Masonry mortar is used to bond various types of bricks: red clay bricks with low water absorption, lime sand bricks with strong water absorption and aerated lightweight concrete. Generally speaking, bricks with low water absorption require a thick coat of mortar with low water retention, while smooth, flat bricks with high water absorption require a thin coat of mortar with high water retention. DIN 18555Part 1-9 describes the inorganic Test methods for binder mortars. Most of them are suitable for use in masonry mortars as well as cement-based renders and gypsum-based mortars.
Typical formulas for masonry mortars and air-entrained lightweight concrete adhesives(By weight percentage)
Ingredients Masonry mortar aerated lightweight mixConcrete adhesive
Cement(For exampleCEMI32. 5R) 12-20 36
Hydrated lime 0-6 4
0-0． 1mmLimestone powder10-20 -
0-4mmQuartz sand or limestone sand60- 80 -
0 -0． 5mmQuartz Sand- 60
Air-entraining agent 0.01-0.03 -
Medium viscosity methylcellulose ether 0.02-0.04 -
High viscosity methyl Cellulose ether - 0.3-0.4 </p
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