For building construction, the test brought by summer. One is the soaring temperature and the other is abundant rainfall. The suitable conditions for putty construction are that the temperature is 5-35°C and the air humidity is less than 85%. As an essential process of wall construction. If there is a problem with the construction effect
(7) Breathing function: During the hardening process of plastering gypsum, countless tiny honeycomb breathing holes are formed. When the indoor ambient humidity is high, the breathing hole automatically absorbs moisture. Under the opposite conditions, it can automatically release the stored water. Therefore, the indoor humidity is controlled within a suitable range, which improves the living
(1) Strong adhesion: The good workability and fluidity of plastering gypsum make it easy for the slurry to penetrate into the pores and joints of the wall or ceiling. After the slurry is hardened, the volume expands slightly, forming a key tenon and a small hook system. The plastering layer is closely attached to the
4. Is it necessary to use interface agent before spraying? Interface agents are usually used on concrete surfaces. Because the concrete surface is too smooth. By using an interface agent, the surface of the base layer can be roughened. It can increase the adhesion of mortar to the base layer. Avoid plaster layers with hollow
1. What are the advantages and disadvantages of cement and gypsum as machine-sprayed materials? Both cement and gypsum can be used as machine spraying materials. From the point of view of performance, the strength of gypsum matches the general base wall, and there will be no problems of cracking and hollowing of cement mortar. From
How to control the properties of semi-aqueous plastering gypsum? In general, the hemihydrate gypsum produced is often a mixture of hemihydrate gypsum and type III anhydrite. Type III anhydrous gypsum, also known as dehydrated hemihydrate gypsum, has the same crystal phase structure as the original hemihydrate gypsum. Type III anhydrous gypsum will quickly hydrate into
What are the factors affecting the performance of plastering gypsum? (1) The most suitable amount of hemihydrate gypsum. (2) The basic components of plaster of paris. (3) It is most suitable for the grinding and firing process of producing this plaster of paris. (4) The quality and quantity of the additions. (5) Stirring type, adjustment
Bonding mortar is a cement-based prefabricated dry mix. Industrial product designed for bonding insulation boards to base walls. Has excellent adhesion. Good enhancement of sagging resistance, water retention, water resistance, aging resistance and handling. The construction is simple and non-toxic pollution. It is used for the bonding of polystyrene board, rock wool board, extruded plastic
Hydroxyethyl cellulose (HEC) is a non-ionic cellulose ether made from natural polymer material cellulose through a series of chemical processes. It is an odorless, tasteless, non-toxic white powder or granule. It can be dissolved in cold water to form a transparent viscous solution. Dissolution is not affected by pH. It has thickening, binding, dispersing, emulsifying,
The setting time of concrete is mainly related to the setting time of cement, and the influence of aggregate is not great. Therefore, the effect of HPMC on the setting time of underwater non-dispersible concrete mixture can be studied through the setting time of mortar. Because the setting time of mortar is affected by water.
