Difference between flexible putty and rigid putty and its construction method

Rigid putty belongs to P type putty, and flexible putty belongs to R type putty.

2, the crack resistance is different

The dynamic crack resistance of flexible putty is more than twice that of rigid putty.

3. Different flexibility

Flexible putty means that the putty is flexible, not so hard, but soft. Rigid putty has high cement content and is hard, so cracking is inevitable.

Flexible putty and rigid putty are constructed in the same way;

1. Treatment: First, clean the substrate, which is required to be clean and flat.

2. Add dry powder and water into the container, stir evenly with special tools, let stand for 5 minutes, and then stir. The water content of putty dry powder is 30%.

Feeding sequence: add water before feeding.

Putty scraping: Putty scraping is a method of scraping putty with a trowel, scraper or putty knife.

3. The main points of putty scraping are solid, flat and smooth. That is, the putty has close contact with the base, firm bonding and smooth surface, which reduces the polishing workload. When the base has strong absorbability, it should be sealed with primer before scraping putty, so as to avoid the base absorbing too much water and rubber in putty and affecting the adhesion of putty.

4, scraping tool inclination is good, uniform force, to ensure that the putty is full. In order to avoid excessive shrinkage, cracking and shedding of putty, scraping in batches at a time should not be too thick. According to the characteristics of different putty, the thickness should be 0.5 ~ 65438 0.0 mm.

5. Polishing of putty: Polishing refers to the process of polishing the surface of the coated object with abrasive. It has a great influence on the smoothness, adhesion, corners and lines of the coating. In order to achieve the desired polishing effect, appropriate polishing methods and tools must be selected according to the quality requirements of different processes. Polishing must be carried out at the grass-roots level or after putty is dried, so as not to stick sandpaper to affect the operation.

Extended data;

Characteristics of flexible putty;

1, waterproof

The external wall thermal insulation system is in the natural environment and is often damaged by water. Putty is on the surface of the external wall insulation system, and there is only a thin coating outside the putty layer. Exterior wall insulation system is often damaged by external forces in practical use, such as impact and friction, and the paint surface layer is easy to be damaged, thus exposing the putty layer to the natural environment.

When encountering rain and snow and sudden drop of temperature, the putty layer will be destroyed by rain erosion and repeated freezing and thawing, resulting in peeling, falling off and cracking.

Therefore, in order to resist the damage of water, the external wall insulation system requires the putty layer to have good water resistance, which can prevent the entry of external water and make the putty layer soft and fall off, thus maintaining the stability of the system, and the flexible putty has very good water resistance.

2. Flexibility

The external wall thermal insulation system suffers from severe temperature difference changes for a long time, and the thermal stress is quite large, mainly in the surface layer. Due to the excellent thermal insulation performance of the insulation layer, its surface temperature can reach 80℃ in summer, and the surface temperature change caused by sudden rainstorm after continuous sunny days in summer can reach as much as 50℃.

The high temperature in summer will also accelerate the aging of the surface layer, so the thermal insulation surface layer is prone to cracks. Through theoretical research and practical application, it is concluded that "rigid waterproof technical route" is the main cause of cracks in thermal insulation surface. Under the influence of this technical route, the materials used are all prestressed, high strength and high elastic modulus, leaving no way to fully release thermal stress.