The Importance of Water Retention of HPMC
April 24th 2024
1. The redispersible latex powder affects the strength of the putty powder. Adding the redispersible latex powder to the putty powder and mortar can increase its strength, and it has a great help in improving the hardness.
The relationship between the added amount and the strength of putty:
2. When the amount of redispersible latex powder increased from 0 to 1 kg, the bonding strength of putty powder increased by only 0.118 M Pa, and the increase in bonding strength of putty powder increased to a lesser extent. When the blending amount is increased to 2 kg, the bonding strength of the putty powder is greatly increased to 1.142 MP a, which continues to increase with the increase in the amount of redispersible powder added, which is greater than the 0~1.0% segment. But its growth rate is smaller than that of 1.0% ~ 2.0%. But when the amount of redispersible latex powder reaches a certain amount, the emulsion can continuously form a film within a certain range, forming a cross in the putty layer. Network structure, and it is combined with the inorganic calcium hydrate network structure of gray calcium powder, or cement, fly ash, etc., thereby greatly increasing the bonding strength of putty.
3. When the amount of redispersible latex powder exceeds 2.5 kg, the bonding strength of putty powder will decrease. When the amount of redispersible latex powder exceeds 2.5 kg, the large area continuous film will form Weakening the continuity of the inorganic hydrate network structure, resulting in a decrease in the bonding strength of the putty.
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