Reactive Waterproofing Grout Strip for Concrete Joint Sealing
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Solution Overview
Problem
Existing methods for preventing water leakage through concrete construction joints, such as membranes and porous liners, are ineffective as they can become brittle, allow water to seep through capillaries, or fail due to swelling and shrinkage, necessitating an improved solution that is easy and quick to implement.
Innovation Solution
A method and system utilizing a continuous longitudinal cementitious and reactive waterproofing grout strip applied to the top surface of a concrete joint area, combined with a cementitious and reactive waterproofing slurry, which forms crystalline growth to block water migration, even in cracked concrete, using materials like Krystol or Xypex.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a nonporous membrane is used to prevent water leakage, then water migration is blocked, but water can still seep into capillaries and cracks in the surrounding concrete
Solution Approach 1:
The patent changes the physical-chemical state of the concrete surface by applying a slurry containing crystalline formers that react with moisture to form insoluble crystals. This transforms the porous concrete surface into a crystalline-coated barrier that blocks capillary pores, addressing the limitation of membrane systems that cannot prevent water seepage into concrete microstructure
Solution Approach 2:
The invention creates a composite waterproofing system combining a nonporous membrane with a crystalline-coated concrete surface. The membrane provides macro-level water barrier while the crystalline formation within concrete pores provides micro-level protection, together forming a multi-scale defense against water infiltration
2Reliability
If a porous liner is used to trap and absorb moisture, then water migration is reduced, but the liner swells and shrinks causing failure
Solution Approach 1:
The crystalline waterproofing system is self-forming and self-maintaining. Crystals form automatically when moisture is present and continue to grow to fill voids. The system requires no active maintenance and automatically responds to water presence, eliminating the need for porous liners that undergo problematic swelling and shrinking cycles
Solution Approach 2:
The patent transforms the concrete pore structure from a porous state to a crystalline-filled state through chemical reaction. This parameter change creates a stable, non-porous internal structure that does not swell or shrink, replacing the unstable porous liner system
3Reliability
If membranes are embedded in concrete joints, then water barrier is formed, but the membrane becomes brittle and cracks allowing water passage
Solution Approach 1:
The patent changes the material properties of the concrete surface layer through crystalline formation, creating a flexible, integral waterproofing layer that moves with the concrete substrate. This eliminates the brittleness problem of embedded membranes by making the waterproofing layer part of the concrete itself rather than a separate vulnerable component
Solution Approach 2:
The invention merges the waterproofing function directly into the concrete material through crystalline formation within the pores and capillaries. This integration eliminates the interface between separate membrane and concrete, preventing delamination and cracking that occur with embedded membranes
4Reliability
If conventional waterproofing methods are used, then water leakage is prevented, but the application process is complex and time-consuming
Solution Approach 1:
The crystalline waterproofing components are pre-mixed into the concrete batch or applied as a ready-to-use slurry before the concrete is placed. This preliminary preparation eliminates complex field assembly operations and allows the waterproofing function to be achieved through standard concrete placement and curing processes
Solution Approach 2:
The crystalline waterproofing slurry serves multiple functions simultaneously: it acts as a surface treatment, a pore-filling agent, and a long-term maintenance system. This multi-functionality eliminates the need for separate waterproofing installation steps, simplifying the overall construction 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
Effectively prevents water leakage by forming crystalline growth that blocks water migration through capillaries and cracks, providing a durable and self-sealing solution that is easy to apply and maintain.
Implementation Method 1
forming crystalline growth to block water migration
Implementation Method 2
cementitious and reactive waterproofing slurry which forms crystalline growth
Data Source
AI summary
A method and system for constructing a concrete waterstop joint between first and second concrete portions. The method may include applying a continuous longitudinal cementitious and reactive waterproofing grout strip to a joint area of the first concrete portion and then forming the second concrete portion over the grout strip. The system may include a first concrete portion having a joint area, a continuous cementitious and reactive waterproofing longitudinal grout strip connectable to the joint area, and a second concrete portion formable over the grout strip. There is also provided a use of a cementitious and reactive waterproofing grout strip in the construction of a concrete waterstop joint between first and second concrete portions.