1 volume mixture of additive and cement
3 volumes wash (mud-free) sand
0,5 volume mixing water
When adding mixing-water, avoid overdose!
In the course of mixing, the substance slackens, its volume increases (get
foamy). Time allowed for mixing: 10-15 minutes.
The properly mixed mortar sustains its
loose structure for two or three hours without the eduction of the mixing-water
on the surface.