Fritz-Pak Corporation · Savings & Applications Guide
Page 6
Applications
A small amount of air entrained in concrete
has been found to greatly increase the durabil-
ity of concrete subject to freeze-thaw weather
conditions. Air bubbles within the concrete al-
low for expansion of this water within the con-
crete during freezing conditions, which keeps
the concrete from cracking. The air entrained
in concrete made without admixtures is usu-
ally not suffi cient to protect it from freeze-
thaw conditions over time. In order to increase
the air content of concrete, air entraining ad-
mixtures are used. Most jobs where concrete
will be exposed to freeze-thaw conditions will
specify air content that requires the use of air
entraining admixtures to comply.
Getting the air content right can be diffi cult
to achieve; often the air content measured at
the plant will change by the time concrete is
ready to be placed at the jobsite. Factors like
distance and time from the plant, water con-
tent, temperature, cement type, use of fl y ash,
and other admixtures all play a role in the fi -
nal air content. Best practice is to measure the
air content at the jobsite immediately before
placing. If too much air is present, strength will
be reduced. If not enough air is entrained, du-
rability will be reduced.
Fritz-Pak's Super Air Plus and Air Plus are air
entraining admixtures that can be used at
the plant as the primary air entrainment. They
have a very useful application at the jobsite to
quickly and reliably add more air if the load is
found to be too low in air content. The cost is
very reasonable. Super Air Plus and Air Plus
are made with modifi ed Vinsol resin, which is
a natural resin that has proven to be effective
for many years in increasing air content.
What is the difference
between Air Plus
and Super Air Plus?
The only difference between the two
products is the concentration of active
ingredient. Super Air Plus has twice the
concentration of Air Plus.
Air Plus is recommended in plants where
the number of mixes is small and the
variation in raw materials, i.e. sand, cement
and aggregates, is very small. Thus the
variation in air content is small.
Super Air Plus is recommended in plants
with a large number of mixes or variations
in their sources of raw materials.
Air Entrainment
Summary :
Most jobs where concrete will be exposed to freeze-thaw conditions will specify air content that requires the use of air entraining admixtures to comply. Fritz-Pak's Super Air Plus and Air Plus are air entraining admixtures that can be used at the plant as the primary air entrainment. Super Air Plus and Air Plus are made with modifi ed Vinsol resin, which is a natural resin that has proven to be effective for many years in increasing air content.
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content,concrete,super,small,admixtures,conditions,air,ery,entrained,time,jobsite,plant,entraining