Using IRA Brick Abbotsford BC

Masonry walls built using brick units with a low Initial Rate of Absorption (IRA) often have lower bond strength than walls built with moderate IRA units in Abbotsford, because very little water is available to be absorbed into the unit during installation into the wall.

Miller Vinyl Sundecks
(604) 768-4685
33710 Marshall Road
Abbotsford, BC
 
James Dobney Inspections - Abbotsford
(604) 942-8272
Abbotsford, BC

Data Provided by:
Action Home Inspections Ltd
Home Inspector
Courtenay, BC

Data Provided by:
North Shore Home Services Ltd.
(604) 988-5294
230 MacKay Road
North Vancouver, BC
 
Ken Buck & Associates
604-302-0144
Abbotsford, BC

Data Provided by:
Ken Buck & Associates
604-302-0144
Abbotsford, BC

Data Provided by:
James Dobney Inspections - Maple Ridge
(604) 942-8272
Maple Ridge, BC

Data Provided by:
Armstrong Crane & Rigging Inc.
(250) 546-8202
4135 Spallumcheen Way
Armstrong, BC
 
Fairhome Building Inspections Inc.
250-661-7363
Victoria, BC

Data Provided by:
VanGreen Home
(604) 960-1076
103-149 W 20th St
North Vancouver, BC
 
Data Provided by:

Using IRA Brick

Provided By:

Source: MASONRY CONSTRUCTION MAGAZINE
Publication date: April 1, 2004

I have heard that if you use brick with a very low IRA in masonry walls, they will float on the mortar during construction, which results in later water leakage problems.

Is this a common problem? If so, which IRA brick should not be used in masonry walls?

Masonry walls built using brick units with a low Initial Rate of Absorption (IRA) often have lower bond strength than walls built with moderate IRA units because very little water is available to be absorbed into the unit during installation into the wall. absorption There is little mechanical bonding without water absorption, which often results in lower bond strength. Because little water is absorbed, little paste is absorbed, which limits chemical bonding.

Using mortars with higher cement content often significantly increases bond strength. However, as the cement content of mortar goes up, there is an increase in the rate of mortar shrinkage. High shrinkage can result in cracking of the mortar, which increases water penetration.

When it pertains to low IRA brick, if a particular combination of mortar and brick has relatively low bond strength, it does not necessarily mean that the rate of water penetration is correspondingly increased. In fact, some studies suggest that low IRA brick may actually out perform brick of a mid-range IRA in resisting water penetration.

In research performed by J. Gregg Borchelt and J. A. Tann, which is summa...

Click here to read full article from Masonry Construction