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Internal and external concrete moisture migration inhibitor

A technology for migration inhibition and in-concrete, which is applied in the field of concrete admixtures to reduce surface energy, increase contact angle, and reduce drying shrinkage

Active Publication Date: 2018-07-31
YELLOW RIVER ENG CONSULTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a concrete internal and external moisture migration inhibitor for the problem of concrete moisture migration in the plastic stage, hardening stage and post-hardening stage

Method used

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  • Internal and external concrete moisture migration inhibitor
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The moisture migration inhibitor inside and outside the concrete of the present invention is prepared by the following method from raw materials muscovite powder, mordenite and kaolin:

[0023] (1) Substrate preparation: Grind the commercially available muscovite powder to 400 mesh, dry it for later use; grind the commercially available natural mordenite to 300 mesh, and the ammonium absorption value is not less than 130mmol / 100g; commercially available Kaolin is calcined at 750°C~800°C and ground to a fineness of 500 mesh, of which SiO 2 The content is not less than 50%, Al 2 o 3 The content is not less than 40%, and the specific surface area is not less than 15000m2 2 / kg. Take 60g of mica powder, 10g of zeolite powder, and 30g of kaolin powder after the above-mentioned treatment, and mix them uniformly in a high-speed powder mixer to prepare a base material;

[0024] (2) Ultrasonic treatment: Take 50g of the base material, add it into the mixture of isopropanol a...

Embodiment 2

[0029] The moisture migration inhibitor inside and outside the concrete of the present invention is prepared by the following method from raw material muscovite powder and mordenite:

[0030] (1) Substrate preparation: commercially available muscovite powder is ground to 400 mesh, dried for later use; commercially available natural mordenite is ground to 300 mesh, and the ammonium absorption value is not less than 130mmol / 100g. Take 70g of treated mica powder and 30g of zeolite powder, mix them evenly in a high-speed powder mixer, and prepare them as substrates;

[0031] (2) Ultrasonic treatment: Take 50g of the base material, add it into the mixture of isopropanol and n-butanol (volume ratio 1:1), ultrasonically treat for 10min, and then magnetically stir for 10min;

[0032] (3) Modification treatment: Slowly add 4ml of KH-550 silane coupling agent with a pipette gun under the state of magnetic stirring, and continue to stir for 30 minutes; appropriately increase the speed of...

Embodiment 3

[0036]The moisture migration inhibitor inside and outside the concrete of the present invention is prepared by the following method from raw material muscovite powder and commercially available kaolin:

[0037] (1) Substrate preparation: commercially available muscovite powder, ground to 1000 mesh, dried for later use; commercially available kaolin was calcined at 750°C to 800°C, and ground to a fineness of 500 mesh, of which SiO 2 The content is not less than 50%, Al 2 o 3 The content is not less than 40%, and the specific surface area is not less than 15000m2 2 / kg. Take 50g of mica powder and 50g of kaolin powder after the above treatment, and mix them uniformly in a high-speed powder mixer to prepare a base material;

[0038] (2) Ultrasonic treatment: Take 50g of the base material, add it into the mixture of isopropanol and n-butanol (volume ratio 1:1), ultrasonically treat for 10min, and then magnetically stir for 10min;

[0039] (3) Modification treatment: Slowly add...

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Abstract

The invention discloses an internal and external concrete moisture migration inhibitor. A preparation method of the internal and external concrete moisture migration inhibitor comprises the followingsteps: firstly, specially treating phlogopite / muscovite powder, clinoptilolite / mordenite powder and kaolin powder; mixing uniformly according to a ratio of (50-70):(0-30):(0-50), adding a mixed solution of isopropanol and n-butyl alcohol, and performing ultrasonic treatment; adding a proper amount of a silane coupling agent while magnetically stirring, slowly adding a proper amount of distilled water below the liquid level of the solution, slowly adding a methyl silicone oil modifier at a constant speed, and magnetically stirring for 1h; drying slurry, grinding and sieving to obtain a finishedmoisture migration inhibitor product. The moisture migration inhibitor prepared with the preparation method provided by the invention is low in cost of used raw materials, simple in preparation method and outstanding in water blocking effect.

Description

technical field [0001] The invention relates to a concrete admixture, in particular to an inhibitor of moisture migration inside and outside concrete in the plastic stage, hardening stage and post-hardening stage. Background technique [0002] During the construction process, the process of concrete from adding water to mixing can be divided into three stages: plastic stage, hardening stage and post-hardening stage. The concrete in the plastic stage must meet the workability requirements, the concrete in the hardening stage must meet the requirements of continuous strength growth and crack resistance, and the concrete in the hardened stage must meet the requirements of strength and durability. Therefore, the improvement of concrete performance should be considered around the whole life process of concrete. [0003] After concrete is poured, due to bleeding and poor humidity, the internal moisture evaporates into the air. If the moisture volatilization rate of the concrete ...

Claims

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Application Information

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IPC IPC(8): C04B24/42
CPCC04B40/0042C04B14/20C04B14/047C04B14/106C04B24/026C04B24/42C04B2103/0083C04B2103/65C04B2111/00275C04B2111/27C04B24/02C04B20/023C04B20/04C04B14/041C04B14/042C04B14/045C04B40/0046
Inventor 张金良苏茂林尚宏琦吴法辰景来红毛文然杨林陈学理
Owner YELLOW RIVER ENG CONSULTING
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