Superhydrophobic Grouting Material for Mudstone Reinforcement
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Solution Overview
Problem
Traditional grouting materials fail to reinforce tunnel surrounding rocks in abandoned mines effectively when exposed to circulating water, leading to water leakage and instability, which is critical for pumped storage power stations requiring airtight reservoirs.
Innovation Solution
A grouting material composed of cement, water, superfine micronized powder, water reducer, fiber, urea-formaldehyde resin, and waterborne polyurethane is developed, which imparts superhydrophobic properties and enhanced stability to mudstone, preventing water penetration and ensuring the structural integrity of underground reservoirs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional grouting materials are used to reinforce tunnel surrounding rocks, then the safety and stability of the tunnel surrounding rock is improved, but water penetration occurs and the mudstone skeleton deteriorates under circulating water conditions
Solution Approach 1:
The patent uses a composite grouting material system comprising cement, silane-modified binder, superhydrophobic particles (fluorinated silica), and polymeric additives. This composite formulation combines the binding strength of cement with the water-repelling properties of fluorinated silica and silane modification, creating a material that simultaneously achieves mechanical reinforcement and water resistance in mudstone tunnel surrounding rocks
Solution Approach 2:
The patent modifies the chemical and physical parameters of the grouting material by incorporating silane-modified binders that alter the surface energy characteristics, and superhydrophobic particles that change the wettability parameters. These parameter changes enable the material to maintain structural integrity while preventing water penetration under circulating water conditions
2Stability of the object's composition
If the tunnel surrounding rock is reinforced to ensure structural stability, then the safety is improved, but water leakage occurs compromising the airtightness required for pumped storage
Solution Approach 1:
The patent introduces superhydrophobic fluorinated silica particles and silane-modified binders as intermediary substances between the grouting material and water. These intermediaries create a hydrophobic barrier layer that prevents direct water contact with the mudstone skeleton, eliminating water leakage while maintaining structural stability for pumped storage airtightness
Solution Approach 2:
The patent changes the surface energy parameters of the grouting material through silane modification and superhydrophobic particle incorporation, transforming the material from water-permeable to water-repelling. This parameter change eliminates water leakage harmful effects while preserving the structural stability needed for pumped storage reservoir airtightness
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 grouting material effectively prevents water leakage and maintains structural stability, enabling efficient water pumping and energy storage in underground spaces by forming a hydrophobic layer and interlocking mesh structures that enhance bonding and mechanical resistance.
Implementation Method 1
the grouting material to have superhydrophobic properties while being resistant to the impact of circulating water
Implementation Method 2
forming a hydrophobic layer and interlocking mesh structures that enhance bonding and mechanical resistance
Implementation Method 3
grouting material composed of cement, water, superfine micronized powder, water reducer, fiber, urea-formaldehyde resin, and waterborne polyurethane
Data Source
AI summary
Disclosed are a grouting material for modifying mudstone, a preparation method and an application thereof, belonging to the technical field of material science and geotechnical engineering. The grouting material for modifying mudstone includes the following raw materials: cement, water, superfine micronized powder, water reducer, silane, fiber, diatomite, urea-formaldehyde resin and waterborne polyurethane. The preparation method of the grouting material for modifying mudstone includes steps of: (1) weighing the raw materials in parts by weight, mixing water of 40% of a total amount of water with water reducer, superfine micronized powder, fiber and diatomite, stirring to obtain a material A; (2) adding silane, urea-formaldehyde resin, waterborne polyurethane and residual water into the material A, obtaining a material B after continuous stirring; and (3) adding cement into the material B, and uniformly stirring to obtain the grouting material for modifying mudstone.