Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of concrete protective agent, concrete protective film and preparation method thereof

A technology for concrete and protective agent, applied in the field of concrete protective film and its preparation, and concrete protective agent, can solve the problems of slow polycondensation reaction of siloxane, accelerated corrosion, easy peeling, etc., and achieves improved resistance to sulfate and chloride ion corrosion. performance, the effect of improving waterproof performance

Active Publication Date: 2019-04-19
SHENZHEN UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical, physical, and chemical compatibility between organic silicon materials and inorganic materials in concrete is not good, and the polycondensation reaction speed of siloxane is slow at room temperature, and silica gel is formed during use. Shrinkage, strong stress damage occurs in three-dimensional directions in the micropores of the stone
The above characteristics make silicone film-forming materials easy to peel off, and their sensitivity to ultraviolet light will also reduce their service life
[0005] However, the inorganic protective material reacts with the concrete itself to form soluble salts, which accelerates corrosion, and has poor waterproof performance and resistance to sulfate and chloride ion corrosion; the bond with concrete is relatively weak, and the reaction products will block the pores on the concrete surface and inhibit Further penetration of the reinforcing agent is prevented, resulting in easy peeling of the protective material

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] The preparation method of the concrete protective agent is not particularly limited in the present invention, and the technical scheme for preparing the composition well-known to those skilled in the art can be adopted. In the present invention, the preparation of the concrete protective agent preferably includes the following steps: mixing water and oxalic acid to obtain an oxalic acid solution; mixing the oxalic acid solution with a defoamer and a film-forming agent to obtain a concrete protective agent.

[0024] In the present invention, there is no special limitation on the mixing operation, and a mixing technical solution well known to those skilled in the art can be used. In the present invention, the mixing is preferably carried out under stirring conditions; the stirring speed is preferably 170-190 r / min, and the stirring time is preferably 1-3 minutes.

[0025] The present invention also provides a method for preparing a concrete protective film. The concrete p...

Embodiment 1

[0031] At room temperature, pour 200g of water into 12.8g of oxalic acid dihydrate, stir for 2min, and rotate at a speed of 180r / min.

[0032] Then add 2.128g of chondroitin sulfate into the mixed solution, and stir for another 2min at the same speed.

[0033] Add 1.2 g of higher alcohol fatty acid ester complex and 1.0 g of polyoxyethylene glyceryl ether into the mixed solution, stir for 1 min at a speed of 180 r / min, and obtain a concrete protective agent.

Embodiment 2

[0035] Take 8g of the concrete protective agent prepared in Example 1 and paint it on the hardened concrete surface. After three layers of paint, dry the test piece at 30° C. for 1 hour.

[0036] That is, the concrete protective film is obtained.

[0037] The film thickness of the concrete protective film prepared in this embodiment is 20 μm; soaked in 5% magnesium sulfate solution for 28 days, the erosion depth is 0.1mm, soaked in water after drying, the saturated water absorption rate is 3.8%; in 3% sodium chloride solution After soaking for 28 days, the erosion depth is 0.8mm. After drying, soak in water. The saturated water absorption rate is 3.8%, and the peel strength is 5.1N.

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
Thicknessaaaaaaaaaa
Film thicknessaaaaaaaaaa
Peel strengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a concrete protective agent, a concrete protective film and a preparation method thereof. The concrete protective agent provided by the invention comprises the following components: water, oxalic acid, defoamer and film-forming agent. When the concrete protective agent provided by the invention is used for concrete protection, the oxalic acid in the protective agent can react with the calcium ions in the concrete, and generate calcium oxalate monohydrate in situ inside and on the surface of the concrete, so as to obtain a protective film with strong bonding force with the concrete; The film-forming agent in the protective agent serves as a template to regulate the growth of calcium oxalate crystals, improving the waterproof performance and corrosion resistance of sulfate and chloride ions of the protective film. The preparation method provided by the invention is simple, practical and suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of engineering protective materials, in particular to a concrete protective agent, a concrete protective film and a preparation method thereof. Background technique [0002] Reinforced concrete is the most important building material in construction engineering, and it is widely used in industry, civil, transportation and various buildings. However, buildings made of reinforced concrete are often corroded by corrosive media during use. Therefore, if no anti-corrosion measures are taken for structural materials during construction, the corrosive media may damage the building structure and even make it lose its use value. [0003] Surface treatment of concrete is one of the effective ways to improve the durability of concrete. Surface protection materials can form an isolation layer between concrete and the external environment, and prevent or delay the intrusion of harmful substances such as water and chlori...

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
IPC IPC(8): C04B41/63
CPCC04B41/4896C04B41/63C04B41/4803C04B41/46C04B41/47C04B41/4535C04B41/62C04B2111/2015C04B2111/27C04B41/009C04B28/02C04B41/4556C04B41/502C04B2103/0066C04B2103/50C04B41/4884C04B41/501
Inventor 丁铸田炳瑶王明燕周志伟孙晨
Owner SHENZHEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com