AAC Light White Thermostone Bricks

  • Home
  • AAC Light White Thermostone Bricks

What is AAC Autoclave Thermostone Brick?

Thermostone bricks are lightweight aerated concrete (AAC) also called aerated concrete. Thermostone is a thoroughly cured mixture of lime materials such as cement and fine silicon materials such as quartz sand with the addition of water and aluminum powder that acts as a foaming agent to form a homogeneous cellular structure known as calcium silicate hydrate. Thermstone bricks are a high quality structural material, carrier and insulating material very well due to the many small, non-connected air bubbles that give thermostone its incredibly versatile qualities. High-pressure steam curing in an autoclave achieves a physically and chemically stable product with an average density of approximately one-fourth of regular concrete.

Thermstone bricks

Thermostone bricks are produced as precast reinforced blocks and units, walls and lintels/roofs that form a complete building system. Thermstone bricks have been used in large-scale projects such as residences, schools, hospitals, commercial, industrial and government projects under all climatic conditions since the early 1930s all over the world. Thermstone brick is certainly one of the major achievements in the field of construction. It is a revolutionary material that offers a unique combination of strength, lightness, heat insulation, sound absorption, unsurpassed fire resistance and unsurpassed buildability. Thermostone brick is a natural, non-toxic, energy-saving and environmentally friendly building material. As a building system, thermostone bricks meet all the requirements of our modern times around the world. Its properties guarantee a building material that outperforms all others. In view of the rapid development and increasing demand, we can claim with certain justifications that thermostone bricks are the perfect choice for building construction

Advantages of of Thermiston Bricks

Color and Texture
Thermostone brick is grayish white with a flat surface.
The pores in the thermostone brick material can be divided according to the size into small pores (<0.1mm) and large pores (0.1 to 1.0mm). Of the total porosity or pore size, approximately 35% are micropores and the remaining 65% are large pores
Product application and characteristics data
Solid thermostone bricks are used as non-load bearing walls and heat insulating ceiling tiles as roofing blocks.
1- bricks Thermostone blocks are now produced in the following standard sizes: Standard face size: 20cm high x 60cm thick: 10, 15, 20, 30 and 40cm The above standard sizes are usually with a nominal dry density of 550kg/m3 Available in our stock. It is possible to produce other dimensions upon request, but these should be referred to the sales department or technical departments for verification.
2- Robes Ribs blocks or grouting blocks for corrugated board can be produced in various dimensions to form a lightweight grouting between the ribs of reinforced concrete in situ designed to span in one or both directions. Due to their excellent bond to on-site concrete, rib blocks can be easily arranged to form a permanent part of the slab, providing excellent thermal insulation as well as a fire retardant material. Rapes are produced with a density of 450 kg / m3 according to the following dimensions: Length: 60 cm Height: 20 cm Thickness: 20, 25, 30, 35 cm
With a tolerance of ±3 mm for thickness and width, Therefore it can be laid by thin mortar (mortar) with a maximum of 3 mm. This results in a high-quality wall structure with uniform thermal insulation and quick installation
