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Preparation method of concrete erosion medium inhibiting material

A concrete and medium technology, applied in the field of concrete, can solve the problems of concrete cracking, inability to meet the waterproof and anti-seepage requirements of construction projects, and the limited waterproof effect of waterproofing agents, and achieve good waterproof, excellent plugging effect, and improved compatibility.

Active Publication Date: 2016-05-25
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many kinds of waterproofing agents, among which the main components of inorganic waterproofing agents are chloride salts, lithium chloride salts, sulfates, water glass, zirconium compounds, mineral powders, etc.; the main components of organic waterproofing agents are fatty acid metal salts and Various emulsions, in recent years, an expansion agent has been developed as the main agent, and an expansion waterproofing agent compounded with other additives, but improper use will cause concrete cracking
The existing waterproofing agent has limited waterproofing effect and cannot meet the waterproof and anti-seepage requirements of construction projects.

Method used

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  • Preparation method of concrete erosion medium inhibiting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Mix 200g of nano-silica and 10g of methyltrimethoxysilane evenly, continue to stir and heat to 100°C for 90 minutes to obtain hydrophobically modified nano-silica;

[0038] Heat 50g of stearic acid to 65°C to melt, add 5g of nonionic emulsifier Pingping plus 20, 1g of sodium dodecyl sulfate SDS, 50g of water at 65°C, and shear at 1500r / min for 10min, then Quickly add 284g of water at 25°C and stir for 10min, continue to add 5g of sodium polyacrylate dispersant, 100g of hydrophobically modified nano-silica, 5g of hydroxyethyl cellulose thickener, and 0.5g of mineral oil defoamer to obtain Concrete erosion media suppression material. Its solid content was tested to be 33%.

Embodiment 2

[0040] Mix 200g of nano-silica and 10g of methyltriethoxysilane evenly, continue to stir and heat to 100°C for 90 minutes to obtain hydrophobically modified nano-silica;

[0041]Heat 50g of stearic acid to 75°C to melt, add a water dispersion consisting of 5g of methyltriethoxysilane, 9g of nonionic emulsifier Tween 80, 1g of sodium ethoxylated alkyl sulfate, and 50g of water at 75°C , 2000r / min high-speed shearing for 20min, then quickly add 223g of 25°C water and stir for 10min, continue to add 10g of sodium polyacrylate dispersant, 150g of hydrophobically modified nano-silica, 2g of hydroxyethyl cellulose thickener, 0.5g of mineral oil defoamer, that is, to obtain concrete corrosion medium suppression material. Its solid content was tested to be 45%.

Embodiment 3

[0043] Mix 200g of nano-silica and 10g of propyltriethoxysilane evenly, continue to stir and heat to 100°C for 90 minutes to obtain hydrophobically modified nano-silica;

[0044] Heat 50g of stearic acid to 85°C to melt, add 10g of propyltriethoxysilane, 9g of nonionic emulsifier Tween 80, 1g of isomeric alcohol polyoxyethylene ether sodium sulfate, and 50g of water at 85°C for dispersion liquid, 2000r / min high-speed shear for 20min, then quickly add 162g of 15°C water and stir for 20min, continue to add 15g of sodium polyacrylate dispersant, 200g of hydrophobically modified nano-silica, 4g of hydroxyethyl cellulose thickener , that is, the medium-inhibiting material for concrete erosion is obtained. Its solid content was tested to be 58%.

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Abstract

The invention provides a preparation method of a concrete erosion medium inhibiting material. The concrete erosion medium inhibiting material has good waterproof and hole plugging effects. The preparation method comprises the following steps that ingredients including hydrophobic stearic acid / stearate, optional organosilane A, hydrophobic modified nano-silica, dispersing agents, emulsifying agents, optional thickening agents, optional defoaming agents and water are mixed to be made into emulsion; the concrete erosion medium inhibiting material is obtained, wherein the mass percentage of the hydrophobic stearic acid / stearate is 10 to 20 percent; the mass percentage of the organosilane A is 0 to 10 percent; the mass percentage of the hydrophobic modified nanometer silicon dioxide is 20 to 40 percent; the hydrophobic modified nanometer silicon dioxide is obtained through performing heating reaction on nanometer silicon dioxide and organosilane B; the mass of the organosilane B is 5 to 10 percent of that of the nanometer silicon dioxide.

Description

technical field [0001] The invention relates to the field of concrete, in particular to a preparation method of a concrete erosion medium suppression material. Background technique [0002] Concrete is the most widely used building material in civil engineering today, but many concrete materials today fail prematurely due to various reasons, some are caused by improper structural design, but most of them are caused by insufficient durability and corrosion of the structure. . Water plays a very important role in the corrosion process, especially the concrete materials in coastal areas are eroded due to the moist moisture in the sea and air, and the chloride salts rich in sea water invade the interior of the concrete structure, making It fails due to corrosion. Therefore, improving the waterproof and anti-seepage ability is of great significance for improving the durability of concrete. [0003] Adding waterproofing agent to concrete can improve its waterproof and anti-seep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B24/08C04B103/61
CPCC04B40/0039C04B2103/61C04B24/085C04B24/42C04B22/06C04B2103/408C04B2103/0068C04B2103/44C04B2103/50
Inventor 蒋永菁李磊王瑞王洪松田倩
Owner JIANGSU SOBUTE NEW MATERIALS
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