The amount of Redispersible Polymer powder added is large, but there is no obvious change in performance

[Ankur]

The amount of Redispersible Polymer powder added is large, but there is no apparent change in performance, and there is no increase in strength. What do you think?

 

[Cassie]

You need to understand what you are using Redispersible Polymer powder for. The primary function of RDP is to improve cohesion (especially with organic matter), flexibility, water resistance, thermal aging, and freeze-thaw resistance. Adding more than 1% is best to improve the indicators above significantly. Adding RDP will gradually reduce the compressive strength of the overall mortar, and most products will increase significantly once added. For the mortar or putty involved in plastering, the cement strength in the early stage is slower, which cannot meet the rapid construction. However, adding RDP can improve surface strength.

 

[Shamil]

Time is short.

 

[anna]

It is normal. An excessive amount of Redispersible Polymer powder will increase the water demand of the mortar, causing apparent retardation and significant shrinkage, and the compressive strength will be lower.

 

[Chanliss]

The adhesiveness of cement is greater than that of Redispersible Polymer powder(RDP). RDP only increases the toughness of cement. Using too much will definitely decrease the adhesive property, as well as the water resistance.

 

[Luis]

The Redispersible Polymer powder increases the bending resistance and reduces the pressure resistance. In addition, it depends on your RDP's glass transition temperature, which affects rigidity and hardness.

 

[Roy]

Choosing a rigid one will lead to a better effect; the flexible one is not obvious.

 

[Scott Kaplan]

The main changes of the large amount of RDP are as follows: 1. After adding water and stirring, the wet state of the mortar has a sense of oiliness and feels very moist. After adding water and mixing, stir it evenly soon. 2. The toughness of the batch wall after drying is enhanced, giving excellent mortar flexibility, and enhanced anti-cracking resistance 3. Test whether the bond strength is improved, and do several sets of pull-out tests with different amounts of RDP; the data will tell you the difference.