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Simply put, a pumping aid is a concrete admixture that makes concrete mixtures easier to pump through a line. It acts as a pump primer and lubricant for the mix and ultimately reduces the pumping pressure necessary to place concrete without altering the sand, cement, water, and aggregate content. Effective pumping aids can also minimize the wear and tear on pumping equipment, thereby extending their lifespan and reducing maintenance costs. By selecting a high-quality pumping aid, construction professionals can achieve a uniform distribution of cementitious materials and improve the overall efficiency and quality of concrete placement.
Component | Formulation A
|
Formulation B
|
---|---|---|
Cement (kg) | 307
|
307
|
POLYOX™ WSR-301 (g) | 60
|
0
|
Sand (kg) | 863
|
863
|
Aggregate and Water (kg) | 1259
|
1259
|
POLYOX™ WSR 301 was included in Formulation A at 25 ppm and reduced the pumping pressure of the mix by 16% without impacting the compressive strength or causing shrinkage upon drying. In addition, it stabilized air content, allowing for a 20%–30% reduction of air-entraining agents without any detriment to the workability of the concrete.
Improves water retention and distribution with highly porous and harsh aggregate
Pumps longer distances at lower pressures
Prevents aggregate segregation
Stabilizes sprayed concrete
Stabilizes foam in concrete
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