Nowadays the frame structure is widely used on the building, such as residence, commerce, offices and so on. The advantages of the frame structure are big area, flexible and changeable. And the filling wall is the necessary enclosure design for the frame structure. It can not only meet the use function but also beautify and protect the main building structure. But the frame structure sometimes causes the cracks and the cavity on the wall. This article is about how to prevent the wall cracks with expanded metal and fiberglass mesh so that the building quality would be improved.
Expanded metal plastering is to reinforce the frame structure wall.
The reason that the wall filled with frame structure has cracks.
The plastering material.
The concrete hollow masonry has high shrinkage and it's different to storage. The masonry would has cracks when it's used to build without fully shrinking.The plaster mortar is different from the masonry mortar and the shrinking degree is different too. This could cause cracks. And when the connecting is not firm there would also cause cracks and cavity.
The formula of the sand is not according to the standard. The silt content of the sand is out of the limit.
The variety and strength of the cement is not appropriate for the building. The slag cement of big shrinkage and pozzolanic cement would cause cracks. The common silicate cement also cause cracks. The gypsum mortar is too hard and it's difficult to handle.
The rust resistance layer is not eligible of the expanded metal. The fiberglass grid would get corroded by the alkalinity. The cracks and cavity would happen as time goes by. When the position of the reinforced mesh is not right, or the reinforced measure is not reasonable, the cracks would also happen.
Plastering material (cement mortar, gypsum mortar, mixed mortar) is brittle material and they are easily influenced by the temperature. There maybe the chap on the plastering layer.
The interface agent is not reasonable. The connecting is not firm if the amount of the agent is not precise. The plastering would cause cracks and cavity when the connecting is broken.
The mortar mixing machine is too old and it could not mix the cement evenly. The plastering layer would crack when we water the wall. The transport machinery could not run normally. The mortar maybe lose its active or gets hard when the mortar is transported to the construction site. So it would cause cracks when the improper mortar is used to plaster.
The operator doesn't pay attention to the quality and doesn't handle the machine according to the specified technology. The quality hidden danger would cause the cracks.
It's hot and dry so the wall would crack if the conservation is not enough. The plastering is not strong when the plastering layer is wet because of the rain before the plastering is solidified. If there is not antifreeze measure during winter, the plastering would crack because of frost damage. If the plastering layer is not solidified and is exposed to the heavy wind it would cause cracks. It would cause cracks if the plastering is hit heavily.
The measures for frame structure anti-cracking.
The main reasons that the frame structure cracks.
The measures for cracks.
We should strengthen management for the workers. We should communicate with the workers. We can use the production to tell the workers the goal that we want. We talk about the technology, process, the insures, the standard and the technical training. The examination of the mixing, base handling, plastering and the conservation should be in time so we could find problems and solve them in time.
We should check the blender and other machines on using and maintain the machines.
The conservation should be in time during the rainy season. The waterproof measure should be set before the plastering layer is solidified. The wind proof measure should be set when it's windy heavily.
The construction technology.