Addition combination agent of rapid powder repairing material and application of addition combination agent in cement concrete

A technology for cement concrete and repairing material, applied in the application of cement concrete, in the field of adding and combining agent of powder quick repairing material, can solve the problem of long curing period of ordinary Portland cement repairing mortar, reducing the impermeability and phase difference of repairing system. Capacitive adverse effects and other problems, to achieve the effect of accelerating the initial setting time, enhancing the compressive strength, and promoting early hydration

Active Publication Date: 2022-03-15
绵阳市安州区荣盛建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its large shrinkage rate, especially in dry and hot environments, has an adverse effect on compatibility and indirectly reduces the impermeability of the entire repair sys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of additive composition of powder fast repairing material and its application in cement concrete, comprising:

[0022] Step 1, the preparation method of modified nano silicon dioxide is:

[0023] Ⅰ. Nano-silica activation treatment: mix nano-silica with 50% sodium hydroxide solution at a mass ratio of 1:300, stir at 75°C for 2 hours, wash, and centrifuge; the treated nano-silica Silicon and ethanol solution with a mass fraction of 75% are mixed according to a mass ratio of 1:200, and stirred for 1 h; silane coupling agent KH-560 is added to the mixed solution, and the amount of silane coupling agent KH-560 is the mass of nano-silica 3%, adding oxalic acid solution to adjust the pH value to 3.5, stirring at 75°C for 2h, centrifuging and drying to obtain activated nano silicon dioxide.

[0024] Ⅱ. Carboxymethyl cellulose wrapped activated nano-silica: add a certain amount of carboxymethyl cellulose into distilled water, stir at 80°C until carboxymethyl cellulose i...

Embodiment 2

[0029] A kind of additive composition of powder fast repairing material and its application in cement concrete, comprising:

[0030] Step 1, the preparation method of modified nano silicon dioxide is the same as in Example 1.

[0031] Step 2, weighing aluminum sulfate 3000g, iron sulfate 350g, lithium sulfate 170g, magnesium oxide 180g, magnesium fluorosilicate 200g, modified nano silicon dioxide 800g; aluminum sulfate, iron sulfate, lithium sulfate, magnesium oxide, fluorosilicate Magnesium and modified nano-silica are placed in a ball mill tank with a ball-to-material ratio of 20:1. Under the protection of argon, ball mill at 300 rpm for 2 hours. The particle size of the powder after grinding is 200 mesh; Add compound.

[0032] Step 3. Mix the additive combination of powder quick repair material with water and diethanolamine in a mass ratio of 400:200:25, and then mix the mixture with Portland cement in a mass ratio of 6:100; according to GB / T35159 -Tested under the experi...

Embodiment 3

[0034] A kind of additive composition of powder fast repairing material and its application in cement concrete, comprising:

[0035] Step 1, the preparation method of modified nano silicon dioxide is the same as in Example 1.

[0036] Step 2, weighing aluminum sulfate 3000g, iron sulfate 400g, lithium sulfate 200g, magnesium oxide 200g, magnesium fluorosilicate 200g, modified nano silicon dioxide 800g; aluminum sulfate, iron sulfate, lithium sulfate, magnesium oxide, fluorosilicate Magnesium and modified nano-silica are placed in a ball mill tank with a ball-to-material ratio of 20:1. Under the protection of argon, ball mill at 300 rpm for 2 hours. The particle size of the powder after grinding is 200 mesh; Add compound.

[0037] Step 3. Mix the additive combination of powder quick repair material with water and diethanolamine in a mass ratio of 400:200:30, and then mix the mixture with Portland cement in a mass ratio of 6:100; according to GB / T35159 -Tested under the experime...

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Abstract

The invention discloses an addition combination agent of a rapid powder repairing material and application of the addition combination agent in cement concrete. The addition combination agent is prepared from 260-300 parts of aluminum sulfate, 30-40 parts of ferric sulfate, 15-20 parts of lithium sulfate, 15-20 parts of magnesium oxide, 20-30 parts of magnesium fluosilicate and 80-150 parts of modified nano silicon dioxide. The materials are placed in a ball milling tank, the ball-to-material ratio is (20-30): 1, ball milling is conducted for 1-2 h at 300-500 rpm under the protection of argon, the particle size of ground powder is 200-300 meshes, and the additive combination agent of the rapid powder repairing material is obtained; the method comprises the following steps: mixing the additive combination agent of the powder rapid repairing material with water and diethanol amine according to a mass ratio of (400-600): (200-300): (20-30), and then mixing the mixture with cement according to a mass ratio of (6-8): 100. According to the invention, aluminum sulfate is taken as a main component and is combined with other components, and a nano silicon dioxide material with a huge specific surface area can provide crystallization nucleation points for hydration products of cement, has an effect of promoting early hydration, can fill nano-scale pores of a cement material, improves the compactness of an internal structure and meets the requirements of strength and durability of the cement.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a combination agent for powder quick repair material and its application in cement concrete. Background technique [0002] With the development of our country's economy, infrastructure construction is becoming more and more perfect, and facilities such as tunnels, bridges, and highways are also being built continuously, which provides convenience for people and power for the economy. In all kinds of infrastructure construction, due to unreasonable concrete structure design, construction defects, environmental erosion, improper maintenance and other reasons, a large part is in urgent need of reinforcement and repair. Therefore, the research and development of cement concrete repair materials is necessary. [0003] Traditional cement concrete repair materials can be divided into inorganic and organic types, among which inorganic repair materials are widely u...

Claims

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Application Information

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IPC IPC(8): C04B22/14C04B28/04C04B24/38C04B22/06
CPCC04B40/0039C04B28/04C04B24/383C04B22/06C04B2201/50C04B22/148C04B22/149C04B22/147C04B22/066C04B22/124C04B24/122Y02W30/91
Inventor 李浩李昌荣王小红
Owner 绵阳市安州区荣盛建材有限公司
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