Cement. Gypsum. Lime. Mortar (ICS 91.100.10)
DRS 144: 2020 Concrete building blocks and bricks — Specification (21 page(s), in English)
This Draft Rwanda Standard specifies precast solid and precast hollow concrete masonry building blocks and bricks for use in interior and exterior use in constructing structural and non-structural masonry walling , and are made from portland cement, water, and suitable mineral aggregates with or without the inclusion of other materials.
Building block and bricks covered by this standard are:
a) Hollow load bearing and non-load bearing cement blocks;
b) Solid load-bearing cement blocks and bricks.
This Standard specifies performance requirements related to dimensional accuracy, density, strength, water absorption, shrinkage and moisture movement for hollow blocks and solid cement blocks or bricks.