Hydroseeding Slurry for Erosion Control
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Solution Overview
Problem
Current hydroseeding products are challenging due to their hard, brick-like format requiring manual breaking, separation issues from water, clogging of equipment, and grass seeds floating rather than remaining well dispersed.
Innovation Solution
A hydroseeding substrate comprising mulch and a cover composition of bentonite clay and cellulosic water-dispersible polymer or starch, optionally including fiber, colorant, essential oil, and soda ash, which forms a slurry with seed and water for improved application and erosion control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If hydroseed is provided in a hard, brick-like format, then it provides structural integrity and ease of storage, but it requires manual breaking and is difficult to apply
Solution Approach 1:
The patent changes the physical state parameter of the hydroseed from solid brick-like format to a slurry form by incorporating water-soluble polymers and surfactants. This parameter change allows the seed to be easily pumped and sprayed through hoses without manual breaking, while still maintaining effective seed delivery to the target area.
Solution Approach 2:
The patent introduces water-soluble polymers and surfactants as intermediary substances that facilitate the transition from solid seed to slurry form. These intermediaries enable the seed to flow through dispersal equipment by reducing friction and improving流动性, while the seed itself remains intact and viable.
2Ease of operation
If hydroseed is mixed with water, then it becomes dispersible and applicable, but it separates from water if there is any delay in use
Solution Approach 1:
The patent creates a composite material system combining seed, water-soluble polymers, and surfactants. The polymers and surfactants form a protective matrix around the seed particles, allowing the mixture to remain stable and dispersed in water for extended periods without separation, while still being easily applicable when mixed.
Solution Approach 2:
The patent ensures continuous stability of the hydroseed mixture in water through the use of polymers and surfactants that maintain dispersion over time. This allows the mixture to remain usable for extended periods without separation, enabling continuous application operations without premature degradation of the seed slurry.
3Productivity
If traditional hydroseed is used, then it can be applied to large areas, but it clogs the dispersal equipment, especially hoses and pumps
Solution Approach 1:
The patent replaces the mechanical breaking and handling system with a chemical solution system. Instead of mechanically breaking hard seed bricks and risking equipment clogging, the patent uses water-soluble polymers and surfactants to create a flowing slurry that can be pumped and sprayed through standard equipment without clogging, maintaining high productivity.
Solution Approach 2:
The patent changes the rheological parameters of the seed material by incorporating polymers and surfactants. This creates a slurry with optimal viscosity and flow characteristics that can pass through hoses and pumps without clogging, while still delivering seeds effectively to large areas, thus maintaining productivity without increasing device complexity.
4Productivity
If grass seed is incorporated in hydroseed, then it provides vegetation growth, but the seed tends to float rather than remaining well dispersed
Solution Approach 1:
The patent introduces water-soluble polymers and surfactants as intermediary substances that act between the hydrophobic seed particles and water. These intermediaries reduce surface tension and provide a bridging mechanism that keeps seeds uniformly dispersed in the water-based slurry, preventing floating and ensuring even distribution during application.
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 solution provides a softer, easier-to-apply hydroseeding material that adheres well to soil, prevents equipment clogging, and ensures even seed distribution, including on sloped surfaces, with enhanced rain durability and erosion protection.
Implementation Method 1
a cover composition of bentonite clay and cellulosic water-dispersible polymer or starch
Implementation Method 2
adheres well to soil
Implementation Method 3
spraying the hydroseeding slurry on soil
Data Source
AI summary
An erosion control slurry is disclosed. The slurry includes water and a substrate, wherein the substrate comprises: mulch at a weight of x; bentonite clay at a weight of about 0.25x to about 0.495x; and cellulosic water dispersible polymer or starch at a weight of about 0.0025x to about 0.125x. Also disclosed are a substrate that can be mixed with liquid to provide an erosion control slurry, and methods of controlling or reducing erosion.