Fritz-Pak Corporation · Savings & Applications Guide
Page 15
Applications
Today more than 25% of concrete in the Unit-
ed States is pumped. For a concrete mix to be
pumpable, the aggregates need to be well-
graded, with no gaps in the grading, a relative-
ly high amount of cement is needed to keep
the mix together. In many cases, the amount
of cement required for pumping is higher
than the amount necessary to reach specifi ed
strengths. So a balance between costs needs
to be maintained.
While concrete pumps have improved and
become more powerful over the past 20 years,
there is variation in equipment age and size
in the fi eld. The ready mix producer may dis-
cover that a mix that was pumpable by one
company or piece of machinery may not
be with another. Another factor that affects
pumpability is the origin of and type of aggre-
gates. Natural aggregates tend to be rounded,
smooth and easier to pump, while crushed ag-
gregates with more jagged edges are gener-
ally harder to pump. When pressure is applied
to concrete in pumping, the water and the
paste tend to separate from the aggregates,
causing plugs in the line.
Fritz-Pak's Slick-Pak II is designed to be add-
ed directly to concrete in the ready mix truck
to improve pumpability. It keeps the mix
from segregating, by thickening the water
and binding the cement thus making it much
easier to pump. Slick-Pak II also has lubricat-
ing properties which help the mix slide better
through the pipe and hoses. The formulation
of Slick-Pak II is patented, and has been used
commercially since the early 1990's.
Product Information
Slick-Pak II:
· Concrete Pumping Aid.
· Patented formulation.
· Non-hazardous material.
· Will not reduce the strength of concrete.
· At this time there are no ASTM standards
for concrete pumping aids.
Pumping Aid
Summary :
For a concrete mix to be pumpable, the aggregates need to be well- graded, with no gaps in the grading, a relative- ly high amount of cement is needed to keep the mix together. Natural aggregates tend to be rounded, smooth and easier to pump, while crushed ag- gregates with more jagged edges are gener- ally harder to pump.
Tags :
concrete,mix,pumping,slickpak,pump,aggregates,amount,cement,pumpable,tend,pumpability,while,ready