Install necessary fittings for movable partition walls

In order to rationally select materials and improve the sound absorption and Sound Insulation treatment of buildings, firstly, the sound insulation, sound insulation, sound absorbing materials and sound insulation materials are conceptually distinguished, which should be the primary basic problem in building noise control.
Most of the buildings in the 1980s and before, the partition walls mostly use clay bricks, and the 240mm clay brick walls have a sound insulation of more than 50dB, and the sound insulation effect is good. However, today's building partitions have undergone fundamental changes. On the one hand, for the need of environmental protection, clay bricks have been banned in buildings because clay bricks will destroy farmland; on the other hand, due to the new building system and high-rise buildings, the weight is light. To make the partition wall structure tend to be thin and light. The sound insulation of light walls is generally low, and single-walls generally do not reach 50dB. Usually below 45dB, which makes the sound insulation worse than traditional clay brick walls.

At present, there are five main types of partition wall materials and components, and their sound insulation conditions are generally as follows:
(1). The sound insulation of the cast-in-place solid reinforced concrete wall with a thickness of 200mm or more on the concrete wall is close to that of the 240mm clay brick wall. The sound insulation of the 150-180mm thick concrete wall is about 47-48dB, but the reinforced concrete with an areal density of 200kg/m2 is porous. Board, the sound insulation is below 45dB.
(2). There are many types of block wall blocks, and there are load-bearing and non-load-bearing blocks according to their functions. Commonly used blocks mainly include concrete hollow and solid blocks such as ceramsite, fly ash, slag, sandstone, etc.; gypsum, calcium silicate and other blocks. The sound insulation of the block wall varies with the weight and thickness of the wall. The sound-insulating performance of the load-bearing block wall with the same areal density as the clay brick wall is similar to that of the clay brick wall. The sound insulation performance of the cement mortar plastering block filling wall is largely determined by the wall surface. The thickness of the plastering layer. The sound insulation of the 15mm~20mm thick cement mortar on both sides is about 43~48dB, and the soundproofing of the lightweight block wall with the areal density less than 80kg/m2 is usually below 40dB.

(3). The strips of the partition wall of the slab wall are usually 60mm~120mm, and the areal density is generally less than 80kg/m2. It has the advantages of light weight and convenient construction. The slab wall can be further divided into two categories: one is used Solid or porous strips made of inorganic cementitious materials and aggregates, such as (reinforced) lightweight aggregate concrete strips, autoclaved aerated concrete strips, steel mesh ceramsite concrete strips, gypsum strips, etc. The sound insulation of single-layer lightweight slatted walls is usually between 32 and 40 dB; the other is prefabricated sandwich slabs, such as concrete rockwool or pre-composited by dense surface materials and lightweight core materials in the production plant. Polystyrene sandwich strip, fiber cement board lightweight sandwich panel, etc. The sound insulation of prefabricated sandwich strip walls is usually between 35 and 44 dB.
(4). The thin-wall composite wall and thin-wall composite wall is a lightweight wall formed by fixing the thin plates on both sides of the keel at the construction site. The thickness of the thin plate is generally 6mm-12mm, the thin plate is used as a wall surface layer board, and the wall keel is filled with rock wool or glass wool. 3. The thin plate varieties include gypsum board, fiber gypsum board, fiber cement board, calcium calcium board, calcium magnesium board, etc.
The sound insulation of the thin plate itself is not high, and the sound insulation of the single-layer board is between 26 and 30 dB, and the double-layer hollow cotton-filled composite wall composed of light steel keel and rock wool (or glass wool) can be obtained. Good sound insulation. Their sound insulation is usually between 40 and 49dB. Increase the number of layers, the sound insulation of the wall can be greater than 50dB.

(5). The core material wall of the cement mortar surface layer is sprayed on the construction site, and then the cement mortar surface is sprayed on both sides of the core material board. Commonly used core plates are steel wire mesh polystyrene board, steel wire mesh rock wool board, and plastic hollow inner template.