 30 to 40 parts of superfine slag powder, 15 to 25 parts of kieselguhr, 10 to 20 parts of modified ardealite, 8 to 12 parts of starch compounds, 0.5 to 2 parts of organic silicon defoamers, 0.5 to 1 part of polycarboxylate superplasticizers and 0.8to 1.2 parts of sodium carbonate. The special additive for the pervious concrete has the advantages that the bonding performance between aggregates in the pervious concrete can be obviously improved;the concrete separation and water secretion can be reduced; on the basis of ensuring the pervious performance, the strength and the wear-resistant performance of the highly pervious concrete are obviously improved; the engineering construction quality is ensured.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a special additive for permeable concrete. Background technique [0002] With the rapid economic development, the land is covered by more and more dense concrete pavements or sites, and these impermeable site pavements have heat storage properties, lack of breathability and rain and snow permeability, which aggravates the deterioration of the climate. The God-given water rarely nourishes the vegetation and returns to the earth. It also increases the burden on the dredging system, and even pollutes the rivers. With the continuous improvement of urban construction, the requirements for building materials are getting higher and higher. Due to its unique structure, permeable concrete has good air permeability and water permeability, and has a good effect on alleviating the urban heat island effect, replenishing groundwater and solving urban waterlogging caused...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42
CPCC04B40/0039C04B18/141C04B14/08C04B22/144C04B24/38C04B24/42C04B24/24C04B22/10
Inventor 肖维录
Owner RIZHAO FEM NEW MATERIAL TECH
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