What is Aerogel Insulation Mortar?
Aerogel mortar is a type of mortar that forms an aerogel-like solid material by combining solid materials such as brick and stone blocks with adhesives and other means. Due to its lightweight, heat insulation, sound absorption, etc. properties, it is widely used in construction, aerospace, and energy fields. Common adhesives include silicate cement, organic adhesives, etc. Preparation of Aerogel Insulation Mortar
Using silicate cement as the main cementitious material, aerogel and glass microbeads and other materials are mixed as aggregates to reduce porosity and increase density, thereby reducing the thermal conductivity. At the same time, an appropriate amount of fly ash, anti-cracking fibers, cellulose ether, wood fibers, and dispersible latex powder are added to improve the mechanical properties and workability of the mortar.
Specific steps:
Cut the solid materials such as brick and stone blocks into small particles;
Mix the adhesive with water and heat to obtain a slurry;
Add the small particles to the slurry and add appropriate foaming agents and other additives;
Mix evenly to distribute air between the solid materials and the slurry;
Place the uniformly mixed aerogel mortar in a mold and allow it to cure.
Test various technical indicators of the insulation mortar:
1. Dry apparent density is 241.4 kg/m³;
2. Thermal conductivity is as low as 0.045-0.052 W/(m·K), lower than that of similar products on the market and meeting national standards;
3. Compressive strength is 0.48 MPa, meeting the requirements of 0.20 MPa in national standards;
4. Linear shrinkage rate is 0.157%.
Classification of Aerogel Mortar: Due to different types of aggregates, aerogel mortar can be prepared in various insulation and heat preservation sands through different process formulas.
1. Using polystyrene particles (EPS) as aggregates, aerogel powder as a compound, and sulfur aluminates cement as the cementitious material to prepare aerogel polystyrene particle insulation mortar with a density of about 140-160 kilograms.
2. Using aerogel particles as aggregates, Portland cement (Po42.5) as the cementitious material to prepare aerogel insulation mortar with a density of about 200 kilograms.
3. Using hollow glass microbeads as aggregates, aerogel powder as a compound, and Portland cement as the cementitious material to prepare aerogel hollow glass microbead insulation mortar with a density of about 150 kilograms.
4. Using perlite phase change particles as aggregates, aerogel powder as a filler, and Portland cement as the cementitious material to prepare aerogel phase change insulation mortar with a density of about 200 kilograms.
5. Using aerogel particles as aggregates and phosphogypsum as the cementitious material to prepare aerogel gypsum insulation mortar.
6. Using aerogel particles as aggregates, aerogel powder as a filler, and modified organic resin as the cementitious material to prepare aerogel insulation mortar with a density of about 130 kilograms. Use
Aerogel mortar, due to its lightweight, heat insulation, sound absorption and other properties, is widely used in fields such as construction, aerospace, and energy. Specifically, in the construction industry, aerogel mortar can be used for internal and external wall insulation, roof insulation, air duct insulation, floor heating insulation, etc.; in the aerospace field, aerogel mortar is used to make thermal barriers for spacecraft, cabin wall insulation materials, etc.; in the energy field, aerogel mortar can be used to make liquefied natural gas storage tanks, etc. With the promotion of energy conservation and environmental protection and the continuous innovation of technology, aerogel mortar has broad application prospects.