Density of waterproof mortar

To make a good waterproof mortar, it is not only necessary to improve its water repellency but also to enhance its water pressure resistance, which often depends on the density of the mortar.

What methods can be used to improve the density of waterproof mortar?

Optimal aggregate mix

Use aggregates of different mesh sizes in a reasonable proportion to reduce the porosity of the waterproof mortar.

Water-reducing agent

Here, you can choose a suitable water-reducing agent (such as polycarboxylic acid or melamine) to reduce the water demand of waterproof mortar and further reduce the porosity.

High water retention thickener

Similarly, using a high water retention, low admixture, and low viscosity thickener (such as cellulose ether) can also reduce the water demand of waterproof mortar.

Foam inhibitors

Using appropriate foam inhibitors in waterproof mortar can suppress bubbles introduced during mixing and eliminate bubbles that gather on the surface, thereby reducing porosity.