Low-Temperature Cross-Section Repair Material for Concrete
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current cross-section repair materials for concrete structures face challenges in curing at extremely low temperatures, such as -25°C, leading to prolonged curing times and insufficient compressive strength, while also posing safety concerns with the use of ultraviolet light curing and inadequate workability.
Innovation Solution
A low-temperature-curable cross-section repair material comprising a radical polymerizable resin composition, cobalt metal salt, hydroxyl group-containing aromatic tertiary amine, organic peroxide, and inorganic filler, which includes specific components like vinyl ester resin, urethane (meth)acrylate resin, and polyester (meth)acrylate resin, along with radical polymerizable unsaturated monomers, to facilitate rapid curing and enhanced strength development at low temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional concrete repair materials are used at extremely low temperatures, then the material can be applied, but the curing time becomes excessively long and compressive strength is insufficient
Solution Approach 1:
The patent changes the chemical composition parameters of the repair material by incorporating specific low-temperature-curable resins (epoxy resin, polyester resin, or vinyl ester resin) and reactive diluents with low freezing points. This compositional parameter change enables the material to maintain workability and achieve proper curing at extremely low temperatures down to -25°C, directly resolving the contradiction between low curing temperature and excessive curing time
Solution Approach 2:
The patent creates a composite repair material system combining multiple components: base resin (epoxy/polyester/vinyl ester), reactive diluent, curing agent, and filler. This composite formulation synergistically enables low-temperature curing while maintaining adequate compressive strength and reducing curing time, addressing both the temperature and time constraints simultaneously
2Temperature
If resin-based cross-section repair material is used to enable low-temperature curing, then curing at -25°C becomes possible, but work safety deteriorates due to the need for ultraviolet light curing
Solution Approach 1:
The patent replaces the ultraviolet light curing mechanism with a chemical curing mechanism using reactive diluents and curing agents that can polymerize at low temperatures without requiring UV radiation. This substitution eliminates the safety hazards associated with UV exposure while maintaining the ability to cure at -25°C, resolving the contradiction between low-temperature capability and work safety
3Temperature
If floor resins in refrigerated warehouses are used to achieve low-temperature curing, then curing at extremely low temperatures is possible, but compressive strength characteristics become insufficient
Solution Approach 1:
The patent formulates a composite repair material combining specific base resins (epoxy/polyester/vinyl ester) with reactive diluents, curing agents, and fillers in optimized proportions. This composite structure provides both low-temperature curability and adequate compressive strength for concrete repair applications, distinguishing it from ordinary floor resins that lack the necessary strength characteristics
Solution Approach 2:
The patent adjusts the chemical composition parameters including resin type, diluent ratio, curing agent selection, and filler content to optimize both low-temperature curing performance and compressive strength. These parameter changes ensure the material meets the specific requirements for concrete cross-section repair at extremely low temperatures
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The material allows for rapid curing and excellent strength development at -25°C, improving workability and compressive strength, while ensuring safety and efficiency in concrete repair processes.
Implementation Method 1
a radical polymerizable resin composition (A), a cobalt metal salt (B), a hydroxyl group-containing aromatic tertiary amine (C-1)... an organic peroxide (D)... wherein the radical polymerizable resin composition (A) contains at least one radical polymerizable resin (A-1)
Implementation Method 2
a cobalt metal salt (B), a hydroxyl group-containing aromatic tertiary amine (C-1)... an organic peroxide (D)... wherein the radical polymerizable resin composition (A) contains at least one radical polymerizable resin (A-1)
Data Source
AI summary
Provided is a low-temperature-curable cross-section repair material which can be cured in a short period of time, even in extremely low temperature environments of -25°C, and which exhibits excellent workability and strength development. Also provided is a cross-section repairing method using the same. The low-temperature-curable cross-section repair material is characterized by: comprising 100 parts by of a radical polymerizable resin composition (A), 0.1-10 parts by of a hydroxyl group-containing aromatic tertiary amine (C-1), 0.1-10 parts by of an organic peroxide (D), and 1.0-500 parts by of an inorganic filler (E); and the radical polymerizable resin composition (A) comprising at least one type of radical polymerizable resin (A-1) selected from the group consisting of vinyl ester resins, urethane (meth)acrylate resins and polyester (meth)acrylate resins, and a radical polymerizable unsaturated monomer (A-2) having at least two or more (meth)acryloyl groups per molecule thereof.