Thurmaston bricks are produced through a very complex and advanced manufacturing process under the close supervision of chemists and engineers. Thermostone bricks and rubbles are manufactured in all thicknesses 5 cm / 7.5 cm / 10 cm / 15 cm / 20 cm / 25 cm / 30 cm, with a height of 20 cm and a length of 60 cm. The basic raw materials are silica, water, aluminum powder and cement. The silica is ground to the required fineness in a ball mill before being mixed with other raw materials with water to form a slurry to which a proportion of aluminum powder is added as an expanding agent. The regulated amount of aluminum powder gives precise control over the density of the final product. The molds are only partially filled with slurry which then expands in a controlled reaction to fill the molds. When the block is solid enough, the molds are stripped and the cake is cut with wire to close the tolerances of the slabs and blocks using high precision cutting technology. It is then steam cured under high pressure in an autoclave for up to 15 hours. This completes the chemical process, resulting in a unique crystal structure of calcium silicate hydrate and ensuring a stable, inert product that gives AAC distinct qualities not found in other products. When cooled to ambient temperature, the blocks are disassembled and cut as needed. Molds are disassembled, installed, marked and stored on wooden pallets. In fact, the thermostone brick manufacturing process produces no polluting waste gases, no hazardous waste, and no waste of expensive raw materials. The final inspection program ensures the quality of the products.
for more Quality Control The manufacture of lightweight aerated concrete as blocks is based on quality management that meets the requirements of ISO 9001: 2015. The internal quality of silica sand, cement, gypsum, magnesium, lime, aluminum powder and process water is guaranteed. In a chemical lab. For the finished products, compression, shrinkage and dry density test are carried out on a daily basis. Crack and rip load testing is performed on the load testing machine to ensure product quality. After sterilization, the thermostone blocks are ready for packing and distribution. The blocks are joined in bundles and marked with a stamp indicating the dimensions of the block and the type of density. The blocks are arranged in piles on wooden pallets and sent for storage or distribution
Nominal dry density 520-550 kg/m³ for brick blocks Nominal dry density of rhubarb masses (hordy) 450-470 kg/m³
The thermal expansion of Thermiston bricks is in the range of 8×10-6/°C. The coefficient of expansion of ordinary concrete ranges from about 4 to 14×10-6/°C depending on the type of aggregate and curing procedures.
Thermstone brick products contain a moisture content of 25-40% by weight when the material is delivered. As with all concrete products, thermostone bricks will dry to equilibrium with the moisture content of the surrounding air. In this case, the moisture content is from 2% to 6% within one year of complete drying As with all other concrete finishes, panels and walls must receive protection against water penetration, for exterior walls this can be one decorative coating
The loss of moisture in AAC results in drying shrinkage. It is defined as per European standard as the relative length change of specimens at specified moisture contents of 03% and 6% by mass respectively. The average shrinkage of AAC is 200×10-6 compared to 500×10-6 for normal concrete. The low shrinkage of AAC is mainly attributed to the high pressure steam curing (steam autoclaving) to which the fresh material is subjected during production.
Endurance time/hourThickness
410 CM
715 CM
7+20 CM
Thermstone bricks are less affected by high temperatures than dense concrete, not only on the uncovered side but also on the heat-exposed side. This fact is important because it affects the protection of rebar in structural units.
Thermostone products are designed to withstand normal handling and transportation. Thermstone bricks should be handled by forklifts and/or cranes with appropriate straps to avoid material damage. Thermstone bricks are shipped by flatbed trucks or trailers and can be transported by road, train and sea for international projects.
They have unlimited storage stability, provided that they are not exposed to harsh conditions. They must be supported by properly placed stands and stored in such a way that they cannot absorb water from the ground or be sprayed with sea water. Thermstone bricks are inorganic and are not affected by termites and other insects. Pallets (height 60 cm) are stored on wooden pallets. Each pallet can store up to 3 blocks of blocks (180 cm high). In the storage area, the floor should be level to avoid tilting of the stock. The block stock can easily hold 3 pallets with 3 bundles for each of the brick blocks.

