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Zeolite loaded chloride ion curing agent and preparation method and application thereof

A supported and chloride ion technology, applied in the field of zeolite-supported chloride ion curing agent and its preparation, can solve the problems of low curing efficiency of free chloride ions, improve the ability of curing free chloride ions, reduce corrosion and prolong service life Effect

Active Publication Date: 2019-01-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention aims to propose a zeolite-loaded chloride ion curing agent to solve the low problem of free chloride ion curing efficiency in existing concrete

Method used

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  • Zeolite loaded chloride ion curing agent and preparation method and application thereof
  • Zeolite loaded chloride ion curing agent and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0038] A zeolite-loaded chloride ion curing agent, prepared by parts by weight from 100-120 parts of dry zeolite, 160-200 parts of saturated barium acetate solution and 3-5 parts of triisopropanolamine solution . Among them, in terms of mass fraction, the chemical composition of zeolite includes 60-70% silica, 10-18% alumina; the bulk density of zeolite is not less than 1100kg / m 3 The fineness of the zeolite is less than 10% of the sieve residue of the 80 μm square hole sieve; the water demand ratio of the zeolite is not more than 125%; the concentration of the triisopropanolamine solution is 0.1-0.3g / mL.

[0039] The zeolite-loaded chloride ion curing agent of this embodiment uses barium acetate as the main active ingredient, which can be combined with the hydration products of sulfur-containing elements in cement monosulfide type calcium sulfoaluminate hydrate (AFm) and trisulfide type sulfur hydrate Calcium aluminate (AFt) reacts to form barium sulfate precipitate, thereby...

Embodiment 2

[0052] A zeolite-loaded chloride ion curing agent, which is specifically prepared through the following steps:

[0053] 1) At normal temperature, by weight, 100 parts of dry zeolite is placed in a vacuum container for vacuum treatment for 20 minutes, wherein the absolute pressure of the vacuum container is reduced to 1-5KPa within 5 minutes, and then, 160 parts of saturated acetic acid is injected Barium solution, continue vacuum treatment for 10min, after the vacuum treatment is finished, let it stand at normal pressure for 30min to obtain the zeolite / barium acetate composite material solution;

[0054] 2) In an oven at 50°C, dry the zeolite / barium acetate composite material solution to evaporate the water to form a barium acetate supersaturated solution. At this time, continue to dry, and the barium acetate is crystallized and distributed inside the zeolite to obtain a zeolite / barium acetate composite material ;

[0055] 3) While stirring, use a sprayer to evenly spray 5 pa...

Embodiment 3

[0058] A zeolite-loaded chloride ion curing agent, which is specifically prepared through the following steps:

[0059] 1) At normal temperature, by weight, 120 parts of dry zeolite is placed in a vacuum container for vacuum treatment for 30 minutes, wherein the absolute pressure of the vacuum container is reduced to 1-5KPa within 5 minutes, and then, 200 parts of saturated acetic acid is injected Barium solution, continue to vacuum treatment for 15min, after the vacuum treatment is finished, let stand at normal pressure for 30min to obtain zeolite / barium acetate composite material solution;

[0060] 2) In an oven at 70°C, dry the zeolite / barium acetate composite material solution to evaporate the water to form a barium acetate supersaturated solution. At this time, continue to dry, and the barium acetate is crystallized and distributed inside the zeolite to obtain a zeolite / barium acetate composite material ;

[0061] 3) While stirring, use a sprayer to evenly spray 3 parts ...

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Abstract

The invention provides a zeolite loaded chloride ion curing agent and a preparation method and application thereof. The zeolite loaded chloride ion curing agent is prepared from the following components in parts by weight, 100-120 parts of dried zeolite, 160-200 parts of saturated barium acetate solution and 3-5 parts of triisopropanolamine solution. According to the zeolite loaded chloride ion curing agent, the zeolite is adopted as a carrier, and an active substance barium acetate is loaded into the zeolite, so that the zeolite loaded chloride ion curing agent provided by the invention exists stably in early-age cement concrete slurry, and setting time and the working performance of cement concrete are not affected; moreover, along with cement hydration, the barium acetate in the zeoliteloaded chloride ion curing agent dissolves in a pore solution of the cement concrete slowly, transformation of hydrates of cement hydration products AFm and AFt and the like into stable Friedel saltis promoted, and the content of free chloride ions in the concrete is reduced, so that the zeolite loaded chloride ion curing agent provided by the invention has a higher chloride ion curing effect.

Description

technical field [0001] The invention relates to the technical field of curing agents, in particular to a zeolite-loaded chloride ion curing agent and its preparation method and application. Background technique [0002] Reinforced concrete, due to its low cost, strong durability, and wide source of materials, has become an indispensable material in the process of infrastructure construction. Marine concrete refers to the concrete serving in the marine environment. Since seawater contains a large amount of chloride ions, it can migrate to the interior of the concrete through diffusion and reach the surface of the steel bar, induce corrosion of the steel bar, generate expansion stress, and crack the concrete, eventually causing Structural damage. [0003] For the problem of chloride ion corrosion in reinforced concrete structures, the current solutions mainly include the use of epoxy steel bars, stainless steel bars, surface coatings, cathodic protection, and rust inhibitors....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12
CPCC04B40/0039C04B14/047C04B24/04C04B24/122
Inventor 马保国吕周岭刘晓海谭洪波陈偏张挺戚华辉
Owner WUHAN UNIV OF TECH