Liquid Regulator for Autoclaved Aerated Concrete Dispersion
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Solution Overview
Problem
The use of low-quality silica sand with high porosity and mud content in autoclaved aerated concrete production leads to poor slurry diffusion and increased production costs, affecting the mechanical and thermal insulation performance of the concrete.
Innovation Solution
A liquid regulator comprising a hyperdispersant, anti-mud agent, shrinkage reducing ingredient, and foam stabilizing ingredient is used to enhance the dispersion and stability of the concrete, improving the liquid phase dissolution rate and overall performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If low-quality silica sand with high porosity and mud content is used, then production cost is reduced, but slurry diffusion performance deteriorates and production efficiency decreases
Solution Approach 1:
The patent introduces a liquid regulator as an intermediary substance to mediate between the low-quality silica sand and the slurry. The liquid regulator contains dispersants and surfactants that act as mediators to improve slurry diffusion performance without requiring high-quality silica sand, thus maintaining low production costs while resolving the productivity issue
Solution Approach 2:
The patent changes the chemical parameters of the slurry system by adding liquid regulator components (dispersants, surfactants) that modify the physical and chemical properties of the slurry. This allows the system to achieve good diffusion performance with low-quality silica sand by altering the slurry's rheological parameters rather than improving the sand quality
2Quantity of substance
If low-quality silica sand with high mud content is used, then material cost is reduced, but concrete stability and mechanical performance deteriorate
Solution Approach 1:
The patent converts the harmful effect of mud content in low-quality silica sand into a beneficial outcome. The liquid regulator contains additives that can bind with mud particles and transform them from harmful impurities into functional components that contribute to concrete stability, thus allowing the use of low-cost sand while maintaining reliability
Solution Approach 2:
The liquid regulator acts as an intermediary between the mud content and the concrete matrix, mediating the interaction to ensure stability. The chemical components in the liquid regulator bridge the gap between the impure silica sand and the cementitious materials, ensuring proper bonding and structural integrity
3Ease of operation
If water-material ratio is increased to improve slurry workability, then ease of operation is improved, but shrinkage and volume stability deteriorate
Solution Approach 1:
The patent changes the chemical composition parameters of the slurry by adding liquid regulator components that improve workability through chemical mechanisms rather than simply increasing water content. This allows maintaining good ease of operation while avoiding the shrinkage and volume stability issues associated with high water-material ratios
Solution Approach 2:
The patent replaces the mechanical approach of increasing water content to improve workability with a chemical approach using liquid regulator additives. These additives modify the rheological properties through chemical interactions, achieving good workability without the adverse effects of excessive water
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 liquid regulator significantly improves the dispersion and stability of the concrete, reducing shrinkage and enhancing mechanical strength, while reducing the water-binder ratio and cement usage, thus lowering production costs and improving thermal insulation.
Implementation Method 1
a polycarboxylic acid substance is adsorbed on surfaces of the cement particles
Implementation Method 2
so that electrostatic repulsion is produced between the cement particles and the cement particles are dispersed
Implementation Method 3
can greatly improve a diffusivity of slurry preparation of silica sand
Implementation Method 4
0.05 part to 0.1 part of foam stabilizing ingredient
Data Source
AI summary
Disclosed is a liquid regulator for ultra-dispersed, high-mud-resistance, high-foam-stability, low-shrinkage and enhanced autoclaved aerated concrete, which comprises the following ingredients in parts by weight: 75 parts to 85 parts of hyperdispersant; 5 parts to 10 parts of anti-mud agent; 1 part to 3 parts of shrinkage reducing ingredient; 10 parts to 20 parts of reinforcing ingredient; and 0.05 part to 0.1 part of foam stabilizing ingredient; and the invention further discloses a preparation and application thereof. By adding the liquid regulator into the autoclaved aerated concrete, the effects of ultra-dispersion, high mud resistance, high foam stability, low shrinkage and performance enhancement can be achieved.