12 wall is laid flat, with brick width 1 15mm as the wall thickness and brick length of 240mm as the wall laid along the wall direction. 18 wall refers to the wall with a wall thickness of 178. The sign size is 180mm, and the structural size is 178mm.
The masonry thickness of the wall is determined by the multiple of half brick, such as half brick wall, one brick wall, one brick wall and two brick walls. , the corresponding actual dimensions are 1 15mm, 240mm, 365mm, 490mm, etc. Traditionally, it is called by its symbolic dimension, such as 12 wall, 24 wall and 37 wall.
Extended data
Matters needing attention in building walls
1, before the wall construction, it is best to water and wet the bricks and blocks two days in advance, and never cast them on the spot.
2. Once the mortar hardens, don't add water to stir, and don't waste too much. The consequence of using overnight mortar is that the wall is unreliable.
3. Generally speaking, adding plasticizer into cement mortar will greatly reduce the compressive strength of masonry. Because of the characteristics of cement, it is best not to add plasticizer, otherwise it is not conducive to the stability of the wall.
4, mortar to avoid the rain, the operation should be standardized as far as possible, don't exceed the standard to increase the amount of sand, which not only wastes materials, but also is not conducive to increasing the strength of the wall.