ZM-21 Masonry mixture

Masonry mixtures

Masonry mortar, manufactured industrially in the form of a dry mixture with mineral binding fillers and agents. After mixing with water forms a homogeneous adhesive mass of grey colour. Water resistant. Frost resistant.

Use of masonry mixture ZM-21

Masonry mortar for interior and exterior works. Suitable for walls and columns made of ceramic, sand-lime and concrete elements, as well as those of cellular concrete and lightweight aggregate concrete.

Technical data:

  • Composition: Portland cement, dry hydrated lime, mineral fillers, additives
  • Bulk density of fresh solution: about 1,45 g/cm3
  • Bulk density hardened solution: about 1,80 g/cm3
  • Compressive strength after 28 days: M10
  • Flexural strength after 28 days: ≥ 2 MPa
  • Water absorption caused by capillary suction: < 0,86 kg/m2Vmin
  • Vapor permeability μ (table value): 15/35
  • Seam strength (table value): > 0,15 MPa
  • Heat conductivity coefficient λ (table value): < 1,17 W /(m*K)
  • Aggregate size: 0-2 mm
  • Reaction to fire: class A1
  • Chloride content: ≥ 0,01%Cl
  • Soluble chromium content VI: ≤ 0,0002%
  • Package: 25 kg bags
  • Storage: up to 6 months from the manufacturing date in a dry place in original sealed packages
Wall thickness Consumption of dry mixture per 1m2 of wall made of:
solid and hollow brick checker brick, hollow U-shaped blocks hollow glass blocks
6,5 cm 14 kg - - -
12,0 cm 37 kg 28 kg - -
18,5 cm - - 33 kg -
18,8 cm - - - 41 kg
25,0 cm 94 kg 70 kg 52 kg -
28,8 kg - - - 71 kg
38,0 cm 186 kg 116 kg - -
44,5 cm - - 107 kg -
48,8 cm - - - 135 kg
Operating temperature masonry mixture

Operating temperature: from +5oC to +25oC

Suitability time:  about 2 hours (at the temperature of +20oC and air humidity of about 60%) after mixing with water; about 1 hours at the temperature of +25oC

Performance: about 1.88 kg of dry mix for 1 dm3 of fresh mortar

Mixing proportions: about 3,5 l of water per 10 kg of dry mixture