Comparison of troweling and spraying processes before plastering

Shijiazhuang Qingquan Cellulose Co., Ltd.is a company from Chinahpmc/pva/cmc/mhec/hec manufacturer HPMC is one of our key products, this product is excellent quality, reasonable price and can be used as a thickening/water retaining agent for mortar in construction, and it is popular with people all over the world.

Before plastering, interface treatments such as spraying and patting are usually necessary procedures, and the core purpose is to prevent the plastering layer from hollowing and peeling off.

I. Comparison of Two Mainstream Processes

The main difference lies in the tools and the final effect:

Process Name: Spraying/Flinging

Definition and tools: Spray or brush polymer interface agent. The tools are spray guns or brooms.

Advantages: Relatively fast construction speed.

Limitations: The quality (uniformity and height) of the burrs drawn out are difficult to control, which may lead to excessive spacing and insufficient adhesion.

Process Name: Patting slurry

Definition and tools: Use a specially made steel wire mesh racket dipped in slurry to manually tap the wall. The tool is a steel wire mesh racket.

Advantages: It can form a rough surface with a thick base and a pointed top, resembling thorns, and it adheres more firmly to the base layer. The quality is easier to control and can significantly reduce hollowing.

Limitations: Relies on manual labor and requires a certain level of proficiency.

II. How to Select and Key Points of Construction

Overall, "patting the slurry" is currently a more effective and recommended process.

Under what circumstances should slurry bidding be given priority?

The base layer is a smooth concrete wall surface: the rough surface created by troweling can greatly enhance the bonding force.

Areas with high quality requirements: such as the walls of main Spaces like living rooms and bedrooms.

The problem of hollowing still occurs after traditional spraying: the patting process can be adopted for improvement.

2. Key construction steps (taking patting slurry as an example) :

Base treatment and moistening: Clean the wall surface in advance and make repairs. Before plastering, thoroughly moisten the base layer. For aerated blocks, the moistening depth should be 8 to 10 millimeters.

Slurry preparation: Usually, cement, fine sand and glue (such as plain cement slurry mixed with environmentally friendly glue) are used to prepare a thick paste-like slurry on site.

Patting the slurry operation: Dip a specially designed paddle in the slurry and pat and quickly pull it on the wall to form uniform and sharp burrs.

Coverage density and maintenance: Burrs should cover more than 95% of the base layer. After patting the slurry, it is necessary to spray water for maintenance for at least 2 to 3 days until it can no longer be bent by hand.

In summary, the interface treatment before plastering is crucial, and patting mortar is a better choice to ensure quality than traditional spraying. If you are the owner, you can request the construction party to adopt this process and pay attention to its operation norms.