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Self-waterproof corrosion-resistant material for being doped in concrete and preparation method and application thereof

A technology of concrete inner and anti-corrosion materials, which is applied in the field of preparation of alkyl silanized silica fume powder, can solve the problems of high price, and achieve the effect of low price, simple manufacturing process and excellent hydrophobic performance

Active Publication Date: 2017-08-18
CCCC FOURTH HARBOR ENG INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Silicone hydrophobic powder has been used as a hydrophobic material in the production of dry-mixed mortar, but it is expensive, so it is necessary to further develop cheaper powder hydrophobic and waterproof materials

Method used

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  • Self-waterproof corrosion-resistant material for being doped in concrete and preparation method and application thereof
  • Self-waterproof corrosion-resistant material for being doped in concrete and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for preparing self-integrated waterproof and anti-corrosion materials in concrete, comprising the following steps: (P1) selecting 21.0 parts of alkyl silane, 35.0 parts of silica fume, 42.0 parts of water, 1.5 parts of calcium hydroxide, and fumed silica according to parts by mass. 0.5 parts; Alkylsilane is isobutyltriethoxysilane (one or more of isooctyltriethoxysilane, n-octyltriethoxysilane, etc. can also be used or combined with isobutyltriethoxysilane combination of oxysilanes).

[0033] (P2) Using silica fume as the main component, add alkyl silane, and stir at a low speed (500 rpm), so that the silica fume is completely infiltrated by the alkyl silane, and a mixture A is obtained;

[0034] (P3) Calcium hydroxide and fumed silica are mixed into water, and stirred to make calcium hydroxide and fumed silica suspension B;

[0035] (P4) Mix mixture A and suspension B, and shear emulsify at high speed (8000 rpm) in a high-speed disperser to obtain a composite...

Embodiment 2

[0039]A method for preparing concrete with self-generated waterproof and anti-corrosion materials, comprising the following steps:

[0040] (P1) Select 21.0 parts of alkylsilane, 35.0 parts of silica fume, 41.9 parts of water, 2.0 parts of calcium hydroxide, and 0.1 part of fumed silica in parts by mass; the alkylsilane is isooctyltriethoxysilane.

[0041] (P2) Using silica fume as the main component, add alkyl silane, and stir at a low speed (500 rpm), so that the silica fume is completely infiltrated by the alkyl silane, and a mixture A is obtained;

[0042] (P3) Calcium hydroxide and fumed silica are mixed into water, and stirred to make calcium hydroxide and fumed silica suspension B;

[0043] (P4) Mix mixture A and suspension B, and shear emulsify at high speed (8000 rpm) in a high-speed disperser to obtain a composite "water-in-oil-in-water" (W / O / W) Creamy emulsion C with delicate and stable structure;

[0044] (P5) Silica fume in paste emulsion C forms hydroxyl group...

Embodiment 3

[0047] A method for preparing concrete with self-generated waterproof and anti-corrosion materials, comprising the following steps:

[0048] (P1) Select 21.0 parts of alkylsilane, 35.0 parts of silica fume, 42.9 parts of water, 0.1 part of calcium hydroxide, and 1.0 part of fumed silica according to parts by mass; the alkylsilane is n-octyltriethoxysilane.

[0049] (P2) Using silica fume as the main component, add alkyl silane, and stir at a low speed (500 rpm), so that the silica fume is completely infiltrated by the alkyl silane, and a mixture A is obtained;

[0050] (P3) Calcium hydroxide and fumed silica are mixed into water, and stirred to make calcium hydroxide and fumed silica suspension B;

[0051] (P4) Mix mixture A and suspension B, and shear emulsify at high speed (8000 rpm) in a high-speed disperser to obtain a composite "water-in-oil-in-water" (W / O / W) Creamy emulsion C with delicate and stable structure;

[0052] (P5) Silica fume in paste emulsion C forms hydro...

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Abstract

The invention discloses a self-waterproof corrosion-resistant material for being doped in concrete. The material is alkyl silanized silicon ash powder which is prepared by well mixing a mixture A with turbid liquid B, performing high-speed dispersion, cutting and emulsifying to obtain a pasty emulsion and dewatering the pasty emulsion, the mixture A is prepared from alkyl silane and silicon ash according to a mass ratio of (2.8-3.2):(4.5-5.5), the turbid liquid B is mixed turbid liquid containing calcium hydroxide and water, and a mass ratio of the mixture A to the turbid liquid B is (50-60):(40-50). The material prepared by a method is simple in preparation process, environment-friendly during preparation and low in cost, has large specific surface area, excellent hydrophobic performance, small adding amount, obvious surface beading effect and high durability, has little impact on strength of mortar and concrete, can endow waterproof mortar and self-waterproof corrosion-resistant concrete with excellent waterproofness and can fundamentally guarantee durability of buildings.

Description

technical field [0001] The invention relates to the technical field of survival processing of waterproof powder materials, in particular to a method for preparing alkyl silanized silica fume micropowder with hydrophobic properties after surface modification of alkyl silane. [0002] technical background [0003] Silica fume is the dust recovered from the flue gas of metal silicon or ferrosilicon alloy smelting. The average particle size of silica fume is 0.1-0.3 micron, and the specific surface area is 15000-28000m2 / kg. Its main component is silicon dioxide, with a content of 75% to 96%. The impurity components are alumina, sodium oxide, calcium oxide, magnesium oxide, iron oxide and activated carbon. [0004] At present, the utilization of silica fume at home and abroad is mainly for the concrete industry, refractory material additives, cement admixtures, etc., and its application range is very wide. From the concrete industry, it has been widely used in seaport projects,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B111/27C04B111/20
CPCC04B40/0039C04B2111/20C04B2111/27C04B24/42C04B18/146C04B22/064C04B14/06
Inventor 岑文杰王胜年熊建波范志宏
Owner CCCC FOURTH HARBOR ENG INST