Gypsum mortar is divided into dry-mixed gypsum mortar and wet-mixed gypsum mortar. Wet-mixed gypsum mortar refers to a combination of cement, sand, water-retaining thickening materials, water, fly ash or other mineral admixtures and admixtures. The gypsum mortar mixture is divided according to a certain proportion, measured and mixed, and then transported to the place of use by a mixing and conveying truck for proper storage and used within the specified time, including masonry, plastering and ground gypsum mortar.
Generally at the construction site, after the wet-mixed gypsum mortar is delivered to the construction site, it will be required to be used up within a specified time, or there will be a gypsum mortar tank at the construction site to store the wet-mixed gypsum mortar, but after opening After using wet gypsum mortar, it will also be required to be used within a specified time. Why does wet-mixed gypsum mortar need to be used up within the specified time?
Relevant industry insiders said that this is related to the consistency of gypsum mortar. The so-called gypsum mortar consistency refers to the thickness of the gypsum mortar. If too much water is added to the gypsum mortar, it will become thin. If the gypsum mortar is too thin, the gypsum mortar will flow easily. If too little water is added to the gypsum mortar, it will become thick. If the gypsum mortar is too thick, it will be difficult to smooth the gypsum mortar. The consistency of gypsum mortar is lost due to changes in time. When the consistency of gypsum mortar is lost, the properties of gypsum mortar may also change. Therefore, the storage time of wet-mixed gypsum mortar is determined by the consistency of the wet-mixed gypsum mortar at that time.
The consistency of gypsum mortar is divided into machine consistency, discharge consistency and usage consistency. Out-of-machine consistency refers to the consistency of the gypsum mortar when it is just unloaded from the mixer to the transport truck. It is related to the transportation at that time; since the wet gypsum mortar has a transportation process from the mixing station to the construction site, its consistency is affected by factors such as the length of transportation distance, traffic conditions, and weather conditions. Since wet-mixed gypsum mortar is usually transported to the construction site after mixing, if the gypsum mortar is not used up within the specified time, the consistency of the gypsum mortar will generally become thicker, which is not conducive to application.
The unloading consistency refers to the consistency of the gypsum mortar when the transport truck unloads the materials into the ash storage tank at the construction site; the usage consistency refers to the actual consistency of the gypsum mortar during construction, that is, after the gypsum mortar has been stored for a period of time of consistency. The consistency used is affected by factors such as weather, storage time and sealing degree. After the gypsum mortar has been stored for a period of time, the consistency loss of the gypsum mortar is relatively high. In order to ensure that the consistency loss of the gypsum mortar is reduced, it must be used up within the specified time.
If the consistency is high, in order to ensure the quality and safety of the building, it is necessary to re-add water and mix or discard it. Therefore, ensure that the wet-mixed gypsum mortar is used up within the specified time. While improving the safety of the project, It is conducive to construction and greatly improves the effective utilization rate of gypsum mortar.
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