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Nano-silica modified geopolymer anticorrosive mortar and preparation method thereof

A nano-silica, geopolymer technology, applied in solid waste management, climate sustainability, sustainable waste treatment, etc., can solve the problems of weak acid corrosion resistance, easy cracking, and low service life of cement mortar

Active Publication Date: 2021-04-13
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, anti-corrosion building materials commonly used in hydrological engineering mainly include anti-corrosion coatings and anti-corrosion mortars. The former is used as a protective layer in the form of a coating overlay, and its own durability is insufficient, and its service life is much lower than that of the engineering buildings to be protected; the latter is generally It is polymer-modified portland cement mortar or high-alumina cement system anti-corrosion mortar, which has the problem of easy cracking after stress shrinkage, and the acid corrosion resistance of cement mortar is relatively weak

Method used

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  • Nano-silica modified geopolymer anticorrosive mortar and preparation method thereof
  • Nano-silica modified geopolymer anticorrosive mortar and preparation method thereof
  • Nano-silica modified geopolymer anticorrosive mortar and preparation method thereof

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preparation example Construction

[0019] The present invention also provides a preparation method for the above-mentioned nano-silica modified high-performance geopolymer anti-corrosion mortar, which includes: first mixing fly ash, metakaolin, nano-silica, polycarboxylate water reducer, expansion agent and Put the water into the mixer, stir at a speed of 60-120r / min for 3-5min, then add sodium silicate, water-based epoxy resin emulsion, and water-based epoxy curing agent, increase the speed to 1000r / min and continue stirring for 2-3min, then Add quartz sand and continue stirring at a speed of 60-120r / min for 1-2min, maintain a stirring speed of 60-120r / min, and finally add polyvinyl alcohol fiber and stir for 2-3min to fully mix well.

[0020] Analyzed from the functional mechanism, compared with the prior art, the present invention has the advantages of:

[0021] (1) The geopolymer is a kind of AlO 4 and SiO 4 An inorganic polymer with a three-dimensional network structure composed of tetrahedral structural...

Embodiment 1

[0028] The weight ratio of each component of a nano-silica modified high-performance geopolymer anti-corrosion mortar provided by the invention is:

[0029]

[0030] Put fly ash, metakaolin, nano-silica, polycarboxylate superplasticizer, expansion agent and water into the mixer, stir at a speed of 60-120r / min for 3-5min, then add sodium water glass, water-based Epoxy resin emulsion, water-based epoxy curing agent, increase the speed to 1000r / min and continue to stir for 2-3 minutes, then add quartz sand and continue to stir at 60-120r / min for 1-2min, maintain the stirring speed of 60-120r / min and finally add Stir the polyvinyl alcohol fiber for 2 to 3 minutes to mix well and evenly.

Embodiment 2

[0032] The weight ratio of each component of a nano-silica modified high-performance geopolymer anti-corrosion mortar provided by the invention is:

[0033]

[0034]

[0035] Put fly ash, metakaolin, nano-silica, polycarboxylate superplasticizer, expansion agent and water into the mixer, stir at a speed of 60-120r / min for 3-5min, then add sodium water glass, water-based Epoxy resin emulsion, water-based epoxy curing agent, increase the speed to 1000r / min and continue to stir for 2-3 minutes, then add quartz sand and continue to stir at 60-120r / min for 1-2min, maintain the stirring speed of 60-120r / min and finally add Stir the polyvinyl alcohol fiber for 2 to 3 minutes to mix well and evenly.

[0036]A nano-silica-modified high-performance polymer anti-corrosion mortar prepared in the above-mentioned embodiments of the present invention has higher mechanical properties, cohesiveness, impermeability, and resistance to acid, alkali and salt corrosion compared with the prior...

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Abstract

The invention discloses nano-silica modified geopolymer anticorrosive mortar and a preparation method thereof. The anticorrosive mortar comprises the following components: fly ash, metakaolin, modified sodium water glass, nano silica, a water-borne epoxy resin emulsion, a water-borne epoxy curing agent, hard basalt staple fibers, polyvinyl alcohol fibers, a polycarboxylate superplasticizer, an expanding agent, quartz sand and water. The nano-silica modified geopolymer anticorrosive mortar and the preparation method thereof provided by the invention have the performance characteristics of water resistance, permeability resistance, high strength, crack resistance, acid resistance, salt and alkali corrosion resistance, high cohesiveness and the like; and the nano-silica modified geopolymer anticorrosive mortar can be used for waterproof, crack-resistant and corrosion-resistant hydrological engineering such as foundation engineering facades in saline-alkali areas, piers and dams, ports and piers, building outer walls and roofs in acid rain areas and the like.

Description

technical field [0001] The invention relates to a geopolymer anticorrosion mortar and a preparation method thereof, in particular to a nano silicon dioxide modified geopolymer anticorrosion mortar and a preparation method thereof. Background technique [0002] Anti-corrosion building materials are widely used in emerging marine engineering, modern transportation, energy industry, large-scale industrial enterprises and municipal facilities, and their corrosion and aging properties are getting more and more attention. The anti-corrosion performance of building materials directly affects engineering Building longevity and safety. [0003] At present, anti-corrosion building materials commonly used in hydrological engineering mainly include anti-corrosion coatings and anti-corrosion mortars. The former is used as a protective layer in the form of a coating overlay, and its own durability is insufficient, and its service life is much lower than that of the engineering buildings t...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B111/20
CPCC04B28/006C04B2201/10C04B2201/50C04B2111/20C04B18/08C04B14/106C04B22/00C04B14/06C04B24/281C04B14/46C04B16/0641C04B14/062C04B2103/0068C04B2103/302Y02W30/91
Inventor 季晓丽李熙钟世云
Owner TONGJI UNIV
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