Building Management Hawaii April/May - (Page 20)
Tips On How To Reduce
Spalling On Newer Buildings
By Jon Brandt, S.E.
I see so much spalling damage on buildings, is there anything
being done to keep it from happening on newer buildings?
I really don’t see anything that would stop spalling on new
concrete buildings but there have been several improvements
that will limit it. The most obvious is not having concrete
directly exposed to the elements. You see newer buildings
with decorative cladding over the concrete or some type of
waterproofing on the concrete surface, and that will greatly
help. But there have also been some improvements with the
concrete mix that causes it to be more resistant to spalling.
Concrete is a porous material, meaning that small cracks
allow water to pass thru the material. And it’s the water that
passes into the concrete that rusts the reinforcing causing
the spalling. So where we can reduce the porosity of the
concrete we can also reduce the spalling. Two common things
are happening with concrete now to reduce the porosity
compared to what was being done 20 years ago.
One of those is the use of higher strength concrete. What
has been found is that the higher the concrete strength the
less porous it is. As an engineer, I decide how strong the
concrete needs to be for a project. In the past we didn’t use the
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All rights reserved.
April - May 2013
Table of Contents for the Digital Edition of Building Management Hawaii April/May
Lifts: Elevators & Escalators
Service Providers Leverage Cutting-Edge Technology
Time To Modernize?
Ready To Switch Gears?
Concrete: Restoration & Repairs
When To Test For Lead
3 Steps For A Solid Spalling Job
Phase The Work
Tips On How To Reduce Spalling On Newer Buildings
The Difference Between Repair & Restoration
Equipment Breakdown Insurance
Toolbox Talk: How to choose the correct ladder for the job.
Industry News and Movers & Shakers
On Site: Saving Staff
Building Management Hawaii April/May