Nitrogen Dissolved Water Concrete Neutralization Resistance
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Solution Overview
Problem
Reinforced concrete structures face deterioration due to carbonation and oxidation, leading to neutralization and corrosion of reinforcing rods, which existing methods have not adequately addressed.
Innovation Solution
A concrete manufacturing method involving the substitution of oxygen and carbon dioxide in water with nitrogen gas to create nitrogen dissolved water, which is then used to produce ready-mixed concrete with improved neutralization and oxidation resistance properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nitrogen gas is injected into water to substitute dissolved oxygen and carbon dioxide with nitrogen, then the neutralization resistance and oxidation resistance of concrete are improved, but the manufacturing process complexity increases
Solution Approach 1:
The patent applies preliminary action by treating the water with nitrogen gas injection before the concrete mixing process. The nitrogen dissolved water is prepared in advance and then used as mixing water, allowing the beneficial effects to be achieved without modifying the core concrete mixing process. This resolves the contradiction by implementing the improvement measure in a preliminary stage rather than during the main manufacturing process.
Solution Approach 2:
The patent changes the chemical composition parameters of the mixing water by substituting dissolved oxygen and carbon dioxide with nitrogen gas. This parameter change in the water composition leads to improved neutralization and oxidation resistance of the concrete while maintaining the standard concrete mixing process, thus resolving the contradiction between improved reliability and process complexity.
2Quantity of substance
If nitrogen gas is injected into water to create nitrogen dissolved water, then the dissolved oxygen and carbon dioxide levels are reduced, but the manufacturing time and process steps increase
Solution Approach 1:
The nitrogen gas injection into water is performed as a preliminary treatment step before concrete mixing. The nitrogen dissolved water is prepared in advance and can be stored or used immediately, allowing the water treatment process to occur separately from the time-critical concrete mixing operation. This resolves the contradiction by decoupling the time-consuming treatment step from the main manufacturing process.
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 method significantly reduces carbon dioxide and oxygen levels in the concrete, thereby enhancing the neutralization and oxidation resistance of reinforced concrete structures, preventing or reducing deterioration and corrosion.
Implementation Method 1
a step of substituting oxygen and carbon dioxide that are dissolved in water for nitrogen by injecting nitrogen gas into the water, to generate nitrogen dissolved water
Data Source
AI summary
Provided are a concrete manufacturing method capable of preventing neutralization of concrete and oxidation of a reinforcing rod in reinforced concrete, and a method for manufacturing a reinforced concrete structure using the same. The concrete manufacturing method uses nitrogen dissolved water and is characterized by including: a step of generating nitrogen dissolved water by injecting nitrogen gas into water to replace oxygen and carbon dioxide dissolved in the water with nitrogen; and a step of generating a ready-mixed concrete by kneading the nitrogen dissolved water, cement, an aggregate, and an admixture. The method for manufacturing a reinforced concrete structure is characterized by forming a reinforced concrete structure using a ready-mixed concrete manufactured by a concrete manufacturing method using nitrogen dissolved water.