Nano-Veneer Cementitious Formulation for Hot Water Stability
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Solution Overview
Problem
There is a need for a construction material that is free of crystalline silica, provides structural integrity, fire-resistance, excellent insulation properties, and superior resistance to mold, mildew, termites, and has high hot water stability.
Innovation Solution
A process for making an ultra-stable cementitious material with a crystallized portion and an amorphous nano-molecular veneer, formed by blending magnesium oxide and magnesium chloride, adding aggregate, and treating with phosphorous or phosphoric acid to create a nano-molecular veneer that encapsulates the crystallized portion, enhancing its stability and resistance to degradation in water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If crystalline silica is used in construction materials, then structural integrity is improved, but health hazards and environmental concerns worsen
Solution Approach 1:
The invention extracts and removes crystalline silica from the construction material formulation entirely, replacing it with alternative materials that provide structural integrity without the associated health hazards. This directly addresses the contradiction by eliminating the harmful substance while maintaining the desired structural properties through other means.
Solution Approach 2:
The invention employs composite materials consisting of multiple components including cementitious materials, aggregates, and other binders that work together to provide structural integrity. This composite approach replaces the need for crystalline silica by distributing structural functions across multiple materials, thereby achieving strength without the harmful effects of silica exposure.
2Ease of manufacture
If conventional cement formulations are used, then ease of manufacture is improved, but stability in hot water and resistance to degradation worsen
Solution Approach 1:
The invention modifies the chemical composition parameters of the cementitious material by incorporating specific additives and admixtures that enhance hot water stability and resistance to degradation. These parameter changes include using crystallization inhibitors, superplasticizers, and other chemical modifiers that improve performance in hot water environments while maintaining manufacturability through standard construction material production processes.
3Reliability
If traditional construction materials are used, then fire-resistance may be maintained, but resistance to mold, mildew, and termites worsens
Solution Approach 1:
The invention creates a composite construction material that integrates multiple functional components: fire-resistant cementitious matrices combined with biocidal additives and mold-inhibiting agents. This multi-functional composite structure simultaneously provides fire-resistance and protection against mold, mildew, and termites, resolving the contradiction by combining multiple protective functions in a single material system.
Solution Approach 2:
The construction material is designed with multi-functionality, serving as both a structural element and a protective barrier against multiple harmful agents. The material incorporates additives that provide simultaneous protection against fire, mold, mildew, and termites, making a single material system that addresses multiple reliability concerns without requiring separate protective layers or treatments.
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 resulting material exhibits increased stability in high temperatures and moisture, reduced corrosion effects on other building materials, and improved water tolerance without compromising structural strength or fire-resistant properties.
Implementation Method 1
Phosphorous acid or phosphoric acid or both are then added to the amorphous phase, actuating crystallization of a portion of the amorphous phase
Data Source
AI summary
An ultrastable cementitious material with nano-molecular veneer makes a cementitious material by blending 29 wt % to 40 wt % of a magnesium oxide dry powder containing 80 wt % to 98 wt % of magnesium oxide based on a final total weight of the cementitious material, with 14 wt % to 18 wt % of a magnesium chloride dissolved in water and reacting to form a liquid suspension, mixing from 2 to 10 minutes, adding a phosphorus-containing material, and allowing the liquid suspension to react into an amorphous phase cementitious material, wherein a portion of the amorphous phase cementitious material grows a plurality of crystals. The plurality of crystals are encapsulated by the amorphous phase cementitious material forming a nano-molecular veneer. A process to make the ultrastable cementitious material. A tile backer board incorporating the ultrastable cementitious material and a process for making the tile backer board.