1. Cementitious materials and aggregates for mortar and grout shall comply with CSA A179, "Mortar and Grout for Unit Masonry."
2. Water and aggregate shall be clean and free of significant amounts of deleterious materials.
3. Lime used in mortar shall be hydrated.
4. If lime putty is used in mortar, it shall be made by slaking quicklime in water for not less than 24 h or soaking hydrated lime in water for not less than 12 h.

1. Mortar types shall be in accordance with Table 9.20.3.2.-A.
2. Mortar for glass block masonry shall be
   1. Type S Portland cement-lime where exposed to the exterior, or
   2. Type S or N where protected from the exterior.
3. Mortar shall be mixed within the proportion limits provided in Table 9.20.3.2.-B, with sufficient water to bring the mixture to a consistency adequate for laying masonry units.
4. Grout shall be mixed within the proportion limits provided in Table 9.20.3.2.-C, with sufficient water to provide a suitable flow to fill all voids completely, without excessive segregation or bleeding.
5. Except as provided in Sentence (6), mortar shall be used and placed in final position
   1. within 1.5 h after mixing when the air temperature is 25°C or higher, or
   2. within 2.5 h after mixing when the air temperature is less than 25°C.
6. Mortar and grout containing a set-control admixture shall be manufactured off-site in a batching plant and shall be used and placed in final position within a time not exceeding the useful life stipulated by the manufacturer.
7. Grout used for reinforced masonry shall be placed in accordance with the requirements of CSA A371, "Masonry Construction for Buildings."

Table 9.20.3.2.-A
Mortar Use
Forming Part of Sentence 9.20.3.2.(1)

Table 9.20.3.2.-B
Mortar Mix Proportions (by volume)
Forming Part of Sentence 9.20.3.2.(3)

Table 9.20.3.2.-C
Grout Mix Proportions (by volume)
Forming Part of Sentence 9.20.3.2.(4)