Autoclaved lightweight aerated concrete (ALC) is a building material with outstanding properties such as lightness, strength, and dimensional stability. Developed in Japan, it is widely used in homes and multi-story buildings. It has good thermal insulation, water resistance, and fire resistance.
AAC is a building material that has gained popularity due to its excellent thermal insulation properties. This material is based on cement and lime, but a small percentage of aluminum is added to increase its strength.
Compared to traditional construction materials, the density of AAC is very low. This is achieved through the formation of air voids. Usually, these voids are between 1 mm and 5 mm across. The appearance of the material is also affected by the number of air voids.
It has been shown that mineral additives can improve the density of AAC. For example, argillite, a carbonaceous industrial by-product, was used as a mineral admixture. The mineral additive was incorporated as a 10 % replacement for cement. XRD and scanning electron microscope observations showed that anhydrite was present in the samples.
The density of AAC is dependent on its pore structure. Generally, there are many independent pores in the material. The pore size of YTONG(TM) cellular concrete ranges from 75 to 80%. Its porosity is largely determined by the packing of thin tobermorite plates.
The moisture content of AAC has also been studied. It has been observed that the AAC has high resistance to water penetration and is resistant to insects. In addition, it is easy to cut and shape.