Effect of Hydroxypropyl Methyl Cellulose on the Function of Foam Concrete

Following the addition of hydroxypropyl methylcellulose to 00.5% in foamed concrete, the slump is slightly reduced.

1) When the content of hydroxypropyl methyl cellulose does not exceed 0.05%. The participation of hydroxypropyl methyl cellulose can significantly improve the fluidity and viscosity of the foam concrete slurry.
After the hydroxypropyl methyl cellulose is dissolved, a wet flexible film is formed between the solid particles and the gas bubbles, which plays an excellent lubricating effect during the stirring process. It also makes the bubbles change without being easily disillusioned. The loose and even "balls" in the slurry effectively improve the fluidity of the fresh slurry:
2) If the amount of hydroxypropyl methylcellulose exceeds 0.05%, the slurry will become too viscous and the fluidity will be greatly reduced.
Therefore, 0.05% hydroxypropyl methylcellulose not only ensures the slump, but also stabilizes the bubbles, which is the best blending amount.

In short, the slurry is constantly losing water during the hardening process. The internal foam is also constantly disillusioned, and the hardening body is inevitably shortened. This causes the volume of the hardening body to be unstable, and the addition of hydroxypropyl methyl cellulose is both hardening. The body provides excellent water retention, and can stabilize the internal foam of the hardened body through the characteristics of slurry hardening and hydroxypropyl methylcellulose film hardening, and then play an excellent foam stabilizing effect, reducing the volume of the hardened body .