scope:

General

This Standard specifies requirements for

a) mortar for use in bedding, jointing, and bonding of masonry units; and b) grout for use in filling core, cell, or cavity space in unit masonry construction.

Notes:

1) The term "unit masonry" refers to masonry construction using clay (shale), calcium silicate (sand-lime), or concrete masonry units, with individual units not more than 200 mm high and 400 mm long, and not less than 75 mm thick. For other masonry units, the proportions of ingredients and any additives to be used in the mortar for masonry construction should be based on laboratory or field experience with the mortar ingredients and the particular masonry units to be used.

2) It is not the intent of this Standard to imply that all unit masonry constructed with mortar containing only conventional ingredients mixed conventionally will satisfy the design strengths in CSA S304 or the minimum bond requirements of Clause 9.1.1 of this Standard. When mortar bond is a concern, and the mortar considered for use satisfies the requirements of this Standard, the manufacturer of the unit should be contacted to provide independent laboratory data or to certify adequate bond with the mortar. Alternatively, when reasonable assurances of performance cannot be so obtained, mortar bond tests may be carried out under expected field conditions, before commencement of work, in accordance with ASTM C1072 or CSA S304.