Benefits of Thermiston Bricks

Light weight
Thermostone bricks weigh less than a quarter compared to conventional concrete. Due to the characteristics of light weight thermostone bricks, foundation loads are significantly reduced resulting in significant savings in the overall construction cost especially in areas with poor soil bearing capacity. Light weight also means a huge advantage in transportation cost. Thermostone brick products have a nominal dry density of 550 kg per cubic meter and weigh less than a quarter compared to conventional concrete. Other densities such as 450 or 600 kg per cubic meter can also be produced upon request. Due to its light weight.
Thermstone bricks ensure a healthy and comfortable room temperature without the need for additional insulation. Thermal insulation and heat retention provide good protection against rapid cooling or overheating. This means lower energy consumption in the EMS.
The production process guarantees the exact dimensions of the panels and blocks that make up the building system. This allows for straight walls and plumbing which results in less trimming on site and reduces the amount of mortar and finishing materials required. Dimensional tolerance is ±3mm for thickness and width and ±5mm for length
The thermal conductivity (“k”) of Thermostone bricks is dry 0.096 W/mºC. The air bubbles trapped in it give it 10 times better insulation properties compared to conventional dense concrete. This is reflected in significant savings in electricity consumption and improved indoor comfort. An independent study confirmed that energy cost savings of 63% are achieved when Thermostone bricks are used to build a two-storey house model with a total area of ​​525 square meters.
Other savings are also achieved by replacing a sandwich wall 30-35 cm thick with one wall 20 cm thick of Thermostone bricks. This will reduce the size of the RC. Beams, columns and foundations will provide more living space. Masonry system Thermostone bricks are ideal not only for external and internal walls, but also for ceilings. All this leads to a decrease in the average value of the thermal conductivity of the entire building surface. Thermstone brick is the only structural material classified by the Saudi Electricity Company as an insulating material. The qualities of thermostone bricks not only exceed its competitive building materials, but also far outnumber them.
Thermostone brick products can be sawed, cut, slotted, drilled, chased and nailed with ordinary carpentry tools making them easier to install compared to other building materials. This also simplifies the installation of electromechanical services and other facilities, which means more cost savings.
Thermstone brick is a completely inorganic material that does not contain any combustible substances, which means that it is fire resistant. A board with a thickness of 15 cm withstands a fire for seven life-saving hours. Thermstone brick is ideal for firewall application and as protection for structural steel building. Thermstone bricks have fire-resistant properties and are non-combustible. Thermal conduction occurs at a slow rate due to its low thermal conductivity, which gives thermostone bricks excellent fire resistance. Water in crystalline form within the material acts as a heat sink and the porous structure allows vapor to escape without causing surface spallation. Due to its excellent fire resistance and the very positive practical experience obtained, Thermstone brick slabs and blocks have gained widespread popularity in construction all over the world. In many cases of building fires, structural parts of thermstone bricks have been able to continue functioning with minor repairs, greatly reducing the cost of fire damage. Thermstone bricks are less affected by high temperatures than dense concrete, not only on the uncovered side but also on the heat-exposed side. This fact is important because it affects the protection of rebar in structural units. The following table shows average rates of unprecedented fire with different thicknesses of thermstone brick walls: Flame tolerance table
Thermstone brick meets the appropriate standards for sound insulation in the home building, which means the cabin is quieter and more c
Thermstone blocks are environmentally harmless, as they contain no gases, no fibers, are not dangerous to ground water and do not emit any radioactive radiation. No pollutants or toxic by-products are produced in the manufacturing process or even when exposed to fire.
Thermstone brick products do not contain any organic materials that are subject to deterioration and will not decompose even under extreme weather conditions. Structures built several decades ago are still in active use today. Thermstone bricks are solid and have high compressive strength for their weight, which in terms of application is quite sufficient to withstand masonry loads. Thermstone bricks achieve their final strength during the autoclaving process. The following is the minimum characteristic strength of thermstone brick material corresponding to the cube sample having a nominal dry density of 550 kg / m3:
Compressive strength = 35 kg / cm2
Tensile strength = 20 to 40% of the compressive strength
Shear strength = 20 to 30% of the compressive strength
Modulus of elasticity = 16,000 kgf/cm2
The low mass of thermstone reduces the total dead load of the building and thus the seismic forces applied to its structure. Structures built in earthquake zones such as Japan and Mexico have shown good resistance to seismic forces in actual practice.
Thermstone blocks have all the advantages of the precast system i.e. it eliminates shuttering, wet construction, curing, on-site testing and quality control resulting in reduced overall construction time and cost. It also requires minimal supervision and construction personnel.
Thermostone bricks provide an airtight interior, contain no organic components and make your home unattractive to pests, insects or rodents. Pozzolan brickProperties of Thermostone bricksSound Transmission Class (STC) rating is a single number guide used to rate acoustic barriers according to their effectiveness in reducing sound transmission. Sound reduction is the ratio of sound energy at its source to that at any other location expressed in decibels (dB). It is important to note that the decibel scale is logarithmic, i.e. an increase of 10 dB means a reduction of sound to one tenth, 20 dB a reduction to one hundredth and so on. Figure 4 shows some STC ratings for some wall constructions made of Thermostone bricks. Sound Transmission Class of some few Thermostone wall constructions. Thermostone bricks also provide superior sound absorption better than regular concrete and are more pronounced at high frequencies. This property reduces the effect of echo (i.e. sound reflection) in empty rooms
At normal equilibrium moisture content, the specific heat is 1.0 – 1.1 kJ/kg °C or about 0.24 – 0.26 kcal/kg °C.
Thermiston bricks begin to sinter at about 1000°C and melt at about 1100 to 1200°C. A certain physical transformation occurs in these conditions, so thermostone bricks are not suitable for construction that will be exposed to high temperature, for example. Furnaces, stoves, chimneys, etc.
Like any other cementitious material, thermiston brick material is damaged by strong acids. Acidic salt solutions such as chlorides or sulphates may also cause thermiston brick to deteriorate in the long term. However, thermiston brick is usually not affected by alkaline solutions. The vital components of thermiston brick are insoluble in water. However, like most concrete building materials, thermiston brick contains a small amount of water-soluble salt which has no effect on strength and resistance. Under extreme conditions, it can appear on the surface as efflorescence. The formation of saltation is mainly a matter of repeated wetting under a range of very poor drying conditions. Under normal drying conditions, it rarely occurs.
Even with normal construction procedures, Thermostone brick buildings have excellent air resistance properties. Tests on AAC buildings have measured 1 to 2.5 air changes per hour at a reference pressure of 50 Pa. This compares favorably with other types of construction, such as concrete blocks, where the average air change rate at 50 Pa is about 7. (Ref. NPCA, June 26, 2000) Thermostone brick construction method

How to build AAC Thermiston bricks

First: The site is well prepared and all necessary tools are equipped before starting work on the site and the bricks are stacked correctly to reduce waste and facilitate transportation and handling during the construction process.

