Multilayered Radon Barrier Mat Under Concrete Slab
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for preventing radon gas and moisture infiltration into buildings through concrete slabs are not entirely effective, particularly in modern constructions with in-home offices, where radon gas and moisture can still penetrate, posing health risks.
Innovation Solution
A multilayered mat system is placed under the concrete slab, comprising a non-permeable layer facing the slab, an entangled net layer for gas and moisture collection, and a permeable layer for escape through a vent system, with optional vapor barriers and insulation, to inhibit radon gas and moisture entry and facilitate their removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-layer barrier is used under the concrete slab, then the structure is simple and cost-effective, but it fails to effectively block radon gas and moisture infiltration
Solution Approach 1:
The barrier system is divided into three distinct layers: a non-woven polyester filter fabric layer for moisture management, a polymer matrix entangled net layer for structural support and radon collection, and another non-woven polyester filter fabric layer for additional filtration. This segmentation allows each layer to perform its specific function optimally, creating an effective composite barrier against radon gas and moisture infiltration.
Solution Approach 2:
The invention uses a composite structure combining different materials with complementary properties: non-woven polyester fabrics provide permeability and filtration, while the polymer matrix entangled net provides structural integrity and radon gas collection capability. This composite approach achieves superior radon and moisture barrier performance that neither material could achieve alone.
2Reliability
If the barrier layer is made completely non-permeable to block radon gas, then radon blocking effectiveness improves, but moisture accumulation increases
Solution Approach 1:
The barrier system exhibits different permeability characteristics at different locations and layers: the non-woven polyester filter fabric layers are permeable to moisture vapor, allowing moisture to escape, while the polymer matrix entangled net layer provides radon gas blocking. This local quality differentiation enables simultaneous moisture management and radon prevention without compromising either function.
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 multilayered system effectively blocks radon gas and moisture from entering buildings, ensuring a healthier indoor environment by redirecting and removing these substances through a vent system, enhancing the existing radon and moisture abatement capabilities.
Implementation Method 1
The first layer is non-permeable and faces the concrete slab
Implementation Method 2
The second layer is permeable layer
Data Source
AI summary
A radon gas and/or moisture abatement system (or method) is located under the concrete slab of a building. The system (or method) includes a multilayered mat having a first layer, a second layer, and a third layer sandwiched between the first layer and the second layer. The first layer is non-permeable and faces the concrete slab. The third (or sandwiched) layer is an entangled net. The second layer is permeable layer. The layers are bonded together. Whereby radon gas and/or moisture are inhibited from entering the building by passing through and collecting in the multilayer product.