Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of high-durability concrete in high-salt service state and preparation method thereof

A technology of durable concrete and service state, applied in the field of concrete, can solve the problems of reducing the stability and safety of structures, reducing the corrosion resistance of concrete, poor corrosion resistance of concrete, etc., and achieves high internal relative humidity and drying self-shrinking effect. Small, the effect of improving the impermeability

Active Publication Date: 2022-08-05
天津金隅混凝土有限公司 +1
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, many engineering projects will have relatively harsh natural conditions of high salt and high humidity. This natural condition of high salt and high humidity will cause strong erosion of concrete. If the corrosion resistance of concrete is poor, it will make concrete Corroded, posing a great threat to the safety of structures
The anti-corrosion ability of concrete generally has a great relationship with its anti-cracking ability. If the anti-cracking ability of concrete is poor, there will be different degrees of cracking after construction, and as the use time gets longer and longer, the cracks will gradually disappear. The width will continue to grow. These cracks provide a path for the penetration of chloride ions and sulfate ions, seriously reducing the corrosion resistance of concrete, causing serious corrosion of concrete, and greatly reducing the durability of concrete. stability and safety of the structure

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of high-durability concrete in high-salt service state and preparation method thereof
  • A kind of high-durability concrete in high-salt service state and preparation method thereof
  • A kind of high-durability concrete in high-salt service state and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0071] At a temperature of 20 °C, 8 mL of acrylic acid and 8 mL of distilled water were mixed and stirred, and then NaOH aqueous solution with a concentration of 20 wt% was slowly added for neutralization. The neutralization degree of the reaction system was controlled to be 84%, and then 0.008 mL of N,N-methylene was added. base bisacrylamide and 0.8g sepiolite, stir and react for 30min, then add 0.32mL composite initiator to the reaction system, react at 55℃ for 4h, then soak in methanol for washing to remove water-soluble oligomers, The uncrosslinked polymer and the unreacted monomer are then dried in an oven at 70° C. to a constant weight, and pulverized through a 60-mesh sieve to obtain a sepiolite composite superabsorbent resin.

[0072] The composite initiator includes 0.16 mL of L-ascorbic acid with a concentration of 0.5 wt % and 0.16 mL of hydrogen peroxide with a concentration of 0.35 wt %.

preparation example 2

[0074] At a temperature of 28 °C, 8 mL of acrylic acid and 9.6 mL of distilled water were mixed and stirred, and then slowly added NaOH aqueous solution with a concentration of 24 wt% for neutralization. Methylbisacrylamide and 2.4g of sepiolite were stirred and reacted for 40min, then 0.48mL of composite initiator was added to the reaction system, and the reaction was carried out at a temperature of 60°C for 5h, and then soaked in methanol for washing to remove water-soluble oligomers , uncrosslinked polymer and unreacted monomer, then dried in an oven at 70°C to constant weight, pulverized through a 60-mesh sieve, to obtain a sepiolite composite superabsorbent resin.

[0075] The composite initiator includes 0.218 mL of L-ascorbic acid with a concentration of 0.55 wt % and 0.262 mL of hydrogen peroxide with a concentration of 0.4 wt %.

preparation example 3

[0077] The difference from Preparation Example 1 is that after the composite initiator is added, 0.24 mL of an aqueous solution of polyvinyl alcohol with a concentration of 10 wt % is also added to the reaction system.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
lengthaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The application relates to the field of concrete, and specifically discloses a high-durability concrete in a high-salt service state and a preparation method thereof. The raw materials used in concrete include the following components: cement, mineral powder, fly ash, expansion agent, fine aggregate, red brick powder, coarse aggregate, water reducing agent, air-entraining agent, anti-corrosion rust inhibitor, water, superabsorbent resin , reinforced fiber, epoxy resin microcapsules; its preparation method is: S1. First, mix red brick powder and water to stand; S2. Mix and stir cement, mineral powder, fly ash, water and water reducing agent, and then Add the remaining raw materials except the epoxy resin microcapsules and continue to stir, and finally add the epoxy resin microcapsules and continue to stir. The concrete of the present application has higher crack resistance, penetration resistance and mechanical properties, thus higher durability and longer service life.

Description

technical field [0001] The present application relates to the field of concrete, and more particularly, to a high-durability concrete in a high-salt service state and a preparation method thereof. Background technique [0002] As the most widely used building material, cement concrete has the advantages of abundant raw materials, low cost, strong adaptability and convenient application. The cement concrete used in various engineering projects in my country reaches more than 2 billion cubic meters every year. [0003] At present, many engineering projects will have relatively harsh natural conditions of high salt and high humidity. Such natural conditions of high salt and high humidity will cause strong erosion of concrete. If the corrosion resistance of concrete is poor, it will make concrete Corrosion, posing a great threat to the safety of structures. The anti-corrosion ability of concrete generally has a great relationship with its anti-cracking ability. If the anti-crac...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B111/20C04B111/34
CPCC04B28/04C04B2111/20C04B2111/343C04B18/141C04B18/08C04B2103/302C04B22/066C04B14/06C04B14/02C04B24/34C04B2103/61C04B24/24C04B24/281C04B24/383C04B2103/0068C04B14/386C04B14/4643C04B14/42C04B18/16
Inventor 高中民段士常张晶晶张忍高瀛洲谷晓光陈军亮刘磊黄天勇
Owner 天津金隅混凝土有限公司