Second: The bricks must be sprayed well with water before construction so that they do not absorb the water in the mortar, as the light bricks are cement-based in addition to being porous in composition and require treatment with water like concrete and other types of bricks. Second: The steps for building Thermstone bricks

Third: To avoid cracks in the short or long term, it is forbidden to mix the construction of any type of brick with the light brick in the same wall because this leads to a lack of homogeneity due to the difference in expansion and contraction coefficients, which causes cracks in most parts of the wall. Also, using different types with the light brick reduces the efficiency of thermal insulation and fire resistance that light bricks are characterized by. Thermstone bricks

Fourth: The bricks must be stacked near the walls that will be painted in order to facilitate the construction worker and save time. Care must be taken to mix and stir the mortar well and not to ferment an excessive amount. It is preferable to fill the seams between the bricks using:- Thermoplaster mortar: prefabricated cement mortar bags mixed by adding 7-8 liters of water to one bag (25 kg) to be sufficient to fill the seams of a cubic meter of light bricks. It is executed with a thickness of 3-4 mm. . Using a special type of ruler. Regular mortar: (cement, calcium carbonate and silica in a ratio of 1: 2: 3. Lime is added to the mixture at a rate of 10% of the cement - and it is recommended to add long-chain polycarboxylic polymer chemical additives to the mixing material to increase the cohesion strength of the mixture and is added at a ratio of 10: 1 of the mixing water. Ready-made mortar: The pre-prepared mortar is mixed in the required quantity manually or mechanically in a container designated for mixing (barrel-tekne-bucket-…) for 2-3 minutes until it reaches the desired consistency, and is left for a period of 5-10 minutes. It is also possible to use: The pre-prepared mortar is mixed in the required quantity manually or mechanically in a container designated for mixing.

Fifth: After spraying the bricks and preparing the mortar, we begin the brick building process easily, but in the first course, it is necessary to prepare the surface to be built on and ensure that it is clean and free of dust or other materials, then Adjusting the horizontality of the first course using regular mortar (to control the thickness of the welding layer between the brick and the concrete surface to ensure the horizontality of the course). A water level or similar is used to adjust the horizontality of the first course and the brick is fixed using a rubber mallet.

Sixth: Construction is carried out in the traditional way (sharing) so that horizontal lines are tightened for every two courses at most, and a shaghol thread level is used every three courses at most to ensure that they are at a vertical level, and a pole that cannot be less than 3 meters long is used in all directions to ensure that one course does not protrude from the other, which causes sagging in the plaster. Because the dimensions of the light porous brick are very precise, they help facilitate the process of laying the bricks and straightening the construction courses well and at high speed. Steps for building with light porous bricks

Eighth: A metal mesh or fiberglass is used to the width of the brick along the course every five to six courses and tied by pressing the columns or concrete at the beginning and end of the course.

Ninth: After completing the construction, make sure that all (welds) are filled in order to ensure the highest quality of the wall (the wall is well lined).

Thermstone bricks

Tenth: The blocks are cut using a saw or using a cutting knife with adjusting the verticality of the cut and using the iron angle in order to easily obtain the dimensions to be cut, whether for the wall, closures, or for grinding, and also to reduce waste.

Eleventh: When making electrical extensions or sanitary works, an electric rocket is used to determine the dimensions and depth of the openings, and then the removal and creation of the required cavity is done using a chisel. You can also use the special manual drilling machine provided by the company through the technical support service, and you can also use special mechanical equipment to open drains in the walls. Direct chisel breaking is prohibited, as is the case in some locations, to prevent random wall breaking that weakens the efficiency of the bricks. Make sure to spray the surfaces with water after making electrical or sanitary openings, before plastering. Twelfth: Any type of door or window frames (wood or iron) can be easily installed using black roll nails after spraying them with an opoxy layer (mechanical or chemical), taking into account spraying the surfaces well with water. It is also possible to install building work accessories (mesh wire and cans) in the case of using regular mortar.

Thirteenth: Before starting the plastering preparations, the wall is sprayed with water.

Fourteenth: The splashing is done in the traditional way and using mortar in the usual proportions, provided that it is a rough and sharp splash.

Fifteenth: The accessories for soft plastering work (mesh wire and bullets) must be used at the joints between the concrete and the walls. Chemical materials such as polyurethane or similar can also be used to avoid cracks in the joints between the bricks and concrete.

Sixteenth: The soft plastering is done in the traditional way, provided that the filling is done in stages to avoid cracks resulting from soiling.

Thermstone bricks