Organic fluorosilicone and metakaolin concrete waterproofing fortifier and preparation method and application thereof

A technology of metakaolin and metakaolin powder, which is applied in the field of organofluorosilicon and metakaolin concrete waterproof enhancer and its preparation, and can solve the problems affecting the shelf life of products

Active Publication Date: 2018-10-23
CCCC FOURTH HARBOR ENG INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the reactive groups of organofluorosilicon easily interact with SiO 2 The hydroxyl groups on the surface react, so metakaolin cannot be directly mixed with organofluorosilicon, otherwise it will seriously affect the shelf life of the product

Method used

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  • Organic fluorosilicone and metakaolin concrete waterproofing fortifier and preparation method and application thereof
  • Organic fluorosilicone and metakaolin concrete waterproofing fortifier and preparation method and application thereof
  • Organic fluorosilicone and metakaolin concrete waterproofing fortifier and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Metakaolin 40%; Alkali-soluble resin 4%; Organic fluorosilicone resin 5%; Organic fluorosiloxane 3%; Organic fluorosilane 2%; Emulsifier 0.4%; The alkali-soluble resin is alkali-soluble acrylic resin, the emulsifier is fluorinated polyethylene glycol, and the pH regulator is mixed phosphate with pH=6.86.

[0030] Prepare concrete waterproof reinforcing agent according to the following steps:

[0031] (1) Ingredients;

[0032] (2) Metakaolin is soaked with an alkali-soluble resin, so that the surface of the metakaolin particles is coated with a layer of alkali-soluble resin film, and then the metakaolin powder with an alkali-soluble protective film is prepared by a spray drying process;

[0033] (3) The organofluorosilicon hydrophobic component is dispersed into the aqueous solution of the emulsifier through a high-speed shear emulsification process to prepare a stable organofluorosilicon oil-in-water emulsion; the pH value is adjusted to neutral;

[0034] (4) Mix met...

Embodiment 2

[0036] Metakaolin 50%; Alkali-soluble resin 5%; Organic fluorosilicone resin 3%; Organic fluorosiloxane 2%; Organic fluorosilane 5%; Emulsifier 0.3%; The alkali-soluble resin is alkali-soluble acrylic resin, the emulsifier is fluorinated polyethylene glycol, and the pH regulator is mixed phosphate with pH=6.86.

[0037] Prepare concrete waterproof reinforcing agent according to the following steps:

[0038] (1) Ingredients;

[0039] (2) Metakaolin is soaked with an alkali-soluble resin, so that the surface of the metakaolin particles is coated with a layer of alkali-soluble resin film, and then the metakaolin powder with an alkali-soluble protective film is prepared by a spray drying process;

[0040](3) The organofluorosilicon hydrophobic component is dispersed into the aqueous solution of the emulsifier through a high-speed shear emulsification process to prepare a stable organofluorosilicon oil-in-water emulsion; the pH value is adjusted to neutral;

[0041] (4) Mix meta...

Embodiment 3

[0043] Sample FMK1, FMK2 gained in embodiment 1, embodiment 2 are mixed in the concrete respectively, carry out waterproof, chloride absorption reduction rate inspection and analysis as follows:

[0044] Table 1 test mix ratio

[0045]

[0046] Among them, C35 is the concrete strength grade, C35 group is the blank control sample, C35-FMK1 group or C35-FMK2 group is the concrete with C35 strength grade mixed with FMK1 or FMK2.

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Abstract

The invention discloses an organic fluorosilicone and metakaolin concrete waterproofing fortifier and a preparation method and application thereof. The organic fluorosilicone and metakaolin concrete waterproofing fortifier contains the following ingredients (by weight): 30-50% of metakaolin, 3-5% of alkali-soluble resin, 5-15% of an organic fluorosilicone hydrophobic component, 0.1-1.0% of an emulsifier, 0.5-1.0% of a pH regulator and 30-50% of water, wherein the metakaolin is made into metakaolin powder with an alkali-soluble protective adhesive film. By mixing the metakaolin powder with thealkali-soluble protective adhesive film into an organic fluorosilicone oil-in-water emulsion with pH value being neutral, the organic fluorosilicone and metakaolin concrete waterproofing fortifier isprepared. Concrete with the application of the organic fluorosilicone and metakaolin concrete waterproofing fortifier as an additive has the following advantages: water absorption is obviously reduced; chloride absorption reduction rate, sulfate corrosion resistance and freezing and thawing cycle resistance of the concrete are remarkably raised; and durability of the concrete is obviously enhanced.

Description

technical field [0001] The invention relates to the field of concrete protection in civil engineering technology, in particular to an organic fluorine silicon and metakaolin concrete waterproof enhancer and a preparation method thereof. technical background [0002] Reinforced concrete is the most widely used building material in the world today. Concrete materials have tiny capillary pores. Under severe corrosive environments, harmful ions penetrate into the interior of the concrete with water as the medium, causing corrosion of steel bars and concrete through physical and chemical effects. , eventually leading to structural failure. Among them, chloride ions cause the steel bar to corrode and expand by destroying the passivation film of the steel bar; CO 3 2- with Ca(OH) 2 Combination reduces the pH value of concrete; SO 4 2- Ions cause internal expansion and destruction of concrete through physical and chemical actions. These corrosion factors are inseparable from t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B28/04C04B103/65
CPCC04B28/04C04B40/0046C04B2103/65C04B2201/50C04B14/106C04B24/2641C04B24/42C04B22/002C04B24/32C04B22/16C04B14/06C04B14/02C04B2103/302
Inventor 岑文杰范志宏熊建波张志杰王胜年温永向钟明锋
Owner CCCC FOURTH HARBOR ENG INST
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