AS 4773.2:2015 pdf download.Masonry in small buildings Part 2: Construction.
1.4 DEFINITIONS
For the purposes of this Standard, the definitions below apply.
1.4.1 Aggressive soils
Soils where walls are expected to be attacked by salts in the groundwater.
1.4.2 Air-enirainlng agent
An admixture used to form discrete, non-coalescing, small air bubbles, up to I mm in diameter. In mortar, it is used to improve workability and thus allow a reduction in fine aggregate and/or water.
NOTl: An air-entraining agent is not the same as methylcellulose-based’ water thickener.
1.4.3 (‘onnectors
Any components, other than wall ties. lintels and shelf angles. used in masonry construction to aid the structural integrity of the building or to provide support or stability to building finishes.
1.4.4 Control joints
Joints or gaps constructed in masonry to control and absorb movements in the masonry. (‘ontrol joints include the following:
(a) Contraction joints (or opening control joints), which open as the masonry contracts or shrinks.
(b) Expansion joints (or closing control joints), which close as the masonry expands and/or associated concrete shrinks.
(c) Articulation joints, which move to compensate for movements in the supporting structure.
1.4.5 Exposure environments
1.4.5.1 Severe marine’
Areas up to 100 m from a non-surf coast and up to 1 km from a surf coast. The distances specified are from the mean high-water mark.
1.4.5.2 Mcirine
Areas from 100 m to I km from a non-surf coast and 1 km to 10km from a surf coast. The distances are from the mean high-water mark.
NOTE: Sheltered bays such as Port Phillip Bay and Sydney Harbour arc considered to he non-surf coasts
1.4.5.3 Industrial
Environment within 1 km of industrial areas producing significant acidic pollution. NOTE: The only areas within this category are around major industrial complexes. There are only a few such regions in Australia, for example, around Port Pine.
1.4.5.4 Moderaie
Area with light industrial pollution or very light marine influence, or both.
NOTE: Typical areas are suburbs of cities on sheltered hays such as Melbourne, Adelaide and Hobart (except those areas near the coast) and most inland cities.
1.4.5.5 Mild
Environment that is remote from the coast, industrial activity and the tropics. NOTE: Sparsely settled regions such as outback Australia are typical examples. hut the category also includes rural communities other than those on the coast.AS 4773.2 pdf download.